CN105036760A - Heat-insulating refractory material and preparation method thereof - Google Patents

Abstract

The invention discloses a heat-insulating refractory material which is prepared from the following raw materials in parts by weight: 0.1-0.3 part of potassium hydrogen sulfate, 4-7 parts of sodium silicate, 5-10 parts of magnesium silicate, 3-4 parts of glass fiber, 16-20 parts of aluminum oxide, 30-40 parts of silica white,, 30-37 parts of aluminum silicate, 4-7 parts of terpene resin, 6-10 parts of pulverized asbestos, 10-16 parts of flax fiber, 2-3 parts of glacial acetic acid, 0.7-1 part of chitosan, 26-30 parts of ethyl orthosilicate, 80-102 parts of 6-10% ammonia water, 100-110 parts of 3-5% oxydol and 0.1-0.18 part of 10-15 mol/L sulfuric acid. The method comprises the following steps: hydrolyzing the ethyl orthosilicate into a silanol sol by using the glacial acetic acid as a catalyst, mixing the silanol sol and a silicon fiber activation solution, evaporating the solvent to obtain a carbon-silicon-containing heterocomplex, and carrying out high-temperature carbonization by providing a carbon source with the fiber activation solution to obtain the carbon-silicon composite assistant. The carbon-silicon-calcium composite assistant has the advantages of stable chemical properties, high heat conductivity coefficient, small thermal expansion coefficient, heat shock resistance, light weight and high strength.

Description

A kind of insulating refractory and preparation method thereof

Technical field

The present invention relates to a kind of refractory materials, particularly relate to a kind of insulating refractory and preparation method thereof.

Background technology

Refractory materials refers to that refractoriness is not less than a class ceramic of 1580 DEG C.Refractoriness refers to that refractory materials cone-shaped body sample is not having in loading situation, resists high temperature action and does not soften molten centigradetemperature.But only define with refractoriness and can not describe refractory materials, 1580 DEG C is not absolute comprehensively.Now be defined as the material that all physicochemical property allow it to use in high temperature environments and be called refractory materials.Refractory materials is widely used in the industrial circles such as metallurgy, chemical industry, oil, machinofacture, silicate, power, and in metallurgical industry, consumption is maximum, accounts for the 50%-60% of ultimate production.

Carbon composite refractory is raw material by two kinds or two or more refractory oxide of different nature and carbon materials and non-oxidic material, the heterogeneous composite refractory of one that carbonaceous organic material is made as bonding agent.The oxide compound adopted mainly contains MgO, Al ₂o ₃, ZrO ₂and MgAl ₂o ₄, carbon is natural graphite mainly, and non-oxidized substance is mainly the metals such as Al, Si, Mg, the alloy of AlSi, AlMg class and SiC, B ₄the compound of C mono-class, then in addition shaping by adding the bonding agent such as resin or pitch, the composite refractory be made up of oxide compound, carbon, non-oxygen compound and bonding agent can be obtained.

Summary of the invention

The object of the invention is just to provide a kind of insulating refractory and preparation method thereof.

The present invention is achieved by the following technical solutions:

A kind of insulating refractory, it is made up of the raw material of following weight parts:

The sulfuric acid 0.1-0.18 of hydrogen peroxide 100-110,10-15mol/l of ammoniacal liquor 80-102,3-5% of sal enixum 0.1-0.3, water glass 4-7, Magnesium Silicate q-agent 5-10, glass fibre 3-4, aluminum oxide 16-20, white carbon black 30-40, pure aluminium silicate 30-37, terpine resin 4-7, asbestos powder 6-10, flax fiber 10-16, Glacial acetic acid 2-3, chitosan 0.7-1, tetraethoxy 26-30,6-10%.

A preparation method for insulating refractory, comprises the following steps:

(1) mixed by the hydrogen peroxide of the ammoniacal liquor of 6-10%, 3-5%, stirring, is activation solution;

(2) by water glass, chitosan mixing, join in 4-6 times of water, stir, obtain sodium silicate solution;

(3) joined by flax fiber in above-mentioned activation solution, insulated and stirred 3-5 minute at 60-70 DEG C, adds sodium silicate solution, ultrasonic 2-3 minute, regulates PH to be neutral, obtains silica fibre activation solution;

(4) sulfuric acid of above-mentioned 10-15mol/l is mixed with Glacial acetic acid, obtain acid solution;

(5) tetraethoxy is joined in 8-10 dehydrated alcohol doubly, stirring and dissolving, lysate is added drop-wise in silica fibre activation solution, after dropwising, add above-mentioned acid solution, Heat preservation 3-5 minute at 70-80 DEG C, reduction temperature is 40-45 DEG C, insulation reaction 10-12 hour, washs product with dehydrated alcohol and distilled water successively, filters, vacuum calcining: vacuum tightness is 8-10Pa, temperature rise rate is 80-100 DEG C/min, is incubated roasting 10-12h after being warmed up to 1200-1300 DEG C, obtains carbon silicon composite assistant;

(6) get the 6-10% of above-mentioned asbestos powder weight, join in 2-3 times of water, add sal enixum, after stirring, add terpine resin, be incubated 2-3 minute at 70-80 DEG C, obtain resin glue;

(7) by Magnesium Silicate q-agent, glass fibre, aluminum oxide mixing, mixed rolling 20-30 minute, adds resin glue, mixed rolling 6-10 minute, add each raw material of residue, adjustment temperature is 80-90 DEG C, mixed rolling 16-20 minute, hot-forming, burn till under 1200-1400 DEG C of condition under buried charcoal atmosphere.

Compared with prior art, advantage of the present invention is:

Tetraethoxy of the present invention is silanol colloidal sol in the Water Under solution that catalyzer Glacial acetic acid adds, by silanol colloidal sol, the mixing of silica fibre activation solution, pass through evaporating solvent, obtain the heterocomplex of carbon containing, silicon, eventually pass high temperature cabonization, fiber activation liquid provides carbon source, obtains carbon silicon composite assistant, and the stable chemical performance of this carbon silico-calcium composite assistant, thermal conductivity is high, thermal expansivity is little, resistance to thermal shock, lightweight, intensity is high;

Add water glass, Magnesium Silicate q-agent, asbestos powder, glass fibre, pure aluminium silicate etc. in refractory materials of the present invention, there is obvious thermal insulation.

Embodiment

Below in conjunction with embodiment, the present invention is described in further detail:

Embodiment:

A kind of insulating refractory, it is made up of the raw material of following weight parts:

The hydrogen peroxide 110 of ammoniacal liquor 102,5% of sal enixum 0.3, water glass 7, Magnesium Silicate q-agent 10, glass fibre 4, aluminum oxide 20, white carbon black 40, pure aluminium silicate 37, terpine resin 7, asbestos powder 10, flax fiber 16, Glacial acetic acid 2, chitosan 0.7, tetraethoxy 30,10%, the sulfuric acid 0.18 of 15mol/l.

A preparation method for insulating refractory, comprises the following steps:

(1) by the ammoniacal liquor of 10%, 5% hydrogen peroxide mixing, stirring, is activation solution;

(2) by water glass, chitosan mixing, join in 6 times of water, stir, obtain sodium silicate solution;

(3) joined by flax fiber in above-mentioned activation solution, at 70 DEG C, insulated and stirred 5 minutes, adds sodium silicate solution, ultrasonic 3 minutes, regulates PH to be neutral, obtains silica fibre activation solution;

(4) sulfuric acid of above-mentioned 15mol/l is mixed with Glacial acetic acid, obtain acid solution;

(5) joined by tetraethoxy in 8-10 dehydrated alcohol doubly, stirring and dissolving, is added drop-wise in silica fibre activation solution by lysate, after dropwising, add above-mentioned acid solution, Heat preservation 5 minutes at 80 DEG C, reducing temperature is 45 DEG C, insulation reaction 12 hours, washs product with dehydrated alcohol and distilled water successively, filters, vacuum calcining: vacuum tightness is 10Pa, temperature rise rate is 100 DEG C/min, is incubated roasting 12h after being warmed up to 1300 DEG C, obtains carbon silicon composite assistant;

(6) get 10% of above-mentioned asbestos powder weight, join in 3 times of water, add sal enixum, after stirring, add terpine resin, be incubated 2 minutes at 80 DEG C, obtain resin glue;

(7) by Magnesium Silicate q-agent, glass fibre, aluminum oxide mixing, mixed rolling 30 minutes, adds resin glue, and mixed rolling 10 minutes adds each raw material of residue, and adjustment temperature is 90 DEG C, and mixed rolling 20 minutes is hot-forming, burns till under buried charcoal atmosphere under 1400 DEG C of conditions.

Performance test:

Refractory materials of the present invention is pressed GB/T13244 and detect oxidation-resistance (1000 DEG C × 3h), practical decarburized depth is 4.6mm; Detecting the heat-shock resistance of 1100 DEG C of water-cooleds by YB/T376.1, there is not crackle in the test that sample can stand 8 times; High temperature break resistant intensity is 7.9MPa.

Claims (2)

1. an insulating refractory, is characterized in that what it was made up of the raw material of following weight parts:

The sulfuric acid 0.1-0.18 of hydrogen peroxide 100-110,10-15mol/l of ammoniacal liquor 80-102,3-5% of sal enixum 0.1-0.3, water glass 4-7, Magnesium Silicate q-agent 5-10, glass fibre 3-4, aluminum oxide 16-20, white carbon black 30-40, pure aluminium silicate 30-37, terpine resin 4-7, asbestos powder 6-10, flax fiber 10-16, Glacial acetic acid 2-3, chitosan 0.7-1, tetraethoxy 26-30,6-10%.

2. a preparation method for insulating refractory as claimed in claim 1, is characterized in that comprising the following steps:

(1) mixed by the hydrogen peroxide of the ammoniacal liquor of 6-10%, 3-5%, stirring, is activation solution;

(2) by water glass, chitosan mixing, join in 4-6 times of water, stir, obtain sodium silicate solution;

(3) joined by flax fiber in above-mentioned activation solution, insulated and stirred 3-5 minute at 60-70 DEG C, adds sodium silicate solution, ultrasonic 2-3 minute, regulates PH to be neutral, obtains silica fibre activation solution;

(4) sulfuric acid of above-mentioned 10-15mol/l is mixed with Glacial acetic acid, obtain acid solution;

(5) tetraethoxy is joined in 8-10 dehydrated alcohol doubly, stirring and dissolving, lysate is added drop-wise in silica fibre activation solution, after dropwising, add above-mentioned acid solution, Heat preservation 3-5 minute at 70-80 DEG C, reduction temperature is 40-45 DEG C, insulation reaction 10-12 hour, washs product with dehydrated alcohol and distilled water successively, filters, vacuum calcining: vacuum tightness is 8-10Pa, temperature rise rate is 80-100 DEG C/min, is incubated roasting 10-12h after being warmed up to 1200-1300 DEG C, obtains carbon silicon composite assistant;

(6) get the 6-10% of above-mentioned asbestos powder weight, join in 2-3 times of water, add sal enixum, after stirring, add terpine resin, be incubated 2-3 minute at 70-80 DEG C, obtain resin glue;

(7) by Magnesium Silicate q-agent, glass fibre, aluminum oxide mixing, mixed rolling 20-30 minute, adds resin glue, mixed rolling 6-10 minute, add each raw material of residue, adjustment temperature is 80-90 DEG C, mixed rolling 16-20 minute, hot-forming, burn till under 1200-1400 DEG C of condition under buried charcoal atmosphere.