阅读说明：本技术 一种钢渣酸磨剂及其应用 (Steel slag acid grinding agent and application thereof ) 是由 张亚梅 霍彬彬 陈春 李保亮 黄时玉 于 2019-10-29 设计创作，主要内容包括：本发明涉及一种钢渣酸磨剂及其应用,该酸磨剂按照质量份包括硫酸0.01～40份、硝酸0.01～80份、盐酸0.01～10份和丙烯酸0.01～90份,其应用于钢渣粉粉磨,具体为在钢渣粉粉磨过程中采用滴加或者喷洒方式,加入酸磨剂后需继续粉磨一定时间。本发明的酸磨剂适应性强、性能稳定,在钢渣粉粉磨过程中可使激发钢渣的活性成分,增大钢渣粉比表面积,降低游离氧化钙含量,提高钢渣粉的粉磨效率,并提高含钢渣水泥基材料的早期强度。(The invention relates to a steel slag acid grinding agent and application thereof, wherein the acid grinding agent comprises, by mass, 0.01-40 parts of sulfuric acid, 0.01-80 parts of nitric acid, 0.01-10 parts of hydrochloric acid and 0.01-90 parts of acrylic acid, and is applied to steel slag powder grinding, specifically, a dripping or spraying mode is adopted in the steel slag powder grinding process, and the steel slag powder is continuously ground for a certain time after the acid grinding agent is added. The acid grinding agent has strong adaptability and stable performance, can excite the active ingredients of the steel slag in the grinding process of the steel slag powder, increase the specific surface area of the steel slag powder, reduce the content of free calcium oxide, improve the grinding efficiency of the steel slag powder and improve the early strength of the cement-based material containing the steel slag.)

1. The steel slag acid grinding agent is characterized in that: the acid grinding agent comprises, by mass, 0.01-40 parts of sulfuric acid, 0.01-80 parts of nitric acid, 0.01-10 parts of hydrochloric acid and 0.01-90 parts of acrylic acid.

2. The steel slag acid grinding agent of claim 1, wherein: the mass concentration of the sulfuric acid is more than or equal to 95 percent, the mass concentration of the nitric acid is more than or equal to 65 percent, the mass concentration of the hydrochloric acid is more than or equal to 30 percent, and the mass concentration of the acrylic acid is more than or equal to 80 percent.

3. The use of the steel slag acid milling agent as defined in claim 1, wherein: the steel slag acid grinding agent is applied to steel slag powder grinding, and specifically adopts a dropping or spraying mode in the steel slag powder grinding process, and the steel slag acid grinding agent needs to be continuously ground for a certain time after being added.

4. The use of the steel slag acid milling agent as defined in claim 3, wherein: the addition amount of the acid grinding agent in the grinding process of the steel slag powder is 0.01-10% of the weight of the steel slag powder.

5. The use of the steel slag acid milling agent as defined in claim 3, wherein: the specific surface area of the steel slag powder is more than or equal to 250m²/kg。

6. The use of the steel slag acid milling agent as defined in claim 3, wherein: the dripping or spraying time of the acid grinding agent is more than 1 min.

7. The use of the steel slag acid milling agent as defined in claim 3, wherein: the step of continuously grinding for a certain time after the acid grinding agent is added means that the grinding is continuously carried out for more than 15min after the acid grinding agent is added.

Technical Field

The invention relates to a steel slag acid grinding agent and application thereof, belonging to the field of acid grinding agents.

Background

The steel slag powder is used for replacing cement, so that the production of cement clinker can be saved, and global CO can be reduced₂The discharge of the cement concrete can also effectively treat and utilize the solid waste steel slag, and optimize the microstructure of the cement concrete to a certain extent.

However, steel slag is difficult to grind, and conventional grinding aids (such as a cement grinding aid 201510681382.3, a liquid cement grinding aid 201610471281.8, a converter hot-stewed steel slag composite organic grinding aid, a preparation method and a use method of the organic grinding aid 201710046347.3, a steel slag grinding aid, a preparation method of the steel slag grinding aid 201410124868.2 and the like) are too mild in performance, so that crystals with good crystallinity in the steel slag and high-energy covalent bonds in amorphous bodies are difficult to destroy, the activity of the steel slag is difficult to excite, and harmful components in the steel slag are difficult to reduce free calcium oxide.

Disclosure of Invention

The technical problem is as follows: the invention aims to provide a steel slag acid grinding agent and application thereof, wherein the high-energy unsteady state of acid is utilized to destroy covalent bonds in steel slag, so as to excite the activity of the steel slag and simultaneously form an acid grinding product CaSO₄、CaCl₂、Ca(NO₃)₂And the early strength components, and the content of free calcium oxide in the steel slag are reduced, so that the problems of low activity and poor stability of the steel slag powder are solved.

The technical scheme is as follows: the invention provides a steel slag acid grinding agent which comprises, by mass, 0.01-40 parts of sulfuric acid, 0.01-80 parts of nitric acid, 0.01-10 parts of hydrochloric acid and 0.01-90 parts of acrylic acid.

Wherein:

the mass concentration of the sulfuric acid is more than or equal to 95 percent, the mass concentration of the nitric acid is more than or equal to 65 percent, the mass concentration of the hydrochloric acid is more than or equal to 30 percent, and the mass concentration of the acrylic acid is more than or equal to 80 percent.

The invention also provides an application of the steel slag acid grinding agent, which is applied to steel slag powder grinding, and particularly adopts a dropping or spraying mode in the steel slag powder grinding process, and the steel slag acid grinding agent needs to be continuously ground for a certain time after being added.

Wherein:

the addition amount of the acid grinding agent in the grinding process of the steel slag powder is 0.01-10% of the weight of the steel slag powder.

The specific surface area of the steel slag powder is more than or equal to 250m²/kg。

The dripping or spraying time of the acid grinding agent is more than 1 min.

The step of continuously grinding for a certain time after the acid grinding agent is added means that the grinding is continuously carried out for more than 15min after the acid grinding agent is added.

Has the advantages that: compared with the prior art, the invention has the following advantages:

(1) the acid grinding agent can reduce the grinding energy consumption of the steel slag;

(2) the acid grinding agent can destroy the covalent bonds of crystals and non-crystals in the steel slag and improve the activity of the steel slag;

(3) the acid grinding agent can reduce the content of free calcium oxide in the steel slag;

(4) the early strength component can be generated after acid grinding by the acid grinding agent, and the early strength of the cement containing the steel slag is improved;

(5) the acid grinding agent has low cost and higher application prospect.

Detailed Description

The invention innovatively provides a steel slag acid grinding agent and application thereof, which utilize the high-energy unsteady state of acid to destroy covalent bonds in steel slag, excite the activity of the steel slag and simultaneously form an acid grinding product CaSO₄、CaCl₂、Ca(NO₃)₂The early strength components are equal, the content of free calcium oxide in the steel slag is reduced, and the steel slag plays a role in achieving multiple purposes, and the invention is specifically explained by combining with the embodiment.