Abstract: Calcium fluoride for metallurgical grade fluxing agent is produced by acid leaching-sodium D-gluconate desulfurization process with acid leaching calcium fluoride sludge as raw materials and sodium D-gluconate as desulfurizer.Taking the desulfurization rate of calcium fluoride as main index,the desulfurization conditions are investigated and optimized as follows:the dosage of sodium D-gluconate is 3.5%,stirring rate is 200 r·min-1,reaction temperature is at 40℃ and reaction spends 40 min.Experimental results show that the sulfur content of calcium fluoride sludge drops from 1.209% to 0.046% after desulfurization,and calcium fluoride after further preparation can meet the requirements of fluorite block FL-85 in metallurgical industry standard.
王百年, 陈长铸, 张告时, 邬清臣, 杨保俊. 氟化钙污泥脱硫工艺研究[J]. 现代化工, 2022, 42(4): 182-186,191.
WANG Bai-nian, CHEN Chang-zhu, ZHANG Gao-shi, WU Qing-chen, YANG Bao-jun. Study on desulfurization for calcium fluoride sludge. Modern Chemical Industry, 2022, 42(4): 182-186,191.
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