CN105418080A - Non-ferrous metallurgy fireproof material and preparation process thereof - Google Patents
Non-ferrous metallurgy fireproof material and preparation process thereof Download PDFInfo
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- CN105418080A CN105418080A CN201410411747.6A CN201410411747A CN105418080A CN 105418080 A CN105418080 A CN 105418080A CN 201410411747 A CN201410411747 A CN 201410411747A CN 105418080 A CN105418080 A CN 105418080A
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- electrofused mullite
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Abstract
The present invention discloses a non-ferrous metallurgy fireproof material and a preparation process thereof, wherein the thermal shock stability of the material is improved, and the gas porosity is reduced. The non-ferrous metallurgy fireproof material comprises, by mass, 80-90% of aluminum chromium slag and 10-20% of fused mullite. The preparation process comprises raw material processing, magnetic separation treatment, screening, mixing, and molding and product obtaining. According to the present invention, the aluminum chromium slag and the fused mullite are matched, and the binding agent selects the paper pulp waste liquid to produce the non-ferrous metallurgy fireproof material, such that the industrial production waste aluminum chromium slag is completely utilized; and the production process is simple, the service life of the product is long, and the non-ferrous metallurgy kiln production requirements can be well met.
Description
Technical field
The invention belongs to fire resisting material field, particularly a kind of nonferrous metallurgy refractory materials and preparation technology thereof.
Background technology
Along with the day by day anxiety of energy resource, the continuous worsening of environmental problem, develop trade waste and there is certain technology of meaning that uses and will more and more come into one's own.Aluminium chromium slag take chromite as raw material, and metallic aluminium is reductive agent, the slag formed when smelting Chrome metal powder, also claims chromium slag.This slag Al2O3+Cr2O3 mass percentage is more than 82%, and the solid impurity of the oxide compound such as iron containing mass percentage 8 ~ 12%, and refractoriness is greater than 1580 DEG C, can carry out resource reutilization, production non-ferrous metal metallurgy raw material for refractory.Non-ferrous metal stove kiln refractory work under bad environment, in smelting process, refractory surface component can enter in molten metal because hot metal liquid corrosion is invaded, and affects quality product, when particularly producing highly purified metal or alloy, particularly outstanding.In addition, require that refractory materials has good heat-shock resistance in smelting process, the less formation crackle of energy under chilling, anxious heat condition, generation is peeled off, and meets certain work-ing life.And aluminium chrome refractory due to its thermal shock resistance poor, cause fire performance desirable not enough generally, thus 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 ", proposes one and prepares burden as raw material separately using aluminium chromium slag, be pressed into product application in the scheme of producing.The method Problems existing is that thermal shock resistance is poor, can not meet the on-the-spot performance requriements to refractory brick.Other one section of document, open (bulletin) number CN101066876 of Chinese patent, name is called " production technique with high grade refractory material with alumina-chrome slag ", propose one and chemical process process is carried out to aluminium chromium slag itself, the basic oxide of removing low melting point, the method production cost can significantly improve.
Mullite is the binary compound of unique stable existence under normal pressure in Al2O3-SiO2 two component system, chemical formula is 3Al2O32SiO2, usually with synthetic such as sintering process or electric smelting methods, it is a kind of refractory materials of high-quality, it has features such as expanding evenly, thermal shock resistance is fabulous, load softening point is high, high temperature creep value is little, hardness is large, resistance to chemical corrosion is good, but natural mullite is considerably less, and tooling cost is higher, it is more suitable for using as a kind of additive.
Summary of the invention
The invention provides a kind of nonferrous metallurgy refractory materials and preparation technology thereof, improve the thermal shock resistance of material, reduce void content.Its mass percent component concentration of nonferrous metallurgy refractory materials provided by the invention is as follows:
A kind of nonferrous metallurgy refractory materials and preparation technology thereof, is characterized in that this refractory quality percent composition content is as follows: aluminium chromium slag 80% ~ 90%, electrofused mullite 10% ~ 20%, and above-mentioned aluminium chromium slag is containing Al
2o
3mass percent 65 ~ 75%; Containing Cr
2o
3mass percent 5 ~ 15%; Above-mentioned electrofused mullite is containing 3Al
2o
32SiO
2mass percent 80 ~ 90%.
Preparation technology comprises the following steps:
A. starting material and processing, gets industrial aluminum chromium slag and electrofused mullite, aluminium chromium slag and electrofused mullite is carried out respectively pulverizing and fine grinding, and the granularity of pulverizing and fine grinding is below 3mm;
B. magnetic separation process, carries out magnetic separation process by the aluminium chromium slag after pulverizing and fine grinding, removes ferromagnetic material wherein;
C. sieve, screen the granularities at different levels of aluminium chromium slag and the electrofused mullite separated, partition size is respectively 5-3mm; 3-1mm; 1-0mm; 200 orders and 350 orders;
D. mix, by mass percent 80% ~ 90%, granularity is 5mm-350 object aluminium chromium slag and mass percent 5% ~ 15%, and granularity is the mixing of 5mm-200 object electrofused mullite, add the spent pulping liquor bonding agent of material total amount mass percent 5% ~ 10% again, stir;
E. shaping and goods, are pressed into the base substrate of different shape by the above-mentioned material mixed, burn till through 1300 DEG C of-1600 DEG C of high temperature, are incubated and become goods in 12-18 hour.
3. its preparation technology of nonferrous metallurgy refractory materials according to claim 2, it is characterized in that in steps d, getting the aluminium chromium slag that mass percent is 92%, the mass percent of the granularities at different levels of aluminium chromium slag is: 5-3mm30%, 3-1mm10%, 1-0mm20%, 200 order 20%, 350 orders 13%, getting mass percent is 5% electrofused mullite, the granularity of electrofused mullite is 5-3mm, then adds the spent pulping liquor bonding agent that material total mass per-cent is 5%.
4. its preparation technology of nonferrous metallurgy refractory materials according to claim 2, is characterized in that adopting the friction press compression moulding being greater than 100MPa in step e.
The present invention is compared with existing refractory materials and production method thereof, and its significant beneficial effect is:
Feature of the present invention is coordinated aluminium chromium slag, electrofused mullite, and spent pulping liquor selected by bonding agent, produces nonferrous metallurgy refractory materials.Take full advantage of this industrial produced wastes of aluminium chromium slag.Aluminium chromium slag essential mineral is chromium corundum mutually, and the refractory materials main drawback made is that thermal shock resistance is poor.The present invention, for improving its thermal shock resistance, introduces second solid phase and mullite and suitable bonding agent.Because mullite is different from the thermal expansivity of chromium corundum, at high temperature contact site produces structural stress, and produce microcrack, the not obvious reduction intensity of this crackle, can rejected heat stress.Adopt in laboratory water quick cooling method to detect goods heat-shock resistance and bring up to 8 times by original 2 times.Thus improving the thermal shock resistance of material, production technique of the present invention is simple, and long product lifecycle, can meet Non-ferrous Metals Metallurgy Furnace And Kiln production requirement preferably.
Embodiment
The present invention is described in detail below by embodiment:
Embodiment 1
Will containing Al
2o
3mass percent is 65 ~ 75%, containing Cr
2o
3the aluminium chromium slag of mass percent 5 ~ 15%; Containing 3Al
2o
32SiO
2the electrofused mullite of mass percent 80 ~ 90% carries out pulverizing and fine grinding respectively, and the granularity of pulverizing and fine grinding is 5-0.05mm.Aluminium chromium slag is carried out magnetic separation process, removes ferromagnetic material wherein, the aluminium chromium ballast screen of pulverizing and fine grinding is divided, carries out size classification, be respectively 5-3mm, 3-1mm, 1-0mm, 200 orders, 350 orders; The electrofused mullite of pulverizing and fine grinding is sieved, carries out size classification, be respectively 5-3mm, 200 orders.Then, get the aluminium chromium slag that above-mentioned mass percent is 92%, the mass percent of the granularities at different levels of aluminium chromium slag is: 5-3mm35%, 3-1mm6%, 1-0mm18%, 200 order 20%, 325 orders 13%, getting above-mentioned mass percent is 8% electrofused mullite, the granularity of electrofused mullite is 5-3mm, add the spent pulping liquor bonding agent that material total mass per-cent is 3% again, above-mentioned material is carried out mix and blend.With friction press, make type at 200MPa pressure, burn till through 1500 DEG C of high temperature, be incubated and become goods in 12 hours, form nonferrous metallurgy refractory materials.
Embodiment 2
To be 70 ~ 72% containing Al2O3 mass percent, be the aluminium chromium slag of 10 ~ 12% containing Cr2O3 mass percent; Containing 3Al
2o
32SiO
2mass percent be 80 ~ 90% electrofused mullite carry out pulverizing fine grinding respectively, to pulverize and the granularity of fine grinding is 5-0.05mm.Aluminium chromium slag is carried out magnetic separation process, removes ferromagnetic material wherein, the aluminium chromium ballast screen of pulverizing and fine grinding is divided, carries out size classification, be respectively 5-3mm, 3-1mm, 1-0mm, 200 orders, 350 orders; The electrofused mullite of pulverizing and fine grinding is sieved, carries out size classification, be respectively 5-3mm, 200 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: 5-3mm35%, 3-1mm6%, 1-0mm18%, 200 order 15%, 350 orders 13%, get above-mentioned electrofused mullite, wherein the mass percent of 5-3mm is 8%, 200 object mass percents is 5%, adding material total mass per-cent is again 5% spent pulping liquor bonding agent, and above-mentioned material is carried out mix and blend.With friction press, carry out shaping under 200MPa pressure, burn till through 1500 DEG C of high temperature, be incubated and become goods in 12 hours.Form nonferrous metallurgy refractory materials.
Embodiment 3
To be 70 ~ 72% containing Al2O3 mass percent, be the aluminium chromium slag of 10 ~ 12% containing Cr2O3 mass percent; The electrofused mullite being 80 ~ 90% containing 3Al2O32SiO2 mass percent carries out pulverizing fine grinding respectively, and the granularity of pulverizing and fine grinding is 5-0.05mm.Aluminium chromium slag is carried out magnetic separation process, removes ferromagnetic material wherein, the aluminium chromium ballast screen of pulverizing and fine grinding is divided, carries out size classification, be respectively 5-3mm, 3-1mm, 1-0mm, 200 orders, 350 orders; The electrofused mullite of pulverizing and fine grinding is sieved, carries out size classification, be respectively 5-3mm, 200 orders.Then, get the aluminium chromium slag that above-mentioned mass percent is 95%, the granularity mass percents at different levels of aluminium chromium slag are: 5-3mm43%, 3-1mm6%, 1-0mm18%, 200 order 15%, 350 orders 13%, getting above-mentioned 200 order electrofused mullite mass percents is 5%, adding material total mass per-cent is again 5% spent pulping liquor bonding agent, and above-mentioned material is carried out mix and blend.With friction press, carry out shaping under 200MPa pressure, burn till through 1500 DEG C of high temperature, be incubated and become goods in 12 hours, form nonferrous metallurgy refractory materials.
Claims (4)
1. nonferrous metallurgy refractory materials and a preparation technology thereof, is characterized in that this refractory quality percent composition content is as follows: aluminium chromium slag 80% ~ 90%, electrofused mullite 10% ~ 20%, and above-mentioned aluminium chromium slag is containing Al
2o
3mass percent 65 ~ 75%; Containing Cr
2o
3mass percent 5 ~ 15%; Above-mentioned electrofused mullite is containing 3Al
2o
32SiO
2mass percent 80 ~ 90%.
2. its preparation technology of nonferrous metallurgy refractory materials according to claim 1, is characterized in that the method comprises the following steps:
A. starting material and processing, gets industrial aluminum chromium slag and electrofused mullite, aluminium chromium slag and electrofused mullite is carried out respectively pulverizing and fine grinding, and the granularity of pulverizing and fine grinding is below 3mm;
B. magnetic separation process, carries out magnetic separation process by the aluminium chromium slag after pulverizing and fine grinding, removes ferromagnetic material wherein;
C. sieve, screen the granularities at different levels of aluminium chromium slag and the electrofused mullite separated, partition size is respectively 5-3mm; 3-1mm; 1-0mm; 200 orders and 350 orders;
D. mix, by mass percent 80% ~ 90%, granularity is 5mm-350 object aluminium chromium slag and mass percent 5% ~ 15%, and granularity is the mixing of 5mm-200 object electrofused mullite, add the spent pulping liquor bonding agent of material total amount mass percent 5% ~ 10% again, stir;
E. shaping and goods, are pressed into the base substrate of different shape by the above-mentioned material mixed, burn till through 1300 DEG C of-1600 DEG C of high temperature, are incubated and become goods in 12-18 hour.
3. its preparation technology of nonferrous metallurgy refractory materials according to claim 2, it is characterized in that in steps d, getting the aluminium chromium slag that mass percent is 92%, the mass percent of the granularities at different levels of aluminium chromium slag is: 5-3mm30%, 3-1mm10%, 1-0mm20%, 200 order 20%, 350 orders 13%, getting mass percent is 5% electrofused mullite, the granularity of electrofused mullite is 5-3mm, then adds the spent pulping liquor bonding agent that material total mass per-cent is 5%.
4. its preparation technology of nonferrous metallurgy refractory materials according to claim 2, is characterized in that adopting the friction press compression moulding being greater than 100MPa in step e.
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| CN201410411747.6A CN105418080A (en) | 2014-08-21 | 2014-08-21 | Non-ferrous metallurgy fireproof material and preparation process thereof |
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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 |
| CN110550960A (en) * | 2019-08-30 | 2019-12-10 | 锦州集信高温材料有限公司 | Method for producing zinc smelting kiln lining brick by smelting chromium slag |
-
2014
- 2014-08-21 CN CN201410411747.6A patent/CN105418080A/en active Pending
Cited By (5)
| 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 |
| CN110550960A (en) * | 2019-08-30 | 2019-12-10 | 锦州集信高温材料有限公司 | Method for producing zinc smelting kiln lining brick by smelting chromium slag |
| CN110550960B (en) * | 2019-08-30 | 2022-06-28 | 锦州集信高温材料有限公司 | Method for producing zinc smelting kiln lining brick by smelting chromium slag |
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