CN104496504A - Sialon-bonded magnesium aluminate spinel refractory material for rotary cement kiln and preparation method - Google Patents
Sialon-bonded magnesium aluminate spinel refractory material for rotary cement kiln and preparation method Download PDFInfo
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- CN104496504A CN104496504A CN201510004808.1A CN201510004808A CN104496504A CN 104496504 A CN104496504 A CN 104496504A CN 201510004808 A CN201510004808 A CN 201510004808A CN 104496504 A CN104496504 A CN 104496504A
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Abstract
The invention relates to a sialon-bonded magnesium aluminate spinel refractory material for a rotary cement kiln and a preparation method and belongs to the field of refractory materials. The chemical formula of utilized sialon is Si(6-Z)AlZOZN(8-Z), wherein Z is equal to 1. The sialon-bonded magnesium aluminate spinel refractory material comprises the following raw materials: high-purity magnesia, alumina micropowder, silicon nitride and metal aluminum powder, and phenolic resin serves as a bonding agent. The preparation method comprises the steps of weighing the raw materials according to the proportion during production, mixing to obtain pug, carrying out compression molding, drying at 80-200 DEG C for 24-36 hours, and carrying out nitriding and sintering at 1200-1500 DEG C. According to the preparation method, by utilizing a sialon-bonded phase generated by a reaction based on the in situ synthesis of magnesium aluminate spinel, the refractory material has the following excellent physical property indexes: the apparent porosity is 12%-18%, the volume density is 2.80g/cm<3>-3.20g/cm<3>, the normal temperature compression strength is 110MPa-240MPa, and the refractoriness under load (0.2MPa*0.6%) is more than or equal to 1680 DEG C; meanwhile, the refractory material has good thermal shock resistance, excellent wear resistance, erosion resistance and structural flexibility, great market potential and good social benefit and is applicable to a transitional zone of the rotary cement kiln at a severe environment.
Description
Technical field
The present invention relates to a kind of cement rotary kiln transition belt refractory materials of preparation, particularly relate to a kind of cement rotary kiln transition belt match grand (Z=1) in conjunction with fireproof magnesia alumina spinel material and preparation method.
Background technology
Along with the increase day by day of day by day the improving of cement kiln production technique and mechanical property, output, refractory materials is required also more and more harsher.Current new type nonaqueous cement rotary kiln raises due to kiln temperature; Kiln speed is accelerated, and unit output increases; Kiln footpath is strengthened; The components such as alkali, sulphur, chlorine corrode serious, the composition volatilization cohesion iterative cycles such as the vitriol of alkali and muriate; System complex in kiln, a series of reasons such as operation factor is low, transition band of cement kiln refractory materials should be met the following conditions: (1) is in the process of cement burning, temperature variation is very large, the temperature of transitional zone reaches as high as 1650 DEG C, require that refractory materials can be high temperature resistant, have high refractoriness, have higher thermal shock resistance simultaneously.(2) in the process of cement burning, the weight of cement kiln and material and rotation make refractory materials bear very large load, simultaneously because transitional zone temperature fluctuation is larger, be difficult to form stable kliner coating, cause the air-flow of temperature flowing and material constantly to cause refractory liner directly to wash away, wear and tear, require that refractory materials has higher intensity, wear resisting property will be got well simultaneously, damages with resistance to mechanical effect.(3) at high temperature material, fuel and brick precursor reactant generate silicate, wustite and alkali salt cause the chemical erosion to refractory materials, the continuous change of kiln internal oxidition-reducing atmosphere causes brick laying structure constantly to loosen, cause above-mentioned salt to infiltrate to increase the weight of, the infringement of brick body is also strengthened further, requires that refractory materials has corresponding chemical resistance of concrete performance.(4) rotating speed of traditional kiln generally has 60 ~ 70rph, novel PC dry method kiln often reaches 180 ~ 210rph, kiln height rotating speed, major diameter and high-temperature, the synthetical destruction effect of the thermal stresses that refractory materials in kiln is born, mechanical stress and chemical erosion is more much bigger than conventional cement kiln.This require kiln lining cold conditions and hot under rotation in all keep enough strength and stabilities.
Periclasite-Mg-Al spinel brick obtains good popularization with the high-temperature behavior that its good wear resisting property, higher heat-shock resistance etc. are excellent in transition band of cement kiln.But periclasite-Mg-Al spinel brick also exists the shortcoming that cannot overcome: (1) thermal conductivity is large, thus easily causes kiln temperature too high and make kiln cylinder body rigidity reduce, there is ovalizing deflection, high-density weighting material mechanical stress.(2) poor solidity to corrosion, the spinel components of magnesia-spinel brick reacts with CS or CA in cement clinker the C generating low melting point upon an over-temperature condition
12a
7, the viscosity of liquation is also low, and cause kliner coating to burn stream, cause deteriorating of spinel mineral, work-ing life is short, and above deficiency limits it in thermal zone use.
Sialon material at high temperature has good chemical stability and mechanical property, thermal expansivity is little, heat-shock resistance, resistance to fouling and resistance of oxidation are strong, are the ideal materials of refractory materials, sealing-ring, bearing, valve body, are also widely used in cutting tool.At present, the silicon carbide articles that Sai Long combines is for various inner lining of kiln and high-temperature components, in particular for the liner between blast-furnace bosh and restoration of lower stack, demonstrate larger superiority, the corundum material that Sai Long combines also for blast furnace ceramic cup and air brick of steel ladle, but is matched and grandly be yet there are no report in conjunction with fireproof magnesia alumina spinel material.
The present invention utilizes fabricated in situ magnesium-aluminium spinel, give the wear resistance of material high, ductility is good, intensity advantages of higher, material is promoted moulding by metallic aluminium powder, reduce sintering temperature, promote the nitrogenize of aluminium, form wild phase AlN, match grand (Z=1) is prepared in conjunction with fireproof magnesia alumina spinel material by the silicon nitride added, belong to metal-non-oxidized substance-oxide complex system, this system can not only utilize respective advantage well, and material property can also be made to be optimized and to strengthen.In oxide matrix, introduce non-oxidized substance, non-oxide particles will be interspersed in the skeleton of oxide particle formation.Produce dispersion-strengthened and toughening effect, this is conducive to the raising of material intensity at each temperature, also improves the heat-shock resistance of material; In non-oxidized substance matrix, introduce oxide compound, the gap of the braided structure that disperse forms in non-oxide particles by oxide particle, material at high temperature intensity improves, and heat-shock resistance improves further, is the quality refractory goods of applicable transition band of cement kiln.
Summary of the invention
The kiln lining that the object of the invention is metal-non-oxidized substance-oxide complex series refractory material theory to refer to cement kiln uses, utilize match grand (Z=1) in conjunction with magnesium-aluminium spinel prepare a kind of there is high strength, excellent heat-shock resistance, wear resistance is strong, impermeabilisation aggressiveness is good, have certain moulding and toughness simultaneously, can meet the novel refractory of transition band of cement kiln.
Technical scheme of the present invention:
The invention provides the match of a kind of transition band of cement kiln grand in conjunction with alundum refractory materials, the grand chemical general formula of the match adopted is Si
(6-Z)al
zo
zn
(8-Z), wherein Z=1; By mass percentage, raw material consists of: the highly-purity magnesite of 60-75%, the alumina powder of 3-15%, the silicon nitride of 1-25%, the metallic aluminium powder of 1-8%, and the resol of additional above-mentioned raw materials total amount 1-5% is bonding agent.
Described highly-purity magnesite is 3-1mm, 1-0mm, < 0.088mm tri-kinds of granularities, and the granularity of alumina powder, silicon nitride and metallic aluminium powder is 325 orders.
Above-mentioned cement rotary kiln transition belt match is grand in conjunction with fireproof magnesia alumina spinel material preparation method, it is characterized in that: weigh various raw material by proportioning, fine powder is carried out premix, then be added in the particulate material fully mixed with resol, pug is obtained through mixing, then extrusion forming, dry 24-36h at 80 DEG C-200 DEG C, dried adobe is put into combustion gas muffle nitrogenize shuttle kiln in 1200-1500 DEG C of Nitride firing, final obtained cement rotary kiln transition belt match is grand in conjunction with fireproof magnesia alumina spinel material, is more suitable for cement rotary kiln transition belt and uses.
Feature of the present invention and positively effect:
1, the present invention is metal-non-oxidized substance-oxide complex system, and this system can not only utilize respective advantage well, makes material property be optimized simultaneously and strengthens.In oxide matrix, introduce non-oxidized substance, non-oxide particles will be interspersed in the skeleton that oxide particle forms, and produce dispersion-strengthened and toughening effect, and this, by being conducive to the raising of material intensity at each temperature, also improves the heat-shock resistance of material; In non-oxidized substance matrix, introduce oxide compound, the gap of the braided structure that disperse forms in non-oxide particles by oxide particle, material at high temperature intensity improves, and heat-shock resistance improves, and significantly improves the chemical stability of material.
2, the present invention introduces metallic aluminium powder, reduce sintering temperature, be conducive to matching grand formation, part metallic aluminium generation nitrogenizing reaction, the non-oxidized substance wild phase that in-situ preparation is a large amount of, there is the excellent high-temp plastic of performance in part metallic aluminium, makes goods have relatively high hot strength and excellent heat-shock resistance in the form of a film.
3, Sai Long is Si-Al-O-N sosoloid, and chemical general formula is Si
(6-Z)al
zo
zn
(8-Z), wherein Z value is between 0 ~ 4.2.What current research was more is all the sialon material of Z value between 2 ~ 3, seldom has to Z value the research of the material being 1.Prepared by the present invention is Z value be 1 the grand bond material of match, with the grand serial other materials of match, the sialon material of Z=1 has better wear resistance, higher intensity and heat-shock resistance, uses so the low sialon material of Z value is applicable cement rotary kiln.
4, it is Si-Al-O-N sosoloid mutually that the Sai Long (Z=1) that prepared by the present invention combines in conjunction with Sialon in fireproof magnesia alumina spinel material, therefore do not affect the grand acquisition in conjunction with alundum refractory materials of last match when feed composition slightly changes, be applicable to industrialization promotion.Sialon material at high temperature has good chemical stability and mechanical property, the advantages such as thermal expansivity is little, and heat-shock resistance, resistance to fouling and resistance of oxidation are strong simultaneously.
5, cement rotary kiln transition belt match grand (Z=1) that prepared by the present invention has excellent performance index in conjunction with fireproof magnesia alumina spinel material.Apparent porosity 12-18%, volume density 2.80-3.20g/cm
3, cold crushing strength 110-240MPa, refractoriness under load (0.2MPa × 0.6%)>=1680 DEG C, heat-shock resistance (1100 DEG C, water-cooled) is greater than 15 times, has excellent wear resistance, resistance to fouling and Structural flexibility.
6, to sum up, product of the present invention has high volume density and intensity, good heat-shock resistance, chemical resistance of concrete performance, excellent wear resistance, the applied environment that can to meet that transition band of cement kiln temperature fluctuation is comparatively large, atmosphere change is complicated, material washes away seriously, chemical erosion is harsh etc. severe, and the demand for development of product adaptation cement kiln refractory Trend of Chrome-free of the present invention, market potential is large, be suitable for applying, will good economic and social benefit be had.
Embodiment
Embodiment 1: a kind of transition band of cement kiln match grand (Z=1) is in conjunction with the preparation method of fireproof magnesia alumina spinel material, by mass percentage, raw material consists of: 45% granularity is the highly-purity magnesite of 3-1mm, 20% granularity is the highly-purity magnesite of 1-0mm, 8% granularity is the highly-purity magnesite of < 0.088mm, the metallic aluminium powder of 5%, the silicon nitride of 16%, the alumina powder of 6%, the resol of additional above-mentioned raw materials total amount 3.5%.
Described preparation method comprises the following steps:
A. weigh each raw material by described proportioning, pre-mixing fine powder in mixer, mixing time is 20-30min, and described powder part comprises metallic aluminium powder, silicon nitride, aluminum oxide differential.
B. the mixing base pug of edge runner-wet mill is adopted.Alundum particle at different levels is added in stone roller and is dry mixed 1-3min, then add the mixing 3-5min of load weighted resinoid bond, finally add remix 5-10min after pre-mixing fine powder.
C. the mixture obtained by step b is pressed into firebrick billet through 600t friction press.
D. firebrick billet is put into moisture eliminator 120 DEG C of dry 24h, control moisture content below 0.5%.
E. dried adobe is imported combustion gas muffle nitrogenize shuttle kiln, burn till in 1400 DEG C of nitrogen atmospheres, final obtained match is grand in conjunction with fireproof magnesia alumina spinel material.
The performance index of products obtained therefrom are: apparent porosity 15.3%, volume density 3.06g/cm
3, cold crushing strength 221MPa, refractoriness under load is greater than 1700 DEG C, and heat-shock resistance (1100 DEG C, water-cooled) 23 times, has excellent wear resistance, resistance to fouling and Structural flexibility.
Embodiment 2: production technique is identical with embodiment 1, and difference is:
By mass percentage, raw material consists of: 45% granularity is the highly-purity magnesite of 3-1mm, 20% granularity is the highly-purity magnesite of 1-0mm, 8% granularity is the highly-purity magnesite of < 0.088mm, the metallic aluminium powder of 3%, the silicon nitride of 21%, the alumina powder of 3%, the resol of additional above-mentioned raw materials total amount 3.5%.
The performance index of products obtained therefrom are: apparent porosity 17.8%, volume density 2.92g/cm
3, cold crushing strength 166MPa, refractoriness under load is greater than 1700 DEG C, and heat-shock resistance (1100 DEG C, water-cooled) 28 times, has excellent wear resistance, resistance to fouling and Structural flexibility.
Claims (3)
1. cement rotary kiln match is grand in conjunction with a fireproof magnesia alumina spinel material, it is characterized in that: the grand chemical general formula of the match adopted is Si
(6-Z)al
zo
zn
(8-Z), wherein Z=1; By mass percentage, raw material consists of: the highly-purity magnesite of 60-75%, the alumina powder of 3-15%, the silicon nitride of 5-25%, the metallic aluminium powder of 1-8%, and the resol of additional above-mentioned raw materials total amount 1-5% is bonding agent.
2. cement rotary kiln match according to claim 1 is grand in conjunction with fireproof magnesia alumina spinel material, it is characterized in that: described highly-purity magnesite is 3-1mm, 1-0mm, < 0.088mm tri-kinds of granularities, and the granularity of alumina powder, silicon nitride and metallic aluminium powder is 325 orders.
3. the grand preparation method in conjunction with fireproof magnesia alumina spinel material of cement rotary kiln match described in claim 1 or 2, it is characterized in that: weigh various raw material by proportioning, fine powder is carried out premix, then be added in the particulate material fully mixed with resol, pug is obtained through mixing, then extrusion forming, dry 24-36h at 80 DEG C-200 DEG C, dried adobe is put into combustion gas muffle nitrogenize shuttle kiln in 1200-1500 DEG C of Nitride firing, final obtained cement rotary kiln match is grand in conjunction with fireproof magnesia alumina spinel material, be more suitable for cement rotary kiln transition belt to use.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106588059A (en) * | 2016-12-29 | 2017-04-26 | 瑞泰科技股份有限公司 | Prefabricated member for lime rotary kiln and preparation method of prefabricated member |
| CN107793165A (en) * | 2017-12-02 | 2018-03-13 | 芜湖乾凯材料科技有限公司 | A kind of anti-erosion cement kiln clinkering zone refractory brick and preparation method thereof |
| CN111056833A (en) * | 2019-12-03 | 2020-04-24 | 宜兴市耐火材料有限公司 | Nitride-bonded spinel sliding plate and preparation process thereof |
| CN111138205A (en) * | 2020-02-18 | 2020-05-12 | 中钢洛耐新材料科技有限公司 | Anti-erosion sialon corundum product and preparation method thereof |
| CN111875398A (en) * | 2020-08-13 | 2020-11-03 | 中钢集团洛阳耐火材料研究院有限公司 | Nitride-silicon carbide-magnesia-alumina spinel complex phase refractory material product and preparation method thereof |
| CN112552027A (en) * | 2021-02-24 | 2021-03-26 | 北京利尔高温材料股份有限公司 | Carbon-free magnesium composite sealing brick for VOD steel ladle and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101066865A (en) * | 2007-06-14 | 2007-11-07 | 武汉科技大学 | Composite magnesia alumina spinel/Sialon ceramic material and its prepn process |
| CN101613214A (en) * | 2009-07-23 | 2009-12-30 | 北京通达耐火技术股份有限公司 | A kind of magnesia-hercynite brick used by high temperature zone of cement kiln and using method thereof |
| CN103880442A (en) * | 2014-02-20 | 2014-06-25 | 郑州市裕丰耐火材料有限公司 | Non-sintering sialon bonded corundum-spinel castable and method for preparing RH (Ruhstahl Hausen) insert tube prefabricated member inner core with same |
-
2015
- 2015-01-06 CN CN201510004808.1A patent/CN104496504B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101066865A (en) * | 2007-06-14 | 2007-11-07 | 武汉科技大学 | Composite magnesia alumina spinel/Sialon ceramic material and its prepn process |
| CN101613214A (en) * | 2009-07-23 | 2009-12-30 | 北京通达耐火技术股份有限公司 | A kind of magnesia-hercynite brick used by high temperature zone of cement kiln and using method thereof |
| CN103880442A (en) * | 2014-02-20 | 2014-06-25 | 郑州市裕丰耐火材料有限公司 | Non-sintering sialon bonded corundum-spinel castable and method for preparing RH (Ruhstahl Hausen) insert tube prefabricated member inner core with same |
Non-Patent Citations (1)
| Title |
|---|
| 师素环等: "大型干法水泥回转窑过渡带用镁铝尖晶石砖的损毁机理", 《耐火材料》, vol. 40, no. 6, 31 December 2006 (2006-12-31), pages 419 - 422 * |
Cited By (9)
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| CN106588059A (en) * | 2016-12-29 | 2017-04-26 | 瑞泰科技股份有限公司 | Prefabricated member for lime rotary kiln and preparation method of prefabricated member |
| CN106588059B (en) * | 2016-12-29 | 2020-05-12 | 瑞泰科技股份有限公司 | Prefabricated member for lime rotary kiln and preparation method thereof |
| CN107793165A (en) * | 2017-12-02 | 2018-03-13 | 芜湖乾凯材料科技有限公司 | A kind of anti-erosion cement kiln clinkering zone refractory brick and preparation method thereof |
| CN111056833A (en) * | 2019-12-03 | 2020-04-24 | 宜兴市耐火材料有限公司 | Nitride-bonded spinel sliding plate and preparation process thereof |
| CN111056833B (en) * | 2019-12-03 | 2022-07-05 | 宜兴市耐火材料有限公司 | Nitride-bonded spinel sliding plate and preparation process thereof |
| CN111138205A (en) * | 2020-02-18 | 2020-05-12 | 中钢洛耐新材料科技有限公司 | Anti-erosion sialon corundum product and preparation method thereof |
| CN111875398A (en) * | 2020-08-13 | 2020-11-03 | 中钢集团洛阳耐火材料研究院有限公司 | Nitride-silicon carbide-magnesia-alumina spinel complex phase refractory material product and preparation method thereof |
| CN111875398B (en) * | 2020-08-13 | 2022-02-15 | 中钢集团洛阳耐火材料研究院有限公司 | Nitride-silicon carbide-magnesia-alumina spinel complex phase refractory material product and preparation method thereof |
| CN112552027A (en) * | 2021-02-24 | 2021-03-26 | 北京利尔高温材料股份有限公司 | Carbon-free magnesium composite sealing brick for VOD steel ladle and preparation method thereof |
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