循环流态化固硫固砷焙烧金矿的试验及应用实践  

EXPERIMENT AND APPLICATION OF SULFUR AND ARSENIC STABILIZATION BY CIRCULATING FLUID BED ROASTING OF ARSENIC-BEARING GOLD ORES

作　　者：李云[1] 刘洪晓 张立征 靳冉功 王云[1] 

机构地区：[1]北京矿冶研究总院,北京100160 [2]新疆星塔矿业有限公司,新疆托里834500 [3]招金矿业股份有限公司,山东招远265400

出　　处：《矿冶》2016年第4期29-32,共4页Mining And Metallurgy

基　　金："十二五"国家科技支撑计划项目(2012BAB08B04);国土资源部公益性行业科研专项(201211069-02)

摘　　要：采用循环流态化固硫固砷焙烧金矿的结果表明,对低硫精矿在650℃焙烧条件下,添加氧化钙达到精矿中硫砷反应的计量点,即ω(Ca O/精矿)=0.12时,固硫率达到75.5%、固砷率达到95.3%;同样,对碱性脉石含量较高的原生金矿,在700℃焙烧条件下,固硫率达到59.4%,固砷率达到82.3%;相应的焙砂进行氰化浸出,其金的浸出率达到最大。循环流态化焙烧强化了焙烧固硫固砷反应,在精矿与原生金矿的焙烧过程中较好地实现了自洁生产。Arsenic-bearing gold ores was preheated by circulating fluid bed（CFB） roaster, while arsenic and sulfur in the gold ores was fixed in calcine. The result shown that the S stabilization efficiency was 75.5% and As stabilization efficiency was 95.3% for the low-sulfur gold concentrate roasting at 650℃ , while adding CaO to con- centrate with to（CaO/Concentrate） = 0. 12 during the concentrate roasting, which was the reacting stoichiometric point of As and S with CaO. Similarly, for the crude gold ore with much basic gangues roasting at 700℃ , the S stabilization efficiency was 59.4% and As stabilization efficiency was 82. 3%. The corresponding caline was leached by sodium cyanide, the high extraction efficiency of Au was obtained simultaneously. The As and S stabili- zation reaction was strengthened by CFB roasting, in which the cleaner production of concentrate and crude gold ore roasting was realized preferably.

关 键 词：循环流态化焙烧 固硫 固砷 含砷金矿 氰化浸出 

分 类 号：TF831[冶金工程—有色金属冶金]