CN105272285A - Al2O3-CaO-C brick for ladle bottom and preparation method thereof - Google Patents
Al2O3-CaO-C brick for ladle bottom and preparation method thereof Download PDFInfo
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- CN105272285A CN105272285A CN201510640063.8A CN201510640063A CN105272285A CN 105272285 A CN105272285 A CN 105272285A CN 201510640063 A CN201510640063 A CN 201510640063A CN 105272285 A CN105272285 A CN 105272285A
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Abstract
The invention relates to an Al2O3-CaO-C brick for ladle bottom. The Al2O3-CaO-C brick is prepared from the following raw materials (by weight): 20-60 parts of aluminium-calcium particles, 10-80 parts of 88 alumina particles, 5-8 parts of graphite, 25-40 parts of co-ground powder and 2-4 parts of a binder. The raw material aluminium-calcium particles of the brick can be produced by selection of waste residue generated from the aluminum smelting industry, so as to greatly reduce production cost. The brick can remove impurities in molten steel and has a certain impurity removal effect on molten steel.
Description
Technical field
The present invention relates to a kind of refractory materials, particularly relate to a kind of bottom of steel ladle Al
2o
3-CaO-C brick and preparation method thereof.
Background technology
Along with developing rapidly of Iron And Steel Industry, ladle has been not only the container holding molten steel, is also responsible for the refining treatment of molten steel.Bottom of steel ladle is the important component part of ladle, not only will stand high-temperature molten steel and repeatedly water the temperature shock of steel and tapping, waters the intense impact of steel molten steel, and will carry the stirring of refining process and the erosion action of slag.Thus wrap end refractory materials and will have excellent thermal shock resistance, outstanding shock resistance and good erosion resistance.
The performance characteristics such as use temperature is high because having for Al2O3MgOC Bricks, good thermal shock stability, shock resistance strong, slag-resistant aggressiveness is good, are widely used in bottom of steel ladle.In steel industry stagnant today, the inferior position of Al2O3MgOC Bricks becomes clear day by day.First, raw materials cost is high, and the price of the raw material high grade bauxite of Al2O3MgOC Bricks, Brown Alundum, white fused alumina is all higher than 3500 yuan/ton; Secondly, Al2O3MgOC Bricks containing can the component of cleaning molten steel, be unfavorable for the smelting of Clean Steel.The thing phase composite of Al2O3MgOC Bricks is mainly Al
2o
3, MgO, MgOAl
2o
3, C etc., containing can the component CaO of cleaning molten steel, the removal of unfavorable molten steel impurity; Again, when ladle rolls off the production line, remain residual brick thicker, at the bottom of a large amount of available packages, resistance to material an innocent person removes, and not only wastes resistance to aptitude source but also increases environmental pollution.
Summary of the invention
(1) technical problem that will solve
In order to make up the deficiency of conventional aluminum magnesia carbon brick, the present invention has researched and developed a kind of bottom of steel ladle Al
2o
3-CaO-C brick, has the significance that raw materials cost is low, reduce the wasting of resources, weaken environmental pollution.
(2) technical scheme
Al of the present invention
2o
3-CaO-C brick is prepared from by the raw material comprising following weight part: the bonding agent of 20-60 part aluminium calcium particle, 10-80 part 88 alumina particle, the graphite of 5 ~ 8 parts, the common abrasive dust of 25-40 part and 2-4 part.
In the present invention, described aluminium calcium particle is the aluminium slag that aluminium metallurgy process produces, its density>=3.33g/cm
3; Preferred wherein Al
2o
3mass percentage be the mass percentage of 73 ~ 78%, CaO be 8 ~ 12%.
In the present invention, the particle diameter of described aluminium calcium particle is 3mm ~ 5mm; Or described aluminium calcium particle is the granular mixture of 3mm ~ 5mm and 1mm ~ 3mm (not containing 1mm) two kinds of particle diameters.In the present invention, the density>=3.30g/cm of described 88 alumina particles
3, preferably wherein Al
2o
3mass percentage be 88 ~ 90%, SiO
2mass percentage be 0.05 ~ 5.0%.
In the present invention, the particle diameter of described 88 alumina particles is 0.05 ~ 1mm; Or described 88 alumina particles are the granular mixture of 1mm ~ 3mm and 0.05 ~ 1mm (not containing 1mm) two kinds of particle diameters.
In the present invention, described abrasive dust is altogether selected from one or more in 90 alumina, Brown Alundum fine powder, electric smelting spinel fine powder, alumina powder, metallic aluminium powder, metallic silicon power, boron carbide micro powder, silicon carbide micro-powder, graphite, urotropine.
In the present invention, described abrasive dust altogether comprises 90 alumina, 5 ~ 14 parts of Brown Alundum fine powders, the silicon carbide micro-powder of 0.1 ~ 1.5 part, the metallic aluminium powder of 0.1 ~ 2 part and 0.1 ~ 2 part of urotropine of 8 ~ 13 parts.
In the present invention, the granularity of described 90 alumina fine powders is 180 ~ 200 orders, volume density 3.40 ~ 3.55g/cm
3; Preferred Al
2o
3mass percentage 89.5 ~ 95%, S
io
2mass percentage 1 ~ 3.4%.
In the present invention, the granularity of described Brown Alundum fine powder is 180 ~ 200 orders, volume density>=3.89g/cm3; Preferred Al
2o
3mass percentage 95.0 ~ 98.0%, SiO
2mass percentage 0.2 ~ 1.0%.
In the present invention, the granularity of described graphite is mass percentage >=95.0% of 80 ~ 100 orders, solid content, mass percentage≤4.5% of ash, mass percentage≤1.2% of fugitive constituent, mass percentage≤0.05% of moisture content.
In the present invention, the granularity of described metallic aluminium powder is mass percentage >=99.9% of 300 ~ 320 orders, preferred Al.
In the present invention, the granularity of described silicon carbide micro-powder is 3 μm ~ 5 μm, mass percentage >=99.0% of silicon carbide.
In the present invention, described bonding agent is thermosetting resin, and preferred viscosities is greater than 12000NS/m
2thermosetting resin, be specifically chosen as those skilled in the art and grasp, the present invention is not particularly limited this, and the common thermosetting resin that can be used for making steel ladle magnesia carbon brick, Al2O3MgOC Bricks, magnesia-alumina-carbon brick etc. may be used to realize the present invention.
Al of the present invention
2o
3-CaO-C brick, is prepared from by the raw material comprising following weight part: aluminium calcium particle 25 ~ 50 parts; 88 20 ~ 45 parts, alumina; 90 10 ~ 12 parts, alumina, Brown Alundum fine powder 9 ~ 11 parts, 5 ~ 7 parts, graphite, silicon carbide micro-powder 0.1 ~ 1.5 part, metallic aluminium powder 0.1 ~ 2 part, urotropine 0.1 ~ 2 part, viscosity is greater than 12000NS/m
2thermosetting resin 2 ~ 4 parts;
Density>=the 3.33g/cm of described aluminium calcium particle
3;
Density>=the 3.30g/cm of described 88 alumina particles
3;
The granularity of described 90 alumina fine powders is 180 ~ 200 orders, volume density 3.40 ~ 3.55g/cm
3;
The granularity of described Brown Alundum fine powder is 180 ~ 200 orders, volume density >=3.89g/cm3; The granularity of described graphite is 80 ~ 100 orders; The granularity of described metallic aluminium powder is 300 ~ 320 orders; The granularity of described silicon carbide micro-powder is 3 μm ~ 5 μm.
Another object of the present invention is to provide described Al
2o
3the making method of-CaO-C brick, comprises the steps: that (1) is by proportional quantity preparation abrasive dust (90 alumina, Brown Alundum fine powder, SiC micro mist, metallic aluminium powder and urotropine) altogether, mixes 10 ~ 15 minutes by it in high speed mixing pan;
(2) by proportional quantity, aluminium calcium particle and 88 alumina particles are dry mixed 2 ~ 3 minutes, then disposablely in 2 minutes slowly add bonding agent, wet mixing added graphite after 3 ~ 5 minutes, remix adds step (1) gained abrasive dust altogether after 5 ~ 8 minutes, mix discharging after 20 ~ 30 minutes;
(3) adobe is obtained with brick pressing machine is shaping;
(4) by described adobe respectively at 50 DEG C-60 DEG C, 100 DEG C-110 DEG C, under the condition of 200 DEG C-210 DEG C baking be not less than 8 hours, can Al be obtained
2o
3-CaO-C brick.
(3) beneficial effect
Al of the present invention
2o
3-CaO-C has following beneficial effect:
1) raw materials cost is low, and the price of the raw material high grade bauxite of Al2O3MgOC Bricks, Brown Alundum, white fused alumina is all higher than 3500 yuan/ton; Aluminium calcium particle of the present invention can select the waste residue produced in aluminum smelting industry to produce, and greatly reduces cost.
2) Al2O3MgOC Bricks is containing can the component of cleaning molten steel, and adopt material of the present invention, CaO can with S, P, the Al in molten steel
2o
3and SiO
2deng nonmetal inclusion generation chemical reaction, reaction product is adsorbed on CaO refractory materials or peels off, and floats up to slag blanket.Thus play certain removal of impurities effect;
3) when ladle rolls off the production line, remain residual brick thicker, at the bottom of a large amount of available packages, resistance to material an innocent person removes, and not only waste resistance to aptitude source but also increase environmental pollution, bottom of steel ladle of the present invention can avoid the problems referred to above.
Embodiment
Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
In following examples, all raw materials are known commercially available prod, as a reference, provide the correlation parameter of part material:
Density>=the 3.30g/cm of 88 alumina particles described in following examples
3, preferably wherein Al
2o
3mass percentage be 88 ~ 90%, SiO
2mass percentage be 0.05 ~ 5.0%; The granularity of described 90 alumina fine powders is 180 ~ 200 orders, volume density 3.40 ~ 3.55g/cm
3; Preferred Al
2o
3mass percentage 89.5 ~ 95%, S
io
2mass percentage 1 ~ 3.4%; The granularity of described Brown Alundum fine powder is 180 ~ 200 orders, volume density>=3.89g/cm3; Al
2o
3mass percentage 95.0 ~ 98.0%, SiO
2mass percentage 0.2 ~ 1.0%; The granularity of described graphite is mass percentage>=95.0% of 80 ~ 100 orders, solid content, mass percentage≤4.5% of ash, mass percentage≤1.2% of fugitive constituent, mass percentage≤0.05% of moisture content; The granularity of described metallic aluminium powder is mass percentage>=99.9% of 300 ~ 320 orders, Al; The granularity of described silicon carbide micro-powder is 3 μm ~ 5 μm, mass percentage>=99.0% of silicon carbide.
Aluminium solid impurity particle described in embodiment comes from the waste residue that certain aluminum smelting industry produces, wherein Al
2o
3mass percentage be the mass percentage of 78%, CaO be 12%, volume density 3.45g/cm
3.
Embodiment 1
The present embodiment relates to a kind of Al
2o
3-CaO-C brick, be prepared from by the raw material comprising following weight part: the aluminium calcium particle 25 parts of particle diameter 3 ~ 5mm, the aluminium calcium particle 25 parts of particle diameter 1 ~ 3mm, particle diameter is less than 20 parts, 88 alumina of 1mm, 200 11 parts, object 90 alumina, 200 object Brown Alundum fine powders 10 parts, 100 6 parts, object graphite, the silicon carbide micro-powder of particle diameter 5um 1 part, 320 object metallic aluminium powders 1.5 parts, urotropine 0.5 part, viscosity is greater than 12000NS/m
2bonding agent thermosetting resin 2.8 parts.
Embodiment 2
The present embodiment relates to a kind of Al
2o
3-CaO-C brick, comprise the raw material of following weight part: the aluminium solid impurity particle of particle diameter 3 ~ 5mm 25 parts, 25 parts, 88 alumina of particle diameter 1 ~ 3mm, particle diameter is less than 20 parts, 88 alumina of 1mm, 200 11 parts, object 90 alumina, 200 object Brown Alundum fine powders 10 parts, 100 6 parts, object graphite, the silicon carbide micro-powder of particle diameter 5um 1 part, 320 object metallic aluminium powders 1.5 parts, urotropine 0.5 part, bonding agent thermosetting resin 2.8 parts.
Embodiment 3
The present embodiment relates to a kind of Al
2o
3-CaO-C brick, comprises the raw material of following weight part: the aluminium solid impurity particle of particle diameter 3 ~ 5mm 20 parts; Particle diameter is less than the alumina particle 35 parts of 1mm, the alumina particle of particle diameter 1 ~ 3mm 45 parts; 180 9 parts, object 90 alumina, 180 object Brown Alundum fine powders 8 parts, 80 5 parts, object graphite, the silicon carbide micro-powder of particle diameter 3um 1 part, 300 object metallic aluminium powders 1.5 parts, urotropine 0.5 part, viscosity is greater than 12000NS/m
2bonding agent thermosetting resin 4 parts.
Embodiment 4
The present embodiment relates to a kind of Al
2o
3-CaO-C brick, comprises the raw material of following weight part: the aluminium solid impurity particle of particle diameter 3 ~ 5mm 30 parts, the aluminium solid impurity particle of particle diameter 1 ~ 3mm 30 parts; Particle diameter is less than the alumina particle 10 parts of 1mm; 180 13 parts, object 90 alumina, 180 object Brown Alundum fine powders 14 parts, 80 8 parts, object graphite, the silicon carbide micro-powder of particle diameter 3um 1.5 parts, 300 object metallic aluminium powders 2 parts, urotropine 2 parts, viscosity is greater than 12000NS/m
2bonding agent thermosetting resin 2 parts.
Embodiment 5
Present embodiments provide the arbitrary described Al of embodiment 1-4
2o
3the preparation method of-CaO-C brick, specifically comprises following preparation process:
(1) by proportional quantity preparation abrasive dust altogether, in high speed mixing pan, 10 ~ 15 minutes are mixed;
(2) by proportional quantity, all aluminium calcium particles and 88 alumina particles are dry mixed 2 ~ 3 minutes, then disposablely in 2 minutes slowly bonding agent is added, wet mixing added graphite after 3 ~ 5 minutes, remix adds step (1) gained abrasive dust altogether after 5 ~ 8 minutes, mix discharging after 20 ~ 30 minutes;
(3) adobe is obtained with brick pressing machine is shaping;
(4) by described adobe respectively at 50 DEG C-60 DEG C, 100 DEG C-110 DEG C, under the condition of 200 DEG C-210 DEG C baking be not less than 8 hours, can Al be obtained
2o
3-CaO-C brick.
Comparative example
This comparative example relates to a kind of Al2O3MgOC Bricks, is made up of the material of following weight part: the Brown Alundum particle of particle diameter 3 ~ 5mm 25 parts, the Brown Alundum particle of particle diameter 1 ~ 3mm 25 parts; Particle diameter is less than the white fused alumina 20 parts of 1mm; 180 object white fused aluminas 13 parts, 180 object white fused aluminas 14 parts, 80 8 parts, object graphite, the silicon carbide micro-powder of particle diameter 3um 1.5 parts, 300 object metallic aluminium powders 2 parts, urotropine 2 parts, thermosetting resin 1 part.
Experimental example
Described in embodiment 1 ~ 4 and comparative example, the performance of brick is in table 1, and table 1 is as follows:
Table 1
Although above the present invention is described in detail with a general description of the specific embodiments, on basis of the present invention, can make some modifications or improvements it, this will be apparent to those skilled in the art.Therefore, these modifications or improvements without departing from theon the basis of the spirit of the present invention, all belong to the scope of protection of present invention.
Claims (10)
1. a bottom of steel ladle Al
2o
3-CaO-C brick, is characterized in that, is prepared from by the raw material comprising following weight part: the bonding agent of 20-60 part aluminium calcium particle, 10-80 part 88 alumina particle, the graphite of 5 ~ 8 parts, the common abrasive dust of 25-40 part and 2-4 part.
2. Al according to claim 1
2o
3-CaO-C brick, is characterized in that, described aluminium calcium particle is the aluminium slag that aluminium metallurgy process produces, its density>=3.33g/cm
3; Preferred wherein Al
2o
3mass percentage be the mass percentage of 73 ~ 78%, CaO be 8 ~ 12%.
3. Al according to claim 1 and 2
2o
3-CaO-C brick, is characterized in that, the particle diameter of described aluminium calcium particle is 3mm ~ 5mm; Or described aluminium calcium particle is the granular mixture of 3mm ~ 5mm and 1mm ~ 3mm two kinds of particle diameters.
4. Al according to claim 1 and 2
2o
3-CaO-C brick, is characterized in that, the density>=3.30g/cm of described 88 alumina particles
3, preferably wherein Al
2o
3mass percentage be 88 ~ 90%, SiO
2mass percentage be 0.05 ~ 5.0%.
5. the Al according to claim 1 or 4
2o
3-CaO-C brick, is characterized in that, the particle diameter of described 88 alumina particles is 0.05 ~ 1mm; Or described 88 alumina particles are the granular mixture of 1mm ~ 3mm and 0.05 ~ 1mm, two kinds of particle diameters.
6. Al according to claim 1
2o
3-CaO-C brick, is characterized in that, described abrasive dust altogether comprises 90 alumina, 5 ~ 14 parts of Brown Alundum fine powders, the silicon carbide micro-powder of 0.1 ~ 1.5 part, the metallic aluminium powder of 0.1 ~ 2 part and 0.1 ~ 2 part of urotropine of 8 ~ 13 parts.
7. the Al according to claim 1 or 6
2o
3-CaO-C brick, is characterized in that, the granularity of described 90 alumina fine powders is 180 ~ 200 orders, volume density>=3.40g/cm
3; The granularity of described Brown Alundum fine powder is 180 ~ 200 orders, volume density 3.89 ~ g/cm
3; The granularity of described graphite is 80 ~ 100 orders; The granularity of described metallic aluminium powder is 300 ~ 320 orders; The granularity of described silicon carbide micro-powder is 3 μm ~ 5 μm.
8. the Al according to any one of claim 1 ~ 8
2o
3-CaO-C brick, is characterized in that, described bonding agent is thermosetting resin, and preferred viscosities is greater than 12000NS/m
2thermosetting resin.
9. the Al according to any one of claim 1 ~ 8
2o
3-CaO-C brick, is characterized in that, is prepared from by the raw material comprising following weight part: aluminium calcium particle 25 ~ 50 parts; 88 20 ~ 45 parts, alumina; 90 10 ~ 12 parts, alumina, Brown Alundum fine powder 9 ~ 11 parts, 5 ~ 7 parts, graphite, silicon carbide micro-powder 0.1 ~ 1.5 part, metallic aluminium powder 0.1 ~ 2 part, urotropine 0.1 ~ 2 part, viscosity is greater than 12000NS/m
2thermosetting resin 2 ~ 4 parts;
Density>=the 3.33g/cm of described aluminium calcium particle
3; Density>=the 3.30g/cm of described 88 alumina particles
3; The granularity of described 90 alumina fine powders is 180 ~ 200 orders, volume density 3.40 ~ 3.55g/cm
3;
The granularity of described Brown Alundum fine powder is 180 ~ 200 orders, volume density>=3.89g/cm
3;
The granularity of described graphite is 80 ~ 100 orders;
The granularity of described metallic aluminium powder is 300 ~ 320 orders;
The granularity of described silicon carbide micro-powder is 3 μm ~ 5 μm.
10. the Al described in any one of claim 1 ~ 9
2o
3the making method of-CaO-C, is characterized in that, comprises the steps: that (1) is by proportional quantity preparation abrasive dust altogether, and it is mixed 10 ~ 15 minutes in high speed mixing pan;
(2) by proportional quantity, aluminium calcium particle and 88 alumina particles are dry mixed 2 ~ 3 minutes, then disposablely in 2 minutes slowly add bonding agent, wet mixing added graphite after 3 ~ 5 minutes, remix adds step (1) gained abrasive dust altogether after 5 ~ 8 minutes, mix discharging after 20 ~ 30 minutes;
(3) adobe is obtained with brick pressing machine is shaping;
(4) by described adobe respectively at 50 DEG C-60 DEG C, 100 DEG C-110 DEG C, under the condition of 200 DEG C-210 DEG C baking be not less than 8 hours, can Al be obtained
2o
3-CaO-C brick.
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|---|---|---|---|
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|---|---|---|---|
| CN201510640063.8A CN105272285B (en) | 2015-09-30 | 2015-09-30 | A kind of bottom of steel ladle Al2O3CaO C bricks and preparation method thereof |
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| CN105272285B CN105272285B (en) | 2017-09-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106977181A (en) * | 2017-04-01 | 2017-07-25 | 海城市中兴高档镁质砖有限公司 | A kind of BOF Hood magnesium-aluminum-calcium titanium carbon brick and preparation method thereof |
| CN112941268A (en) * | 2021-02-01 | 2021-06-11 | 鞍山市和丰耐火材料有限公司 | Production process of crack-free long-life composite desulfurization powder gun and powder gun structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009019305A2 (en) * | 2007-08-08 | 2009-02-12 | Imerys Ceramics France | Porous ceramic bodies and process for their preparation |
| CN101613207A (en) * | 2008-12-31 | 2009-12-30 | 北京利尔高温材料股份有限公司 | A kind of low-carbon corundum spinelle brick for refined steel ladles and preparation method thereof |
-
2015
- 2015-09-30 CN CN201510640063.8A patent/CN105272285B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009019305A2 (en) * | 2007-08-08 | 2009-02-12 | Imerys Ceramics France | Porous ceramic bodies and process for their preparation |
| CN101613207A (en) * | 2008-12-31 | 2009-12-30 | 北京利尔高温材料股份有限公司 | A kind of low-carbon corundum spinelle brick for refined steel ladles and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106977181A (en) * | 2017-04-01 | 2017-07-25 | 海城市中兴高档镁质砖有限公司 | A kind of BOF Hood magnesium-aluminum-calcium titanium carbon brick and preparation method thereof |
| CN112941268A (en) * | 2021-02-01 | 2021-06-11 | 鞍山市和丰耐火材料有限公司 | Production process of crack-free long-life composite desulfurization powder gun and powder gun structure |
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| CN105272285B (en) | 2017-09-26 |
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