Production process with modified fly ash to replace cement clinker

A technology of cement clinker, production method, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., capable of solving problems such as no solution

Inactive Publication Date: 2007-01-03
葛东海
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Because of the real use value of fly ash, so far there is no technically and economically feasible solution

Method used

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Embodiment Construction

[0040] A production method for replacing cement clinker with fly ash modification, which is characterized in that: in the process of electric power production, a high temperature combustion environment of 1300-1500° C. of coal powder in a supersaturated CaO fine powder environment is created, that is, coal powder In the process of burning in a high temperature combustion chamber of 1300-1500℃ or on a fumed bed, a sufficient amount of CaO directly participates in the mineral reorganization of the pulverized coal burning residue to activate the solid melting of the pulverized coal burning residue fly ash-aluminosilicate oxide The physical and chemical activity of the body, so that the generated aluminosilicate minerals are mainly C 3 S, C 2 S, C 3 A.C 4 AF, the fly ash generated by the above modification has the physical and chemical properties of cement clinker, which can replace cement clinker to produce national standard cement, or replace high alumina fly ash sintering bas...

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Abstract

The present invention discloses production process with modified fly ash to replace cement clinker. During power generation, coal powder is made to burn at 1300-1500 deg.c high temperature condition with oversaturated fine CaO powder, so that CaO can take part in the mineral recombination of coal powder burning remainder to activate the physical and chemical activity of aluminosilicate solid solution as the burning product and generate aluminosilicate mineral containing C3S, C2S, C3A and C4AF. The produced aluminosilicate mineral has the physical and chemical characteristics of cement clinker or high aluminum fly ash sintering base material, and may be used to replace common cement clinker or high aluminum fly ash sintering base material. The present invention can lower the slag treating cost in power generation and produce cement substitute.

Description

Technical field [0001] The invention relates to a production method for replacing cement clinker with fly ash modification. Background technique [0002] With the rapid growth of power demand and the large-scale power production equipment, it is still a difficult problem to make better use of fly ash, the burning residue discharged from power production. At present, my country's power production slag discharge is based on 10 tons of coal slag discharge of 250-300 kg, and the annual discharge of fly ash is about 9 × 10 7 Tons or so, only 40-50% of the total is used, and about 5 × 10 7 Tons of fly ash are discarded and piled up on land, which increases production expenses for power production enterprises and also pollutes the environment. This part of the fly ash that is used is only used as a filler for the production of cement, (chemical fertilizer) organic compound fertilizer, and a filler ingredient for cement blocks. Because of the real use value of fly ash, there is n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/08C04B20/04C04B7/24
CPCC04B18/08Y02W30/91C04B20/04C04B22/064
Inventor 葛东海葛拥军
Owner 葛东海
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