一种新型带炉缸烟化炉的设计与应用

Design and application of a new type of fuming furnace with hearth

广西某冶炼公司采用火法流程处理脆硫铅锑矿,产生的鼓风炉水碎渣中含有大量锌、铟、锡、锑等有价金属,为了有效回收利用,公司决定新建造一座2.5 m;烟化炉。针对传统烟化炉耐火砖易上浮、维修频繁,同时风口中心高度较高不利于还原冶炼的问题,该公司采取了将炉底结构改为炉缸、优化炉体尺寸、改进风口装置和水套内衬等措施,重新设计了新型带炉缸烟化炉,该烟化炉可一炉两用,即可作为烟化炉处理鼓风炉渣,也可作为鼓风炉处理锌合金物料。作烟化炉使用时,按日处理铅锑鼓风炉炉渣60 t计算,该烟化炉每日可回收Pb 1.73 t、Sb 1.89 t、Zn 4.6 t、In 8 428 g,经济效益显著。该新型带炉缸烟化炉设计应用的成功,是脆硫铅锑矿火法流程的延伸与完善,为综合回收渣中的锌、铟、锡、锑等有价金属开辟了一条新的途径,而且生产稳定,具有推广应用价值。

A smelter in Guangxi Province uses pyrometallurgical process to treat jamesonite, and the granulated slag of blast furnace contains large quantity of Zn, In, Sn, Sb and other valuable metals.To effectively recover these valuable metals, the company decided to build a 2.5 m;fuming furnace. Given the fact that traditional fuming furnaces have the disadvantages of easy floating fire bricks that require frequent maintenance and big center height of tuyeres which is not beneficial to reduction smelting, the company has redesigned a new type of fuming furnace with hearth by taking a series of measures, for instances, converting the furnace bottom structure into a hearth, optimizing the furnace dimensions, modifying the tuyere device and water jacket lining, etc. The new type of fuming furnace can not only be used as a fuming furnace to treat blast furnace slag, but also be used as a blast furnace to treat zinc alloy ore. When being used as a fuming furnace, by assuming a daily treatment capacity of 60 t/d of Pb-Sb blast furnace slag, this fuming furnace can recover 1.73 t of Pb, 1.89 t of Sb, 4.6 t of Zn, and 8 428 g of In per day, with remarkable economical benefits. The successful design and application of this fuming furnace with hearth is the extension and perfection of jamesonite pyrometallurgical process, which has blazed a new trail for comprehensive recovery of Zn, In, Sn, Sb and other valuable metals;further more, its production operation is stable, therefore, it has the value to be widely used.