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Method for preparing flyash cement

A technology of fly ash cement and fly ash, which is applied in the field of building materials, can solve the problems of low cement quality, unreasonable proportioning, use restrictions, etc., and achieve the effect of high quality, excellent quality and good benefit

Inactive Publication Date: 2009-02-25
DENGDIAN GROUP CEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practice, fly ash is also used to produce cement, but due to the use of conventional equipment and old production processes, the ingredients are not very scientific and reasonable, and the addition of fly ash is less and the proportion is unreasonable, so that the produced cement Poor quality and very limited use

Method used

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  • Method for preparing flyash cement

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A. Preparation of clinker:

[0017] ①. First, take 8% of high loss on ignition fly ash, 2% of iron powder, 71% of limestone, 8% of sandstone siliceous raw material, 1% of steel slag and 10% of yellow coal by weight percentage; wherein high loss of ignition fly ash is AL 2 o 3 Fly ash with a content of 6.42% and a loss on ignition of more than 8%, SO in yellow coal 3 The content is 2.34%;

[0018] ②. Mix, pulverize and dry the above raw materials;

[0019] ③. Send the dried raw materials into the mill for fine grinding;

[0020] ④, and then transport the powdered material obtained after fine grinding to the continuous homogenization field for homogenization;

[0021] ⑤. Add water to the homogenized raw material to make a spherical body, send it to a kiln for calcination at a temperature of 1300-1400 °C, and then become clinker;

[0022] B. Preparation of finished products:

[0023] 1. Get 67% of the clinker prepared in step A, 32% of low loss on ignition fly ash a...

Embodiment 2

[0026] A. Preparation of clinker:

[0027] ①. First, take 9.5% high loss on ignition fly ash, 2.5% iron powder, 74% limestone, 5% sandstone siliceous raw material, 1% steel slag and 8% yellow coal by weight percentage; wherein high loss on ignition fly ash is AL 2 o 3 Fly ash with a content of 6.42% and a loss on ignition of more than 8%, SO in yellow coal 3 The content is 2.34%;

[0028] ②. Mix, pulverize and dry the above raw materials;

[0029] ③. Send the dried raw materials into the mill for fine grinding;

[0030] ④, and then transport the powdered material obtained after fine grinding to the continuous homogenization field for homogenization;

[0031] ⑤. Add water to the homogenized raw material to make a spherical body, send it to a kiln for calcination at a temperature of 1300-1400 °C, and then become clinker;

[0032] B. Preparation of finished products:

[0033] 1. Get 67% of the clinker prepared in step A, 30% of low ignition loss fly ash and 3% of gypsum wi...

Embodiment 3

[0036] A. Preparation of clinker:

[0037] ①, first take high loss on ignition fly ash 7%, iron powder 3%, limestone 72.5%, sandstone siliceous raw material 5%, steel slag 1.5% and yellow coal 11% by weight percentage; wherein high loss on ignition fly ash is AL 2 o 3 Fly ash with a content of 6.42% and a loss on ignition of more than 8%, SO in yellow coal 3 The content is 2.34%;

[0038] ②. Mix, pulverize and dry the above raw materials;

[0039] ③. Send the dried raw materials into the mill for fine grinding;

[0040] ④, and then transport the powdered material obtained after fine grinding to the continuous homogenization field for homogenization;

[0041] ⑤. Add water to the homogenized raw material to make a spherical body, send it to a kiln for calcination at a temperature of 1300-1400 °C, and then become clinker;

[0042] B. Preparation of finished products:

[0043] 1. Get 70% of the clinker prepared in step A, 27% of low loss on ignition fly ash and 3% of gypsum...

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Abstract

A method for preparing pulverized ash cement is characterized in that the preparation method comprises the following steps: A. clinker preparation: (1) firstly, according to weight percentages, 6 to 10% of high ignition loss pulverized ash, 2 to 3% of ferrous powder, 65.5 to 80% of limestone, 3 to 8% of sandstone silicious raw materials, 1 to 1.5% of steel slag and 8 to 12% of yellow coal are weighted; (2) the raw materials are mixed, pulverized and baked; (3) the baked raw materials are fed in a grinder to be finely ground; (4) the powdery materials which are finely ground are conveyed to a continuous homogenization field and are homogenized; (5) after water is added in the homogenized raw materials, the homogenized raw materials are fed in a kiln and are calcined to obtain the clinker; B. finished product preparation: (1) according to weight percentages, 56 to 75% of the clinker prepared by the step A, 25 to 38% of low ignition loss pulverized ash and 1 to 6% of gypsum are weighted; (2) the raw materials are mixed and are milled by a superfine cement mill; and then, a finished product is obtained.

Description

technical field [0001] The invention relates to a building material, in particular to a preparation method of fly ash cement produced by the "two-high and three-point superfine method". Background technique [0002] Cement is a building material that is commonly used and used in large quantities, but now most manufacturers are firing it by adding clay and other raw materials. However, with the development of thermal power in our country, more and more fly ash will be discharged from power plants, which not only restricts the development of electric power, but also endangers the physical and mental health of human beings, and causes a lot of waste of resources. Therefore, the comprehensive utilization of fly ash has always been a problem that people need to solve urgently. In practice, fly ash is also used to produce cement, but due to the use of conventional equipment and old production processes, the ingredients are not very scientific and reasonable, and the addition of f...

Claims

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Application Information

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IPC IPC(8): C04B7/147
CPCC04B7/26Y02P40/10Y02P40/121C04B7/34C04B7/38
Inventor 李西中刘迎忠郎辰芳屈卫东张广浩郭文杰王朝阳
Owner DENGDIAN GROUP CEMENT
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