CN105130472A - Low-cost high-aluminum fireproof brick - Google Patents
Low-cost high-aluminum fireproof brick Download PDFInfo
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- CN105130472A CN105130472A CN201510571737.3A CN201510571737A CN105130472A CN 105130472 A CN105130472 A CN 105130472A CN 201510571737 A CN201510571737 A CN 201510571737A CN 105130472 A CN105130472 A CN 105130472A
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- powder
- alumina
- brown corundum
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Abstract
The invention provides a low-cost high-aluminum fireproof brick, which is formed by powder materials and bonding agents, wherein the powder materials are prepared from 43 to 53 parts of fused brown corundum particles, 20 to 30 parts of fused brown corundum fine powder, 8 to 12 parts of aluminum oxide micro powder, 12 to 20 parts of high-aluminum fireproof clinker powder materials, 2 to 3 parts of guangxi white clay, and the bonding agents account for 5 to 8 percent of the total weight of the powder materials and are a phosphoric acid solution with the concentration being 85 percent; the high-aluminum fireproof clinker powder materials are crushed and sintered low-cost high-aluminum fireproof bricks; the granularity of particles is between 3-1mm and 1-0mm; the weight ratio of the particles with the granularity being 3-1mm to the particles with the granularity being 1-0mm is 1 to (1.5 to 3).
Description
Technical field
The invention belongs to fire resisting material field, particularly relate to a kind of low cost alumina firebrick, can be used for high temperature kiln, there is superpower permeability resistance.
Background technology
At present; user is when selecting the inner lining refractory such as aluminium melting furnace, holding furnace, homogenizing furnace related in aluminium liquid treating processes; pay special attention to the traditional performance of refractory materials always; aluminium liquid perviousness is seldom noted, result in use, the situation that the very excellent refractory materials of traditional performance usually can be corroded by molten aluminium infiltration; not only cause refractory materials low for work-ing life; take time and effort, but also pollute aluminium liquid, reduce aluminium liquid quality.The common high alumina brick void content that existing aluminium melting furnace etc. generally uses is large, and intensity is not high, and easily and its reaction adhesion, anti-permeability performance is poor, very easily causes the infiltration of refractory materials to peel off for aluminium liquid.
Chinese patent 201410050088.8 describes a kind of superpower impermeabilisation high alumina brick, Al
2o
3han Liang≤88%, original material is made up of fused brown corundum, alumina powder, superfine Guangxi white clay, additional bonding agent, its material content is fused brown corundum particle: 50-63 part, fused brown corundum fine powder: 35-25 part, alumina powder: 10-15 part, superfine Guangxi white clay: 2-3 part, bonding agent account for fused brown corundum, alumina powder, superfine Guangxi white clay gross weight ratio be: 6-8 part, fused brown corundum particle in above-mentioned raw materials is mixed by described proportioning, stirs; First the particulate material of premix is pressed described weight, add bonding agent and stir, then add fused brown corundum fine powder by described weight ratio and continue mixing until evenly agglomerating; Mixing rear grog is required to weigh by weight and to pour in mold mechanical pressing under 630 tons of pressure into; Superpower impermeabilisation high alumina brick after shaping is put into tunnel furnace sinter, sintering temperature is 1400 DEG C, and the time is about 4 ~ 6 hours.
But swelling property is large when this refractory brick also exists sintering, and the problems such as qualification rate is lower, technically need to reduce costs further, improve qualification rate.And raw material also cannot be utilized, and have impact on economic benefit.
Summary of the invention
The present invention is directed to prior art deficiency, propose a kind of low cost alumina firebrick, on the principal feature basis of superpower impermeabilisation high alumina brick with prior art, by using high-alumina refractory grog, reducing cost, improve qualification rate.
The technical solution used in the present invention is: a kind of low cost alumina firebrick, Al
2o
3han Liang≤88%, be made up of powder and bonding agent, powder quality consists of: fused brown corundum particle: 43-53 part, fused brown corundum fine powder: 20-30 part, alumina powder: 8-12 part, high-alumina refractory grog powder 12-20 part, Guangxi white clay: 2-3 part, bonding agent accounts for the 5-8% of powder gross weight, wherein, bonding agent to be concentration be 85% phosphoric acid solution.
Concrete, described fused brown corundum particle is between 3-1mm, 1-0mm granularity, and 3-1mm granularity: the part by weight of 1-0mm granularity is 1:(1.5 ~ 3).
Concrete, described fused brown corundum fine powder is 200 object granularities.
Described alumina powder granularity is≤5 μm.
Described Guangxi White mud pellet degree is 200 orders.
Al in described fused brown corundum particle and fused brown corundum fine powder
2o
3>=94%; Fe
2o
3≤ 0.5%.
Described high-alumina refractory grog, refer to the sintered useless low cost alumina firebrick after fragmentation, particle is between 3-1mm, 1-0mm granularity, and 3-1mm granularity: the part by weight of 1-0mm granularity is 1:(1.5 ~ 3), high-alumina refractory grog add the volumetric expansion that effectively can reduce corundum transformation of crystal, reduce high alumina brick crackle, improve yield rate, save energy.
Described high-alumina refractory grog, also can be the minus mesh of the sintered following component high alumina brick after fragmentation, particle is between 3-1mm, 1-0mm granularity, and 3-1mm granularity: the part by weight of 1-0mm granularity is 1:(1.5 ~ 3): fused brown corundum particle: 50-63 part, fused brown corundum fine powder: 25-35 part, alumina powder: 10-15 part, Guangxi white clay: 2-3 part, bonding agent accounts for the 6-8% of powder gross weight, wherein, bonding agent to be concentration be 85% phosphoric acid solution.This high alumina brick is also the superpower impermeabilisation high alumina brick that Chinese patent 201410050088.8 is introduced.
The composition that this patent does not clearly state or composition, be quality composition or component.
The preparation technology of low cost alumina firebrick of the present invention is:
The first step, premix: fused brown corundum particle in above-mentioned raw materials and high-alumina refractory grog are mixed by described proportioning, stirs;
Second step, mixing: first by the particulate material of premix by described weight, add bonding agent and stir, then add fused brown corundum fine powder by described weight ratio, alumina powder, Guangxi white clay continue mixing until evenly agglomerating;
3rd step, shaping: mixing rear grog to be required to weigh by weight and to pour in mold mechanical pressing under 630 tons of pressure into;
4th, burn till: the superpower impermeabilisation high alumina brick after shaping is put into tunnel furnace and sinters, sintering temperature is 1380 ~ 1430 DEG C, and the time is 4 ~ 6 hours, namely obtains low cost alumina firebrick.
The invention has the beneficial effects as follows:
A kind of low cost alumina firebrick of the present invention, on the principal feature basis of superpower impermeabilisation high alumina brick with prior art, by using high-alumina refractory grog, reducing cost, improve qualification rate.
Low cost alumina firebrick physicochemical property of the present invention is as following table 1.
Table 1
embodiment:
Can be described in further detail the present invention with reference to following examples, but the present invention is not limited to these embodiments.
Embodiment 1:
A kind of low cost alumina firebrick, is characterized in that its raw material is by following weight:
(1), fused brown corundum particle: 51 parts, wherein the part by weight of grain diameter to be the fused brown corundum of 1-0mm and grain diameter the be fused brown corundum of 3-1mm is 1:2;
(2), fused brown corundum fine powder 200 order: 26 parts;
(3), high-alumina refractory grog powder: 16 parts;
(4), alumina powder≤5 micron: 8 parts;
(5), Guangxi white clay 200 order: 2 parts;
(6) bonding agent 85% strength solution 7 parts.
Premix: fused brown corundum particle, high-alumina refractory grog powder in above-mentioned raw materials are mixed by described proportioning, stirs;
Mixing: first the particulate material of premix to be pressed described weight, add special combination agent 85% strength solution and stir, then add fused brown corundum fine powder, alumina powder and Guangxi white clay by described weight ratio and continue mixing until evenly agglomerating;
Shaping: mixing rear grog to be weighed by every block low cost alumina firebrick fixed weight and pours in mold at 630 tons of forming under the pressure;
Burn till: the low cost alumina firebrick after shaping is put into tunnel furnace, 1380 DEG C are burnt till, 6 hours time.
Embodiment 2
A kind of low cost alumina firebrick, is characterized in that its raw material is by following weight:
(1), fused brown corundum particle: 53 parts; Wherein the part by weight of grain diameter to be the fused brown corundum of 1-0mm and grain diameter the be fused brown corundum of 3-1mm is 1:2.5;
(2), fused brown corundum fine powder 200 order: 20 parts;
(3), high-alumina refractory grog powder: 16 parts;
(4), alumina powder≤5 micron: 12 parts;
(5), Guangxi white clay 200 order: 3 parts;
Bonding agent 6 parts.
The manufacturing process of described low cost alumina firebrick is identical with embodiment 1, and sintering temperature 1420 DEG C of firing times are 5 hours.
Embodiment 3
A kind of low cost alumina firebrick, is characterized in that its raw material is by following weight:
(1), fused brown corundum particle: 43 parts, wherein the part by weight of grain diameter to be the fused brown corundum of 1-0mm and grain diameter the be fused brown corundum of 3-1mm is 1:3;
(2), fused brown corundum fine powder 200 order: 30 parts;
(3), high-alumina refractory grog powder: 20 parts;
(4), alumina powder≤5 micron: 10 parts;
(5), Guangxi white clay 200 order: 2.5 parts;
(6), bonding agent 8 parts.
The manufacturing process of described low cost alumina firebrick is identical with embodiment 1, but sintering temperature is 1430 DEG C of firing times is 4 hours.
Embodiment 4
A kind of low cost alumina firebrick, is characterized in that its raw material is by following weight:
(1), fused brown corundum particle: 45 parts, wherein the part by weight of grain diameter to be the fused brown corundum of 1-0mm and grain diameter the be fused brown corundum of 3-1mm is 1:1.8;
(2), fused brown corundum fine powder 200 order: 28 parts;
(3), high-alumina refractory grog powder: 14 parts;
(4), alumina powder≤5 micron: 8 parts;
(5), Guangxi white clay 200 order: 2 parts;
(6), bonding agent 8 parts.
The manufacturing process of described low cost alumina firebrick is identical with embodiment 1, and firing time is 4 hours.
Comparative example 1
A kind of high alumina brick, its raw material is by following weight:
(1), fused brown corundum particle: 58 parts, wherein the part by weight of grain diameter to be the fused brown corundum of 1-0mm and grain diameter the be fused brown corundum of 3-1mm is 1:2;
(2), fused brown corundum fine powder 200 order: 30 parts;
(3), alumina powder≤5 micron: 10 parts;
(4), Guangxi white clay 200 order: 2 parts;
The phosphoric acid solution of 85% 7 parts.
The manufacturing process of high alumina brick is:
Premix: fused brown corundum particle in above-mentioned raw materials is mixed by described proportioning, stirs;
Mixing: first the particulate material of premix to be pressed described weight, add bonding agent 85% strength solution and stir, then continue mixing until evenly agglomerating by described weight ratio interpolation fused brown corundum fine powder, alumina powder, Guangxi white clay;
Shaping: mixing rear grog to be weighed by every block high alumina brick fixed weight and pours in mold at 630 tons of forming under the pressure;
Burn till: the high alumina brick after shaping is put into tunnel furnace, 1420 DEG C are burnt till, time 4h.
Comparative example 2
Embodiment 4
A kind of high alumina brick, its raw material is by following weight:
(1) fused brown corundum particle: 55 parts; Wherein the part by weight of grain diameter to be the fused brown corundum of 1-0mm and grain diameter the be fused brown corundum of 3-1mm is 1:2;
(2) fused brown corundum fine powder 200 order: 25 parts;
(3) alumina powder≤5 micron: 27 parts;
(4) Guangxi white clay 200 order: 3 parts;
The phosphoric acid solution 8 parts of special 85%.
Manufacturing process is identical with comparative example 1, and 1400 DEG C of firing times are 6h.
Data Comparison is in table 2.
Table 2
| Index | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Comparative example 1 | Comparative example 2 |
| Close (the g/cm of body 3） | 3.28 | 3.27 | 3.28 | 3.28 | 3.28 | 3.28 |
| Apparent porosity % | 14.5 | 14.2 | 13.7 | 14.1 | 13.9 | 14.1 |
| Cold crushing strength MPa | 118 | 122 | 127 | 121 | 128 | 132 |
| Cracking breakout, % | 3.2 | 3.5 | 4.1 | 3.5 | 5.5 | 5.1 |
| Yield rate, % | 95.3 | 94.7 | 94.5 | 94.8 | 91.8 | 91.5 |
Claims (7)
1. a low cost alumina firebrick, is characterized in that: Al
2o
3han Liang≤88%, be made up of powder and bonding agent, powder quality consists of: fused brown corundum particle: 43-53 part, fused brown corundum fine powder: 20-30 part, alumina powder: 8-12 part, high-alumina refractory grog powder 12-20 part, Guangxi white clay: 2-3 part, bonding agent accounts for the 5-8% of powder gross weight, wherein, bonding agent to be concentration be 85% phosphoric acid solution; High-alumina refractory grog, refer to the sintered low cost alumina firebrick after fragmentation, particle is between 3-1mm, 1-0mm granularity, and 3-1mm granularity: the part by weight of 1-0mm granularity is 1:(1.5 ~ 3).
2. a low cost alumina firebrick, is characterized in that: described: Al
2o
3han Liang≤88%, be made up of powder and bonding agent, powder quality consists of: fused brown corundum particle: 43-53 part, fused brown corundum fine powder: 20-30 part, alumina powder: 8-12 part, high-alumina refractory grog powder 12-20 part, Guangxi white clay: 2-3 part, bonding agent accounts for the 5-8% of powder gross weight, wherein, bonding agent to be concentration be 85% phosphoric acid solution; High-alumina refractory grog is the minus mesh of the sintered following component high alumina brick after fragmentation, particle is between 3-1mm, 1-0mm granularity, and 3-1mm granularity: the part by weight of 1-0mm granularity is 1:(1.5 ~ 3): fused brown corundum particle: 50-63 part, fused brown corundum fine powder: 25-35 part, alumina powder: 10-15 part, Guangxi white clay: 2-3 part, bonding agent accounts for the 6-8% of powder gross weight, wherein, bonding agent to be concentration be 85% phosphoric acid solution.
3. low cost alumina firebrick according to any one of claim 1 or 2, is characterized in that: described described fused brown corundum particle is between 3-1mm, 1-0mm granularity, and 3-1mm granularity: the part by weight of 1-0mm granularity is 1:(1.5 ~ 3).
4. low cost alumina firebrick according to any one of claim 1 or 2, is characterized in that: described fused brown corundum fine powder is 200 object granularities.
5. low cost alumina firebrick according to any one of claim 1 or 2, is characterized in that: described alumina powder granularity is≤5 μm.
6. low cost alumina firebrick according to any one of claim 1 or 2, is characterized in that: described Guangxi White mud pellet degree is 200 orders.
7. low cost alumina firebrick according to any one of claim 1 or 2, is characterized in that: Al in described fused brown corundum particle and fused brown corundum fine powder
2o
3>=94%; Fe
2o
3≤ 0.5%.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108484189A (en) * | 2018-06-08 | 2018-09-04 | 郑州凯翔耐火材料有限公司 | A kind of high thermal shock bauxite high-alumina brick and its production technology |
| CN110734042A (en) * | 2018-07-20 | 2020-01-31 | 淄博华庆耐火材料有限公司 | corundum-SiAlON-silicon nitride gradient brick for sulfur recovery reaction furnace and preparation process thereof |
| CN113185272A (en) * | 2021-05-18 | 2021-07-30 | 中钢洛耐科技股份有限公司 | Anti-permeation high-aluminum refractory material and preparation process thereof |
| CN114573328A (en) * | 2020-12-01 | 2022-06-03 | 云南濮耐昆钢高温材料有限公司 | High-alumina brick produced by using waste high-alumina brick and production process thereof |
| CN115340368A (en) * | 2022-09-29 | 2022-11-15 | 新化县腾宇炉料有限公司 | Brown corundum brick and preparation process thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108484189A (en) * | 2018-06-08 | 2018-09-04 | 郑州凯翔耐火材料有限公司 | A kind of high thermal shock bauxite high-alumina brick and its production technology |
| CN110734042A (en) * | 2018-07-20 | 2020-01-31 | 淄博华庆耐火材料有限公司 | corundum-SiAlON-silicon nitride gradient brick for sulfur recovery reaction furnace and preparation process thereof |
| CN114573328A (en) * | 2020-12-01 | 2022-06-03 | 云南濮耐昆钢高温材料有限公司 | High-alumina brick produced by using waste high-alumina brick and production process thereof |
| CN113185272A (en) * | 2021-05-18 | 2021-07-30 | 中钢洛耐科技股份有限公司 | Anti-permeation high-aluminum refractory material and preparation process thereof |
| CN115340368A (en) * | 2022-09-29 | 2022-11-15 | 新化县腾宇炉料有限公司 | Brown corundum brick and preparation process thereof |
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