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Preparation process of white cement

A preparation process, white cement technology, applied in the field of white cement preparation process, can solve the problems of reducing clinker output, reducing product appearance, fast solidification, etc., and achieves the effect of reducing quality fluctuation, reducing labor consumption, and simple preparation method

Inactive Publication Date: 2012-03-28
HENAN WANXING SPECIAL CEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] White Portland cement, referred to as white cement, is a kind of cement, but its grade is higher than ordinary Portland cement, and it solidifies faster. Its main characteristics are that the amount of slag powder is 85-90%, and the amount of alkaline additives is No more than 5%. White cement is mostly used for decoration. It is mainly used for pointing joints between white porcelain sheets. Due to its weak strength, it cannot be used for wall painting
[0003] As an independent product of special cement, white cement not only requires high-quality raw material and fuel, but also requires stricter management and production technology. The two most important indicators of white cement are whiteness and strength. White cement, most of which have poor whiteness, poor color and low strength and quality, has poor effect when used for jointing between white porcelain sheets, which reduces the appearance of the product, and the preparation process of white cement is complicated, which wastes a lot of resources in the preparation process and increases production. cost, labor benefit
[0004] In the two cooling processes of rapid cooling in the past, in order to quickly lower the temperature of the clinker, the temperature during the raw meal firing process is below 1500 degrees, which reduces the output of the clinker, and the cooling time is increased by sub-cooling. Oxidize the clinker with the oxygen in the air, thereby reducing the whiteness of the clinker and failing to achieve the desired effect

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  • Preparation process of white cement
  • Preparation process of white cement

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preparation example Construction

[0023] A kind of preparation technology of white cement, its preparation technology is:

[0024] Step 1. Take 70%-75% of limestone, 20%-25% of siliceous stone and 5% of pyrophyllite by weight percentage, put the limestone, siliceous stone and pyrophyllite into the jaw crusher respectively, and crush them to 2-4cm particles , the calcium content of the limestone is 50%-70%, the silicon content of the chert is 9%-10%, and the chlorine content of the pyrophyllite is 50%-70%;

[0025] Step 2. Put the crushed particles in step 1 into a vertical raw meal mill, grind to 250-300 mesh, take them out and send them to storage tanks, homogenize for 68-78 hours, and take them out;

[0026] Step 3. Put the homogenized raw materials in step 2 into the raw material bin for mixing, take out the mixed raw materials and send them to the storage tank again, homogenize for 72-80 hours, then take them out and send them to the hollow rotary kiln , firing at a temperature of 1500-1800°C for 12-48 ho...

Embodiment 1

[0035] Step 1, get limestone 70%, siliceous stone 25% and pyrophyllite 5% by weight percentage, limestone, siliceous stone and pyrophyllite are put into jaw crusher respectively, be broken into the particle of 2cm, the calcium content of described limestone is 50%, the silicon content of chert is 9%, and the chlorine content of pyrophyllite is 50%;

[0036] Step 2. Put the crushed particles in step 1 into the vertical raw meal mill respectively, and grind them to 250 meshes. After testing, the calcium content in the crushed limestone particles is 50%, and the silicon content in the siliceous stone is 50%. is 9%, and the chlorine content in the pyrophyllite is 50%, which is then sent to the storage tank respectively, homogenized for 68 hours, and taken out;

[0037] Step 3. Put the raw materials homogenized in step 2 into the raw material bin for mixing, take out the mixed raw materials and send them to the storage tank again, and homogenize them for 72 hours. After testing, th...

Embodiment 2

[0042] Step 1, get limestone 73%, siliceous stone 22% and pyrophyllite 5% by weight percentage, limestone, siliceous stone and pyrophyllite are put into jaw crusher respectively, be broken into the particle of 3cm, the calcium content of described limestone 60%, the silicon content of chert is 10%, and the chlorine content of pyrophyllite is 60%;

[0043] Step 2. Put the crushed particles in step 1 into the vertical raw meal mill respectively, and grind them to 280 meshes. After testing, the calcium content in the crushed limestone particles is 60%, and the silicon content in the siliceous stone is 60%. is 10%, and the chlorine content in the pyrophyllite is 60%, which is then sent to the storage tank respectively, homogenized for 72 hours, and taken out;

[0044] Step 3. Put the raw materials homogenized in step 2 into the raw material bin for mixing, take out the mixed raw materials and send them to the storage tank again, and homogenize them for 76 hours. After testing, the...

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Abstract

The invention discloses a preparation process of white cement, comprising the following steps of: taking the components in percentage by weight: 70-75% of limestone with calcium content of 50-70%, 20-25% of siliceous stone with silicon content of 9-10% and 5% of pyrophylite with chlorinity of 50-70%; respectively crushing and grinding the limestone, the siliceous stone and the pyrophylite to formgrains of 250-300 meshes in size of 2-4cm; homogenizing for 68-78h, mixing and secondarily homogenizing for 72-80h; then firing at the temperature of 1500-1800 DEG C for 12-48h; bleaching raw materials by using a bleacher; enabling a formed mixture to enter into a deslagging water tank; depositing, filtering, drying and homogenizing for 72-80h to form a homogenized dried material; adding 6% of gypsum and 94% of the homogenized dried material; and grinding to 300-340 meshes to obtain a finished product. The process provided by the invention has the advantages of simplicity, easiness for mastering and reduction of production cost and labor consumption, and the white cement has good color and luster and high strength, reduces resource waste and saves production cost.

Description

technical field [0001] The invention relates to a preparation process of cement, in particular to a preparation process of white cement. Background technique [0002] White Portland cement, referred to as white cement, is a kind of cement, but its grade is higher than ordinary Portland cement, and it solidifies faster. Its main characteristics are that the amount of slag powder is 85-90%, and the amount of alkaline additives is No more than 5%. White cement is mostly used for decoration, mainly used for pointing joints between white porcelain pieces. Due to its weak strength, it cannot be used for wall painting. [0003] As an independent product of special cement, white cement not only requires high-quality raw material and fuel, but also requires stricter management and production technology. The two most important indicators of white cement are whiteness and strength. White cement, most of which have poor whiteness, poor color and low strength and quality, has poor effe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/36C04B7/06
Inventor 李建国陈延昌蔡军杰李云现
Owner HENAN WANXING SPECIAL CEMENT
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