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Analysis of manganese manganese slag forms and their impact on the environment . The results show that a manganese plant manganese slag mainly water-soluble manganese in the manganese ion , manganese carbonate, manganese dioxide and salt form, wherein the water soluble manganese ions about 50% of the total manganese , maximum precipitation amount up to 3.7mg / ml, far exceeding the national emission standards ; manganese slag leaching solution pH of around 5 , acidic manganese slag which , if discharged directly , it will cause serious pollution of the surrounding environment . Determined by orthogonal experimental treatment with sulfuric acid leaching manganese slag back The optimum conditions were: liquid ratio 1:3 , 20% sulfuric acid concentration , leaching temperature of 90 ℃, leaching time 3h, the highest leaching rate of manganese up to 96% ; impurity by -step method, to a purity of 91% manganese sulfate products. Take a single factor analysis method using ammonium manganese slag processing roasting roasting conditions on the leaching rate of manganese slag to determine its optimum calcination conditions: ammonium ore ratio of 1:1, roasting time is 1h, roasting temperature of 450 ℃, the highest manganese leaching rate 83% , 98% can be obtained through the impurity manganese sulfate products. The process of the two methods and environmental benefits are analyzed and compared , from the process perspective, roasting with salt Preparation manganese slag is more appropriate. Different methods in the analysis of the residue remaining after treatment composition , based on the choice of the specific surface area larger roasting ammonium copper slag were processed wastewater. The results show that under normal temperature conditions in the laboratory for copper ion concentration 60mg / L wastewater , when manganese slag dosage of 1.5g, at pH 6, the reaction time is 2.5h conditions, manganese slag copper ions best adsorption , the adsorption rate of up to 96%.
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