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硫酸渣是化工厂生产硫酸时排出的所谓废物,又称烧渣。它包括三部分: (1)制硫酸沸腾炉溢流口排出的溢流渣。 (2)随二氧化硫气体从烟道跑出,在U形管和旋风除尘器内沉降下来的矿灰。 (3)从泡沫塔经水洗涤下来的矿泥。每生产一吨硫酸约有七百公斤的硫酸渣产出。硫酸渣中矿灰占70％左右,含铁品位高,是回收铁的主要对象。矿泥产出量极少,所以一般又将溢流渣和矿灰的混合物称混合渣。
Sulfuric acid residue is the so-called waste discharged when the sulfuric acid plant produces sulfuric acid, also known as slag. It includes three parts: (1) sulfuric acid boiling furnace overflow overflow discharge slag. (2) Sludge that has settled down in the U-shaped tube and the cyclone with the sulfur dioxide gas coming out of the flue. (3) Slime washed with water from the foam tower. About every kilogram of sulfuric acid produced per tonne of sulfuric acid is produced. Sulfuric acid slag in the ash accounted for about 70%, high-grade iron, iron is the main object of recovery. Sludge output is very small, so in general the mixture of overflow slag and mineral ash is called mixed slag.