CN103058672A - Aluminum chromium-mullite refractory material and its production method - Google Patents
Aluminum chromium-mullite refractory material and its production method Download PDFInfo
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- CN103058672A CN103058672A CN2011103214511A CN201110321451A CN103058672A CN 103058672 A CN103058672 A CN 103058672A CN 2011103214511 A CN2011103214511 A CN 2011103214511A CN 201110321451 A CN201110321451 A CN 201110321451A CN 103058672 A CN103058672 A CN 103058672A
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- mullite
- aluminium chromium
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- chromium slag
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Abstract
The invention discloses an aluminum chromium-mullite refractory material and its production method. The thermal shock resistance of the material is improved, and the porosity is reduced. The aluminum chromium-mullite refractory material is composed of the following components by mass: 87%-95% of aluminum chromium slag; and 5%-13% of electrically fused mullite. The production method of the aluminum chromium-mullite refractory material includes: raw material processing; magnetic separation treatment; screening; mulling; as well as molding and product formation. The method provided in the invention is characterized by coordinating the aluminum chromium slag with the electrically fused mullite, and selecting paper pulp waste liquid as a bonding agent to produce the aluminum chromium-mullite refractory material. The industrial production waste, aluminum chromium slag, is fully utilized. The material disclosed in the invention has the advantages of simple production process and long service life, thus well meeting the production requirements of non-ferrous metallurgical kilns.
Description
Technical field
The invention belongs to fire resisting material field, particularly a kind of aluminium chromium-mullite refractory and production method thereof.
Background technology
Along with the lasting deterioration of day by day nervous, the environmental problem of energy resource, development and use trade waste and the technology with certain use meaning will more and more come into one's own.Aluminium chromium slag is take chromite as raw material, and metallic aluminium is reductive agent, and the slag that forms when smelting Chrome metal powder also claims the chromium slag.This slag Al
2O
3+ Cr
2O
3The quality percentage composition is more than 82%, and contain the solid impurity of the oxide compounds such as iron of quality percentage composition 8～12%, and refractoriness can be carried out resource reutilization, production non-ferrous metal metallurgy raw material for refractory greater than 1580 ℃.
Non-ferrous metal stove refractory materials work under bad environment, the refractory surface component can be invaded because of the hot metal liquid corrosion and be entered in the molten metal in smelting process, affects quality product, and is when particularly producing highly purified metal or alloy, particularly outstanding.In addition, require refractory materials to have preferably heat-shock resistance in the smelting process, the less formation crackle of energy under chilling, anxious heat condition, generation is peeled off, and satisfies certain work-ing life.And the aluminium chrome refractory causes fire performance desirable not enough generally because its thermal shock resistance is poor, thereby the aluminium chrome refractory is subject to certain restrictions in some Application Areas.
Consult patent documentation, open (bulletin) number CN1227202 of Chinese patent, name is called " utilizing chromium smelting sludge to produce the processing method of refractory material Al-Cr brick ", has proposed a kind ofly to prepare burden as raw material separately with aluminium chromium slag, is pressed into product application in the scheme of producing.The problem that the method exists is that thermal shock resistance is poor, can not satisfy on-the-spot performance requriements to refractory brick.Other one piece of document, open (bulletin) number CN101066876 of Chinese patent, name is called " with the production technique of high grade refractory material with alumina-chrome slag ", proposed a kind ofly aluminium chromium slag itself is carried out chemical process to process, remove low-melting basic oxide, the method production cost can significantly improve.
Mullite is Al
2O
3-SiO
2The binary compound of unique stable existence under the normal pressure in the two component system, chemical formula is 3Al
2O
32SiO
2Usually with synthetic such as sintering process or electric smelting methods, it is a kind of refractory materials of high-quality, it has the characteristics such as expansion is even, thermal shock resistance is fabulous, load softening point is high, the high temperature creep value is little, hardness is large, resistance to chemical corrosion is good, but natural mullite is considerably less, tooling cost is higher, and it is more suitable for using as a kind of additive.
Summary of the invention
The invention provides a kind of nonferrous metallurgy with aluminium chromium-mullite refractory and production method thereof, improved material thermal shock resistance, reduced void content.
Its mass percent component concentration of aluminium chromium-mullite refractory provided by the invention is as follows:
Aluminium chromium slag 87%～95%
Electrofused mullite 5%～13%
Above-mentioned aluminium chromium slag contains Al
2O
3Mass percent 70～72%; Contain Cr
2O
3Mass percent 10～12%;
Above-mentioned electrofused mullite contains 3Al
2O
32SiO
2Mass percent 90～95%.
The production method of aluminium chromium-mullite refractory provided by the invention may further comprise the steps:
A. industrial aluminum chromium slag and electrofused mullite are got in starting material and processing, and aluminium chromium slag and electrofused mullite are pulverized respectively and fine grinding, and the granularity of pulverizing and fine grinding is below the 5mm.
B. magnetic separation is processed, and the aluminium chromium slag after pulverizing and the fine grinding is carried out magnetic separation process, and removes ferromagnetic material wherein.
C. screening, the aluminium chromium slag that screening is told and the granularities at different levels of electrofused mullite, partition size is respectively 3-2mm; 2-1mm; 1-0mm; 180 orders and 325 orders.
D. mix, with mass percent 87%～95%, granularity is 3mm-325 purpose aluminium chromium slag and mass percent 5%～13%, and granularity is that 3mm-180 purpose electrofused mullite mixes, the spent pulping liquor wedding agent of adding material total amount mass percent 3%～5% stirs again.
E. moulding and goods are pressed into the base substrate of different shape with above-mentioned mixing material, burn till through 1350 ℃ of-1500 ℃ of high temperature, and being incubated 10-12 hour becomes goods.
The present invention compares with existing aluminium chromium refractory materials and production method thereof, and its significant beneficial effect is:
Characteristics of the present invention are that aluminium chromium slag, electrofused mullite are cooperated, and wedding agent is selected spent pulping liquor, produce aluminium chromium-mullite refractory.Take full advantage of this industrial produced wastes of aluminium chromium slag.Aluminium chromium slag main mine phase is chromium corundum, and the refractory materials main drawback of making is that thermal shock resistance is poor.The present invention is for improving its thermal shock resistance, and having introduced second solid phase is mullite and suitable wedding agent.Because mullite is different from the thermal expansivity of chromium corundum, at high temperature the contact site produces structural stress, produces microcrack, and the not obvious reduction intensity of this crackle can rejected heat stress.Adopt the water quick cooling method that the goods heat-shock resistance is detected by original 2 times brings up to 8 times in the laboratory.Thereby improved the thermal shock resistance of material, production technique of the present invention is simple, and long product lifecycle can satisfy the Non-ferrous Metals Metallurgy Furnace And Kiln production requirement preferably.
Embodiment
The below describes the present invention in detail with embodiment:
Embodiment 1
To contain Al
2O
3Mass percent is 70～72%, contains Cr
2O
3Mass percent is 10～12% aluminium chromium slag; Contain 3Al
2O
32SiO
2Mass percent is that 90～95% electrofused mullite is pulverized respectively and fine grinding, pulverizes and the granularity of fine grinding is 5-0.044mm.Aluminium chromium slag is carried out magnetic separation process, remove ferromagnetic material wherein, will pulverize and the aluminium chromium ballast screen of fine grinding divides, carry out size classification, be respectively 3-2mm, 2-1mm, 1-0mm, 180 orders, 325 orders; With the electrofused mullite screening of pulverizing and fine grinding, carry out size classification, be respectively 3-2mm, 180 orders.Then, get above-mentioned mass percent and be 92% aluminium chromium slag, the mass percent of the granularities at different levels of aluminium chromium slag is: 3-2mm35%, 2-1mm6%, 1-0mm18%, 180 orders 20%, 325 orders 13%, getting above-mentioned mass percent is 8% electrofused mullite, the granularity of electrofused mullite is 3-2mm, adding material total mass per-cent is 3% spent pulping liquor wedding agent again, and above-mentioned material is carried out mix and blend.Use friction press, compression moulding under 200MPa pressure is burnt till through 1500 ℃ of high temperature, and being incubated 12 hours becomes goods, forms aluminium chromium-mullite refractory.
Embodiment 2
To contain Al
2O
3Mass percent is 70～72%, contains Cr
2O
3Mass percent is 10～12% aluminium chromium slag; Contain 3Al
2O
32SiO
2Mass percent is that 90～95% electrofused mullite is pulverized respectively fine grinding, pulverizes and the granularity of fine grinding is 5-0.044mm.Aluminium chromium slag is carried out magnetic separation process, remove ferromagnetic material wherein, will pulverize and the aluminium chromium ballast screen of fine grinding divides, carry out size classification, be respectively 3-2mm, 2-1mm, 1-0mm, 180 orders, 325 orders; With the electrofused mullite screening of pulverizing and fine grinding, carry out size classification, be respectively 3-2mm, 180 orders.Then, get the aluminium chromium slag of above-mentioned mass percent 87%, the mass percent of the granularities at different levels of aluminium chromium slag is: 3-2mm35%, 2-1mm6%, 1-0mm18%, 180 orders 15%, 325 orders 13%, get above-mentioned electrofused mullite, wherein the mass percent of 3-2mm is that 8%, 180 purpose mass percents are 5%, adding material total mass per-cent is 5% spent pulping liquor wedding agent again, and above-mentioned material is carried out mix and blend.Use friction press, carry out moulding under 200MPa pressure, burn till through 1500 ℃ of high temperature, being incubated 12 hours becomes goods.Form aluminium chromium-mullite refractory.
Embodiment 3
To contain Al
2O
3Mass percent is 70～72%, contains Cr
2O
3Mass percent is 10～12% aluminium chromium slag; Contain 3Al
2O
32SiO
2Mass percent is that 90～95% electrofused mullite is pulverized respectively fine grinding, pulverizes and the granularity of fine grinding is 5-0.044mm.Aluminium chromium slag is carried out magnetic separation process, remove ferromagnetic material wherein, will pulverize and the aluminium chromium ballast screen of fine grinding divides, carry out size classification, be respectively 3-2mm, 2-1mm, 1-0mm, 180 orders, 325 orders; With the electrofused mullite screening of pulverizing and fine grinding, carry out size classification, be respectively 3-2mm, 180 orders.Then, get above-mentioned mass percent and be 95% aluminium chromium slag, the granularity mass percents at different levels of aluminium chromium slag are: 3-2mm43%, 2-1mm6%, 1-0mm18%, 180 orders 15%, 325 orders 13%, getting above-mentioned 180 order electrofused mullite mass percents is 5%, adding material total mass per-cent is 5% spent pulping liquor wedding agent again, and above-mentioned material is carried out mix and blend.Use friction press, carry out moulding under 200MPa pressure, burn till through 1500 ℃ of high temperature, being incubated 12 hours becomes goods, forms aluminium chromium-mullite refractory.
Claims (6)
1. aluminium chromium-mullite refractory is characterized in that this refractory quality per-cent component concentration is as follows:
Aluminium chromium slag 87%～95%
Electrofused mullite 5%～13%
Above-mentioned aluminium chromium slag contains Al
2O
3Mass percent 70～72%; Contain Cr
2O
3Mass percent 10～12%;
Above-mentioned electrofused mullite contains 3Al
2O
32SiO
2Mass percent 90～95%.
2. the production method of aluminium chromium-mullite refractory claimed in claim 1 is characterized in that the method may further comprise the steps:
A. industrial aluminum chromium slag and electrofused mullite are got in starting material and processing, and aluminium chromium slag and electrofused mullite are pulverized respectively and fine grinding, and the granularity of pulverizing and fine grinding is below the 5mm;
B. magnetic separation is processed, and the aluminium chromium slag after pulverizing and the fine grinding is carried out magnetic separation process, and removes ferromagnetic material wherein;
C. screening, the aluminium chromium slag that screening is told and the granularities at different levels of electrofused mullite, partition size is respectively 3-2mm; 2-1mm; 1-0mm; 180 orders and 325 orders;
D. mix, with mass percent 87%～95%, granularity is 3mm-325 purpose aluminium chromium slag and mass percent 5%～13%, and granularity is that 3mm-180 purpose electrofused mullite mixes, the spent pulping liquor wedding agent of adding material total amount mass percent 3%～5% stirs again;
E. moulding and goods are pressed into the base substrate of different shape with the above-mentioned material that mixes, and burn till through 1350 ℃ of-1500 ℃ of high temperature, and being incubated 10-12 hour becomes goods.
3. the production method of aluminium chromium-mullite refractory according to claim 2, it is characterized in that getting in the steps d mass percent and be 92% aluminium chromium slag, the mass percent of the granularities at different levels of aluminium chromium slag is: 3-2mm35%, 2-1mm6%, 1-0mm18%, 180 orders 20%, 325 orders 13%, getting mass percent is 8% electrofused mullite, the granularity of electrofused mullite is 3-2mm, and adding material total mass per-cent is 3% spent pulping liquor wedding agent again.
4. the production method of aluminium chromium-mullite refractory according to claim 2, it is characterized in that getting in the steps d aluminium chromium slag of mass percent 87%, the mass percent of the granularities at different levels of aluminium chromium slag is: 3-2mm35%, 2-1mm6%, 1-0mm18%, 180 orders 15%, 325 orders 13%, mullite is melted in power taking, wherein the mass percent of 3-2mm is that 8%, 180 purpose mass percents are 5%, and adding material total mass per-cent is 5% spent pulping liquor wedding agent again.
5. the production method of aluminium chromium-mullite refractory according to claim 2, it is characterized in that getting in the steps d mass percent and be 95% aluminium chromium slag, the granularity mass percents at different levels of aluminium chromium slag are: 3-2mm43%, 2-1mm6%, 1-0mm18%, 180 orders 15%, 325 orders 13%, getting 180 order electrofused mullite mass percents is 5%, and adding material total mass per-cent is 5% spent pulping liquor wedding agent again.
6. the production method of aluminium chromium-mullite refractory according to claim 2 is characterized in that adopting among the step e friction press compression moulding greater than 100MPa.
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| CN2011103214511A CN103058672A (en) | 2011-10-20 | 2011-10-20 | Aluminum chromium-mullite refractory material and its production method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106242602A (en) * | 2016-08-19 | 2016-12-21 | 郑州市瑞沃耐火材料有限公司 | High-toughness wear-resistant gravity flow pouring material |
| CN106431370A (en) * | 2016-09-09 | 2017-02-22 | 武汉科技大学 | Mullite raw material adopting alumina-chrome slag as main ingredient and preparation method thereof |
| CN111423222A (en) * | 2020-03-23 | 2020-07-17 | 锦州集信高温材料有限公司 | Method for producing chrome corundum brick for non-ferrous metal smelting fuming furnace or side-blown furnace with reduction reaction resistance and thermal shock resistance |
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|---|---|---|---|---|
| CN1315305A (en) * | 2000-03-27 | 2001-10-03 | 赵文厚 | Refractory Cr-Al material |
| CN1341574A (en) * | 2000-09-06 | 2002-03-27 | 冶金工业部洛阳耐火材料研究院 | Chrome diamond spar product |
| CN1417165A (en) * | 2002-12-15 | 2003-05-14 | 赵文厚 | Al-Cr-Ti refractory material |
| CN1513802A (en) * | 2002-07-08 | 2004-07-21 | 赵文厚 | Aluminium chromium guality refractory material and its production method |
-
2011
- 2011-10-20 CN CN2011103214511A patent/CN103058672A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1315305A (en) * | 2000-03-27 | 2001-10-03 | 赵文厚 | Refractory Cr-Al material |
| CN1341574A (en) * | 2000-09-06 | 2002-03-27 | 冶金工业部洛阳耐火材料研究院 | Chrome diamond spar product |
| CN1513802A (en) * | 2002-07-08 | 2004-07-21 | 赵文厚 | Aluminium chromium guality refractory material and its production method |
| CN1417165A (en) * | 2002-12-15 | 2003-05-14 | 赵文厚 | Al-Cr-Ti refractory material |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106242602A (en) * | 2016-08-19 | 2016-12-21 | 郑州市瑞沃耐火材料有限公司 | High-toughness wear-resistant gravity flow pouring material |
| CN106431370A (en) * | 2016-09-09 | 2017-02-22 | 武汉科技大学 | Mullite raw material adopting alumina-chrome slag as main ingredient and preparation method thereof |
| CN106431370B (en) * | 2016-09-09 | 2019-04-26 | 武汉科技大学 | Using aluminium chromium slag as mullite synthesizing raw material of major ingredient and preparation method thereof |
| CN111423222A (en) * | 2020-03-23 | 2020-07-17 | 锦州集信高温材料有限公司 | Method for producing chrome corundum brick for non-ferrous metal smelting fuming furnace or side-blown furnace with reduction reaction resistance and thermal shock resistance |
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