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东鞍山选矿厂的浮选过程,加入氧化石腊皂、塔尔油皂等药剂,造成其精矿脱水过滤困难,溢流中金属流失大,滤饼水分一般都在12%以上。我们对浮选精矿矿浆进行添加助剂的过滤试验,取得良好效果。(一)试验方法在实验室中用氧化石腊皂、塔尔油浮选-200目占91.4%的东鞍山矿石,得到pH值8～9的精矿矿浆。把其移入浮选槽,在不断搅拌的情况下加入助剂后,倾入φ100毫米布氏漏斗过滤。过滤的操作条件是:矿浆固体含量25～30%,真空度400毫米汞柱,温度30℃。(二)试验结果试验结果表明,向矿浆中加入硫酸、硫酸亚铁、氯化钙、二氧化碳均能使过滤速度加快,滤饼含水率下降到12%以下。1.硫酸用量为每吨精矿0.813公斤时,滤饼水分为11.39%。2.硫酸亚铁用量为每吨精矿1.9公斤左右时,滤饼水分也可达到12%以下。3.氯化钙用量为每吨精矿2.5公斤时,滤饼
The process of flotation at Dong'anshan Concentrator added oxidized wax soap, tar oil soap and other chemicals, resulting in difficulty in dehydration and filtration of the concentrate, large metal loss in overflow, and the water content of filter cake generally above 12%. We flotation concentrate slurry additives to filter test, and achieved good results. (A) Test Method In the laboratory with oxidized wax soap, Tar oil flotation - 200 mesh accounted for 91.4% of the Dong Anshan ore, obtained pH 8 ~ 9 concentrate ore. Move it into the flotation tank and add the aids under constant stirring. Pour into a φ100 mm Buchner funnel and filter. Filtering operating conditions are: pulp solids content of 25 to 30%, the degree of vacuum 400 mm Hg, temperature 30 ℃. (B) test results The test results show that the addition of sulfuric acid, ferrous sulfate, calcium chloride, carbon dioxide to the pulp can make the filtration speed, filter cake moisture content dropped to below 12%. 1. The amount of sulfuric acid per ton of concentrate 0.813 kg, the filter cake moisture 11.39%. 2. Ferrous sulfate dosage of 1.9 kg per ton of concentrate, the filter cake moisture can reach 12% or less. 3. Calcium chloride dosage of 2.5 kg per ton of concentrate, the filter cake