Superfine steel slag treatment system and method

Abstract

The invention provides a superfine steel slag treatment system and method. The superfine steel slag treatment system comprises a metering device, a feeding belt conveyor, a steel slag vertical mill, adust collector and a steel slag warehouse, the metering device is connected with the steel slag vertical mill through the feeding belt conveyor, the steel slag vertical mill is provided with an air lock valve and an air ring, steel slag enters the steel slag vertical mill through the air lock valve to be ground, the ground steel slag is brought into the dust collector by gas of the air ring to becollected, and the dust collector is connected with the steel slag warehouse through an air conveying chute. The superfine steel slag treatment method comprises the steps that S1, the steel slag is fed into the steel slag vertical mill through the air lock valve to be ground; S2, qualified ground fine powder is collected by the dust collector; and S3, the fine powder is collected by the dust collector and then is conveyed to the steel slag warehouse by the air conveying chute. According to the superfine steel slag treatment system and method, free-state calcium in the steel slag is reduced through multiple grinding of the steel slag vertical mill, the steel slag can be efficiently ground, activity of finished products is improved, product competitiveness is enhanced, and through a formedhot air channel, the steel slag is dried while being ground in the steel slag vertical mill.

Description

technical field [0001] The present application relates to the technical field of steel slag treatment, in particular to an ultra-fine steel slag treatment system and method. Background technique [0002] Steel slag is a by-product of the steelmaking process. It is composed of various oxides formed by the oxidation of impurities such as silicon, manganese, phosphorus, and sulfur in pig iron during the smelting process, and salts formed by the reaction of these oxides with solvents. Steel slag contains a variety of useful components: 2% to 8% of metallic iron, 40% to 60% of calcium oxide, 3% to 10% of magnesium oxide, and 1% to 8% of manganese oxide, so it can be used as raw material for iron and steel metallurgy. There are two main ways to comprehensively utilize steel slag as a secondary resource. One is to recycle steel slag in our factory as a smelting solvent, which can not only replace limestone, but also recover a large amount of metallic iron and other useful elements...

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Problems solved by technology

[0004] Various aspects of the present application provide a system and method for processing ultra-fine steel slag to solve the problems in the prior art that it is difficult to meet the production needs, the utilization rate of steel slag is low, and additional pre-drying equipment is required

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