Converter steel slag treatment new process

Abstract

The invention relates to a converter steel slag treatment new process. The converter steel slag treatment new process comprises the technological steps that (1) steel slag hot splashing: hot-melting steel slag is directly put into hot splashing slag tanks and is subjected to water cooling to make the steel slag and water have a reaction; the steel slag is subjected to self-decomposing and powdering, and slag and iron are separated; (2) the powdered steel slag subjected to hot splashing is grabbed and transported to a self-discharging transportation truck by an excavator and transported to a steel slag screening, crushing and magnetic separation production line; (3) the steel slag is screened through a grid screen with 200-mm screen holes below a hopper, and the steel slag with the grain size greater than 200 mm is loaded onto the self-discharging truck through a loader and transported to a drop hammer crushing room for crushing, the drop hammer crushing room is equipped with electromagnetic suction cups and drop hammers, crushed steel slag is returned for steelmaking, and the steel slag returns to the grid screen; and (4) the steel slag with the grain size less than 200 mm is subjected to a series of crushing, and screening and then are directly returned for steelmaking, the steel slag with the grain size less than 10-50 mm is fed into a rod mill for crushing and stripping andis subjected to magnetic separation twice through an electromagnetic self-discharging iron separator and a roller magnetic separator, and magnetic separated powder with the grain size less than 10 mmand tailings with the grain size less than 10 mm are fed into a magnetic separated powder warehouse and a tailing warehouse correspondingly. Through the converter steel slag treatment new process, thequality level of the steel slag TFe reaches to 85% or above finally, and the iron content of the tailings is less than 2%.

Description

technical field [0001] The invention relates to a novel and effective process for treating steel slag in a converter. Background technique [0002] Steel slag is an inevitable product of steel production. After years of development, my country's steel output ranks first in the world, and the production of steel slag has also increased. In 2006, the comprehensive utilization rate of steel slag in China was only 10%. A large amount of steel slag is piled up, occupying land, polluting the environment, and wasting resources. The sustainable development of the iron and steel industry is facing severe challenges. [0003] At present, the cracking effect of the simple steel slag treatment method is poor, the cracking rate is 30%, the particle size is uneven, the steel slag particle size is less than 10mm accounts for more than 20%, pollutes the environment, wastes resources, and the recovery rate of iron-containing raw materials is 10% (including large scrap steel) . [0004] The...

AI Technical Summary

Problems solved by technology

A large amount of steel slag is piled up, occupying land, polluting the environment, and wasting resources. The sustainable development of the iron and steel industry is facing severe challenges

[0003] At present, the cracking effect of the simple steel slag treatment method is poor, the cracking rate is 30%, the particle size is uneven, the steel slag particle size is less than 10mm accounts for more than 20%, pollutes the environment, wastes resources, and the recovery rate of iron-containing raw materials is 10% (including large scrap steel)

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