Method for simultaneously smelting hydrolysis slag, pyrite and zinc kiln slag by using blast furnace

一种用鼓风炉同时熔炼水解渣、硫铁矿和锌窑渣的方法

Abstract

本发明涉及一种用鼓风炉同时熔炼水解渣、锌窑渣和硫铁矿的方法,属金属冶炼技术领域。本方法为:a.取水解渣适量,热风干燥后水分要求为6-14%,然后进行压块,块矿自然干燥10-16h后备用;b.取锌窑渣55-71%,初始粒度要求+10目占80%以上;配入水解渣块矿9-20%、焦炭13%、石英石3-5%、硫铁矿4-7%;五种物料自然混合后进入鼓风炉中熔炼;c.鼓风炉熔炼温度为600-1350℃,熔炼周期为40-80min,料柱高为1.5-1.8m,鼓风量为7000-8000m3/h;d.熔炼后得到的含金银冰铜回收后作为炼铜的原料,烟尘中的锌、铅有价元素,回收后直接作为炼锌、铅的原料;水淬渣直接作为生产水泥的原料。本发明的优点在于:环境友好、仅一道工序就能同时获得初产品冰铜、水淬渣和烟尘,实现了有价元素的高效分离和零排放。
The invention relates to a method for simultaneously smelting hydrolysis slag, zinc kiln slag and pyrite by using a blast furnace, which belongs to the technical field of metal smelting. The method comprises the following steps: a, taking a proper amount of hydrolysis slag, drying the hydrolysis slag with hot air to meet the moisture requirement of 6 to 14 percent, then briquetting the hydrolysis slag, and naturally drying the briquette for 10 to 16 hours for later use; b, taking 55 to 71 percent of zinc kiln slag of which over 80 percent meets the initial granularity requirement of 10 meshes, adding 9 to 20 percent of hydrolysis slag briquette, 13 percent of coke, 3 to 5 percent of quartzite and 4 to 7 percent of pyrite into the zinc kiln slag, naturally mixing the five materials and then smelting the mixture in the blast furnace; c, smelting the mixture in the blast furnace, wherein the smelting temperature is between 600 and 1,350 DEG C, the smelting period is 40 to 80 minutes, the material column height is 1.5 to 1.8 meters and the volume of blast is 7,000 to 8,000 m<3>/h; and d, reclaiming the gold and sliver-containing copper matte obtained after smelting to obtain a raw material for smelting copper, reclaiming zinc and lead valuable elements in the soot to directly obtain raw materials for smelting zinc and lead, and directly using water granulated slag as a raw material for producing cement. The method has the advantages of simultaneously obtaining the copper matte, the water granulated slag and the soot serving as primary products through one process, realizing efficient separation and zero emission of the valuable elements, along with environmental protection.

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