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A kind of forsterite light heat insulation refractory material and preparation method thereof

A refractory material, lightweight heat insulation technology, applied in the direction of ceramic products, other household appliances, household appliances, etc., can solve the problems of high requirements and high product prices, and achieve high porosity, low re-burning line shrinkage, and pore size. Evenly distributed effect

Active Publication Date: 2020-06-09
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at present, forsterite refractory materials have high requirements for raw materials, and the product price is expensive

Method used

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  • A kind of forsterite light heat insulation refractory material and preparation method thereof
  • A kind of forsterite light heat insulation refractory material and preparation method thereof
  • A kind of forsterite light heat insulation refractory material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Raw materials: nickel slag, silicon-manganese slag, fly ash, the mass ratio of the three is 15:45:40, plus 15% rice husk; among them, 15% rice husk refers to rice husk and main material (nickel slag + waste magnesium brick + fly ash) is 15% by mass.

[0027] Preparation:

[0028] (1) Raw material pretreatment: nickel slag and silico-manganese slag are crushed and ground for 0.5-4 hours to obtain nickel slag and silico-manganese slag powder; rice husk is boiled with 10% HCl solution for 1-2 hours, and then washed with water clean, and finally crushed and ground for 1h to 3h to obtain rice husk powder;

[0029] (2) Ball mill mixing: nickel slag powder, silicomanganese slag powder, and fly ash powder are weighed in a mass ratio of 15:45:40, plus 15% rice husk powder, and ball milled for 2 hours;

[0030] (3) Molding: compression molding to obtain green body;

[0031] (4) Firing: 20°C to 500°C, heat up for 96 minutes, hold at 500°C for 30 minutes, 500°C to 1000°C, heat u...

Embodiment 2

[0035] Raw materials: nickel slag, chromium slag, waste magnesia bricks, sludge, the mass ratio of the four is 15:15:48:22, plus 5% straw, 5% carbon powder: among them, 5% straw refers to straw and main material ( The mass ratio of nickel slag + chromium slag + waste magnesia brick + sludge) is 5%, and 5% carbon powder means that the mass ratio of carbon powder to main material (nickel slag + chromium slag + waste magnesia brick + sludge) is 5%. %.

[0036] Preparation:

[0037] (1) Raw material pretreatment: Nickel slag, chromium slag, waste magnesia bricks, and sludge are crushed and ground for 0.5-4 hours to obtain nickel slag, chromium slag, waste magnesia brick, and sludge powder; the volume fraction of straw is 10% HCl solution is boiled for 1-2 hours, then washed with water, finally crushed and ground for 1-3 hours to obtain straw powder;

[0038] (2) Ball mill mixing: nickel slag powder, chromium slag powder, waste magnesia brick powder, and sludge powder in a mass r...

Embodiment 3

[0044]Raw materials: chromium slag, waste magnesia bricks, coal gangue, the mass ratio of the three is 26:43:31, plus 10% charcoal, 2.5% boric acid; 10% charcoal refers to charcoal and main materials (chrome slag + waste magnesia bricks +coal gangue) is 10%, and 2.5% boric acid means that the mass ratio of boric acid to main material (chrome slag+waste magnesia brick+coal gangue) is 2.5%.

[0045] Preparation:

[0046] (1) Raw material pretreatment: chrome slag, waste magnesia brick, coal gangue are crushed and ground for 0.5-4 hours to obtain nickel slag, waste magnesia brick, and coal gangue powder; charcoal is boiled with a volume fraction of 10% HCl solution for 1-2 hours 2h, then washed with water, finally crushed and ground for 1h-3h to obtain charcoal powder;

[0047] (2) Ball mill mixing: take nickel slag powder, waste magnesia brick powder, and coal gangue powder in a mass ratio of 26:43:31, add 10% charcoal powder, 2.5% boric acid, weigh, and ball mill for 2 hours; ...

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Abstract

The invention discloses a forsterite-containing light-weight heat-insulating refractory material and a preparation method thereof. The refractory material comprises the following components in percentby weight: 28-39% of SiO2, 40-58% of MgO, 10-18% of Al2O3, 2% or smaller than 2% of Fe2O3, 2% or smaller than 2% of CaO and 3% or smaller than 3% of K, Na and other impurities; the refractory material is prepared by using a mixture of magnesium-enriched waste residue and an aluminum-containing waste material as a main material and using biomass powder and a foaming agent as auxiliary materials, wherein in percent by weight, the main material comprises 60-78% of magnesium-enriched waste residue and 22-40% of aluminum-containing waste material. The preparation method of the refractory materialcomprises the following steps: crushing raw materials respectively, performing ball milling on the raw materials respectively to form powder, then weighing the powdery raw materials according to a formula, mixing, performing ball milling to obtain mixed powder, uniformly mixing the powder, moulding, putting into a sagger, and firing in air at high temperature to obtain the refractory material. Theprepared refractory material is high in porosity, small in heat conductivity coefficient, high in refractoriness, good in heat shock resistance and small in re-firing linear shrinkage rate.

Description

technical field [0001] The invention relates to a refractory material and a preparation method thereof, in particular to a forsterite light-weight heat-insulating refractory material using magnesium-rich waste slag as a raw material and a preparation method thereof. Background technique [0002] Heat-insulating refractory materials refer to materials with high porosity, low bulk density, heat-insulating properties, and heat-shielding properties. Because of the light weight of heat insulating refractory materials, they are usually called lightweight refractory materials. Lightweight heat-insulating refractory materials, in addition to being mainly used to prevent heat outflow loss under the condition of higher than ambient temperature, can also be used to prevent heat inflow under the condition of lower than ambient temperature. Under normal circumstances, the heat storage loss of industrial kiln masonry and heat loss on the surface of the furnace body account for about 24-4...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/06C04B38/02C04B35/20C04B35/622C04B35/66
CPCC04B35/20C04B35/62204C04B35/66C04B38/02C04B38/0675C04B38/068C04B2235/3201C04B2235/3208C04B2235/3217C04B2235/3272C04B2235/96C04B2235/9607C04B2235/9615C04B38/0067C04B38/0074
Inventor 郭伟蒋金海付启新李琦
Owner YANCHENG INST OF TECH
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