阅读说明：本技术 一种新型炼钢脱氧剂及还原炼钢方法 (Novel steelmaking deoxidizer and reduction steelmaking method ) 是由 陈东风 于 2020-06-01 设计创作，主要内容包括：本发明涉及一种新型炼钢脱氧剂及还原炼钢方法,本发明炼钢脱氧剂为煤球,煤球直径大小为3.0-5.0cm。还原炼钢方法按照如下步骤进行：废钢和铁水在炼钢炉中加热熔化,钢水倒入钢包2min内加入煤球,待煤球与氧反应结束,加入铝脱氧剂。本发明达到脱氧的目的,反应过程中生成的CO或者CO<Sub>2</Sub>气体从钢水中外排出来,可降低钢水中脱氧产生的杂质,提高钢水洁净度,降低炼钢成本。(The invention relates to a novel steelmaking deoxidizer and a reduction steelmaking method, wherein the steelmaking deoxidizer is a coal ball, and the diameter of the coal ball is 3.0-5.0 cm. The reduction steelmaking method comprises the following steps: heating and melting scrap steel and molten iron in a steel making furnace, pouring the molten steel into a steel ladle, adding a briquette within 2min, and adding an aluminum deoxidizer after the reaction of the briquette and oxygen is finished. The invention achieves the aim of deoxidation, and CO or CO generated in the reaction process 2 The gas is discharged from the molten steel, so that impurities generated by deoxidation in the molten steel can be reduced, the cleanliness of the molten steel is improved, and the steelmaking cost is reduced.)

1. A novel deoxidizing agent for steelmaking is characterized in that the deoxidizing agent for steelmaking is a briquette, and the diameter of the briquette is 3.0-5.0 cm.

2. The novel deoxidizer for steelmaking as claimed in claim 1, wherein the briquettes are bonded together by coal dust and a binder, and the percentage of carbon in the briquettes is not less than 75%.

3. The novel deoxidizer for steelmaking as claimed in claim 2, wherein the binder comprises any one or more of clay, magnesium chloride, carboxymethyl cellulose and starch.

4. A reduction steelmaking method is characterized by comprising the following steps:

heating and melting scrap steel and molten iron in a steel making furnace to obtain molten steel;

pouring molten steel into a ladle, and adding the briquette within 2 min;

after the reaction of the briquette and oxygen is finished, adding aluminium deoxidant.

5. A reduction steelmaking process as claimed in claim 4, in which the mass ratio of scrap to molten iron is (15-30) to (70-85).

6. The method of claim 4, wherein the mass ratio of the molten steel, the briquette and the aluminum deoxidizer is 1000 (2-4) to (1-2).

Technical Field

The invention belongs to the technical field of metallurgy, and particularly relates to a novel steelmaking deoxidizer and a reduction steelmaking method.

Background

Direct reduction iron making is a process for reducing iron ore to metallic iron in a reaction apparatus with a gaseous or solid reducing agent below the ore softening temperature. At present, the deoxidation process of aluminum alloy products is mostly adopted in converter steelmaking deoxidation, aluminum oxide generated after aluminum deoxidation enters molten steel, the aluminum oxide is difficult to remove, and the aluminum oxide is main impurities in the molten steel, so that the quality of steel is seriously influenced.

Disclosure of Invention

The present invention has been made to solve the above problems, and an object of the present invention is to provide a novel steelmaking deoxidizer and a method of reduction steelmaking that reduce the impurity content in molten steel and improve the cleanliness of molten steel.

In order to solve the problems, the technical scheme adopted by the invention is as follows:

a novel deoxidizing agent for steelmaking is characterized in that the deoxidizing agent for steelmaking is a briquette, and the diameter of the briquette is 3.0-5.0 cm.

Furthermore, the coal briquette is bonded by coal powder and a binder, and the percentage content of carbon in the coal briquette is not lower than 75%.

Further, the binder comprises any one of clay, magnesium chloride, carboxymethyl cellulose and starch or starch.

A reduction steelmaking method is characterized by comprising the following steps:

(1) heating and melting scrap steel and molten iron in a steel making furnace to obtain molten steel;

(2) pouring the molten steel into a ladle, and adding the briquette within 2 min;

(3) after the reaction of the briquette and oxygen is finished, adding aluminium deoxidant.

Further, the mass ratio of the scrap steel to the molten iron is (15-30) to (70-85).

Further, the mass ratio of the molten steel, the coal dust and the aluminum deoxidizer is 1000 (2-4) to (1-2).

The invention has the beneficial effects that:

when tapping, the coal ball is added into the molten steel, and the coal ball reacts with oxygen in the molten steel to achieve the aim of deoxidation. CO or CO formed during the reaction₂Gas is discharged from molten steel, so that impurities generated by deoxidation in the molten steel can be reduced, and the cleanliness of the molten steel is improved.

The briquette as the deoxidizer can reduce the consumption of aluminum deoxidizer and lower the steel-making cost.

Detailed Description

The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more readily understand the advantages and features of the present invention and to clearly and unequivocally define the scope of the present invention.