Raw material formula and method for preparing porous ceramics by using silicon micronized quartz powder of iron alloy plant

A technology of porous ceramics and iron alloys, which is applied in the field of raw material formulations for the preparation of porous ceramics, can solve the problems of porous ceramics that have not yet been discovered, and achieve the effects of environmental protection, high activity, and improvement of market competitiveness

Inactive Publication Date: 2008-03-05
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, microsilica dust is mostly used as an additive for various concretes, as a binder for refractory materials, etc., and no report has been found on the use of microsilica dust to prepare porous ceramics.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The porous ceramics are prepared by using silicon micro-dust and clay from a ferroalloy plant as raw materials, and the raw material formula is as follows: 95% of silicon micro-dust and 5% of clay.

[0020] Preparation steps:

[0021] a. Weigh the raw materials according to the above formula, mix well, add 100% water and stir into mud;

[0022] b. After filtering the slurry with a 200-mesh sieve, dehydrate the slurry to make mud with a moisture content of 20-24%;

[0023] c. The mud is molded by plastic method to make semi-finished bodies of different specifications;

[0024] d. Dry the semi-finished green body until the water content is ≤1%, put it in a kiln for sintering at 750°C, keep it at the firing temperature for 30 minutes, stop the fire, and cool it down to room temperature naturally to make porous ceramics.

[0025] The properties of the prepared porous ceramics: porosity 45.81%, bulk density 1.21g / cm 3 , flexural strength 11.51MPa, specific surface area: 3...

Embodiment 2

[0027] The porous ceramics are prepared by using silicon micro-dust and clay from a ferroalloy plant as raw materials, and the raw material formula is as follows: 98% of silicon micro-dust and 2% of clay.

[0028] Preparation steps:

[0029] a. Weigh the raw materials according to the above formula, mix well, add 80% water and stir into mud;

[0030] b. After filtering the slurry with a 200-mesh sieve, the slurry is dried and dehydrated to make a powder with a moisture content of 5-7%;

[0031] c. Form the powder into semi-finished bodies of different specifications;

[0032] d. Dry the semi-finished green body until the moisture content is ≤1%, put it in a kiln for sintering at 780°C, keep it at the firing temperature for 30 minutes, stop the fire, and cool it down to room temperature naturally to make porous ceramics.

[0033] The properties of the prepared porous ceramics: porosity 41.91%, bulk density 1.23g / cm 3 , strength 13.47MPa, specific surface area 34.22m 2 / g. ...

Embodiment 3

[0035] The porous ceramics are prepared by using silicon micro-dust and water glass from a ferroalloy factory as raw materials, and the raw material formula is as follows: 99.5% of silicon micro-dust and 0.5% of water glass.

[0036] Preparation steps:

[0037] a. Weigh the raw materials according to the above formula, mix well, add 80% water and stir into mud;

[0038] b. After filtering the slurry with a 200-mesh sieve, the slurry is dried and dehydrated to make a powder with a moisture content of 5-7%;

[0039] c. Form the powder into semi-finished bodies of different specifications;

[0040] d. Dry the semi-finished green body until the water content is ≤1%, put it in a kiln for sintering at 750°C, keep it at the firing temperature for 30 minutes, stop the fire, and cool it down to room temperature naturally to make porous ceramics.

[0041] The properties of the prepared porous ceramics: porosity 43.10%, bulk density 1.27g / cm 3 , strength 11.24MPa, specific surface are...

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Abstract

The present invention provides one kind of porous ceramic prepared with micro silica dust from ferroalloly works and its material recipe and preparation process. The material recipe includes micro silica dust and additive. The preparation process includes the steps of: mixing material and adding water to form slurry, dewatering the slurry to form powder, forming biscuit, stoving biscuit to water content lower than 1 %, sintering in a kiln for 30 min, and naturally cooling to room temperature to obtain the porous ceramic. The product has simple production process, low sintering temperature, great specific surface area, small and narrowly distributed pore size, excellent sound isolating, heat insulating, adsorbing and filtering performance.

Description

technical field [0001] The invention relates to the comprehensive utilization of solid waste in ecological environment materials, in particular to a raw material formula and a method for preparing porous ceramics by utilizing silicon micropowder dust from a ferroalloy factory. Background technique [0002] Porous ceramics, also known as microporous ceramics, foam ceramics, etc., are ceramic products with uniformly distributed micropores, low volume density, three-dimensional network skeleton structure, and interpenetration. It has a developed specific surface area and unique physical surface characteristics, and has selective permeability, energy absorption or pressure resistance characteristics for liquid and gas media, and the unique high temperature resistance and corrosion resistance of ceramic materials. Porous ceramics are widely used in many aspects such as gas and liquid filtration, purification and separation, chemical catalyst carrier, advanced thermal insulation m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/14C04B38/00
Inventor 于岩吴任平阮玉忠朱立钦林剑英
Owner FUZHOU UNIV
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