Cement produced from industrial solid wastes

An industrial solid waste and cement technology, applied in cement production and other directions, can solve the problems of large carbon dioxide emissions, large proportion of clinker, low strength, etc., and achieves reduction of stacking sites, high cement strength, and good acid and alkali corrosion resistance. Effect

Active Publication Date: 2019-06-21
西卓子山草原水泥集团包头三固有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems of large proportion of clinker in the prior art, large carbon dioxide emissions, low strength, and high energy consumption in the production process, the invention provides a cement produced by using industrial solid waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation:

[0028] The raw materials are crushed, mixed according to the proportion, and directly ground into cement.

[0029] In parts by weight, raw material composition:

[0030] Cement clinker 19.9%; desulfurized gypsum 5%; slag 20%; fly ash 55%; alkaline compound admixture 0.1%. Among them, the alkaline compound additive has a pH of 11 and consists of triethanolamine, polyethylene glycol, calcium formate, alkaline water (sodium thiosulfate and sodium hydroxide aqueous solution with a pH of 10), and industrial salt. In parts by weight, (triethanolamine+polyethylene glycol+calcium formate): alkaline water: industrial salt=1:1.5:0.5, wherein triethanolamine accounts for the total amount of triethanolamine, polyethylene glycol and calcium formate 5%, polyethylene glycol accounts for 75% of the total amount of the three, and calcium formate accounts for 20%.

Embodiment 2

[0032] Preparation:

[0033] The raw materials are crushed, mixed according to the proportion, and directly ground into cement.

[0034] In parts by weight, raw material composition:

[0035] Cement clinker 14.9%; desulfurized gypsum 5%; steel slag 20%; sulfur-fixing ash 60%; alkaline compound admixture 0.1%. Wherein, the alkaline compound admixture pH=12, it is composed of: triethanolamine, polypropylene glycol, calcium formate, alkaline water (sodium thiosulfate and sodium bicarbonate aqueous solution, industrial salt of pH=12; by weight, (triethanolamine+polypropylene glycol+calcium formate): alkaline water: industrial salt=1:1.5:0.5, wherein, triethanolamine accounts for 10% of the total amount of triethanolamine, polypropylene glycol, and calcium formate, and polypropylene glycol accounts for the total amount of the three Amount of 85%, calcium formate accounted for 5%.

Embodiment 3

[0037] Preparation:

[0038] The raw materials are crushed, mixed according to the proportion, and directly ground into cement.

[0039] In parts by weight, raw material composition:

[0040] Cement clinker 29.9%; calcined coal gangue 5%; sulfur-fixing slag 20%; fly ash 45%; alkaline compound admixture 0.1%. Wherein, the alkaline composite admixture pH=11 is composed of: triethanolamine, polytetramethylene glycol, calcium formate, alkaline water (sodium thiosulfate and sodium hydroxide aqueous solution of pH=10), industrial salt; by weight In terms of parts, (triethanolamine+polytetramethylene glycol+calcium formate): alkaline water: industrial salt=1:1.5:0.5, wherein triethanolamine accounts for 5% of the total amount of triethanolamine, polytetramethylene glycol, and calcium formate , polytetramethylene glycol accounts for 85% of the total of the three, and calcium formate accounts for 10%.

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Abstract

The invention relates to cement produced from industrial solid wastes. The cement is prepared from cement clinker, the industrial solid wastes and a composite alkaline additive. The composite alkalineadditive consists of triethanolamine, polymeric polyol, calcium formate, alkaline water and industrial salt. The obtained cement has the advantages of high compressive strength, acid and alkali corrosion resistance and the like under the conditions of proper raw material specific composition and proper proportion, and the preparation method is simple to operate, easy to industrialize, good in application prospect and suitable for industrial production and application.

Description

technical field [0001] The invention relates to the field of building materials, in particular to cement produced by utilizing industrial solid waste. Background technique [0002] Cement is an indispensable material in construction and is widely used in industrial and civil buildings. The production process and formula of traditional cement are still based on cement clinker, with an approximate dosage of 45%-80%. For general-purpose cement with a strength of 42.5MPa, the amount of clinker is more than 75%; for general-purpose cement with a strength of 32.5MPa, the amount of clinker is 45%-55%, and a certain amount of admixture is added to the rest. The specific surface area of ​​cement is about 400cm 2 / kg. The process consumes a lot of energy, and about 40% of carbon dioxide is emitted during the cement clinker calcination process, seriously polluting the environment. [0003] Invention patent application CN107473613A discloses a kind of cement produced by utilizing in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/24C04B7/26C04B28/14
CPCY02P40/10
Inventor 彭青山
Owner 西卓子山草原水泥集团包头三固有限责任公司
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