CN104973870A - Calcium-containing refractory material and preparation method thereof - Google Patents

Abstract

The present invention discloses a calcium-containing refractory material, which is composed of the following raw materials by weight: 1-2 parts of allyl polyethylene glycol, 0.4-1 part of zinc oxide, 1-2 parts of glucose, 2-4 parts of tricalcium silicate, 1-2 parts of anhydrous calcium chloride, 0.4-1 part of sodium fluoride, 60-70 parts of alumina, 4-10 parts of phenolic resins, 10-12 parts of sisal fibers, 26-30 parts of tetraethoxysilane, 3-4 parts of 5-7mol / l nitric acid solution and 2-3 parts of glacial acetic acid. The method is as below: hydrolyzing tetraethoxysilane in the presence of a catalyst of glacial acetic acid into silane alcosol; mixing silane alcosol with fiber emulsion; evaporating the solvent to obtain a carbon and silicon heterocomplex; and finally conducting high temperature carbonization by using the fiber emulsion as the carbon source to obtain a carbon silicon composite additive. The carbon silicon composite additive has the advantages of chemical stability, high thermal conductivity, small thermal expansion coefficient, high thermal shock resistance, light weight, and high strength.

Description

A kind of containing lime refractory and preparation method thereof

Technical field

The present invention relates to a kind of refractory materials, particularly relate to a kind of containing lime 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, Al2O3, ZrO2 and MgAl2O4, carbon is natural graphite mainly, non-oxidized substance is mainly the metals such as Al, Si, Mg, the alloy of AlSi, AlMg class and SiC, B4C mono-compound of 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 containing lime refractory and preparation method thereof.

The present invention is achieved by the following technical solutions:

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

The salpeter solution 3-4 of allyl polyglycol 1-2, zinc oxide 0.4-1, glucose 1-2, tricalcium silicate 2-4, Calcium Chloride Powder Anhydrous 1-2, Sodium Fluoride 0.4-1, aluminum oxide 60-70, resol 4-10, sisal fibers 10-12, tetraethoxy 26-30,5-7mol/l, Glacial acetic acid 2-3.

Containing a preparation method for lime refractory, comprise the following steps:

(1) sisal fibers being joined concentration is infiltrate 3-4 hour in the bisulfite potassium solution of 5-7%, takes out post-drying, adds salpeter solution, be uniformly mixed 20-30 minute, add edible alkali, regulate PH to be neutral, add glucose, stir, obtain glucose fiber liquid;

(2) by tricalcium silicate, Calcium Chloride Powder Anhydrous mixing abrasive dust, silicon calcium powder is obtained;

(3) joined by above-mentioned tetraethoxy in 8-10 dehydrated alcohol doubly, stirring and dissolving, is added drop-wise in above-mentioned glucose fiber liquid by lysate, after dropwising, add Glacial acetic acid, at 40-45 DEG C, react 10-12 hour, with dehydrated alcohol and distilled water, product is washed successively, filter, mix with above-mentioned silicon calcium powder, vacuum calcining: vacuum tightness is 8-10Pa, temperature rise rate is 80-100 DEG C/min, be incubated roasting 10-12 h after being warmed up to 1260-1300 DEG C, obtain carbon silicon composite assistant;

(4) joined by Sodium Fluoride in 3-4 times of water, add allyl polyglycol, resol after stirring, insulated and stirred 3-5 minute at 75-80 DEG C, obtains resin glue;

(5) zinc oxide is mixed with aluminum oxide, be dry mixed and roll over 2-3 minute, add 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, silanol colloidal sol is mixed with fibre emulsion, pass through evaporating solvent, obtain carbon containing, the heterocomplex of silicon, eventually pass high temperature cabonization, fibre emulsion provides carbon source, obtain carbon silicon composite assistant, the stable chemical performance of this carbon silicon composite assistant, thermal conductivity is high, thermal expansivity is little, resistance to thermal shock, lightweight, intensity is high, the glucose wherein added can improve the binding property between each raw material, and can as carbon source, the silicon calcium powder added can improve surface strength and the fire performance of finished product.

Embodiment

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

Embodiment 1:

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

The salpeter solution 3 of allyl polyglycol 1, zinc oxide 0.4, glucose 2, tricalcium silicate 4, Calcium Chloride Powder Anhydrous 2, Sodium Fluoride 0.4, aluminum oxide 60, resol 10, sisal fibers 12, tetraethoxy 30,5-7mol/l, Glacial acetic acid 3.

Containing a preparation method for lime refractory, comprise the following steps:

(1) sisal fibers being joined concentration is infiltrate 3 hours in the bisulfite potassium solution of 7%, takes out post-drying, adds salpeter solution, be uniformly mixed 30 minutes, add edible alkali, regulates PH to be neutral, adds glucose, stir, obtain glucose fiber liquid;

(2) by tricalcium silicate, Calcium Chloride Powder Anhydrous mixing abrasive dust, silicon calcium powder is obtained;

(3) above-mentioned tetraethoxy is joined in the dehydrated alcohol of 10 times, stirring and dissolving, lysate is added drop-wise in above-mentioned glucose fiber liquid, after dropwising, add Glacial acetic acid, react 12 hours at 45 DEG C, with dehydrated alcohol and distilled water, product is washed successively, filter, mix with above-mentioned silicon calcium powder, vacuum calcining: vacuum tightness is 10Pa, temperature rise rate is 100 DEG C/min, be incubated roasting 10-12 h after being warmed up to 1300 DEG C, obtain carbon silicon composite assistant;

(4) joined by Sodium Fluoride in 4 times of water, add allyl polyglycol, resol after stirring, at 80 DEG C, insulated and stirred 5 minutes, obtains resin glue;

(5) mixed with aluminum oxide by zinc oxide, be dry mixed rolling 2 minutes, add resin glue, mixed rolling 10 minutes, add each raw material of residue, 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 4.0mm; 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 9 times; High temperature break resistant intensity is 7.8MPa.

Claims (2)

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

The salpeter solution 3-4 of allyl polyglycol 1-2, zinc oxide 0.4-1, glucose 1-2, tricalcium silicate 2-4, Calcium Chloride Powder Anhydrous 1-2, Sodium Fluoride 0.4-1, aluminum oxide 60-70, resol 4-10, sisal fibers 10-12, tetraethoxy 26-30,5-7mol/l, Glacial acetic acid 2-3.

2. the preparation method containing lime refractory as claimed in claim 1, is characterized in that comprising the following steps:

(1) sisal fibers being joined concentration is infiltrate 3-4 hour in the bisulfite potassium solution of 5-7%, takes out post-drying, adds salpeter solution, be uniformly mixed 20-30 minute, add edible alkali, regulate PH to be neutral, add glucose, stir, obtain glucose fiber liquid;

(2) by tricalcium silicate, Calcium Chloride Powder Anhydrous mixing abrasive dust, silicon calcium powder is obtained;

(3) joined by above-mentioned tetraethoxy in 8-10 dehydrated alcohol doubly, stirring and dissolving, is added drop-wise in above-mentioned glucose fiber liquid by lysate, after dropwising, add Glacial acetic acid, at 40-45 DEG C, react 10-12 hour, with dehydrated alcohol and distilled water, product is washed successively, filter, mix with above-mentioned silicon calcium powder, vacuum calcining: vacuum tightness is 8-10Pa, temperature rise rate is 80-100 DEG C/min, be incubated roasting 10-12 h after being warmed up to 1260-1300 DEG C, obtain carbon silicon composite assistant;

(4) joined by Sodium Fluoride in 3-4 times of water, add allyl polyglycol, resol after stirring, insulated and stirred 3-5 minute at 75-80 DEG C, obtains resin glue;

(5) zinc oxide is mixed with aluminum oxide, be dry mixed and roll over 2-3 minute, add 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.