Sulfuric Acid Leaching Research Articles

Simultaneous extraction of uranium and niobium from a low-grade natural betafite ore

Abstract This work efficiently investigated the simultaneous extraction of uranium (U) and niobium (Nb) from a low-grade natural betafite ore by using novel technique, namely, sulfatizing roasting coupled to sulfuric acid leaching process. First, the sulfatizing roasting was adopted to alert the properties of the raw ore, aiming to destroy the crystal structure of the ores and convert the valuable elements to soluble sulfate compounds. Moreover, the influences of the parameters affecting the sulfatizing roasting including roasting temperature, amount of sulfuric acid, and roasting time were studied. The results indicated that the extraction of U and Nb from the ores with sulfatizing roasting was an order of magnitude higher than the extraction of U and Nb from the ores without roasting under the same test conditions. Then, the effects of amount of sulfuric acid concentration, liquid–solid ratio, leaching temperature, and leaching time on U and Nb recoveries were systematically investigated. To verify the process parameters of extracting U and Nb for the novel technique, three validating tests were conducted, and the results showed that over 95% of U and 85% of Nb were leached out under the optimal conditions. The novel technique was proven as advantageous since it conspicuously improved the leaching rates of U and Nb and promoted the refractory natural betafite ores to become an economic source for uranium.

Some Results of the Study on the Processing of Spent Vanadium Catalysts

Studies on the extraction of vanadium(V) oxide from spent vanadium catalysts by sulfate and soda-alkaline leaching were carried out at OJSC Maksam-Chirchik and OJSC AGMK. The extraction method of vanadium compounds from spent vanadium catalysts was presented. The feasibility of extracting vanadium from spent catalysts by sulfuric acid leaching followed by treatment with an ammonia solution was confirmed.

A novel sequential leaching process for titanium slag to increase TiO2 grade to prepare boiling chlorinated charges

The efficient removal of calcium and magnesium impurities from titanium slag to prepare a boiling chlorinated charge is one of the technical bottlenecks in producing high-end titanium products from titanium resources in Panxi. This work proposes a novel process to prepare boiling chlorinated charges from the modified titanium slag, which includes sulfuric acid leaching, hydrochloric acid leaching, and removing silica from the hydrochloric acid leach residue. The transformation of phases, change in microstructure and the leaching efficiency of elements during the combined process were systematically investigated. The mixture of MxTi3-xO5 and diopside (CaMgSi2O6) can be decomposed by sulfuric acid into water-soluble sulfates (titanyl sulfate TiOSO4 and iron sulfates). The leaching efficiencies of Fe, Ca, Mg, V, and Si, respectively, were 85.9%, 48.6%, 93.0%, 95.9%, and 69.2% at the process parameters used: 250 °C, liquid/solid ratio of 1.7:1, leaching time of 2 h, and the particle size 74 μm. The sulfuric acid leach residue was washed and leached in hydrochloric acid. The hydrochloric acid leaching efficiencies of Fe, Ca, Mg, V and Si reached 72.0%, 75.4%, 70.4%, 67.9%, and 58.7%, respectively, in a 15% HClsolution at a liquid/solid ratio of 8, and leaching time of 2 h at 140 °C. The NH4HF2 leaching step is necessary to remove silica for the preparation of boiling chlorinated charges. The product obtained in this combined process contains TiO2 (98.8%), SiO2 (0.17%), and CaO and MgO (0.47%), which meets the requirements of the chemical compositions for boiling chlorinated charge.

Investigation of the process of leaching copper from copper-containing dumps using bio-oxidants

The paper presents the results of experiments on bulk copper leaching with preliminary bacterial oxidation of initial ore. As a culture of bio-oxidant, we used A.ferrooxidans. Studies on the adaptation and cultivation of a technologically efficient strain of A.ferrooxidans have been carried out. As an alternative chemical oxidizer, the use of trichloroisocyanuric acid (THCC) was considered. Standard sulfuric acid leaching served as a control option. As a result of the application of the chemical oxidation method using THCC, an increase in the extraction of copper into solution compared to other options was observed only during the first 10 days. As a result, over 30 days of leaching, the copper recovery rate was 52,83%. During the same period, 62,17% of copper was extracted by standard sulfuric acid leaching. The greatest efficiency was observed in the variant of preliminary bacterial oxidation. During 30 days of leaching, 76,08% of copper was extracted into the productive solution. At the electrolysis stage, 30,8 g of copper was deposited on the cathode from the accumulated electrolyte solutions, which gives a current recovery equal to 94,6%.

МИРОВЫЕ ТЕНДЕНЦИИ РАЗВИТИЯ ТЕХНОЛОГИЙ ГИДРОМЕТАЛЛУРГИЧЕСКОЙ ПЕРЕРАБОТКИ НИКЕЛЕВЫХ РУД НА ДЕЙСТВУЮЩИХ ПРЕДПРИЯТИЯХ

The paper provides a critical analysis of sources, a generalization of factual and theoretical material on the main hydromet-allurgical technologies for processing nickel ores. It has been established that the use of autoclave leaching of ores is the most common method of processing. This process takes place mainly in capacitive reactors with a stirrer. It was found that, depending on the type of ore, there are two main ways to carry out autoclave leaching: acid leaching under high pressure and the Caron process (ammonia leaching during roasting). The review shows that sulfuric acid leaching is predominantly used in Cuba and Western Australia, as well as in Finland, South Africa and Canada. Nitric acid leaching is being used in pilot plants in Australia at the CSIRO facility. Chlorine leaching is used in Japan, Norway, France and Canada. Ammonia processes have been implemented in Cuba, the Czech Republic and Australia, as well as in Brazil, Canada and the Philippines, India and Gag Island in Indonesia. The article presents the latest achievements in the field of extraction of nickel and cobalt from productive solutions, as well as the advantages and disadvantages of existing schemes at operating enterprises in the world. Having analyzed the main technologies for processing nickel ore, we can say that traditionally Ni and Co are extracted from productive solutions after leaching in one of three ways: 1. Precipitation of mixed nickel and cobalt sulfide; 2. Precipitation of mixed nickel and cobalt hydroxide; 3. Direct solvent extraction. The analysis showed that the most optimal and least time-consuming process, providing a relatively high degree of extraction of target metals, is extraction. Impurity removal is most expediently carried out by precipitation, however, the loss of nickel and cobalt should be taken into account.

Extraction of alumina and silica from high-silica bauxite by sintering with sodium carbonate followed by two-step leaching with water and sulfuric acid.

Efficient utilization of high-silica bauxite and minimization of bauxite residue are of great significance for the sustainable development of the alumina industry. In this paper, a novel process is proposed to extract Al2O3 and SiO2 from high-silica bauxite without residue discharge, that is, sintering bauxite with Na2CO3 followed by two-step leaching with water and sulfuric acid. The effects of the sintering parameters on the process were investigated, and the phase transformations during sintering and leaching were revealed by using phase diagram, thermogravimetric analysis (TGA) and differential scanning calorimetric (DSC), X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS) methods. When the mixture of the high-silica bauxite and Na2CO3 with mole ratio of Na2O/(Al2O3 + SiO2) of 1 was sintered at 950 °C for 30 min, diaspore and kaolinite were primarily converted into Na1.95Al1.95Si0.05O4 and an amorphous phase, respectively. In the water leaching process, Na1.95Al1.95Si0.05O4 was dissolved while the amorphous phase underwent some transformations to form the water leaching residue, resulting in ∼84% of Al2O3 being extracted for alumina production. In the sulfuric acid leaching process, the amorphous phase in the water leaching residue dissolved, resulting in ∼13% of Al2O3 and ∼86% of SiO2 being extracted for the production of polyaluminium ferric sulfate (PAFS) and silica gel, respectively. The silica gel had a high purity, containing more than 88% of SiO2 after drying.

Study on properties of zinc ferrite, titanium dioxide and their composites

In this paper, the methods of sulfuric acid leaching and chemical coprecipitation were used to prepare products such as purified zinc ferrite, synthetic zinc ferrite, synthetic titanium dioxide and its complex with purified zinc ferrite. The morphology and microstructure of the above samples were characterized and analyzed by XRD and SEM. The results showed that the purified zinc ferrite contained a small amount of ZnO, SiO2, Al2O3 and PbSO4. Its particle size was the largest and the crystallinity was the best, but the surface was not smooth, the particle size distribution was not uniform and there was agglomeration phenomenon. The purchased zinc ferrite had high purity, the smallest particle size and the worst crystallinity. Its surface was smooth, particle size distribution was uniform, and it was loose and porous. The synthetic zinc ferrite had high purity, smooth surface, uniform particle size distribution and obvious agglomeration. The prepared titanium dioxide had no other impurities, good crystallinity, smooth surface and certain agglomeration phenomenon. For the zinc ferrite/titanium dioxide composite, adding a small amount of purified zinc ferrite would change the crystallinity of titanium dioxide, but it had little effect on the grain size of titanium dioxide. The surface was rough, the particle size distribution was not uniform, and there was agglomeration phenomenon.

Research of characterization of zinc ferrite, titanium dioxide and their composites

In this paper, zinc calcines, sulfuric acid, ferric nitrate nine-hydrate, zinc nitrate hexahydrate, titanium oxide sulfate, sodium hydroxide and ammonia water were selected as raw materials, and the methods of sulfuric acid leaching and chemical coprecipitation were used to prepare purified zinc ferrite, synthetic zinc ferrite, synthetic titanium dioxide and its composite with purified zinc ferrite. And characterized by BET, UVVis and FTIR. The results showed that: SO42- existed in purified zinc ferrite. Purified zinc ferrite, synthetic zinc ferrite and purchased had different specific surface area, pore volume and average pore size. The specific surface area of synthetic zinc ferrite decreased with the increase of calcination temperature. The three kinds of zinc ferrite had good absorption of ultraviolet light and visible light. Purchased ferric acid had the strongest absorption of UV light and synthetic zinc ferrite had the strongest absorption of visible light, and purified zinc ferrite had the absorption of UV light and visible light between the two. The specific surface area of titanium dioxide prepared by chemical coprecipitation method was greatly affected by calcination temperature. With the increase of calcination temperature, the specific surface area decreased from 123.633 to 28.036m2·g-1, and the average pore diameter was less affected by calcination temperature. For the zinc ferrite/titanium dioxide composite prepared by chemical coprecipitation method, a certain amount of purified zinc ferrite was added to facilitate the absorption of visible light by titanium dioxide.

Проведение испытаний сернокислотного способа выщелачивания отвального шлака акционерного общества «Кольская горно- металлургическая компания» в непрерывном режиме

An environmentally safe method of sulfuric acid leaching of waste slag of copper-nickel production, has been tested. The possibility of carrying out the process in a continuous mode with the subsequent production of silicon dioxide from a solution with a high specific surface area, is shown.

Extraction of Molybdenum and Uranium from Low-Grade Molybdenum Bearing Ore Containing Uranium through Mechanical Activation Following Acid Leaching

ABSTRACT Extraction of molybdenum (Mo) from jordisite is difficult due to the amorphous state of MoS2. In this study, mechanical activation was employed to pretreat this type of ore with a low Mo content of 0.26%, and then molybdenum and uranium were both extracted from the milled ore using sulfuric acid. The effects of milling time, oxidant, and optimal leaching conditions were investigated in the laboratory. The results show that the mechanical activation will reduce the particle size and increase the specific surface area of the ore under certain milling conditions. Mechanical activation without oxidants in a hypoxia environment is not conductive to the recovery of molybdenum. When the oxidant of MnO2 is added during the milling process, the Mo recovery will increase greatly. The effect of mechanical activation on U recovery is not so obvious. The phenomenon of agglomerate will occur during the milling process, which will reduce Mo recovery seriously, especially when the milling time is more than 120 min. The Mo and U recovery can reach 84.52% and 61.39%, respectively, after optimization of sulfuric acid leaching process conditions.

Innovative application of two-stage sulfuric acid leaching for efficient recovery of Ti from titanium-bearing electric furnace slag

A two-stage sulfuric acid leaching process was developed to efficiently recover Ti from a titanium-bearing electric furnace slag (TEFS) made from V-Ti magnetite, which has a high content of impurities and low Ti content. The efficiency of the recovery mechanism was investigated. Anosovite and gangue minerals in the TEFS reacted with sulfuric acid and generated several solid substances such as TiOSO4, CaSO4, sulfates of Mg and Al, and silicate in the first-stage of the acidolysis, which formed the product layer and hindered the diffusion of sulfuric acid. Moreover, a high content of the impurities caused the gangue minerals to closely wrap around the anosovite, which hindered the acidolysis. By adopting a two-stage acid-leaching process, soluble sulfates, which are the most abundant product of acidolysis, were dissolved in water during the first-stage of the water leaching, which exposed the unreacted anosovite, diopside, and spinel. Accordingly, sulfuric acid completely reacted with the unreacted minerals during the second-stage acidolysis. The Si- and Ca-containing products of the acidolysis mainly existed in the form of silicate and CaSO4 and were later converted to silica gel and gypsum, respectively, after the second-stage water leaching. With this innovative process, the leaching rate of Ti improved significantly, achieving a 99.33% total leaching rate. Moreover, lowering the initial sulfuric acid concentration to 48% still yielded a total leaching rate of 98.04%, with the Ti grade of the final residue dropped to 3.14%.

Clean process for vanadium extraction from vanadium-bearing converter slag

The clean extraction of vanadium from vanadium-bearing converter slag (VBCS) has important implications for the sustainable development of the vanadium industry. In this work, a process that included sieving, nonsalt roasting, and sulfuric acid leaching was carried out to extract vanadium from VBCS. First, through sieving, large particles of metallic iron were removed and vanadium with particle sizes of less than 150 µm was preliminarily enriched. Subsequently, the nonsalt roasting process was investigated in terms of the effects of temperature and time and the phase transformation mechanism. The structures of vanadium ferrospinel and fayalite were destroyed completely after roasting at 900 °C for 1.5 h, and vanadate, Fe2O3, SiO2, and Fe2TiO5 formed in the roasted product. Finally, the systematic sulfuric acid leaching experiment demonstrated that over 97% of vanadium was extracted under optimal conditions. Meanwhile, the phase analysis of the leaching residue confirmed that vanadate was selectively leached into the solution.

Effect of Fluoride Ions on the Surface Dissolution of Vanadium-Bearing Biotite

In shale vanadium ore, vanadium is mainly formed as a low-V(III) homogeneous phase to partially replace Si and exists in the lattice structure of aluminosilicate minerals such as biotite. During the acid leaching of shale vanadium ore, an activator is needed to effectively extract vanadium. Using biotite as a tetrahedral structure doped with Aluminum-Silicon tetrahedron structure, the interaction between leaching-agent ions (H+), activator ions (F−), and vanadium-containing biotite surface was discussed by DFT quantum chemical calculations. The dissolution behavior of activator fluoride ions on the surface of vanadium-bearing biotite during sulfuric acid leaching was revealed. According to the simulated leaching results, the oxygen on the biotite surface first absorbed hydrogen ions to undergo complete hydroxylation, and then combined with hydrogen ions to form water molecules. However, in the presence of activator (NaF), fluoride ions were adsorbed on the surface cations, which catalyzed the formation of water molecules and promoted the dissolution of surface cations. SEM–EDS analysis showed that the surface of vanadium-bearing minerals became very irregular, and the number of voids and cracks greatly increased. At the same time, XPS showed that the addition of activator fluoride ions destroyed the Al-O tetrahedron structure. Many Al and V atoms dissolved in the solution, which improved the leaching rate of vanadium.

Study of Forms of Compounds of Vanadium and Other Elements in Samples of Pyrometallurgical Enrichment of Ash from Burning Oil Combustion at Thermal Power Plants.

The results of the processing of ash from the combustion of fuel oil after roasting with the addition of Na2CO3 followed by aluminothermic melting are presented. As a result, metallic nickel and vanadium slag were obtained. Studies of slag, metal, and deposits on the electrode were carried out. The resulting metal contains about 90 wt% Ni. The main phases of scurf on the electrode are a solid solution based on periclase (Mg1-x-y-zNixFeyVzO), sodium-magnesium vanadate (NaMg4(VO4)3), and substituted forsterite (Mg2-x-yFexNiySiO4). The processing of ash made it possible to significantly increase the concentration of vanadium and convert it into more soluble compounds. Vanadium amount increased from 16.2 in ash to 41.4-48.1 V2O5 wt% in slag. The solubility of vanadium was studied during aqueous leaching and in solutions of H2SO4 and Na2CO3. The highest solubility of vanadium was seen in H2SO4 solutions. The degree of extraction of vanadium into the solution during sulfuric acid leaching of ash was 18.9%. In slag, this figure increased to 72.3-96.2%. In the ash sample, vanadium was found in the form of V5+, V4+ compounds, vanadium oxides VO2 (V4+), V2O5 (V5+), and V6O13, and nickel orthovanadate Ni3(VO4)2 (V5+) was found in it. In the slag sample, vanadium was in the form of compounds V5+, V4+, V3+, and V(0÷3)+; V5+ was presented in the form of compounds vanadate NaMg4(VO4)3, NaVO3, and CaxMgyNaz(VO4)6; V3+ was present in spinel (FeV2O4) and substituted karelianite (V2-x-y-zFexAlyCrzO3). In the obtained slag samples, soluble forms of vanadium are due to the presence of sodium metavanadate (NaVO3), a phase with the structure of granate CaxMgyNaz(VO4)6 and (possibly) substituted karelianite (V2-x-y-zFexAlyCrzO3). In addition, spinel phases of the MgAl2O4 type beta-alumina (NaAl11O17), nepheline (Na4-xKxAl4Si4O16), and lepidocrocite (FeOOH) were found in the slag samples.

Mathematical modeling of sulfuric acid leaching of pyrite cinders after preliminary chemical activation

Pyrite cinders, waste products of pyrite concentrate processing by firing to produce sulfuric acid, can serve as raw materials for the extraction of precious, ferrous, and non-ferrous metals. The paper considers the possibilities of obtaining non-ferrous metal concentrate from pyrite cinders by sulfuric acid leaching. This operation is one of the stages in the integrated technology. To increase the extraction of non-ferrous metals during leaching, the method of preliminary chemical activation was used. Chemical activation was carried out in a solution containing 40-120 g/dm3 NaНCO3 at temperatures of 90-230 ° C and a duration of 30-300 minutes. Sulfuric acid leaching of pyrite cinder after activation was carried out in H2SO4 solutions with a concentration of 5-20 % at a temperature of 60 ° C, duration of 30 minutes, and pulp density of 33 %. To determine the optimal conditions for the sulfuric acid leaching of pyrite cinders, a mathematical planning method was used, which allows to assess with a high degree of reliability the influence of the main factors (temperature, pulp density, the concentration of the solution NaHCO3 and duration) and predict an increase in the efficiency of the process by analyzing the numerical values of the regression equations. As a result of sulfuric acid leaching of pyrite cinders after preliminary chemical activation under optimal conditions determined by a mathematical model, the extraction of iron and non-ferrous metals into a solution is 10-15% higher than without activation.

A Multifocal Study Investigation of Pyrolyzed Printed Circuit Board Leaching

Electric waste from numerous devices that are put out of use every day has some form of printed circuit board that contains precious and valuable metals in their components. In order to extract these metals, the printed circuit boards were crushed and pyrolyzed into powder. The fine pyrolyzed printed circuit board (PPCB) powder was separated into fractions, and the fine metallic fraction was used as a raw material for metal leaching extraction. In order to better understand how various metal species react in leaching media, several leaching agents were used (sulfuric acid, nitric acid, glycine, and acid mine drainage-AMD) alone, and with the addition of hydrogen peroxide. Additionally, the influence of the S/L ratio and leaching temperature were investigated in sulfuric acid leaching solutions, as this is the one most widely used. In one case, the reactor was heated in a thermal bath, while in the other, it was heated in an ultrasonic bath. Lastly, several experiments were conducted with a (consecutive) two-pronged leaching approach, with and without applied pretreatment. The aim of this paper is to give a multifocal and detailed approach to how metals such as Al, Cu, Co, Zn, Sn, and Ca behave when extracted from fine PPCB powder. However, some attention is given to Nd, Pd, Pb, and Ba as well. One of the main findings is that regardless of the pretreatment or the sequence of leaching media applied, consecutive two-pronged leaching cannot be used for selective metal extraction. However, AMD was found to be suitable for selective leaching with very limited applications.

Recovery of tungsten and titanium from spent SCR catalyst by sulfuric acid leaching process

The widespread use of selective catalytic reduction (SCR) catalysts has resulted in a large accumulation of spent SCR catalysts. These spent catalysts present a significant risk of environmental hazards and potential for resource recovery. This paper presents a feasible process, which works using atmospheric pressure leaching, of tungsten and titanium recovery from spent SCR catalysts. In this new method, titanium and tungsten are simultaneously leached with sulfuric acid as the leaching agent. After hydrolysis and calcination, titanium-tungsten powder with low impurity and reconstructed pore properties was obtained. The optimal conditions for the leaching of Ti and W were as follows: temperature, 150 °C; reaction time, 60 min; H2SO4 concentration, 80 %; mass ratio of H2SO4/TiO2, 3:1; and diluted H2SO4 concentration, 20 % after reaction. With these optimum conditions, the leaching efficiency of Ti and W were found to be 95.92 % and 93.83 %, respectively. The ion speciation and reaction mechanism of W were studied by Raman spectroscopy, FTIR, and UV–vis. The formation of heteropolytungstate with a Keggin structure is essential for the synergistic leaching of Ti and W, as the heteropolytungstate can be stably dissolved in the acid solution. During the hydrolysis process, heteropolytungstate gradually decomposed into Ti4+ and WO42− due to the formation of insoluble Ti(OH)4 from Ti4+ in the solution. This study demonstrated an effective method for synergistic recovery of titanium and tungsten from the spent SCR catalyst.

Leaching of arsenic from flue gas desulphurisation gypsum using ultrasound-enhanced sulfuric acid

The flue gas desulphurisation gypsum (FGDG) produced in nonferrous metal metallurgy industry is defined as hazardous waste because of its arsenic content. In this study, a new process for arsenic removal by ultrasound-enhanced sulfuric acid leaching was developed. The leaching characteristics of arsenic under ultrasound-enhanced leaching and conventional leaching conditions were compared. Furthermore, the results indicated that under the optimal experimental conditions, the leaching efficiency of arsenic in ultrasound-enhanced leaching was 97.07%, while that in conventional leaching was only 79.67%. The leaching kinetic data further proved that the leaching rate of arsenic is controlled by the diffusion process in the ultrasound-enhanced sulfuric acid leaching system, and the activation energy of the reaction is 13.38 kJ mol−1. On the basis of optimization of leaching process parameters, the reaction mechanism of the leaching process was studied by X-ray diffraction, X-ray photoelectron spectroscopy, Electron probe X-ray microanalyser, and scanning electron microscopy. The results of the toxicity assessment indicated that FGDG treated with ultrasound-enhanced sulfuric acid was no longer a solid hazardous waste, which is of great significance for its efficient utilization.

Recovery of arsenic oxide, harmless gypsum residue and clean water by lime neutralization and precipitation

The nonferrous metal smelting industry-an influential industry in China- produces a large quantity of arsenic-containing acidic wastewater (ACAW) that seriously hinders the development of the industry. In this study, low-cost and effective methods for treating acidic wastewater were systematically examined. Lime neutralization and compound salt precipitation were used to remove arsenic (As) from acidic wastewater. The residues produced during neutralization and compound salt precipitation were treated harmlessly by H2SO4 leaching, and As2O3 was recovered from the sulfuric acid leach solution (ALS). The results showed that the appropriate pH for the neutralization process was 3. The arsenic concentration in the solution after compound salt precipitation was <0.5 mg/L at pH 8.5 and suitable molar ratios (Cu/As: 0.45 to 2.3, Fe/As: 1.20 to 6.0, and Zn/As: 1.20 to 6.0). After acid leaching of residues obtained during neutralization and compound salt precipitation, the content of CaSO4 in the leach residue reached the specified value (CaSO4 ≥ 75 wt%) of industrial byproduct gypsum (GB/T 21371–2019 of China), and the concentration of arsenic in the toxicity leaching experiment was <5 mg/L. The ALS was reduced by SO2 to recover arsenic trioxide, and the recovery of arsenic reached 96.5%. Compared to the NaOH neutralization reagent, the lime treatment process is cost-effective and produces non-hazardous solid waste.

Flotation separation of titanite concentrate from apatite-nepheline-titanite ores of anomalous zones of the Khibiny deposits

Titanium raw materials are widely used for the synthesis of various functional materials – sorbents of radionuclides and rare earth elements, various additives, filler pigments, etc. Since most of titanium concentrates are imported, in line with the import substitution program, production of titanite concentrate from apatite-nepheline ores of the Khibiny deposits is a promising trend for supplying national industry with titanium raw materials. The article presents the results of laboratory studies of flotation separation of titanite concentrate from apatite-nepheline-titanite ores extracted from the upper ore horizon of the Koashvinskoye deposit, where titanite-enriched ores are concentrated. Recovery of titanite concentrate was accomplished using two reagent modes – a mixture of alkyl hydroxamic and carboxylic acids with the addition of distilled tall oil and a mixture of tall oils with the addition of polyalkyl benzene sulfonic acids. The results of the research showed that the first flotation mode, which allows a selective recovery of titanite into the concentrate (titanite content in the concentrate was 93.5 %) is the most efficient. It was shown that flotation separation of titanite concentrate is preferable compared to the chemical method based on sulfuric acid leaching.