CN110436802A

CN110436802A - A kind of production technology of new concrete

Info

Publication number: CN110436802A
Application number: CN201810414874.XA
Authority: CN
Inventors: 黄兆达
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-05-03
Filing date: 2018-05-03
Publication date: 2019-11-12

Abstract

Cement in new concrete of the invention is using steel slag, slag, Portland clinker as primary raw material.Since activity of steel slag is low, hardness is big, is difficult to be crushed, it is low more than slag utilization rate, the present invention using tertiary crushing, three times magnetic separation, closed circuit pre-grinding, material separate grinding new process, reduce steel slag enters abrasive grain diameter and containing amount of metal, the activity of steel slag is chemically inspired, then plus sand, masonry aggregate the disadvantage that slag cement early strength is low, setting time is long is overcome, produces 425 slag cements steadily in the long term,；It is equipped with existing concrete mixing ratio again with water (additive and admixture can be contained): setting laboratory's match ratio are as follows: cement: water: sand: stone=1:x:y:z, live sand moisture content is m, stone moisture content is n, then construction proportion design are as follows: 1:(x-y*m-z*n): y*(1+m): z*(1+n), mixed configuration concrete.Cooperate by a certain percentage, it is agitated obtained by cement concrete, form a kind of new concrete.It is widely used in civil engineering.

Description

A kind of production technology of new concrete

Technical field

The industrial waste residue disposal technology of technical field of cement production.Cooperation existing concrete ratio forms a kind of novel coagulation Soil.

Background technique

Steel slag is the solid slag being discharged in steelmaking process, and the whole nation will be about 100,000,000 tons of discharge every year.Because of activity of steel slag Low, hardness is big, be difficult to be crushed, is difficult to that grinding, chemical analysis fluctuation is big, stability is poor, is never utilized well.Greatly The steel slag of amount stockpiling also causes serious pollution to the environment on cinder field periphery with not only taking up farmland soil.How these are utilized Steel slag reduces the pollution to environment, is always the project of steel and iron industry and cement industry engineers and technicians research.More than 30 Nian Qian, Sun Shushan teaching inventive using steel slag production slag cement new process.Steel slag and Portland clinker have phase As mineral composition, be a kind of cementitious material with potential activity.As long as using activation method appropriate to steel slag at Reason is to excite its activity, so that it may and overcome the disadvantage that slag cement early strength is low, setting time is long, and improves its stability, With this by Comprehensive Utilization of Steel Slag.A large amount of steel slag can be used for manufacturing slag cement, and steel-making slag powder is mixed in concrete, will be significantly improved Its comprehensive performance, especially durability.This can not only efficiently solve pollution problem of the steel slag to environment, but also can solve Certainly energy-saving, the reduction CO2 of building materials industry are discharged, are reduced the problems such as cost.This has pole to realization social sustainable development Important meaning, while this is also the low-carbon economy based on low energy consumption, low emission, low pollution that the present whole world is unanimously recommended Mode.

Summary of the invention

The purpose of the invention is to more effectively economize on resources, develop and use steel slag, make Comprehensive Utilization of Steel Slag, change give up into Treasured is developed and used to more high added value by high-tech means and is converted, and is eliminated pollution of the steel slag to surrounding enviroment, is provided a kind of life Production. art is simple, at low cost, early strength and setting time all meet the high steel slag water of standard GB/T 13590-2006, intensity The production method of mud, then plus sand, masonry aggregate；Existing concrete is equipped with again with water (additive and admixture can be contained) to mix Than:

1:(x-y*m-z*n): y*(1+m): z*(1+n)

If laboratory's match ratio are as follows: cement: water: sand: stone=1:x:y:z, live sand moisture content are m, and stone moisture content is n。

Cooperate by a certain percentage, it is agitated obtained by cement concrete, form a kind of new concrete.

In order to solve the above-mentioned technical problem used technical solution.

The formula range of slag cement of the invention are as follows:

Steel slag: 30%-40% granulated blast-furnace slag: 25%-50% Portland clinker: 20%-30%

Gypsum (after processing): 4%-6% grinding aid: 1%

Present invention beneficial effect obtained.Slag cement of the invention uses steel slag in large quantities, solves steel slag stockpiling and invades The problem of accounting for agricultural land, pollution surrounding enviroment, has saved lime stone, coal resources, reduces the CO2 discharge of 30%-40%, Processing industrial residue is received to have found an effective way for cement industry, for the green cement for low-carbon mode of developing a circular economy Provide advanced production method.A kind of crusher of novel structural principle is designed, the big material of hard, polishing machine can be broken It is broken for the finished product of more fine particle size or the raw material of further deep processing.It is equipped with existing concrete mixed proportion again:

1:(x-y*m-z*n): y*(1+m): z*(1+n)

Form a kind of new concrete.

Specific embodiment

The hardness of steel slag is bigger, Mohs' hardness 6-7, and slag steel grit is wrapped in slag.Therefore, be crushed with grinding all compared with Difficulty, and steel slag particle size directly affects the yield and grinding fineness of slag cement, used in production tertiary crushing and Magnetic separation three times adds closed circuit pre- grinding system.After system processing, greatly reduce steel slag enters abrasive grain diameter and tenor, The burden for alleviating grinding machine, shortens grinding time, improves the yield and quality of cement grinding mill, reduces energy consumption.By steel slag list Only grinding is stored in warehouse for finished product to the fineness for meeting technique requirement.

When granulated blast-furnace slag is the slag quenching of blast furnace ironmaking melting, have little time to crystallize and the glassy state that is largely formed Substance, main ingredient are made of CaO, MgO, SiO2, Al2O3, account for 95% or more of total weight altogether, it is with higher potential Activity.K value is bigger, and activity is higher.Wet slag water content into factory is bigger, generally between 18%-25%, needs with drying Machine dry then storage storage.Slag grindability is poor, is difficult levigate when with Portland clinker intergrinding, and institute is previous It is past partially thick, so that the activity of slag is difficult to play, it is therefore desirable to slag individually be carried out grinding, to reach the thin of technique requirement Degree.

Will treated broken gypsum, intergrinding after mix with clinker, grinding aid reaches the fineness of qualification, then by three Qualified material after kind separate compiling is uniformly mixed into slag cement in proportion.Following table show this kind of 425# slag cement and delivers The empirical results of St Cement Q Supervision & Testing Center.

After cement quality survey report is qualified, it is equipped with existing concrete mixed proportion:

1:(x-y*m-z*n): y*(1+m): z*(1+n)

Form a kind of new concrete.

Certainly, above is representative instance of the invention, and in addition to this, the present invention can also have other a variety of specific embodiment parties Formula, all technical solutions formed using equivalent substitution or equivalent transformation, is all fallen within the scope of protection of present invention.

Claims

1. the slag cement in the present invention belongs to the industrial waste residue disposal technology of technical field of cement production, it is characterized in that by steel Grinding forms by a certain percentage for slag, slag, Portland clinker, treated gypsum and grinding aid.

2. slag cement is it is characterized in that: steel slag goal after tertiary crushing, three times magnetic separation and closed circuit pre-grinding according to claim 1 Grinding machine separate grinding, slag enter grinding machine separate grinding after drying, Portland clinker, treated gypsum and grinding aid into Then all materials are uniformly mixed into slag cement by intergrinding after row mixing.

3. steel slag 425# cement is it is characterized in that: steel slag 30%-40%, slag 40%-50%, silicate cement according to claim 1 Mud clinker 20%-30%, treated gypsum 4%-6%, grinding aid 1% are uniformly mixed into slag cement after grinding in proportion；

According to appropriate adjustment step:

If laboratory's match ratio are as follows: cement: water: sand: stone=1:x:y:z, live sand moisture content are m, and stone moisture content is N, then construction proportion design are as follows: 1:(x-y*m-z*n): y*(1+m): z*(1+n), mixed configuration concrete.