System for preparing steel slag sintered bricks

Abstract

The invention discloses a system for preparing steel slag sintered bricks, which comprises a steel slag treatment subsystem, a green body manufacturing subsystem and a green body sintering subsystem; the steel slag treatment subsystem comprises a steel slag conveyor, a steel slag receiving production line for conveying produced steel slag, a steel slag dipping box, a steel slag receiving conveyor for conveying the steel slag to the steel slag dipping box to dip and filter the steel slag to obtain solid residues, a washing dryer, a steel slag receiving and dipping box for washing and drying the filtered solid residues, a first ball mill connected with the washing dryer to grind the dried solid residues into steel slag powder with the particle size of 400-450 microns, and a second ball mill connected with an auxiliary material feeding hooper. According to the system for preparing the steel slag sintered bricks, the steel slag dipping box is arranged in the steel slag treatment subsystem and used for dipping the steel slag, so that part of free calcium oxide in the steel slag can be removed, and the problem of poor volume stability caused by the free calcium oxide is fundamentally controlled.

Description

technical field [0001] The invention relates to the technical field of solid waste recycling, in particular to a system for preparing sintered steel slag bricks. Background technique [0002] 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. The mineral composition of steel slag is mainly tricalcium silicate, followed by dicalcium silicate, RO phase, dicalcium ferrite and free calcium oxide. Steel slag is clinker, which is a heavy melting phase and has a low melting temperature. When re-melted, the liquid phase is formed early...

AI Technical Summary

Problems solved by technology

[0004] (1) During the processing of steel slag, there is no good removal mechanism for the iron in steel slag, which affects the quality of the prepared bricks;

[0005] (2) During the processing of steel slag, there is a lack of cleaning structure for free calcium oxide in steel slag, which leads to the problem of poor volume stability when the prepared bricks are formed

[0006] (3) Steel slag powder, auxiliary material powder and bonding slurry are directly mixed and stirred, the efficiency of stirring is low, and the uniformity of mixing is relatively poor;

[0007] (4) The adobe made by the vacuum extruder lacks a maintenance structure, resulting in poor strength and stability of the adobe after firing and molding

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