利用化工冶金联合体的工艺废料制备硅酸盐水泥用石膏硬石膏

A. Ponomarenko
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引用次数: 0

摘要

对生产氟化氢和炼钢的废渣氟硬石膏和炼钢渣的组成和性能进行了测定。确定了目前产量的氟硬石膏不符合生产硅酸盐水泥对原料的要求。为此,为了提高氟硬石膏的工艺性能和消费性能(增加CaSO4·2H2O的用量和中和H2SO4),对其进行了炼钢渣调质工艺研究。研究发现,硫酸通过毛细的传质系数和渣中和硫酸的程度取决于氟硬石膏的分散性、孔隙率和初始酸度。最有效的硫酸结合发生在引入化学计量量的炉渣,氟硬石膏颗粒的大小可达20毫米,处理时间为60分钟。经渣处理的氟硬石膏在空气湿润条件下贮存12小时后,其颗粒强度、二水石膏量及毒理学性能均满足要求。关键词:工艺石膏,炼渣,中和,调理,石膏石,硅酸盐水泥
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Obtaining of Granulated Gypsum Anhydrite on the Basis of Technogenic Wastes of Chemical and Metallurgical Complex for Use in Portland Cement Production
The composition and properties of fluorine–anhydrite and steel–refining slag which are wastes of production of hydrogen fluoride and steel were determined. It is established that fluorine–anhydrite of the current output does not meet the requirements to materials for the production of Portland cement. Therefore to improve the technical and consumer properties of fluorine-anhydrite (for increasing the amount of CaSO4 ⋅2H2O and neutralization of H2SO4) the studies of its’ conditioning processes with steel– refining slag were carried out. It was found that the mass transfer coefficient of sulfuric acid through the capillary and the degree of its neutralization by slag depend on the dispersion of fluorine–anhydrite, its porosity and initial acidity. The most effective binding of sulfuric acid occurs with the introduction of slag in stoichiometric amounts, the size of fluorine–anhydrite granules up to 20 mm and a processing time of 60 minutes. After storage in air-humid conditions for 12 hours of fluorine–anhydrite treated with slag the strength of its granules, the amount of dihydrate gypsum and toxicological properties meet the requirements. Keywords: techno–gypsum, refining slag, neutralization, conditioning, gypsum stone, Portland cement
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