阅读说明：本技术 一种钢渣基多金属复合磷酸盐水泥 (Steel slag-based multi-metal composite phosphate cement ) 是由 罗中秋 马越 周新涛 母维宏 王路星 邵周军 于 2020-04-16 设计创作，主要内容包括：本发明公开了一种钢渣基多金属复合磷酸盐水泥,属于快速修补建筑材料技术领域。该水泥的原料组成及重量份为钢渣100份、磷酸盐15～50份、缓凝剂1～5份；使用时该水泥材料与水的搅拌混合,具有凝结速度可控,早期强度高,低温凝结速度快,体积变形小,环境适应性广,耐磨性强及抗冻性好等优良性能；利用钢渣中复合的金属物制备磷酸盐水泥,降低了材料制备成本,同时为钢渣的高效资源化利用提供了一种新途径,该方法具有一定的环保和经济效益。(The invention discloses steel slag-based polymetallic composite phosphate cement, and belongs to the technical field of rapid repair of building materials. The cement comprises the following raw materials, by weight, 100 parts of steel slag, 15-50 parts of phosphate and 1-5 parts of retarder; when in use, the cement material is stirred and mixed with water, and has the excellent performances of controllable condensation speed, high early strength, high low-temperature condensation speed, small volume deformation, wide environmental adaptability, strong wear resistance, good freezing resistance and the like; the phosphate cement is prepared by utilizing the metal compound in the steel slag, so that the material preparation cost is reduced, a new way is provided for the efficient resource utilization of the steel slag, and the method has certain environmental protection and economic benefits.)

1. A steel slag base-based multi-metal composite phosphate cement is characterized in that: the steel slag retarder comprises, by weight, 100 parts of steel slag, 15-50 parts of phosphate and 1-5 parts of retarder.

2. The steel slag-based polymetallic composite phosphate cement according to claim 1, characterized in that: the steel slag is ground and sieved by a 120-mesh sieve, and the sieve residue is less than 5 percent.

3. The steel slag-based polymetallic composite phosphate cement according to claim 2, characterized in that: the steel slag is calcined at high temperature, and the calcining temperature is 500-800 ℃.

4. The steel slag-based polymetallic composite phosphate cement according to claim 1, characterized in that: the phosphate is ammonium dihydrogen phosphate, potassium dihydrogen phosphate or sodium dihydrogen phosphate.

5. The steel slag-based polymetallic composite phosphate cement according to claim 1, characterized in that: the retarder is borax or glacial acetic acid.

Technical Field

The invention relates to steel slag-based multi-metal composite phosphate cement, belonging to the technical field of rapid repair of building materials.

Background

The steel slag is waste slag discharged in the steel making process, and the discharge amount is generally 10 to 15 percent of the yield of the crude steel; as a main byproduct of steel production, the steel slag of ChinaAnnual output is over 1 hundred million tons, but utilization rate is less than 30%; by 2018, the steel slag stacking quantity reaches 3 hundred million tons. Aiming at the treatment of steel slag, China mainly goes through three stages: in 1950 + 1970, the steel slag is in a placement stage, and the utilization rate of the steel slag is almost zero; in 2005, 1980-; in the comprehensive utilization stage in 2005, the disposal utilization rate of the steel slag is obviously improved, but still not more than 30%; at present, the comprehensive utilization of the steel slag mainly comprises metallurgy, agricultural application and CO₂Sealing, marine application, building and the like. Although the steel slag can be used in various fields such as metallurgy, agricultural application, marine application and the like, the application of the steel slag in the fields is limited due to the defects of immature technology, potential safety hazards and the like. At present, the preparation of building materials by using steel slag becomes a preferred scheme for bulk utilization, but the steel slag contains a large amount of calcium-silicon solid solution, magnesium-iron phase, calcium-iron phase and a certain amount of P₂O₅And free calcium oxide and magnesium oxide, so that the steel slag cannot be effectively utilized in the field of the traditional portland cement.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides steel slag-based polymetallic composite phosphate cement which comprises the following raw materials, by weight, 100 parts of steel slag, 15-50 parts of phosphate and 1-5 parts of retarder; the steel slag-based multi-metal composite phosphate cement prepared by the method is an inorganic cementing material taking phosphate as a main binding phase, and has the excellent performances of controllable condensation speed, fast hardening, early strength, fast low-temperature condensation speed, good wear resistance and frost resistance, small drying and the like; the cement is prepared by taking the industrial waste slag and the steel slag as raw materials, so that the material preparation cost is reduced, the environmental burden can be reduced, the resource recycling is facilitated, and a new way is provided for the efficient resource utilization of the steel slag.

The steel slag is ground and sieved by a 120-mesh sieve, and the sieve residue is less than 5 percent.

The steel slag is calcined at high temperature, and the calcining temperature is 500-800 ℃.

The retarder is borax or glacial acetic acid.

The phosphate is ammonium dihydrogen phosphate, potassium dihydrogen phosphate or sodium dihydrogen phosphate.

The maintenance mode of the steel slag-based polymetallic composite phosphate cement is natural maintenance or maintenance in a constant temperature and humidity maintenance box.

The invention has the advantages and beneficial effects that:

(1) the use method of the steel slag-based multi-metal composite phosphate cement is similar to that of common silicate, only water needs to be added, and the operation is simple;

(2) the steel slag and the phosphate are subjected to acid-base chemical reaction to form an inorganic cementing material taking the phosphate as a main binding phase, so that the material has the excellent performances of controllable condensation speed, high early strength, high low-temperature condensation speed, small volume deformation, wide environmental adaptability, high wear resistance, good freezing resistance and the like;

(3) the retarder is added, so that the reaction speed of the cement material can be adjusted, the solidification speed of the material is further improved, the operability of the material is improved, the construction difficulty is reduced, and the application prospect of the steel slag-based multi-metal composite phosphate cement is expanded;

(4) the phosphate cement is prepared by utilizing the composite metal phase in the steel slag, the preparation cost of the cement material is reduced, a new way is provided for the efficient resource utilization of the steel slag, and the method has certain environmental protection and economic benefits.

Drawings

FIG. 1 is an XRD pattern of steel slag powder;

FIG. 2 is an XRD pattern of a steel slag based multi-metal composite phosphate cement.

Detailed Description

The invention is described in more detail below with reference to the figures and examples, without limiting the scope of the invention.