阅读说明：本技术 一种钢铁冶炼用脱氧助剂及其制造方法 (Deoxidation aid for steel smelting and manufacturing method thereof ) 是由 陈善辉 罗锋 张晴晴 于 2019-09-11 设计创作，主要内容包括：一种钢铁冶炼用脱氧助剂及其制造方法,该脱氧助剂是由下列成份组成(按重量组分计)：稀土瓷砂2.5-5.5份、轻质碳酸12.5-14.5份、硼砂3-7份、亚硝酸钙1.2-3.4份、羟甲基纤维钠7-12份、过硼酸钠22.5-25.5份、过氧化钠4.5-10.5份、铝5-12份、镁氯化钙17.5-22.5份、氧化硼11.5-14.5份、硅藻填料3-8份、聚丙烯酰胺8-14份,本发明具有较强的脱氧和去除及改变夹杂物形态的能力和细化晶粒作用,降低炼铁生产成本,增加钢铁企业的综合效益,有效地保护了厂区和废料场周边的环境。(A deoxidation aid for steel smelting and a manufacturing method thereof are disclosed, the deoxidation aid comprises the following components (by weight): 2.5-5.5 parts of rare earth porcelain sand, 12.5-14.5 parts of light carbonic acid, 3-7 parts of borax, 1.2-3.4 parts of calcium nitrite, 7-12 parts of hydroxymethyl fiber sodium, 22.5-25.5 parts of sodium perborate, 4.5-10.5 parts of sodium peroxide, 5-12 parts of aluminum, 17.5-22.5 parts of magnesium calcium chloride, 11.5-14.5 parts of boron oxide, 3-8 parts of diatom filler and 8-14 parts of polyacrylamide.)

1. A deoxidation auxiliary agent for steel smelting is characterized in that: the deoxidation aid consists of the following components: 2.5-5.5 parts of rare earth porcelain sand, 12.5-14.5 parts of light carbonic acid, 3-7 parts of borax, 1.2-3.4 parts of calcium nitrite, 7-12 parts of hydroxymethyl fiber sodium, 22.5-25.5 parts of sodium perborate, 4.5-10.5 parts of sodium peroxide, 13-17 parts of sodium perchlorate, 5-12 parts of aluminum, 17.5-22.5 parts of magnesium calcium chloride, 11.5-14.5 parts of boron oxide, 3-8 parts of diatom filler and 8-14 parts of polyacrylamide.

2. The deoxidation aid for steel smelting according to claim 1, wherein the deoxidation aid is comprised of: 2.5 parts of rare earth porcelain sand, 12.5 parts of light carbonic acid, 3 parts of borax, 1.2 parts of calcium nitrite, 7 parts of hydroxymethyl fiber sodium, 22.5 parts of sodium perborate, 4.5 parts of sodium peroxide, 13 parts of sodium perchlorate, 5 parts of aluminum, 17.5 parts of magnesium calcium chloride, 11.5 parts of boron oxide, 3 parts of diatom filler and 8 parts of polyacrylamide.

3. The deoxidation aid for steel smelting as claimed in claim 1 wherein the rare earth porcelain sand is 5.5 parts, light carbonic acid is 14.5 parts, borax is 7 parts, calcium nitrite is 3.4 parts, sodium hydroxymethyl fiber is 12 parts, sodium perborate is 25.5 parts, sodium peroxide is 10.5 parts, sodium perchlorate is 17 parts, aluminum is 12 parts, magnesium calcium chloride is 22.5 parts, boron oxide is 14.5 parts, diatom filler is 8 parts, and polyacrylamide is 14 parts.

4. The method for manufacturing a deoxidation aid for steel smelting according to claim 1, wherein the manufacturing method mainly comprises the steps of:

the method comprises the following steps: screening by using 100-120 meshes according to the weight components of the raw materials, adding the raw materials into an induction furnace, and smelting in a nitrogen protective atmosphere;

step two: smelting under the condition that nitrogen keeps a certain temperature to prepare an aluminum magnesium alloy ingot, and crushing the aluminum magnesium alloy ingot into lump materials;

step three: after reduction roasting and separation magnetic separation, drying by a dryer to obtain the deoxidation aid.

5. The method for manufacturing the deoxidation aid for steel smelting according to claim 4, wherein in the second step, the smelting environment under the nitrogen protection atmosphere is that the nitrogen pressure is kept at 0.35-0.55 Mpa, the smelting temperature is controlled at 1250-1550 ℃, the smelting time is 75-90 min, and the blocks crushed from the aluminum-magnesium alloy ingot pass through a 12.5-23.5 mm sieve.

Technical Field

The invention relates to a deoxidation auxiliary agent for steel smelting and a manufacturing method thereof, relating to the technical field of metallurgy.

Background

The magnesium-aluminum alloy used as the deoxidizer for the molten steel deoxidation treatment can obtain very low dissolved oxygen content, and has better effect of performing the modification treatment on the Al2O3 inclusions remained in the molten steel than other deoxidizers.

At present, in steel smelting, after molten steel is poured out of a steel ladle, residues left in the steel ladle are cooled and then conveyed to a waste material yard to be poured, most of the steel slag becomes powder after being cooled, and the steel slag has high temperature and light specific gravity and flies around when being poured, so that the environment around a plant area and the waste material yard is seriously damaged. The soil of the surrounding farmland is seriously polluted, and the living environment of surrounding residents becomes worse and worse.

Disclosure of Invention

The invention aims to solve the technical problem of the prior art, and provides the deoxidation auxiliary agent for steel smelting and the manufacturing method thereof, which have stronger deoxidation and the capability of removing and changing the form of inclusions and the effect of refining grains, reduce the production cost of iron making, increase the comprehensive benefits of steel enterprises, and effectively protect the environment around factories and waste material yards.

A deoxidation aid for steel smelting comprises the following components: 2.5-5.5 parts of rare earth porcelain sand, 12.5-14.5 parts of light carbonic acid, 3-7 parts of borax, 1.2-3.4 parts of calcium nitrite, 7-12 parts of hydroxymethyl fiber sodium, 22.5-25.5 parts of sodium perborate, 4.5-10.5 parts of sodium peroxide, 13-17 parts of sodium perchlorate, 5-12 parts of aluminum, 17.5-22.5 parts of magnesium calcium chloride, 11.5-14.5 parts of boron oxide, 3-8 parts of diatom filler and 8-14 parts of polyacrylamide.

As a further improvement of the invention, the deoxidation aid consists of the following components: 2.5 parts of rare earth porcelain sand, 12.5 parts of light carbonic acid, 3 parts of borax, 1.2 parts of calcium nitrite, 7 parts of hydroxymethyl fiber sodium, 22.5 parts of sodium perborate, 4.5 parts of sodium peroxide, 13 parts of sodium perchlorate, 5 parts of aluminum, 17.5 parts of magnesium calcium chloride, 11.5 parts of boron oxide, 3 parts of diatom filler and 8 parts of polyacrylamide.

As further improvement of the invention, the ceramic material comprises 5.5 parts of rare earth porcelain sand, 14.5 parts of light carbonic acid, 7 parts of borax, 3.4 parts of calcium nitrite, 12 parts of hydroxymethyl fiber sodium, 25.5 parts of sodium perborate, 10.5 parts of sodium peroxide, 17 parts of sodium perchlorate, 12 parts of aluminum, 22.5 parts of magnesium calcium chloride, 14.5 parts of boron oxide, 8 parts of diatom filler and 14 parts of polyacrylamide.

A manufacturing method of a deoxidation aid for steel smelting mainly comprises the following steps:

the method comprises the following steps: screening by using 100-120 meshes according to the weight components of the raw materials, adding the raw materials into an induction furnace, and smelting in a nitrogen protective atmosphere;

step two: smelting under the condition that nitrogen keeps a certain temperature to prepare an aluminum magnesium alloy ingot, and crushing the aluminum magnesium alloy ingot into lump materials;

step three: after reduction roasting and separation magnetic separation, drying by a dryer to obtain the deoxidation aid.

In the second step, the smelting environment under the nitrogen protection atmosphere is that the nitrogen pressure is kept at 0.35-0.55 Mpa, the smelting temperature is controlled at 1250-1550 ℃, the smelting time is 75-90 min, and the lump materials formed by crushing the aluminum-magnesium alloy ingot pass through a 12.5-23.5 mm sieve.

Compared with the prior art, the invention has stronger capabilities of deoxidizing and removing and changing the form of inclusions and the effect of refining grains, reduces the production cost of iron making, increases the comprehensive benefit of iron and steel enterprises, and effectively protects the environment around factories and waste material yards.

Detailed Description

The present invention will be described in further detail by way of examples.