CN103193403B - High-activity mud base concrete adulterant preparation method - Google Patents

High-activity mud base concrete adulterant preparation method Download PDF

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Publication number
CN103193403B
CN103193403B CN201310096194.5A CN201310096194A CN103193403B CN 103193403 B CN103193403 B CN 103193403B CN 201310096194 A CN201310096194 A CN 201310096194A CN 103193403 B CN103193403 B CN 103193403B
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China
Prior art keywords
concrete
red mud
coal gangue
cement
adulterant
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Expired - Fee Related
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CN201310096194.5A
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CN103193403A (en
Inventor
姬永生
朱蕊
徐亮
黄鹏
颜贵红
刘志勇
张领雷
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China University of Mining and Technology CUMT
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China University of Mining and Technology CUMT
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/10Production of cement, e.g. improving or optimising the production methods; Cement grinding

Abstract

A kind of high-activity mud base concrete adulterant preparation method, belongs to multiplicity reactivation mineral blended materials preparation method.Be main raw material with red mud, be aided with the industrial residue such as carbide slag, desulfurated plaster, by the combustion heat energy of unburned coal gangue self, the high-activity mud base concrete adulterant that thermal activation obtains is carried out to compound, in the process of mixing concrete material, the red mud matrix material that weight ratio according to 20% is prepared with the present invention replaces PO52.5, or PO42.5, or PC32.5 silicate cement, when other mixing materials are constant, mixing every cubic meter of concrete escapable cost 10-20 unit, the each age strength of concrete of institute's mixing all quite or higher than contrast concrete strength, and fresh concrete to have workability good, little loss of slump, hydration heat is low, the deferred property of later strength is good, resisting erosion of sulfate, resistance to chemical attack is strong, good endurance, concrete performance is had no adverse effect feature.

Description

High-activity mud base concrete adulterant preparation method
Technical field
The present invention relates to a kind of multiplicity reactivation mineral blended materials preparation method, particularly a kind of high-activity mud base concrete adulterant preparation method.
Background technology
Red mud produces the solid waste of discharging in alumina process.China is alumina producing big country, within 2009, produces 2,378 ten thousand tons, aluminum oxide, accounts for 30% of Gross World Product, nearly 3,000 ten thousand tons of the red mud of generation.Current China red mud comprehensive utilization ratio is only 4%, and accumulation volume of cargo in storage reaches 200,000,000 tons.Red mud is stored up in a large number, both land occupation, and waste resource, easily causes environmental pollution and potential safety hazard again.
Coal gangue is the waste rock be separated in coal mining and washing process, and coal gangue comprehensive discharge amount accounts for 10% one 20% of raw coal output, is one of maximum industrial solid castoff of the current quantity discharged of China.The coal stored up in a large number cashstone is not only the heavy burden of coal production, and also quite serious to the pollution of environment.In recent years, China utilizes the research of coal gangue to achieve certain progress in fields such as generating, agricultural fertilizer, Chemicals and building materials raw materials, but this does not fundamentally solve the present situation of coal gangue bulk deposition.
Unburned coal gangue does not almost have gelation activity, and at a proper temperature, the clay class component in coal gangue can become have amorphous silicon oxide and the aluminum oxide of hydraulic cement activity by kinetics.But because the calcium oxide content in coal gangue is very low, limit the degree that calcining improves its activity, therefore in calcination process, add the gelation activity that appropriate calcareous raw material effectively can improve coal gangue.Calcium oxide content in red mud from sintering process is higher, if it combined with coal gangue, then is aided with the calcium contents that the calcareous correction materials such as a small amount of carbide slag, desulfurated plaster can supplement coal gangue to a certain extent.
Summary of the invention
The object of the invention is to provide a kind of cement consumption improved in discarded red mud and coal gangue utilization ratio, protection of the environment, reduction concrete mixing process, increase economic efficiency and the high-activity mud base concrete adulterant preparation method of environmental benefit.
The object of the present invention is achieved like this: the raw material of the method composition and mass percent as follows: red mud 40-60%; Unburned coal gangue 25-45%; Carbide slag 10%; Desulfurated plaster 5%;
Preparation method comprises: drying, weigh batching and grinding hybrid technique, calcining process and application art, and concrete grammar process is as follows:
(1) drying, weigh batching and grinding hybrid technique: above-mentioned raw materials is dried and carried out weighing by above-mentioned formula and makes compound, then above-mentioned 4 kinds of raw materials are put into ball mill combined grinding to specific surface area >=600m2/kg;
(2) calcining process: utilize the combustion heat energy of unburned coal gangue self to carry out low temperature calcination to compound, calcining temperature is not less than 600 DEG C, then namely cooling obtains the red mud base concrete adulterant of activation fast in an atmosphere; The consumption of unburned coal gangue is within the scope of 25-45%, and be not less than 600 DEG C be as the criterion compound can be fired to, calcining temperature controls 600-800 DEG C of scope, and temperature is higher, and compound activity is larger;
(3) application art: the red mud base concrete adulterant after activation treatment and cement are fully mixed and namely forms red mud base composite Portland cement, or directly with the red mud base concrete adulterant after activation treatment, equal portions replacement is carried out to cement when prepared by concrete.
Described red mud is that sintering process, Bayer process or integrated process produce the industrial residue produced in aluminum oxide, wherein with the red mud best results that sintering process produces; Described unburned coal gangue is the waste rock that spontaneous combustion does not occur be separated in coal mining and washing process; Described carbide slag is in the product process such as industrial production acetylene gas, polyvinyl chloride, polyvinyl alcohol, the waste residue produced after calcium carbide hydrolysis; Described desulfurated plaster is carry out to sulfur-bearing feed coal, the rear flue gas produced of wet goods burning the industry by-product gypsum that desulfurizing and purifying process obtains, and requires that the grade of its dihydrate gypsum is greater than 90%.
Beneficial effect, owing to have employed such scheme, containing part β-C2S, C3A and amorphous aluminosilicate in red mud, thus makes it have certain potential gelation activity, utilizes the heat energy of coal gangue self to carry out calcination processing to it, its activity can be made greatly to improve.
1) high-strength morning strong, high substitution rate: the present invention produce activation red mud base concrete adulterant can reach 20 ~ 50% to the substitution rate of cement.This product has good corrosion to red mud active main body, red mud and cement can be made to carry out sufficient hydration reaction, compare with mineral admixture concretes such as traditional flyash, its early strength obtains larger raising, later strength is suitable with Portland cement concrete (PCC), overcomes the low critical defect of the ubiquitous early strength of conventional mineral adulterant and in concrete, substitutes the few shortcoming of cement.
2) production technique is simple, energy consumption is low: Production Flow Chart, the technological process of activation red mud base concrete adulterant are comparatively simple, and utilize unburned coal gangue for fuel, calcining temperature low (being not less than 600 DEG C), do not need additional fuel, energy consumption is low.
2) easy to use: the red mud base concrete adulterant after activation treatment and finished cement mixing can be processed into activation red mud base complex cement.Also the activation red mud base concrete adulterant can developed by this project when concrete mixing is according to a certain percentage to PO52.5, or PO42.5, or PC32.5 silicate cement carries out equivalent replace.Used in combination, simple, convenient with cement products, is conducive to suitability for industrialized production and applies.
3) plasticization effect is obvious: under identical cement consumption and water cement ratio situation, adds this product recommending volume, obviously can improve concrete workability, and increase concrete degree of compactness.
4) adaptability widely: various cement can be adapted to very well, and low alkali can not cause alkali to concrete, also can as required with the admixture meeting country and industry standard with the use of.Adapt to cement as silicate cement, ordinary Portland cement, Portland blast furnace slag cement, Portland pozzolana cement, Portland fly ash cement etc.
5) have no side effect: this product is nontoxic, odorless, do not fire, to the effect of reinforcing bar non-corroding.Agent on crack resistance of concrete chemical corrosivity can be increased substantially with quality concrete material (cement, coarse-fine aggregate, admixture) Application of composite, strengthen weather resistance.
6) significant economic benefit, environmental benefit and social benefit: employing industrial waste red mud, coal gangue are main raw material, not only can slow down cement manufacture to the raw-material too fast consumption of Wingdale, and can turn waste into wealth, all problem of environmental pollutions that successive elimination discards red mud, coal gangue brings.Material cost of the present invention is cheap to be easy to get, the cement substituting 20% by mixing every cube concrete calculates, cost-saved 10-20 unit, substitute for cement if there is the red mud of 2 ~ 300,000,000 tons to be activated every year, the economic benefit produced, environmental benefit and social benefit cannot be estimated.
Advantage: the present invention carries out thermal activation by the combustion heat energy of unburned coal gangue self to red mud and coal gangue, red mud and coal gangue lateral reactivity are fully ejected, substantially increase red mud and the volume of coal gangue in cement and concrete, the physical and mechanical property after the activation red mud base concrete adulterant equivalent substitution cement produced with it is suitable with plain cement.A large amount of substitute cement gelling material and be applied to the making of concrete mix; cement manufacture can be slowed down to the raw-material too fast consumption of Wingdale; turn waste into wealth; successive elimination discards all problem of environmental pollutions that red mud and coal gangue bring; improve the cement consumption in discarded red mud and coal gangue utilization ratio, protection of the environment, reduction concrete mixing process, there is significant economic benefit, environmental benefit and social benefit.
Embodiment
Embodiment 1: be main raw material with red mud, is aided with carbide slag, desulfurated plaster industrial residue, carries out the high-activity mud base concrete adulterant that thermal activation obtains by the combustion heat energy of unburned coal gangue self to compound; In the process of mixing concrete material, the red mud matrix material that the weight ratio according to 20% is prepared with the present invention replaces PO52.5, or PO42.5, or PC32.5 silicate cement.
The method raw material composition and mass percent as follows: red mud 40-60%; Unburned coal gangue 25-45%; Carbide slag 10%; Desulfurated plaster 5%;
Preparation method comprises: drying, weigh batching and grinding hybrid technique, calcining process and application art, and concrete grammar process is as follows:
(1) drying, weigh batching and grinding hybrid technique: above-mentioned raw materials is dried and carried out weighing by above-mentioned formula and makes compound, then above-mentioned 4 kinds of raw materials are put into ball mill combined grinding to specific surface area >=600m2/kg;
(2) calcining process: utilize the combustion heat energy of unburned coal gangue self to carry out low temperature calcination to compound, calcining temperature is not less than 600 DEG C, then namely cooling obtains the red mud base concrete adulterant of activation fast in an atmosphere; The consumption of unburned coal gangue is within the scope of 25-45%, and be not less than 600 DEG C be as the criterion compound can be fired to, calcining temperature controls 600-800 DEG C of scope, and temperature is higher, and compound activity is larger;
(3) application art: the red mud base concrete adulterant after activation treatment and cement are fully mixed and namely forms red mud base composite Portland cement, or directly with the red mud base concrete adulterant after activation treatment, equal portions replacement is carried out to cement when prepared by concrete.
Described red mud is that sintering process, Bayer process or integrated process produce the industrial residue produced in aluminum oxide, wherein with the red mud best results that sintering process produces; Described unburned coal gangue is the waste rock that spontaneous combustion does not occur be separated in coal mining and washing process; Described carbide slag is in the product process such as industrial production acetylene gas, polyvinyl chloride, polyvinyl alcohol, the waste residue produced after calcium carbide hydrolysis; Described desulfurated plaster is carry out to sulfur-bearing feed coal, the rear flue gas produced of wet goods burning the industry by-product gypsum that desulfurizing and purifying process obtains, and requires that the grade of its dihydrate gypsum is greater than 90%.

Claims (1)

1. a high-activity mud base concrete adulterant preparation method, is characterized in that: the raw material of the method composition and mass percent as follows: red mud 40-60%; Unburned coal gangue 25-45%; Carbide slag 10%; Desulfurated plaster 5%;
Preparation method comprises: drying, weigh batching and grinding hybrid technique, calcining process and application art, and concrete grammar process is as follows:
(1) drying, weigh batching and grinding hybrid technique: above-mentioned raw materials is dried and carried out weighing by above-mentioned formula and makes compound, then above-mentioned 4 kinds of raw materials are put into ball mill combined grinding to specific surface area>=600m 2/ kg;
(2) calcining process: utilize the combustion heat energy of unburned coal gangue self to carry out low temperature calcination to compound, then namely cooling obtains the red mud base concrete adulterant of activation fast in an atmosphere; The consumption of unburned coal gangue is within the scope of 25-45%, and calcining temperature controls 600-800 DEG C of scope, and this temperature range is higher, and compound activity is larger;
(3) application art: the red mud base concrete adulterant after activation treatment and cement are fully mixed and namely forms red mud base composite Portland cement, or directly with the red mud base concrete adulterant after activation treatment, equal portions replacement is carried out to cement when prepared by concrete;
Described red mud is that sintering process, Bayer process or integrated process produce in aluminum oxide the industrial residue produced, and described unburned coal gangue is the waste rock that spontaneous combustion does not occur be separated in coal mining and washing process; Described carbide slag is in industrial production acetylene gas, polyvinyl chloride, polyvinyl alcohol product process, the waste residue produced after calcium carbide hydrolysis; Described desulfurated plaster is carry out to the flue gas produced after sulfur-bearing feed coal, oil firing the industry by-product gypsum that desulfurizing and purifying process obtains, and requires that the grade of its dihydrate gypsum is greater than 90%.
CN201310096194.5A 2013-03-25 2013-03-25 High-activity mud base concrete adulterant preparation method Expired - Fee Related CN103193403B (en)

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Publication number Priority date Publication date Assignee Title
CN104058619B (en) * 2014-06-26 2016-01-27 尹小林 A kind of roasting waste gypsum and coal gangue produce the method for building materials and generating
CN104876627A (en) * 2014-09-22 2015-09-02 河北工程大学 Method for preparing aerated concrete from gangue and iron tailings
CN107056163A (en) * 2017-05-19 2017-08-18 辽宁坚峰实业有限公司 A kind of method that aluminum oxide industry waste material prepares concrete
CN108467234B (en) * 2018-04-03 2021-06-18 中国矿业大学 Rock mass fracture grouting material prepared from cement stone phase and preparation method
CN109534761A (en) * 2018-12-07 2019-03-29 中国矿业大学 A kind of red mud, aluminium ash base Unsteamed air-entrapping concrete and preparation method thereof
CN111320405A (en) * 2020-04-15 2020-06-23 浙江合力海科新材料股份有限公司 Solid hazardous waste base mineral admixture and preparation method thereof
CN112608054A (en) * 2021-01-19 2021-04-06 沈阳工业大学 High-silicon-content iron tailing multi-element activation composite admixture and preparation method thereof

Citations (1)

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Publication number Priority date Publication date Assignee Title
CN102718417A (en) * 2012-06-18 2012-10-10 河南理工大学 Preparation method for early strength cement admixture containing red mud or coal gangue

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102718417A (en) * 2012-06-18 2012-10-10 河南理工大学 Preparation method for early strength cement admixture containing red mud or coal gangue

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Inventor after: Ji Yongsheng

Inventor after: Zhu Rui

Inventor after: Xu Liang

Inventor after: Huang Peng

Inventor after: Yan Guihong

Inventor after: Liu Zhiyong

Inventor after: Zhang Linglei

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Inventor before: Qiao Wei

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Termination date: 20160325