Composite cement producing process with flyash in great mixed amount

A technology for compounding cement and fly ash, applied in cement production, sustainable waste treatment, solid waste management, etc., can solve the problems of high cost, large-scale reuse of fly ash without major breakthroughs, etc., and achieve stable and reliable performance. , the effect of saving cement clinker and reducing pollution

Inactive Publication Date: 2005-04-20
陈忠新
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, due to technical limitations, there has been no major breakthrough in the large-scale reuse of fly ash
On the other hand, the production of the six general-purpose cements in my country requires Portland cement clinker, and every ton of Portland cement clinker produced emits 0.9 tons of carbon dioxide into the atmosphere, and the cost is relatively high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1. First produce fly ash aggregate. Put into formula raw material according to following percentage by weight:

[0018] Fly Ash 65, Triethanolamine 20, Calcium Nitrate 5,

[0019] caustic soda 5, anhydrous sodium sulfate 5,

[0020] Put these raw materials into the mill and grind them into ultra-fine powder;

[0021] 2. Crush the Portland cement clinker, grind it into the bin;

[0022] 3. Mix the formula according to the following percentage by weight, and put it into the mill to make the product.

[0023] Pre-ground clinker 50, fly ash 40,

[0024] Gypsum 3, fly ash aggregate 1,

[0025] Slag 6.

Embodiment 2

[0027] 1. Production of fly ash aggregates. Put into formula raw material according to following percentage by weight:

[0028] Fly Ash 58, Ethylenediamine 24, Calcium Nitrate 5,

[0029] caustic soda 7, anhydrous sodium sulfate 6,

[0030] Grind these raw materials into ultra-fine powder;

[0031] 2. Crush the Portland cement clinker, grind it into the bin;

[0032] 3. Mix the formula according to the following percentage by weight, and put it into the mill to make the product.

[0033] Pre-ground clinker 53, fly ash 38,

[0034] Gypsum 3, fly ash aggregate 1,

[0035] Slag 5.

Embodiment 3

[0037] 1. Production of fly ash aggregates. Put into formula raw material according to following percentage by weight:

[0038] Fly Ash 65, Diamine 17, Calcium Nitrate 6,

[0039] caustic soda 7, anhydrous sodium sulfate 5,

[0040] Put these raw materials into the mill and grind them into ultra-fine powder;

[0041] 2. Crush the Portland cement clinker, grind it into the bin;

[0042] 3. Mix the formula according to the following percentage by weight, and put it into the mill to make the product.

[0043] Pre-ground clinker 48, fly ash 40,

[0044] Gypsum 3, fly ash aggregate 1,

[0045] Slag 8.

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PUM

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Abstract

The present invention is composite cement producing process with flyash in great mixed amount, and aims at solving the problems of flyash to occupy land and pollute environment, cement production of Portland cement clinker to produce great amount of CO2 and have high cost, etc. The composite cement producing process includes producing flyash polymerizing material with flyash, grinding assistant,calcium nitrate, caustic soda and anhydrous sodium sulfate and through grinding; crushing clinker; and producing cement product with clinker, flyash, gypsum, flyash polymerizing material and mineral slag. Using great amount of flyash in producing cement can reduce environmental pollution and lower cement producing cost.

Description

technical background [0001] The invention belongs to a cement production method, in particular to a method for producing composite cement with a large amount of fly ash. Background technique [0002] Fly ash is a waste material discharged from coal-fired thermal power plants or thermal power plants. There are many coal-fired thermal power plants and coal-fired thermal power plants in northern my country, so the discharge of fly ash is very large. From the perspective of Liaoning Province alone, the annual ash discharge is more than 10 million tons, and the accumulation over the years has exceeded million tons, while the utilization rate of fly ash is only about 20%. A large amount of fly ash is discharged without any effective treatment, occupying cultivated land, polluting water sources, and polluting the environment. Turning waste into treasure is a serious issue that nature presents to us. At present, due to technical limitations, there has been no major breakthrough in t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/14C04B7/26C04B18/08C04B18/10
CPCY02P40/10Y02W30/91
Inventor 陈忠新
Owner 陈忠新
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