CN1117044C - Refractory Cr-Al material - Google Patents
Refractory Cr-Al material Download PDFInfo
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- CN1117044C CN1117044C CN00110269A CN00110269A CN1117044C CN 1117044 C CN1117044 C CN 1117044C CN 00110269 A CN00110269 A CN 00110269A CN 00110269 A CN00110269 A CN 00110269A CN 1117044 C CN1117044 C CN 1117044C
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- slag
- refractory
- chromium
- chromite
- aluminum
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Abstract
The present invention relates to a refractory chromium-aluminum material. The refractory chromium-aluminum material is prepared from the components by the following weight percentage: 50 to 98% of aluminum-chromium slag, 50 to 2% of chromite and a binding agent with the weight of 0.5 to 15% of the total weight of the aluminum-chromium slag and the chromite. The refractory chromium-aluminum material of the present invention has the advantages that most of the advantages of the aluminum-chromium slag as a refractory material are maintained, the defect of low liquid phase temperature of the aluminum-chromium slag in alkaline molten slag with low alkalinity is made up, and the refractability and the high temperature strength of the refractory chromium-aluminum material are greatly improved. Especially, the resistance of the refractory chromium-aluminum material to the erosion and the penetration of alkaline molten slag, acidic molten slag, weak alkaline molten slag, neutral molten slag and molten liquid is enhanced.
Description
The invention belongs to the refractory materials production field, particularly a kind of refractory Cr-Al material.
In the prior art, refractory materials can be divided into acid refractory and basic refractory according to the performance of its acid resistance, basic slag.Acid refractory such as fireclay, quartz sand or the like.Wherein, fireclay has anti-erosion effect preferably in acid slag, but the resistivity to basic slag is relatively poor, its fusing point reduces in basic slag, anti-slag is invaded degradation, and the refractoriness under load of fireclay is lower than refractoriness, maximum operation (service) temperature only is 1450 ℃, and its use range is restricted.The thermal expansivity of quartz sand is bigger, poor heat stability, and the distortion after being heated is big, is unsuitable for using under hot conditions.Magnesia and rhombspar belong to basic refractory, and magnesia has slag resistance preferably to basic slag, and wear resisting property is good, the refractoriness height, but its refractoriness under load is not high, and thermal expansivity is big, under the rapid heat cycle condition, is easy to generate crackle, and reduce work-ing life.Rhombspar has higher refractoriness under load and resists the ability of temperature variation preferably, and the ability of alkali-resistivity slag is also very strong, but its water resisting property extreme difference absorbs airborne moisture content and the phenomenon of bursting apart easily, and shorten work-ing life.
Aluminium chromium slag is the byproduct of metal smelting chromium output, owing to itself just possessed the premium properties of many refractory materialss, thereby wide model is used on metallurgy and Industrial Stoves.This material has fabulous chemical stability, in acid slag, has result of use preferably.But in alkalescence and low alkalinity slag, the liquidus temperature of aluminium chromium slag only is 1400 ℃, and refractoriness reduces, and anti-slag is invaded degradation, and result of use is not ideal enough.
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, solve the problem that existing refractory materials exists in basic slag, provide a kind of in basic slag liquidus temperature height, refractoriness height, anti-slag invade the good refractory Cr-Al material of performance.
The present invention makes (by weight percentage) according to following prescription:
Aluminium chromium slag: 50～98%;
Chromite: 50～2%;
Wedding agent: 0.5～15% of above-mentioned materials gross weight; Wherein, aluminium chromium slag is the byproduct through 2200 ℃ of pyrotic smelting chromium metal outputs, requires composition to be:
AL
2O
3〉=75%, Cr
2O
3〉=10%, other are impurity; Chromite requires composition to be:
Cr
2O
3〉=40%, SiO
2≤ 4%; Above-mentioned composition all by weight percentage.
Above-mentioned said wedding agent is neutral or acid wedding agent, as resin, paper pulp, boric acid, phosphoric acid and aluminum phosphate or the like.
The present invention is a raw material with aluminium chromium slag, has just formed a kind of new amphoteric refractory after adding chromite therein, though aluminium chromium slag is the byproduct of metal smelting chromium slag output, itself has the premium properties of a lot of refractory materialss again, and its major ingredient is AL
2O
3And Cr
2O
3Through after the pyrotic smelting, the unlimited solid solution that generates has high temperature oxidation resisting, high temperature resistance combustion gas erosion, chemical stability is good, characteristics such as hardness is big, wear resistance is good, after adding chromite therein, be easy to high temperature sintering, can form the comparatively neutral chromium-aluminium spinel thing of ideal phase, Mi has mended aluminium chromium slag low shortcoming of liquidus temperature in alkalescence and low basicity slag, all improves a lot on refractoriness, hot strength, especially to basic slag, this material has improved anti-slag invades and anti-permeability performance, and is equally applicable to acidity, weak base and neutral slag and liquation.
Embodiments of the invention are provided below:
Embodiment 1:
Composition satisfactory aluminium chromium slag and chromite are pulverized respectively, and the broken granularity of aluminium chromium ground-slag is 0～15 millimeter, and the granularity that chromite is pulverized is 0～5 millimeter; Aluminium chromium slag after will pulverizing again and chromite carry out magnetic separation respectively to be handled, and removes ferromagnetic material wherein; Then, get 980Kg aluminium chromium slag and mix with the 20Kg chromite, add 90Kg phosphoric acid or aluminum phosphate again, stirring promptly becomes refractory Cr-Al material.
Embodiment 2:
Composition satisfactory aluminium chromium slag and chromite are pulverized respectively, and the broken granularity of aluminium chromium ground-slag is 0～15 millimeter, and the granularity that chromite is pulverized is 0～5 millimeter; Aluminium chromium slag after will pulverizing again and chromite carry out magnetic separation respectively to be handled, and removes ferromagnetic material wherein; Then, get 500Kg aluminium chromium slag and mix with the 500Kg chromite, add 5Kg resin or paper pulp again, stirring promptly becomes refractory Cr-Al material.
Embodiment 3:
Composition satisfactory aluminium chromium slag and chromite are pulverized respectively, the broken granularity of aluminium chromium ground-slag is 0～15 millimeter, the granularity that chromite is pulverized is 0～5 millimeter, and aluminium chromium slag after will pulverizing again and chromite carry out magnetic separation respectively to be handled, and removes ferromagnetic material wherein; Then, get 750Kg aluminium chromium slag and mix with the 250Kg chromite, add 150Kg boric acid again, stirring promptly becomes refractory Cr-Al material.
Above-mentioned refractory Cr-Al material again through 1300～1800 ℃ of high temperature sinterings, can become the various moulded products of refractory Cr-Al material after moulding, drying.
Claims (1)
1, a kind of refractory Cr-Al material is characterized in that; It makes (by weight percentage) according to following prescription:
Aluminium chromium slag: 50～98%;
Chromite: 50～2%;
Wedding agent: 0.5～15% of above-mentioned materials gross weight; Wherein, aluminium chromium slag is the byproduct through 2200 ℃ of pyrotic smelting chromium metal outputs, requires composition to be:
AL
2O
3〉=75%, Cr
2O
3〉=10%, other are impurity; Chromite requires composition to be:
Cr
2O
3〉=40%, SiO
2≤ 4%; Wedding agent is neutral or acid wedding agent;
Above-mentioned composition all by weight percentage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00110269A CN1117044C (en) | 2000-03-27 | 2000-03-27 | Refractory Cr-Al material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00110269A CN1117044C (en) | 2000-03-27 | 2000-03-27 | Refractory Cr-Al material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1315305A CN1315305A (en) | 2001-10-03 |
| CN1117044C true CN1117044C (en) | 2003-08-06 |
Family
ID=4580275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00110269A Expired - Lifetime CN1117044C (en) | 2000-03-27 | 2000-03-27 | Refractory Cr-Al material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1117044C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100391904C (en) * | 2006-10-20 | 2008-06-04 | 赵文厚 | Refractory material of chromium solid solution |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100408916C (en) * | 2005-08-16 | 2008-08-06 | 江苏双良锅炉有限公司 | Frequency conversion and automatically controlled dual-purpose boiler with built-in precombustion chamber using coal water slurry or oil as fuel |
| CN101747062A (en) * | 2008-11-27 | 2010-06-23 | 郑州东方三力耐火材料有限公司 | Ladle upper nozzle brick for steelmaking |
| CN101747063B (en) * | 2008-11-27 | 2013-03-06 | 郑州东方三力耐火材料有限公司 | Aluminium-magnesia carbon brick and preparation method thereof |
| CN101747065A (en) * | 2008-11-29 | 2010-06-23 | 郑州东方三力耐火材料有限公司 | Magnesia carbon brick and preparation method thereof |
| EP2603465B1 (en) * | 2010-08-10 | 2018-09-12 | Saint-Gobain Centre De Recherches Et D'etudes Europeen | Refractory product on the basis of chromic oxide |
| CN103058672A (en) * | 2011-10-20 | 2013-04-24 | 辽宁科技大学 | Aluminum chromium-mullite refractory material and its production method |
| CN102531651B (en) * | 2012-01-11 | 2013-07-31 | 郑州华威耐火材料股份有限公司 | Preparation method for rebonded electrically fused chrome corundum brick |
| CN102603325B (en) * | 2012-03-16 | 2013-12-18 | 刘晨光 | Regenerative magnesium-aluminium-chromium brick and preparation method |
| CN103755362B (en) * | 2013-12-24 | 2015-05-06 | 河南瑞泰耐火材料科技有限公司 | Coating for oxygen lance of nonferrous smelting furnace |
| CN106242535A (en) * | 2016-08-09 | 2016-12-21 | 上海华培动力科技有限公司 | A kind of low pressure casting and suction pouring heat-resisting alloy stalk formula and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032022A (en) * | 1987-08-20 | 1989-03-29 | 海城市高温材料研究所 | Long life high temperature binder |
| CN1072402A (en) * | 1991-11-20 | 1993-05-26 | 高永劲 | Magnalium picotite sand and preparation method |
| CN1216295A (en) * | 1998-07-24 | 1999-05-12 | 赵文厚 | Refractory Mg-Al-Cr material and its production process |
| CN1227202A (en) * | 1998-12-18 | 1999-09-01 | 锦州铁合金工商实业公司冶金建材厂 | Technical process for producing refractory material Al-Cr brick by using chromium smelting sludge |
-
2000
- 2000-03-27 CN CN00110269A patent/CN1117044C/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1032022A (en) * | 1987-08-20 | 1989-03-29 | 海城市高温材料研究所 | Long life high temperature binder |
| CN1072402A (en) * | 1991-11-20 | 1993-05-26 | 高永劲 | Magnalium picotite sand and preparation method |
| CN1216295A (en) * | 1998-07-24 | 1999-05-12 | 赵文厚 | Refractory Mg-Al-Cr material and its production process |
| CN1227202A (en) * | 1998-12-18 | 1999-09-01 | 锦州铁合金工商实业公司冶金建材厂 | Technical process for producing refractory material Al-Cr brick by using chromium smelting sludge |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100391904C (en) * | 2006-10-20 | 2008-06-04 | 赵文厚 | Refractory material of chromium solid solution |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1315305A (en) | 2001-10-03 |
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