Abstract
Magnetization technology has been widely used in various transportation pipeline anti-scaling and descaling processes due to its simple equipment, low operating cost and low secondary pollution. To resolve structural pipeline issues in concentrations, the effects of magnesium salt concentration on conductivity, pH value and calcium ion concentration of a magnetized calcium chloride sodium bicarbonate mixed solution were studied. The results indicated that 4.0% MgSO4 had the greatest anti-scaling effect under dynamic water conditions, which increased the calcium concentration of the mixed solution by 5.93%. Furthermore, the synergistic effects of 5.0% magnesium carbonate on the scaling of calcium carbonate were the largest, which reduced the calcium concentration of the mixed solution by 22.19%. Scanning electron microscope (SEM) and Raman spectra showed that magnesium carbonate reduced the effects of magnetization because it inhibited the formation of vaterite-type calcium carbonate and promoted the formation of calcite-type calcium carbonate. Magnesium sulfate can improve the anti-scaling effects of magnetization because it promotes the formation of vaterite calcium carbonate with high solubility. The results of this study can provide a theoretical basis for the scaling process and dissolution behavior regulation of calcium carbonate and have an important reference significance for scale prevention and scale removal in concentrator pipelines.
Highlights
In the industrial production of concentrators, due to the long-term use of dynamic water rich in calcium and magnesium ions such as lime, scaling is a common occurrence in heat exchange equipment, cooling water systems and several types of transmission pipelines [1]
Raman spectra showed that magnesium carbonate reduced the effects of magnetization because it inhibited the formation of vaterite-type calcium carbonate and promoted the formation of calcite-type calcium carbonate
The dried powder sample was evenly coated on the conductive adhesive, the crystal morphology was observed by scanning electron microscope after spraying gold and the element types and relative atomic content on the sample surface were analyzed by EDS
Summary
In the industrial production of concentrators, due to the long-term use of dynamic water rich in calcium and magnesium ions such as lime, scaling is a common occurrence in heat exchange equipment, cooling water systems and several types of transmission pipelines [1]. This type of scaling phenomenon can cause pipe wall corrosion, pipe blockage and slurry transportation problems, affecting the mineral separation process, safe operation of the concentrator and economic benefits. This study can provide a theoretical basis for scale prevention and descaling of slurry pipelines in concentrators and offer a reference for the application of magnetization technology in different fields
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