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Method for preparing ceramic tiles from calcium silicate slag

A technology of silicon-calcium slag and ceramic bricks, which is applied in the field of comprehensive utilization of solid waste resources, can solve the problems of difficult standardization of sintering temperature system, difficult control of product quality and performance, and increased difficulty and efficiency of iron removal, so as to save raw materials The effect of iron removal, reduction of crushing and ball milling time, reduction of energy consumption and cost

Inactive Publication Date: 2014-03-19
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the mixed raw material processing method, this technical method has the problems of poor raw material mixing processing effect, high energy consumption, and low product performance, and the iron in the raw material can easily affect the performance of the product
Patent Publication No. CN101386528A provides a method for producing ceramic tiles using steel slag. The process for producing ceramics is feasible, but the process uses traditional massive steel slag as raw material and requires pretreatment of steel slag, such as grinding and iron removal, and steel slag is easy to Poor abrasiveness and complex forms of iron, which greatly increase the energy consumption and cost of raw material pretreatment in ceramic factories, and also increase the difficulty and efficiency of iron removal in the production process, so it has not been popularized and applied
In short, in the process of using industrial waste to prepare ceramics, there are generally unfavorable factors such as high iron content, high energy consumption for grinding, difficulty in controlling product quality and performance, and difficulty in standardizing the sintering temperature system. limit its development

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0031] According to the recipe requirements, the weight percentage of each raw material is: 60% calcium silicate slag, 15% clay, 10% pyrophyllite, 15% quartz, add 0.3% sodium tripolyphosphate, 0.1% carboxymethyl Sodium cellulose. After mixing the materials, mix them with water in a certain ratio and put them into a ball mill for ball milling to make a slurry that passes through a 250-mesh sieve and then dry it. Add water to the dried slurry and granulate it to press it into a green body. After drying, the water content of the green body is less than 0.1 %, into the roller kiln firing temperature at 1160 ℃. After firing, the weight loss rate of the sample is about 18%, the flexural strength is 43MPa, and the water absorption rate is <0.9%. It is a kind of building ceramic material with good performance.

example 2

[0033] According to the recipe requirements, the weight percentage of each raw material is: 50% of calcium silicate slag, 20% of clay, 10% of pyrophyllite, 20% of quartz, and 0.3% of sodium tripolyphosphate and 0.1% of carboxymethyl Sodium cellulose. After mixing the materials, mix them with water in a certain ratio and put them into a ball mill for ball milling to make a slurry that passes through a 250-mesh sieve and then dry it. Add water to the dried slurry and granulate it to press it into a green body. After drying, the water content of the green body is less than 0.1 %, into the roller kiln firing temperature at 1160 ℃. After firing, the weight loss rate of the sample is about 16%, the flexural strength is 63MPa, and the water absorption rate is less than 0.3%. It is a kind of building ceramic material with good performance.

example 3

[0035] According to the recipe requirements, the weight percentage of each raw material is: 50% of silicon-calcium slag, 15% of clay, 6% of feldspar, 5% of pyrophyllite, 20% of quartz, and 5% of talc. Sodium polyphosphate, 0.1% sodium carboxymethylcellulose. After mixing the materials, mix them with water in a certain ratio and put them into a ball mill for ball milling to make a slurry that passes through a 250-mesh sieve and then dry it. Add water to the dried slurry and granulate it to press it into a green body. After drying, the water content of the green body is less than 0.1 %, into the roller kiln firing temperature at 1155 ℃. After firing, the weight loss rate of the sample is about 16%, the flexural strength is 72MPa, and the water absorption rate is less than 0.1%. It is a kind of building ceramic material with good performance.

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Abstract

The invention relates to a method for preparing ceramic tiles from calcium silicate slag, belonging to the field of comprehensive utilization of resources and novel technologies for ceramic preparation. The ceramic tiles contain the following raw materials in percentage by weight: 30-60% of calcium silicate slag, 10-30% of clay, 2-25% of quartz, 0-20% of feldspar, 0-10% of pyrophyllite, 0-10% of green coke and 0-10% of talc. According to the method, ceramics are produced from calcium silicate slag, so that the stacked discharge of calcium silicate slag is reduced, the aim of resource recycling is achieved, and a new way for the high-added-value utilization of calcium silicate slag is added; the utilization ratio of calcium silicate slag in calcium silicate slag ceramics can reach 60%; by using the characteristic that a great deal of alkali metal ions are contained, a feldspar raw material can be replaced partially or totally, and the ceramic tiles are produced under the low-temperature condition of 1,130-1,180 DEG C; all properties of the ceramic tiles prepared by the method disclosed by the invention are better than the national ceramic standards.

Description

Technical field [0001] The present invention involves the process method of the production of ceramics in silicon calcium residue, which is a comprehensive field of use of solid waste resources. technical background [0002] Silicon calcium residue is the residue of alumina for aluminum aluminum. The main component is silica calcium.Gyllahy ash is the main solid waste discharged by power plants. The powder and coal ash in the Inner Mongolia area contains high aluminum content. The resource recovery and utilization of high value -added resource on the ash is a must for sustainable development.The comprehensive utilization of flour ash, especially the rare metals such as alumina alumina from the ash of the ash, will become a trend.However, due to the method of extracting the siliconic acid calcium -containing calcium -containing calcium -containing calcium -containing calcium calcium calcium in the lime ash sintering method in the aluminum sintering method in the lime ash sintering...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132
CPCY02P40/60
Inventor 李宇宗燕兵李少华苍大强
Owner UNIV OF SCI & TECH BEIJING
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