浮选矿浆中黑药测试方法的研究

THE ANALYSIS METHODS OF AEROFLOAT IN THE SULPHIDE PULPS

通过亚铁灵比色法影响因素、矿浆转化条件的研究以及溶液化学的计算，改进了矿浆中黑药的测试方法．指出硝基苯与三氯甲烷都是亚铁灵试剂与金属离子对的有效萃取剂，最大吸收峰分别在５１４，５１９ｎｍ处；前者比后者草取能力更强；试料中硫离子浓度为１０－６～１０－２ｍｏｌ／Ｌ时，ｐＨ值应控制在２．５～６．０之间；矿浆试样必须首先用硫化钠转化后再萑萃取比色，以达到测试准确；黑药测定的浓度范围为１～７０ｍｇ／Ｌ．

The analysis methods of aerofloat in the sulphide pulps were improved through investi-gating the affecting faetors of ferroin colorimetric analysis, the changing conditions of sul-phide pulps and the solution chemical calculations. It was ascertained that nitrobenzen andtricchloromethane were efficient extractants for ionpair of ferrion and aerofloat,and the ut-most absorbtion peakes occured at 514 nm, 519 nm, respectively. The former had strongerextractability than the latter; when the sulphide ions content in sample was 10-6～10-2 mol/L, the pH value of the sample should be controlled in the range of 2.5～6; the pulp shouldbe changed by sodium sulphide before extraction; the analysable range of aerofloat was 1～70 mg/L.