氧化-硫化焙烧法处理高砷矿物原料的研究

来源期刊：中南大学学报(自然科学版)1998年第3期

论文作者：B．A．鲁甘诺夫 E．H．萨仁 郭炳昆

文章页码：48 - 50

关键词：含金砷精矿;黄铁矿;砷黄铁矿;沸腾焙烧;氧化-硫化焙烧

Key words：arsenic-gold concentrates; pyrite; arsenopyrite; fluidizing bed roasting; oxidizing-sulphidizing roasting

摘    要：对氧化物体系Cu-As-O,Fe-As-O和硫化物体系Cu-As-S,Fe-As-S的热力学分析表明,热力学稳定的砷化物为Cu₃As,Cu₃(AsO₄)₂,FeAs₂,FeAsO₄.当有硫化剂存在时,在弱氧化气氛下进行氧化-硫化焙烧,将有利于FeAsS分解,并生成毒性低的砷硫化物.分别在含金砷精矿和含砷铜精矿中添加黄铁矿进行沸腾焙烧工艺试验,砷的挥发率都在85%以上,试验结果对高砷矿物原料脱砷工艺具有应用价值.

Abstract: The thermodynamical analysis of oxide systems (Cu-As-O,Fe-As-O) and sulphide systems (Cu-As-S,Fe-As-S) indicates that Cu₃As, Cu₃(AsO₄)₂, FeAs₂ and FeAsO₄ are thermodynamically stable. If sulphide reagents exist, oxidizing-sulphidizing roasting in weak oxidizing atmosphere will benefit FeAsS to decompose and low poison arsenic-sulphur compound will form. When pyrites are added to arsenic-gold concentrates and arsenic-copper concentrates respectively and roasted in fluidizing bed, the volatilization rate of arsenic is above 85%. The experimental results are valuable for removal of arsenic from high arsenic minerals.