Electrical steel scrap recovery treatment method

A technology for recycling and processing electrical steel, applied in recycling technology, improving process efficiency, manufacturing converters, etc., can solve the problem of high cost, and achieve the effect of reducing smelting cost and consumption

Inactive Publication Date: 2015-10-14
BAOSTEEL RESOURCES
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  • Abstract
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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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  • Electrical steel scrap recovery treatment method

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Embodiment Construction

[0032] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings of the embodiments.

[0033] see figure 1 , the electrical steel scrap recovery processing method of the present invention comprises the following steps:

[0034] The method for recovering electrical steel scraps of the present invention specifically comprises the following steps:

[0035] S1, screen the leftovers generated after the electrical steel processing.

[0036] This refers to the following classification and treatment of electrical steel scraps of different specifications at the source of electrical steel production:

[0037] For blocky and flaky leftovers, they are directly classified as finished electrical steel scrap;

[0038] For strips and thin steel scraps, they are made into baled blocks. The method of making baled blocks: Before packing, the strips and light scraps are wrapped with a small inside and a large ou...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/28C21C7/00C21B3/04
CPCY02P10/20Y02W30/50
Inventor 汪正全狄永忠曹伟吴伟民孙褚庆
Owner BAOSTEEL RESOURCES
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