阅读说明：本技术 一种用氧鼓泡液态钢渣制备低成本胶凝材料的方法及得到的低成本胶凝材料 (Method for preparing low-cost cementing material from oxygen bubbling liquid steel slag and obtained low-cost cementing material ) 是由 田键 胡攀 于 2020-06-23 设计创作，主要内容包括：本发明属于液态钢渣综合利用技术领域,具体涉及一种利用氧鼓泡液态钢渣生产低成本胶凝材料的方法及得到的低成本胶凝材料。该方法包括如下步骤：将炼钢产生的高温转炉钢渣包在通入氧管吹氧剧烈搅动鼓泡的情况下,加入硅质调整剂和铝质调整剂,充分反应后,风淬造粒后急速冷却降至常温,再将物料研磨,得到低成本胶凝材料。该方法在高温液态钢渣中,添加硅质调整剂和铝质调整剂,控制低成本胶凝材料中Si、Al等主要元素含量在水泥熟料成分合适的范围,通过底顶侧吹法鼓氧,充分搅动液态钢渣,使调整剂与高温液态钢渣混合均匀并充分进行反应,风淬造粒急速冷却,破碎磨细得到高活性低成本胶凝材料。(The invention belongs to the technical field of comprehensive utilization of liquid steel slag, and particularly relates to a method for producing a low-cost cementing material by using oxygen bubbling liquid steel slag and the obtained low-cost cementing material. The method comprises the following steps: under the condition that a high-temperature converter steel slag ladle generated in steel making is vigorously stirred and bubbled by oxygen blowing through an oxygen pipe, adding a siliceous regulator and an aluminum regulator, fully reacting, carrying out air quenching granulation, rapidly cooling to normal temperature, and grinding the materials to obtain the low-cost cementing material. Adding a siliceous regulator and an aluminum regulator into high-temperature liquid steel slag, controlling the contents of main elements such as Si, Al and the like in the low-cost cementing material to be in a proper range of cement clinker components, blowing oxygen by a bottom-top blowing method, fully stirring the liquid steel slag, uniformly mixing the regulator and the high-temperature liquid steel slag, fully reacting, carrying out air quenching granulation and rapid cooling, crushing and grinding to obtain the high-activity low-cost cementing material.)

1. A method for producing a low-cost cementing material by using oxygen bubbling liquid steel slag is characterized by comprising the following steps: adding a siliceous regulator and an aluminum regulator into a high-temperature converter steel slag ladle generated in steel making under the condition of vigorous stirring and bubbling of oxygen by introducing an oxygen pipe, granulating after full reaction, rapidly cooling to normal temperature, and grinding the materials to obtain the low-cost cementing material.

2. The method of producing a low-cost cementitious material using oxygen-bubbled liquid steel slag as claimed in claim 1, wherein: the oxygen blowing of the oxygen pipe is to perform oxygen blowing by adopting a bottom-top side blowing method so as to stir the liquid steel slag.

3. The method of producing a low-cost cementitious material using oxygen-bubbled liquid steel slag as claimed in claim 1, wherein: the temperature of the steel slag in the stirring process of oxygen blowing is 1400-1700 ℃; the reaction time of the heat preservation of the temperature of the steel slag in the stirring process of oxygen blowing is 20-60 min.

4. The method of producing a low-cost cementitious material using oxygen-bubbled liquid steel slag as claimed in claim 1, wherein: and the granulation is to form small particles of 2-8mm by the high-temperature liquid slag after full reaction through a wind quenching granulation system.

5. The method of producing a low-cost cementitious material using oxygen-bubbled liquid steel slag as claimed in claim 1, wherein:

the percentage of the total mass of the siliceous conditioning and aluminous conditioning agent to the total mass of the steel slag is 10 to 60 percent;

the mass ratio of the added siliceous regulator to the added aluminous regulator is (1:1) - (6: 1).

6. The method for producing the low-cost cementing material by using the oxygen bubbling liquid steel slag as claimed in claim 1, wherein the siliceous modifier comprises the following components in percentage by mass: SiO 2₂％：60％-90％，CaO％：1-20％，Al₂O₃％：5-30％，MgO％：0.1-10％。

7. The method of claim 6 for producing a low cost cementitious material using oxygen-bubbled liquid steel slag, wherein: the siliceous regulator is selected from one or more of coal gangue, silicon mud, silicon powder or wollastonite.

8. The method for producing the low-cost cementing material by using the oxygen bubbling liquid steel slag as claimed in claim 1, wherein the aluminum regulator comprises the following components in percentage by mass: al (Al)₂O₃％：20-60％，SiO₂：10％-30％，CaO％：5-30％，MgO％：0-10％。

9. The method of claim 8 for producing a low cost cementitious material using oxygen-bubbled liquid steel slag, wherein: the aluminum regulator is selected from one or more of fly ash, secondary aluminum ash, bauxite or kaolin.

10. A low-cost cementitious material produced by the method for producing a low-cost cementitious material using oxygen-bubbled liquid steel slag according to any one of claims 1 to 9.

Technical Field

The invention belongs to the technical field of comprehensive utilization of steel slag, and particularly relates to a method for producing a low-cost cementing material by using oxygen bubbling liquid steel slag and the obtained low-cost cementing material.

Background

In recent years, with the increasing production of steel in China, the production of steel as a byproduct in the steel making process is also rapidly increasing. According to incomplete statistics, the accumulated inventory of the steel slag reaches more than 2 hundred million tons by 2019 years, but the utilization rate is only 40 percent at present. A large number of sentry stations are stored in the open air all the year round, occupy a large amount of land and cause serious pollution to surrounding soil and water bodies.

At present, most of steel slag is used for filling sea, road bed and other backfill materials, the utilization value is low, and a great deal of waste of resources is caused. The steel slag is partially used for cement admixture, can improve the relative performance of concrete to a certain extent, but the application is greatly limited due to high grinding cost and unobvious effect of the steel slag.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention discloses a method for producing a low-cost cementing material by using oxygen bubbling liquid steel slag and the obtained low-cost cementing material. Adding a siliceous regulator and an aluminum regulator into high-temperature liquid steel slag, controlling the contents of main elements such as Si, Al and the like in the low-cost gelled material to be in a proper range of the components of cement clinker, blowing oxygen by a bottom-top blowing method, fully stirring the liquid steel slag, uniformly mixing the regulator and the high-temperature liquid steel slag, fully reacting, granulating by an air quenching system, rapidly cooling, crushing and grinding to obtain the high-activity low-cost gelled material.

The technical scheme provided by the invention is as follows:

a method for producing a low-cost cementing material by using oxygen bubbling liquid steel slag comprises the following steps: adding a siliceous regulator and an aluminum regulator into a high-temperature converter steel slag ladle generated in steel making under the condition of vigorous stirring and bubbling of oxygen by introducing an oxygen pipe, granulating after full reaction, rapidly cooling to normal temperature, and grinding the materials to obtain the low-cost cementing material.

Detailed Description

The principles and features of this invention are described below in conjunction with examples which are set forth to illustrate, but are not to be construed to limit the scope of the invention.