CN103755166A

CN103755166A - Superfine slag powder prepared by doping steel slag into mineral slag

Info

Publication number: CN103755166A
Application number: CN201310724103.8A
Authority: CN
Inventors: 李喜才
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-12-25
Filing date: 2013-12-25
Publication date: 2014-04-30

Abstract

The invention relates to superfine slag powder prepared by doping steel slag into mineral slag. The steel slag is waste residues discharged in a steel-making process; a plenty of steel slag blending stocks are added in the process of producing the superfine slag powder so as to prepare the superfine slag powder. Main chemical components of the steel slag comprise 18%-25% of SiO2, 4%-10% of Al2O3, 15%-35% of Fe2O3, 31%-50% of CaO and 5%-15% of MgO. When the superfine slag powder is produced, 20%-25% of the steel slag is adopted and 5%-10% of an exciting agent is doped into equipment for grinding superfine powder or grinding the mineral slag; 7d and 28d active indexes of the superfine slag powder are improved by 2%-15% when being compared with the active index of previous superfine slag powder. The production of the superfine slag powder is realized by grinding the mineral slag into certain fineness (specific surface area) to have a certain activity and doping the mineral slag into cement or concrete, so as to improve the performance of buildings and reduce the production cost.

Description

Slag mixes slag slag micropowder processed

Technical field

The present invention relates to building materials field slag micropowder production technology, particularly improve slag micropowder activity index and reduce production material cost.

Background technology

Slag is the waste residue producing in steelmaking process, and slag belongs to inert material, is difficult for mill, and at present steel slag utilization rate is about 22%, and utilization ratio is low.Because activity is lower, the reasons such as preparation cost height, have restricted applying of steel-making slag powder.

At present both at home and abroad considerably less to the application of slag, still do not see slag and mix slag and produce the technology report of slag micropowder.

Depositing of slag takies a large amount of arable lands, causes environmental pollution, and utilizing in a large number slag is that national policy is supported and encourageed.

The present invention is that large steel slag mixes in slag and produces slag micropowder, can improve slag micropowder activity, and reduces slag micropowder production cost, improves concrete over-all properties.

Summary of the invention

The object of the invention is to be intended to overcome prior art defect, provide a kind of that by industrial residue, formed, can significantly reduce slag micropowder cost, improve slag micropowder quality, improve unit-hour output, can improve concrete over-all properties.

Goal of the invention of the present invention is achieved in that

A kind of slag mixes slag slag micropowder processed, and slag is the waste residue of discharging in steelmaking process, produces slag micropowder and mixes large steel slag adulterant, makes slag micropowder, its main chemical compositions of slag: SiO ₂18% ~ 25%, Al ₂o ₃4% ~ 10%, Fe ₂o ₃15% ~ 35%, CaO31% ~ 50%, MgO5% ~ 15%; While producing slag micropowder, mix 20%～25% slag, mix 5%～10% exciting agent at grinding micro mist or in the equipment of grinding slag, this slag micropowder 7d, 28d activity index improve 2%～15% than original slag micropowder activity index.

Producing slag micropowder mixes slag adulterant and presses weight percent composition: slag 70%～85%, slag 30%～15%.

Patent of the present invention has following beneficial effect:

1, the present invention can reduce material manufacturing cost;

2, the present invention can ensure the quality of products and do not reduce and be improved in original index, especially folding strength;

3, meet national industrial policies, turn waste into wealth.

Embodiment

Average approximately 70 yuan per ton of slag price, approximately 10 yuan per ton of slag freight charges prices.If do not consider other factors, manufacturing 1 ton of slag micropowder material cost is 70 yuan.

Utilize patented technology of the present invention, make 1 ton of slag micropowder material cost and be:

70 yuan/ton × 70%+10 yuan/ton × 30%=49 yuan/ton+3 yuan/ton=51 yuan/ton.

Utilize patent of the present invention: produce 1 ton of slag micropowder and can reduce by 19 yuan/ton of material costs.

See attached list

?mix slag breeze and do not mix slag breeze Experimental Comparison

In slag micropowder, mix a certain proportion of slag, not only reduce slag micropowder production cost, after hydration reaction, slag micropowder 7d, 28d activity index improve 2%～15%(according to materials quality relatively than the slag micropowder activity index of not mixing slag, generally improve more than 8%, reduce extremely individually 2%).Especially folding strength obviously improves, and 28d exceedes contrast sample bending strength of cement 1.2Mpa.

Claims

1. slag mixes a slag slag micropowder processed, and slag is the waste residue of discharging in steelmaking process, produces slag micropowder and mixes large steel slag adulterant, makes slag micropowder, its main chemical compositions of slag: SiO ₂18% ~ 25%, Al ₂o ₃4% ~ 10%, Fe ₂o ₃15% ~ 35%, CaO31% ~ 50%, MgO5% ~ 15%; While producing slag micropowder, mix 20%～25% slag, mix 5%～10% exciting agent at grinding micro mist or in the equipment of grinding slag, this slag micropowder 7d, 28d activity index improve 2%～15% than original slag micropowder activity index.