以酸浸氟化钙污泥为原料、D-葡萄糖酸钠为脱硫剂,采用酸浸-D-葡萄糖酸钠脱硫工艺制备冶金级助熔剂氟化钙,并以氟化钙脱硫率为考察指标,考察并确定了较佳的脱硫工艺条件:D-葡萄糖酸钠添加质量分数为3.5%、搅拌速率为 200 r/min、反应温度为40℃、反应时间为40 min。研究表明,氟化钙污泥经脱硫处理后硫的质量分数从1.209%降低到了0.046%,由此进一步制备的氟化钙主要技术指标均符合冶金行业标准中萤石块矿FL-85的要求。

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(1973-),男,博士,副教授,研究方向为非金属矿产和大宗城市矿产资源综合利用,284855884@163.com