摘要
本文研究了在温度５００～７００℃，石灰用量α为０．４～１．２，时间３０～１５０ｍｉｎ范围内加石灰焙烧黄铁矿、砷黄铁矿的硫产物。研究发现：在不降低总硫固定率（Ｓｒ）的前提下，可减小ＣａＳ、ＣａＳＯ等有害于氰化浸金的物质生成。最佳焙烧条件；α为０．９～１．０，空气流量为理论量的１．３倍，第一段焙烧温度为５５０～６６０℃，第二段是６００～６５０℃，两段焙烧时间分别为２ｈ。
Within the range of temperature from 500℃ to 700℃, ime consumption α from 0.4 to 1.2,time from 30 to 150min,the sulphides fixed in roasted pyrite or arsenopyrite after roasting by adding lime are studied.It is found that on the premise of no decreasing of toeal fixing rate(St) of sulfide,the generating of sulphides as Cas,Caso3 etc in the roasted pyrite or arsenopyrite which are unfavorable to gold cyaniding can be cut down by such kind roasting.The optimal conditions of such kind roast are that the lime consumption a equal to 0.9￣1. 0, actual air flow is 1.3 times of its theoretical flow,roastins temperature is 550℃￣660℃ in first stage and 600℃￣650℃ in second stage,the time of controlled roast conducted in each stage is the same two hours.
出处
《黄金》
CAS
北大核心
1995年第9期24-28,共5页
Gold
关键词
砷黄铁矿
黄铁矿
难浸金矿
石灰
焙烧
arsenopyrite
pyrite
gold ores being diffcult to be leached: oxidizing roasting by adding lime
phase of sulphide
