Electrical steel scrap recovery treatment method

Abstract

The invention provides an electrical steel scrap recovery treatment method, which relates to a steel scrap treatment method and solves the problem of inadequate electrical steel heavy slash resources. The method comprises the following steps: carrying out screening treatment on the scrap generated after electrical steel processing to form an electrical steel scrap finished product and a packaged block; adding the electrical steel scrap finished product and packaged block into a steel scrap hopper in any ratio, and sending into a converter as smelting raw materials of the electrical steel grade; and carrying out molten iron pretreatment to perform low-sulfur control on the molten iron, and carrying out converter low-slag smelting. The smelting process comprises the following steps: enhancing the final temperature of the converter, lowering the iron oxide content of furnace slag, controlling the addition of lime, carrying out end point low-sulfur control, lowering the molten iron ratio of the converter, and accurately controlling the residual component. According to the method, the electrical steel scraps with different specifications are classified or packaged into the pressed block, and the electrical steel scraps and pressed block are used as the electrical steel smelting raw materials to perform electrical steel low-slag smelting, so that the steel scrap rate of the converter is enhanced to 10% or above, thereby reducing the consumption of precious metals and lowering the smelting cost.

Description

technical field [0001] The invention relates to a method for processing scrap steel, in particular to a method for recycling and processing electrical steel scraps. Background technique [0002] Electrical steel is widely used in motors, home appliances, compressors, transformers, relays, electromagnetic switches, etc., and is used in industries such as compressors, motors, and transformers. [0003] At present, the smelting of electrical steel mainly relies on molten iron. Oriented silicon steel is basically smelted with 100% molten iron, and the ratio (weight) of molten iron for low-grade non-oriented electrical steel is also above 90%. In the past, 3-10% was mainly used for smelting electrical steel. (weight) car slices, and the sources of car slices are complicated and the composition is unstable, which often causes the sulfur and titanium components of electrical steel to exceed the standard. Electrical steel scrap is currently the most pure variety on the market, only...

AI Technical Summary

Problems solved by technology

In order to solve this problem, some enterprises orientedly import electrical steel scrap, such as the electrical steel with low titanium, low sulfur, and low residual elements developed by Baosteel. The recycled scrap mainly comes from Hitachi, Tongda, Pression, etc., which use electrical steel raw materials. Manufacturer, and after passing the qualification certification, it is exclusively used by Baosteel, and the cost is relatively high

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