艾萨熔炼——一座生产能力25万t/a的铜熔炼炉

Isasmelt-A 250 000 TPA Copper Smelting Furnace

芒特·艾萨矿物控股有限公司 (简称 MIM)和澳大利亚国家科学院 (简称 CSIRO)在 80年代联合开发了浸没式喷枪顶吹熔炼技术——艾萨熔炼法 (Isasm elt) ,1992年用此工艺改造了芒特·艾萨铜冶炼厂 ,建有 1台内径 3.6 6 m高 14.5 4m的艾萨炉 ,1台带有流态化床混合室的立式余热锅炉和静电除尘器 ,1台用于铜锍和炉渣分离的转动式沉降炉 ,以及相应的物料准备和上料系统、5 2 5 t/ d的制氧站等。改造后的铜熔炼系统处理精矿能力 10 0 t/ h,相当于年处理精矿含铜 18万 t。1996年 MIM开发了距芒特·艾萨 12 0 km的 Enterprise和 Ernent Henry矿 ,铜精矿产量增加 ,于是决定扩建铜冶炼厂 ,欲将现有艾萨炉的熔炼能力扩建到处理精矿含铜 2 5万 t/ a。为减少扩建工程的风险 ,缩短扩建周期 ,减少由于扩建给生产带来的影响 ,在 1997年进行了两次提高给料率的试验 ,以论证铜艾萨炉在增加 5 2 5 t/ d供氧能力的情况下处理精矿含铜可达 2 5万 t/ a。

MIM Holdings Limited (MIM) committed to a long term future in copper in the Carpentaria Mineral Province in 1996 with the development of the Enterprise and Emest Henry mines, and an upgrade of MIMs' copper smelter in Mount Isa, and copper refinery in Townsville. The upgrade of the copper smelter will enable the smelter to produce 250 000 tpa of copper with a single primary smelting unit, the copper Isasmelt furnace installed in 1992.\;The copper Isasmelt furnace currently smelts concentrate containing 145 000 tpa copper. To reduce the risk associated with the copper smelter upgrade, and shorten the ramp up time of the upgraded smelter, two high rate trials were undertaken in 1997 to demonstrate that the copper Isasmelt furnace could, with an additional 525 tpd of tonnage oxygen, treat concentrates containing 250 000 tpa copper. This paper describes procedure and results of trial 1 and 2.