Oil-based Drill Cuttings Research Articles

Numerical simulation of plasma gasification of oil-based drilling cuttings

In this paper, ASPEN PLUS commercial software is used to simulate the plasma gasification process of oil-based drilling cuttings, and the numerical simulation results are analyzed in detail. The conclusions can provide theoretical guidance for subsequent experiments and practical engineering applications. A set of reactor models suitable for gasification of such substances was established by using Gibbs? free energy minimization principle, and the accuracy of the model was verified by comparing the numerical simulation results with the experimental results. In this model, the effects of plasma torch power, air equivalent ratio, moisture content of feed, and the amount of CO2 added on the gasification results were simulated. Through systematic analysis, the optimal gasification parameters are determined output power of plasma torch is 27.5 kW, air equivalent ratio is 0.26, moisture content of feed is 6%, and the amount of CO2 added is 6 kg per hour.

Numerical Study on Pyrolysis Characteristics of Oil-Based Drilling Cuttings in a Two-Layer Screw-Driving Spiral Heat Exchanger

Numerical Study on Pyrolysis Characteristics of Oil-Based Drilling Cuttings in a Two-Layer Screw-Driving Spiral Heat Exchanger

Municipal solid waste incineration (MSWI) fly ash could be used as a catalyst for pyrolysis of oil-based drill cuttings from shale gas exploitation industry

Oil-based drill cuttings (OBDC) and MSWI fly ash are both hazardous wastes and are produced in huge amounts every year. OBDC are often treated by pyrolysis for recovering hydrocarbons, while municipal solid waste incineration (MSWI) fly ash is solidified and then landfilled. This study found that MSWI fly ash had the porous structure with catalytic metal element loaded on the solid acid catalyst structure. Moreover, the specific surface area and pore size of MSWI fly ash were suitable for cracking and mass transfer of hydrocarbons in OBDC. Control experiment indicated that MSWI fly ash could promote pyrolysis of OBDC by 14.5% compared with that without any catalyst. Orthogonal experiments further confirmed that the catalytic properties of MSWI fly ash were comparable to some commercial catalysts and laboratory catalysts. Thermogravimetric results showed that the pyrolysis of OBDC was divided into three stages, and the activation energy of each stage increased gradually. Kinetic analysis proved that using MSWI fly ash as catalyst could reduce the activation energy of the third stage which needed the maximum activation energy to react, so promoted the cracking of heavy hydrocarbon and enhanced the recycling rate of hydrocarbons in OBDC.

Degradation of petroleum pollutants in oil-based drilling cuttings using an Fe2+-based Fenton-like advanced oxidation processes.

Oil-based drilling cuttings (OBDC) contain a large amount of total petroleum hydrocarbon (TPH) pollutants, which are hazardous to the environment. In this study, Fe2+-activating hydrogen peroxide (Fe2+/H2O2), peroxymonosulfate (Fe2+/PMS), and peroxydisulfate (Fe2+/PDS) advanced oxidation processes (AOPs) were used to treat OBDC due to the difference in the degradation capacity of TPH caused by the type of free radical generated and effective activation conditions observed for the different oxidants studied. The results showed that the oxidant concentration, Fe2+ dosage, and reaction time in the three AOPs were greatly positively correlated with the TPH removal rate in a certain range. The initial pH value had a significant effect on the Fe2+/H2O2 process, and its TPH removal rate was negatively correlated in the pH range from 3 to 11. However, the Fe2+/PMS and Fe2+/PDS processes only displayed lower TPH removal rates under neutral conditions and tolerated a wider range of pH conditions. The optimal TPH removal rates observed for the Fe2+/H2O2, Fe2+/PMS, and Fe2+/PDS processes were 45.04%, 42.75%, and 44.95%, respectively. Fourier transform infrared spectrometer and gas chromatography-mass spectrometer analysis showed that the alkanes in OBDC could be effectively removed using the three processes studied, and their degradation ability toward straight-chain alkanes was in the order of Fe2+/PMS > Fe2+/PDS > Fe2+/H2O2, among which Fe2+/PMS exhibited the optimal removal effect for aromatic hydrocarbons. Scanning electron microscope, energy dispersive spectroscopy, and X-ray diffraction results showed no significant changes in the elemental and mineral composition of OBDC before and after treatment. Therefore, this study provided a theoretical reference for the effective degradation of TPH pollutants in OBDC.

Oil-Based Drilling Cuttings from Shale Gas Wells Treated with CO2 Switchable Hydrophilic Solvents: Priority Pollutant Migration and Produced Wastewater Assessment

The exploitation of shale gas resources brings in abundant hazardous oil-based drilling cuttings (ODBCs). Herein, N, N-Dimethylcyclohexylamine (DMCHA) acted as the CO2 switchable hydrophilic solvents (SHSs), and the OBDCs treated with DMCHA were studied, especially priority pollutant migration and produced wastewater assessment during the extraction process. The petroleum hydrocarbon content of OBDCs decreased from 10.73 to 0.84 wt% after the DMCHA extraction was conducted at a DMCHA/OBDCs liquid–solid ratio of 20:1, 35 °C, and 200 rpm for 30 min. Using the CO2 switchability of SHSs, the petroleum hydrocarbon and DMCHA were recovered. There was wastewater, which was produced after recovering DMCHA, and the produced wastewater assessment showed that chemical oxygen demand, 5-day biochemical oxygen demand, total nitrogen, total organic carbon, and petroleum were 561.00, 238.00, 40.60, 309.00, and 0.27 mg/L, respectively. Meanwhile, phenols (0.0031 mg/L), naphthalene (0.0000129 mg/L), phenanthrene (0.000059 mg/L), anthracene (0.000058 mg/L), as well as heavy metal ions such as Cu (0.01 mg/L) could be detected in the produced wastewater. As a result, a priority pollutant migration mechanism from ODBCs to the produced wastewater was proposed. This would be helpful for the better management policy making of the ODBCs treated by using CO2 SHSs and the produced wastewater.

Extraction and separation of petroleum pollutants from oil-based drilling cuttings using methanol/n-hexane solvent

Oil-based drilling cuttings (OBDC) have a high content of petroleum pollutants with strong mutagenic, carcinogenic and teratogenic properties. Solvent extraction can effectively separate petroleum pollutants from OBDC. However, single solvent has preferred solubility for different types of petroleum pollutants in OBDC, resulting in a lower oil removal efficiency. Therefore, based on the polarity difference between methanol (Me) and n-hexane (He), a method was developed to extract petroleum pollutants from OBDC using Me&He. Compared with methanol or n-hexane alone, the oil removal efficiency of compound Me&He was significantly increased to 94.58 %, and 37, 37 and 77 petroleum pollutants were extracted using Single methanol, Single n-hexane and Compound Me&He, respectively. Methanol extraction preferentially solubilised polar molecules such as alcohols and carboxylic acids, while n-hexane extraction preferentially solubilised alkanes and other nonpolar molecules. Compound Me&He compensated for the low solubility of single solvents for petroleum pollutant extraction from OBDC. Additionally, because methanol and n-hexane are not mutually soluble, it was easy to separate the recycled components. Compared with other common solvent extraction technologies, compound Me&He had advantages including simple operation and high oil removal efficiency. This study provided a theoretical basis and technical reference for the efficient processing and resource recycling of OBDC.

Degradation of petroleum hydrocarbons in oil-based drilling cuttings by a zero-valent iron Fenton-like advanced oxidation system

Oil-based drilling cuttings (OBDCs) containing large amounts of petroleum hydrocarbons generated from shale gas extraction constitute hazardous waste. In this study, the commonalities and differences of three systems, Fe0/peroxymonosulfate (PMS), Fe0/peroxydisulfate (PDS), and Fe0/H2O2, for treating OBDCs have been compared. The results show that oxidant initial concentration, Fe0 dosage, and reaction time are significantly positively correlated with the oil removal efficiency within certain ranges. Moreover, the initial pH is more critical in the Fe0/H2O2 and Fe0/PMS systems than in the Fe0/PDS system, with the oil removal efficiency being better under acidic conditions. FTIR and GC-MS analyses have shown that all three systems are effective in the removal of straight-chain alkanes, and the degradation ability decreases in the order Fe0/H2O2 > Fe0/PMS > Fe0/PDS. By characterizing the morphology, elemental composition, and crystal composition of OBDC before and after treatments, it showed that Fe0 was corroded and produced Fe2+, which benefited the formation of hydroxyl and sulfate radicals by reacting with oxidants (H2O2/PMS/PDS) and was responsible for the degradation of petroleum hydrocarbons of OBDCs. This study may provide theoretical support for the development and optimization of a technology for rendering OBDCs harmless.

Pyrolysis kinetics and environmental risks of oil-based drill cuttings at China’s largest shale gas exploitation site

Chongqing Fuling shale gas field, the largest shale gas exploration site in China, produces a large amount of oil-based drill cuttings (OBDC) every year, which is a hazardous waste. Traditional treatment methods such as solidification/stabilization did not recycle the valuable components such as petroleum hydrocarbons. Pyrolysis is proven to be an efficient method that can recover those components. This study firstly investigated the pyrolysis kinetics by two different methods on the basis of detailed material characterization, and then taking the workers and the surrounding ecological environment as the analysis object, the human health risk assessment (HHRA) and ecological risk assessment were evaluated respectively before and after pyrolysis. The results showed that the pyrolysis of OBDC was divided into three stages, and the cracking of light hydrocarbons stage was the key control step for pyrolysis process. The activation energy E increased gradually during the pyrolysis progress. The HHRA results showed that pyrolysis could greatly reduce the non-carcinogenic risk, carcinogenic risk and ecological risk by 59.6 %, 62.8 % and 75 % respectively. However, the carcinogenic risk after pyrolysis was still higher than the critical value 10−6.

Development and validation of diffusion-controlled model for predicting polycyclic aromatic hydrocarbons from baking-free brick derived from oil - based drilling cuttings

Investigating the release of organic pollutants from bricks made from solid waste is essential. Based on Fick's laws of diffusion, the diffusion model and diffusion-degradation model of polycyclic aromatic hydrocarbon (PAH) emission from the bricks were deduced. The degradation and 64-day emission of PAHs in solid bricks made of oil-based drill cuttings were observed experimentally. The emission and degradation characteristics of 14 PAHs were obtained and fitted with the diffusion and diffusion-degradation models. The emission of most of the PAHs from the bricks at the beginning was in good agreement with the diffusion model, except for benzo[a]anthracene, pyrene, benzo[b]fluoranthene, benzo[k]fluoranthene, and benzo[a]pyrene. However, the emission of PAHs after some time was significantly lower than the theoretical value of the diffusion model. Moreover, fitting with the diffusion-degradation model gave better results, indicating that a joint diffusion-degradation mechanism controlled the emission of PAHs. Therefore, the diffusion-degradation model can better predict the long-term emission of PAHs in bricks made of oil-based drill cuttings.

Research Progress and Prospects on the Treating and Disposal for Waste Oil-Based Drilling Cuttings from Shale Gas Wells

Oil-based drilling cuttings (OBDC) from shale gas wells is a kind of typical hazardous waste produced during the exploration and development of shale gas reservoirs, which will endanger the natural ecosystem and human health. This article summarized the OBDC treating and disposal methods commonly used all over the world. The treating methods were divided into restriction, separation, and degradation, while the disposal methods were divided into landfill, land farming, and resource recovery. The technical principles, technological process, advantages, and limitations of existing OBDC treating and disposal methods were overviewed in detail, and the development prospects of OBDC and resource recovery were illustrated as well. Finally, we proposed to maximize the resource recovery of OBDC by multitechniques processing, tracking the processed products to improve the reliability of product quality. In addition, the data system for original materials used for different methods should be established to service industrial development.

The pozzolanic activity of calcined oil-based drilling cuttings-aluminosilicate composites.

In order to reduce the environmental impact of shale gas production and towards the attenuation of artificial pozzolanic materials production cost, new oil-based drilling cuttings (OBDCs) pozzolanic materials have been introduced. After calcination, the chemical composition and the pozzolanic activity of oil-based drilling cuttings residue (OBDCRs) were investigated. The combination of X-ray diffraction (XRD), thermogravimetric analysis (TG), and Fourier transform infrared (FTIR) techniques shed light on impacts of pretreatment, calcination temperature, and Ba2+ on minerals' structure and pozzolanic activity. The results showed that, after high temperature calcination, the components of Si or Al in the OBDCRs particle surface and structure were activated and recombined to produce corresponding activity. Ba2+ could promote the pozzolanic activity of OBDCRs. The 28-day-compressive strength of OBDCRs was bigger than 31.33Mpa, and the compression strength ratios of cement mortar were bigger than 65%. Therefore, the pozzolanic reactivity of the treated OBDCs was competitive with that of conventional shale, which indicates that the heat treatment of OBDCs produces a cement substitute without any secondary pollution.

Removal of total petroleum hydrocarbons from oil-based drilling cuttings by a heat activation persulfate-based process

ABSTRACT Oil-based drilling cuttings (OBDC) are typical hazardous wastes generated during shale gas extraction. In this study, two persulfate-based advanced oxidation processes (AOPs), heat/PMS and heat/PDS, have been used to treat OBDC. The results showed that for the heat/PMS process, within a certain range, the oxidant dosage, temperature, and reaction time were significantly positively correlated with the degree of total petroleum hydrocarbon (TPH) removal. When these parameters were increased from their initial values to 3.57 mmol/g, 70°C, and 80 min, respectively, TPH removal rates increased significantly, by 20.95%, 18.68%, and 16.41%, respectively. However, further increases in these parameters had little effect on the TPH removal rate. Similar observations were made for the heat/PDS process. There are other differences between the two processes, including that the heat/PDS process required less oxidant to reach an effective activation state than the heat/PMS process, but required a higher temperature and a longer reaction time. Fourier-transform infrared spectrometry and gas chromatography-mass spectrometry have shown that both processes could effectively remove the light components of linear paraffins contained in OBDC. The heat/PMS process performed significantly better than the heat/PDS process in removing aromatic hydrocarbons and long-chain alkanes. Scanning electron microscopy, energy-dispersive spectrometry, and X-ray diffraction analysis implied that the elemental and mineral compositions of OBDC were not significantly modified by reaction in the heat/PMS and heat/PDS processes. This study may provide theoretical support for the technological development of heat activation and persulfate-based AOPs to remove TPH from OBDC.

Oil-based drilling cuttings pyrolysis residues at a typical shale gas drilling field in Chongqing: pollution characteristics and environmental risk assessment.

With the rapid development of unconventional natural gas such as shale gas, many oil-based drilling cuttings and their pyrolysis residues are produced, which are defined as hazardous wastes. In this paper, the pollution status of petroleum hydrocarbons and the leaching toxicity of eight heavy metals (Pb, Cr, Zn, Mn, Cu, Cd, Ni, and Hg) in the pyrolysis residues were studied. The ecological risk and human health risk were evaluated in the scenario where pyrolytic residues were used for paving as building materials. The results showed that the content of petroleum hydrocarbons in the pyrolysis residues was 7643.16 ± 169.67mg/kg. Zn in the pyrolysis residues was extremely polluted, Pb was moderately polluted, Cr, Cu, As were slightly polluted, and the leaching toxicity was far below the standard value. In the ecological risk assessment, the comprehensive potential ecological risk of multiple heavy metals in the pyrolysis residues was low. On the other hand, the pyrolysis residues had no non-carcinogenic risk to adults under the condition of paving, but there was an obvious non-carcinogenic risk to children, and the carcinogenic risk of adults and children was within an acceptable range. In addition, aiming at reducing the health risk of the population, suggestions were put forward to reduce the exposure risk of the population and the content of heavy metals in the pyrolysis residue, which provided a scientific reference for the standardized management of the pyrolysis residue of oil-based drilling cuttings and the research on the corresponding treatment process.

Treatment and novel resource-utilization methods for shale gas oil based drill cuttings - A review.

The oil exploration and production (E&P) industry has made outstanding contributions to gross domestic product (GDP) growth in many countries. In recent years, the gap between energy supply and demand has widened, and, simultaneously, demand for clean energy has gradually increased. As an emerging clean energy source, shale gas has received extensive attention. However, the environmental problems caused by oil and gas extraction and production should not be underestimated. Oil-based drill cuttings (OBDC) are typical hazardous solid wastes produced during oil/gas exploration and production processes. In addition, oil-based drill cuttings ash (OBDCA) is the main product of treated OBDC and should be further utilized to avoid pollution and waste of resources. This review describes relevant policies and regulations for the OBDC. The main treatment methods for OBDC have been systematically summarized. Compared to the standard method for resource utilization of OBDCA, a novel approach was proposed to utilize OBDCA as an environment-friendly functional material for environmental remediation. The future development prospects for OBDC were envisioned to achieve sustainable development goals.

Preparing high-strength and low-density proppants with oil-based drilling cuttings pyrolysis residues and red mud: Process optimization and sintering mechanism

This study aimed to assess the feasibility of manufacturing high-strength and low-density proppants from oil-based drilling cuttings pyrolysis residues (ODPR) and red mud (RM). The effects of ODPR and RM content on the performance of the proppants were studied, respectively. The optimum sintering condition was determined by response surface methodology (RSM), and the sintering mechanism was explored based on microstructural analysis of the proppants. The results showed that high-strength and low-density proppants with the breakage ratio of 8.6 % under 52 MPa closed pressure, bulk density of 1.45 g·cm−3, and apparent density of 2.96 g·cm−3 were obtained under the optimum preparation conditions (mass ratio of ODPR: RM: bauxite: MnO2 of 20: 8: 76: 4, sintering temperature of 1342 °C, sintering time of 1.0 h, sintering rate of 4.9 °C·min−1). The performance of the product proppants could meet the requirements of the Chinese Petroleum and Gas Industry Standard “Measurement of properties of proppants used in hydraulic fracturing and gravel-packing operations” (SY/T 5108-2014). ODPR and RM in the raw materials provided the chemical components of Al2O3, SiO2, CaO, BaO, Na2O, and K2O, which were involved in the formation of crystalline phases and molten phases during the sintering process. The performance of high-strength was primarily provided by the framework structure containing the crystalline phases and the dense structure caused by the molten phases. In addition, the Fe2O3 of RM would promote the generation of closed pores and then enhance the lightweight performance of proppants; however, excessive RM incorporation would lead to the formation of connected pores, which had a negative effect on the breakage ratio of proppants. This study not only creates a new pathway for recycling ODPR and RM within the shale gas industry but also provides a novel approach for manufacturing high-strength and low-density proppants.

Process optimization and mechanism of oil-based drilling cuttings treatment based on hydrophilic deep eutectic solvent

Oil-based drilling cuttings (OBDC) are hazardous waste, oil removal treatment must be done before they are re-utilized. Winsor I microemulsion (composed by microemulsion phase and remaining phase) cleaning is one of oil removal methods. However, there are many surfactants in the Winsor I microemulsion, which result in high cleaning cost and high possibility of surfactant contamination. In this paper, hydrophilic deep eutectic solvent (DES) and mineral oil were used to replace the microemulsion phase and remaining phase in Winsor I microemulsion, respectively, and a low-cost and surfactant-free cleaning agent was formed. The recommended DES was the mixture of choline chloride, methanol, and water with a molar ratio of 1:2.5:3, and the best cleaning agent was the mixture of DES and mineral oil with a mass ratio of 3:1. The recommended cleaning process was that added the OBDC into cleaning agent with a mass ratio of solid to liquid of 1:3, and stirred at room temperature for 100 min. At this condition, the oil content of OBDC reduced from 14.57 wt% to 1.34 wt%. In addition, the cleaning mechanism was discussed. The DES has low surface tension and good wetting property, which is similar with the microemulsion.

Petroleum hydrocarbons reduction by selected tropical grass species in oil-based drill cuttings contaminated soil

The potential of phytoremediation of oil-based drill cuttings (OBDCs) contaminated soil was assessed by measuring the level of petroleum hydrocarbons reduction. The contamination experiment was simulated in a randomized complete block design by factorial of 6 × 3 × 2 × 2 for grass species (Pennisitum purpureum, Panicum maximum, Andropogon gayanus, Heteropogon contortus, Axonopus compressus, and Chloris virgata), drill cuttings treatments (0%, 25%, and 50% OBDCs contamination), time (0 day of planting and 105 days of harvesting), and growth stage (young and mature). The parameters assessed were total petroleum hydrocarbons (TPHs) in soils, roots, and shoots; bioconcentration factor in roots and shoots; and translocation factor. The TPH reductions achieved in 25% treatment level were young A. compressus (58.01%), mature P. purpureum, young A. gayanus and C. virgata (44.24%), young P. purpureum (27.67%), mature A. compressus (25.29%), mature H. contortus (2.56%), mature P. maximum (4.01%), and unplanted soils (2.10%). Thus young A. compressus, A. gayanus, C. virgata, and mature P. purpureum are recommended for TPH reduction in 25% OBDCs contaminated soils. Young P. purpureum and mature A. compressus can be used to achieve 25% − 27% TPH reduction.

Pyrolysis of oil-based drill cuttings from shale gas field: Kinetic, thermodynamic, and product properties

Oil-based drill cuttings (OBDC), as a by-product produced from the exploration and extraction of shale gas fields, have received increasing attention as both hazardousness and potential energy resources. In this study, the pyrolysis performance of OBDC was investigated using a thermogravimetric analyzer (TGA) and fixed-bed reactor. Results showed that the primary decomposition of OBDC occurred at 85–360 °C. The average activation energy calculated by model-free methods Kissinger-Akahira-Sunose (KAS), Flynn-Wall-Ozawa (OFW), Starink, and Friedman (FM) models were 53.11, 57.87, 53.38, and 64.23 kJ/mol, respectively. The reaction model depended on the degree of conversion. Moreover, high heating rates were conductive to predict the reaction mechanism. The analysis results of pyrolysis products showed that with the temperature increased from 450 °C to 600 °C, the oil yield presented a first increased and then decreased tendency, and reached the highest (14.94%) at 500 °C, then decreased to 12.10% at 600 °C. The oil was mainly composed of diesel fraction (C12-C22), which can be used as a fuel or raw material. Moreover, the lower heating value (LHV) of gaseous products was the highest (31.80 MJ/Nm3) at 600 °C. In addition, the oil content of char was far below 0.3%, and the heavy metal content in char was below the national standards (CJ/T 362–2011, China), suggesting that OBDC pyrolysis could achieve energy recovery and harmless treatment simultaneously. The results can provide a theoretical basis and data support for optimizing and developing OBDC pyrolysis reactors and processes.

Study on the co-pyrolysis characteristics of oil-based drill cuttings and lees

The co-pyrolysis characteristics of oil-based drill cuttings (OBDC) and lees were studied through investigating the effects of pyrolysis temperature, pyrolysis time, heating rate, and mixing ratio on the pyrolysis/co-pyrolysis products. X-ray diffraction (XRD), scanning electron microscope (SEM), gas chromatography-mass spectrometry (GC-MS), and thermogravimetric-mass spectrometry (TM-MS) were used to analyze the pyrolysis products and pyrolysis procedure. The results showed the presence of a synergistic effect between OBDC and lees in the co-pyrolysis process. Under optimal conditions: mass ratio of OBDC: lees at 7:3, holding temperature at 350 °C, holding time for 60 min and heating rate at 10 °C/min, the petroleum content in the solid product obtained from the mixed sample was 491.9 mg/kg, which complies with the grade A of GB 4284-2018. “Agricultural Sludge Pollutant Control Standard.” In addition, the quality of the liquid gas product and gas product by co-pyrolysis was improved. This study provides a reference for reducing the generation of hazardous pyrolysis substances in pyrolysis products, to prevent environmental hazards from the pyrolysis of OBDC or lees.

Study on environment-friendly disposal and utilization of oil-based drilling cuttings solidified body of shale gas

Large amounts of oil-based drilling cuttings (ODC) will be generated from shale gas exploitation, and the traditional way to deal with it is to solidify the drilling cuttings. There are potential environmental risks associated with this endeavor. So, the safe and environment-friendly disposal and utilization of oil-based drilling cuttings solidified body(ODCSB) were studied. The chemical composition, mineral composition, thermal analysis, radionuclide and other basic physical characteristics of the ODCSB were analyzed by modern test methods. Also, the kiln entry characteristics of the ODCSB were deeply studied, and the raw meal calcination formula of the ODCSB was reasonably designed. The chemical composition, mineral composition and microstructure of the cement clinker obtained are almost the same as those produced by a large cement plant, and the tail gas in the calcination process also meets the requirements of the Chinese standard(GB 30485). In addition, the clinker was used as a raw material to prepare ordinary Portland cement. The results show that the compressive strength, setting time, water requirement of standard consistency, mineral composition and microstructure of ODCSB cement are basically the same as those of cement produced in a large cement plant. It can be seen that the cement prepared by the right amount of ODCSB can meet the relevant requirements of Chinese standard(GB 175). At the same time, the leaching toxicity of heavy metals in the cement was also tested. Results show Cd was not detected, Cr was 50.3 mg/kg, Pb was 44.6 mg/kg, As was 12.8 mg/kg, Ni was 9.1 mg/kg, Hg was 0.11 mg/kg, are lower than the relevant limit requirements in the Chinese standard(GB 30760). In conclusion, the quality and heavy metal content of common Portland cement produced by ODCSB meet the requirements of corresponding standards, and the micro properties of ODCSB cement are also close to the commercially available cement. So, it is an effective way of safe and environment-friendly disposal and utilization of ODCSB.