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Cement production method

A production method and cement technology, applied in cement production, clinker production, etc., can solve the problems of unfavorable environmental protection, high production cost, and low efficiency, and achieve the effects of increasing the output of the machine, occupying a small area, and simplifying the process

Active Publication Date: 2013-07-24
GUANGXI YUFENG CEMENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a simple, efficient, and uniformly mixed method for preparing admixture cement, which can solve the problems of existing admixture cement production processes, high production costs, low efficiency and disadvantages for environmental protection. The problem

Method used

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  • Cement production method

Examples

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Embodiment 1

[0025] The cement that present embodiment produces PⅡ42.5 comprises the preparation material of following percentage by weight: cement clinker 83.3%, gypsum 4.2%, limestone 4.5%, slag micropowder 8%, and its production method comprises the following steps:

[0026] A. Use high-fine grinding ball mill to pre-grind slag to form slag powder, and the specific surface area of ​​slag powder is controlled at 440m 2 / kg, 45μm sieve ≤ 1.0%, send the slag fine powder to the silo for standby;

[0027] B. After weighing the cement clinker, gypsum and limestone calculated according to the above raw material ratio with a feeding scale, put them into a ball mill and mix and grind them until the specific surface area is 345 m 2 / kg, 80μm sieve ≤ 3.2%, 45μm sieve ≤ 17.0%;

[0028] C. Send the fine powder milled in step B into the air conveying chute placed at the end of the grinding process. At the same time, the slag fine powder calculated according to the above raw material ratio is passed th...

Embodiment 2

[0033] The cement that present embodiment produces P.O42.5 comprises the preparation material of following percentage by weight: cement clinker 72.2%, gypsum 4.8%, limestone 7%, slag micropowder 16%, and its production method comprises the following steps:

[0034] A. Use high-fine grinding ball mill to pre-grind slag to form slag powder, and the specific surface area of ​​slag powder is controlled at 440m 2 / kg, 45μm sieve ≤ 1.0%, send the slag fine powder to the silo for standby;

[0035] B. After weighing the cement clinker, gypsum and limestone calculated according to the ratio of the above raw materials with a feeding scale, put them into the ball mill together and mix and grind until the sieve residue of 80 μm is ≤3.0%;

[0036] C. Send the fine powder milled in step B into the air conveying chute placed at the end of the grinding process. At the same time, the slag fine powder calculated according to the above raw material ratio is passed through the reamer conveyor fro...

Embodiment 3

[0041] The cement of present embodiment production P.O52.5 comprises the compounded material of following percentage by weight: cement clinker 87.2%, gypsum 4.3%, limestone 3.5%, slag micropowder 5%, and its production method comprises the following steps:

[0042] A. Use a high-fine grinding ball mill to pre-grind the slag to form slag powder. The fineness of the slag powder is controlled at 45 μm and the sieve ≤ 1.0%, and the slag powder is sent to the silo for standby;

[0043] B. After weighing the cement clinker, gypsum and limestone calculated according to the ratio of the above raw materials with a feeding scale, put them into the ball mill together for mixing and grinding until the specific surface area is 365m 2 / kg, 80μm sieve ≤ 3.0%, 45μm sieve ≤ 17.0%;

[0044] C. Send the fine powder milled in step B into the air conveying chute placed at the end of the grinding process. At the same time, the slag fine powder calculated according to the above raw material ratio is...

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Abstract

The invention discloses a cement production method, relating to the technical field of cement production. The cement production method disclosed by the invention comprises the following steps of: pre-grinding slag to form superfine slag powder for later use; proportioning cement clinker, gypsum and limestone and grinding in a ball mill; feeding grinded fine powder into an air conveying inclined groove at the tail part of the mill, and mixing the fine powder with the superfine slag powder; conveying the mixed material by using a pneumatic hoister, and feeding formed mixed powder into a small storage cabin; and opening a feeding valve and an exhaust valve of a cabin pump, so that the mixed powder in the small storage cabin enters the pump body, when the weight of the mixed powder in the pump body is up to a pre-set value, closing the feeding valve and the exhaust valve, opening a fluidizing valve and a conveying valve after delaying for 8s, and feeding the mixed powder into a finished product storeroom after sufficiently and uniformly mixing through a conveying pipeline. Compared with the prior art, the cement production method disclosed by the invention has the advantages that the method is simple and easy; the production efficiency is high; the mixing effect is better; activity of mixed materials is sufficiently excited; the mixed materials are high in admixture amount; the production cost is low; and produced cement is high in intensity, steady in quality and high in yield.

Description

technical field [0001] The invention relates to the technical field of cement production, in particular to a method for preparing cement mixed with mixed materials. Background technique [0002] In the process of cement production, mineral materials added to cement to improve cement performance and adjust cement grade are called cement admixtures. Slag is an important cement mixing material commonly used in cement production. Adding slag to cement can not only make full use of industrial solid waste produced by granulating blast furnaces, but also reduce the amount of cement clinker, thereby reducing production costs. The traditional cement preparation method is generally to add slag, cement clinker, limestone and gypsum to a ball mill for grinding together in a certain proportion. By changing the ratio of clinker and slag and the grinding fineness of cement, different grades of cement can be produced. of cement. However, the grindability of slag is very poor. When grindin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/36C04B7/153
CPCY02P40/10Y02P40/121
Inventor 梁茂华黄志安隆盛康潘卫平龙立辉詹智良李铁彬梁景怀黄绍东陈黔韦阮威张芳
Owner GUANGXI YUFENG CEMENT
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