Diatomite-based ceramsite and preparation method thereof

A technology of diatomite and ceramsite, which is applied in the field of ceramic materials, can solve the problems of losing the porous characteristics of diatomite and the melting and collapse of microporous structure, so as to save energy, reduce the sintering temperature and prevent collapse

Active Publication Date: 2017-04-26
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the production process of ceramsite in published papers or patents, most of the high-temperature sintering above 1000°C is used. Diatomite at high temperature will cause the microporous structure to melt and collapse, thus losing the porous characteristics of diatomite.

Method used

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  • Diatomite-based ceramsite and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] a. Prepare materials, pretreat low-grade diatomite, dolomite and waste glass, then pass low-grade diatomite and dolomite through a 100-mesh sieve respectively, and glass powder through a 140-mesh sieve, take the above-mentioned materials and sieve the blanks, and then The following components are weighed by mass percentage: 50% of low-grade diatomite, 20% of dolomite, 10% of glass powder, and 20% of borax.

[0034] b. Comprehensive ball milling, put the raw materials into the planetary ball mill for ball milling, and adopt the combination process of wet milling-drying-dry milling, specifically: use high-alumina ball milling tanks and zirconia balls for ball milling; during wet milling, put the solid raw materials in In the ball mill tank, add water 10 times the total mass of solid raw materials, and wet grind it on a planetary ball mill at a speed of 250r / min for 30 minutes; after wet grinding, pour the mixture into a tray and dry it in an oven at 100°C 12h; after dryin...

Embodiment 2

[0040] a. Prepare materials, pretreat low-grade diatomite, dolomite and waste glass, then pass low-grade diatomite and dolomite through a 100-mesh sieve respectively, and glass powder through a 140-mesh sieve, take the above-mentioned materials and sieve the blanks, and then The following components are weighed by mass percentage: 55% of diatomite, 20% of dolomite, 10% of glass powder, and 15% of borax.

[0041] b. Comprehensive ball milling, put the raw materials into the planetary ball mill for ball milling, and adopt the combination process of wet milling-drying-dry milling, specifically: use high-alumina ball milling tanks and zirconia balls for ball milling; during wet milling, put the solid raw materials in In the ball mill tank, add water 10 times the total mass of solid raw materials, and wet grind it on a planetary ball mill at a speed of 250r / min for 30 minutes; after wet grinding, pour the mixture into a tray and dry it in an oven at 100°C 12h; after drying, put the...

Embodiment 3

[0047] a. Prepare materials, pretreat low-grade diatomite, dolomite and waste glass, then pass low-grade diatomite and dolomite through a 100-mesh sieve respectively, and glass powder through a 140-mesh sieve, take the above-mentioned materials and sieve the blanks, and then The following components are weighed by mass percentage: 60% of diatomite, 20% of dolomite, 10% of glass powder, and 10% of borax.

[0048] b. Comprehensive ball milling, put the raw materials into the planetary ball mill for ball milling, and adopt the combination process of wet milling-drying-dry milling, specifically: use high-alumina ball milling tanks and zirconia balls for ball milling; during wet milling, put the solid raw materials in In the ball mill tank, add water 10 times the total mass of solid raw materials, and wet grind it on a planetary ball mill at a speed of 250r / min for 30 minutes; after wet grinding, pour the mixture into a tray and dry it in an oven at 100°C 12h; after drying, put the...

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Abstract

The invention relates to a diatomite-based ceramsite and a preparation method thereof, and belongs to the field of ceramic materials. Raw materials used in the preparation method of the diatomite-based ceramsite comprise a solid raw material and an additive, wherein the solid raw material comprises, by mass, 50-60% of low grade diatomite, 15-20% of dolomite, 5-10% of glass powder and 10-20% of borax, the additive is a sodium silicate solution with the concentration of 13% or 26%, and the use amount of the sodium silicate is 8% of the total weight of the solid raw material. Compared with the prior art, the method disclosed in the invention has the advantages of sintering temperature reduction and small particle size. The method reduces the sintering temperature under the increasing short circumference of energy, so energy is saved, the produced ceramsite is environmentally-friendly, and the application range of the ceramsite is enlarged.

Description

technical field [0001] The invention relates to a diatomite-based ceramsite and a preparation method thereof, belonging to the field of ceramic materials. Background technique [0002] Ceramsite was developed by Hyade in 1918. As a new type of filter material, ceramsite has the characteristics of small bulk density, large surface area, high porosity, good mechanical strength, and strong adsorption capacity. During the sintering process, the raw materials undergo a chemical reaction to release gas, produce pores or expand, and form a light porous, spherical or quasi-spherical silicate product with a certain strength after cooling. Diatomaceous earth is a biogenic siliceous sedimentary rock whose main chemical composition is SiO 2 , the mineral components are mainly opal and its variants and some clay components. Diatomite combined with clay, waste glass and some additives are sintered at different temperatures to produce ceramsite products with different properties. Accord...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/14C04B38/10C04B38/02C04B35/64
CPCC04B35/14C04B35/64C04B38/009C04B2235/3208C04B2235/3409C04B2235/3427C04B2235/36C04B2235/77C04B2235/96C04B38/0074C04B38/10C04B38/02
Inventor 高文元满建宗牛梅红刘贵山郝洪顺阎爽孙晓程
Owner DALIAN POLYTECHNIC UNIVERSITY
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