CN103880440A - Preparation method for microporous high-strength sintered refractory aggregate - Google Patents
Preparation method for microporous high-strength sintered refractory aggregate Download PDFInfo
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- CN103880440A CN103880440A CN201410056179.2A CN201410056179A CN103880440A CN 103880440 A CN103880440 A CN 103880440A CN 201410056179 A CN201410056179 A CN 201410056179A CN 103880440 A CN103880440 A CN 103880440A
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Abstract
The invention relates to a preparation method for a microporous high-strength sintered refractory aggregate. According to the technical scheme, the preparation method comprises the steps: by taking one or more of industrial product oxides or natural minerals as raw materials, adding one of or any combination of oxides or fluorides, chlorides or nitrates, or sulfates and the like as a mineralizing agent; introducing one or any combination of chips, lignin, carbon black, asphalt, graphite, coal, coke and charcoal as a swelling agent, proportioning, and grinding by adopting a dry method, carrying out air-separation and classification to obtain powder, pelletizing in a pelletizing machine, drying and quick firing in a shaft kiln or a rotary kiln, and crushing to obtain the refractory aggregate. The crystal structure of the microporous high-strength sintered refractory aggregate prepared by adopting method has a great amount of closed micropores evenly distributed in crystals, the open porosity is low, and the product is low in volume density and thermal conductivity (good in thermal insulation property), strong in anti-scouring and corrosion-resistant properties, and excellent in other properties.
Description
Technical field
The invention belongs to sintered refractory technical field.Be specifically related to the preparation method of the high-strength sintering refractory aggregate of a kind of micropore.
Background technology
The technical progress of refractory materials and the development of hot industry interdepends, mutually promote, refractory materials has been not only consumptive material for modern high-temperature technology, and is to realize the necessary functional type material of high temperature new technology.In short supply, energy-saving and cost-reducing, direction that low-carbon environment-friendly has become each area research along with global resources and the energy, therefore, proposed to upgrade higher requirement to the function of heat insulation of refractory materials.In refractory materials, approximately 70% for smelting iron and steel, but compared with international most advanced level, China's smelting iron and steel ton steel energy consumption exceeds 20-40%, and ton steel refractory consumption rate gap compared with World Developed Countries is larger.
In steel smelting procedure, ladle is the visual plant of storage, transportation and refined molten steel, and many new steel grades all complete in ladle.Its refractory materials and molten steel are long duration of contact, and temperature is high, are one of main sources of foreign substance in molten steel.Therefore, refractory materials heat-insulating property, will directly affect the insulation of liquid steel temperature in tapping and ladle, thereby the quality of the finished product is impacted.Therefore, use high-strength its thermal conductivity of sintering refractory aggregate of micropore low, intensity is high, and the insulation while being conducive to liquid steel refining reduces calorific loss.
Need equally the high-strength refractory materials of light thermal-insulation at the working face of pressure vessels for the chemical industry, industrial furnace.Because the insulation effect of traditional light thermal-shield refractory material is good, but anti-erosion resistance to erosion ability and intensity and wear resistance are all poor, conventionally can not directly be used as working face, but as thermal insulation layer or permanent layer, use temperature is low, is difficult to meet the demand under high temperature; On product form, light heat-insulating material is take molded article as main, along with current amorphous refractory has become the main flow that hot industry develops, compared with the developed countries such as Japan, the U.S., the very large development space of amorphous refractory reduction of China, due to the coherent gross blow hole of light material existence at present, be difficult to prepare high-intensity refractory aggregate, can not meet the manufacturing technique requirent of sizing or amorphous refractory, therefore restricted the development of lightweight refractory.
In sum, study light microporous high-strength sintering refractory aggregate, to meeting high-temperature field refractory materials growth requirement, there is good pushing effect.The premium propertiess such as the refractory materials that adopts micropore high-strength sintering refractory aggregate to prepare has that thermal conductivity is low, intensity is high, high temperature resistant, anti-erosion, can directly apply to the working lining in the high temperature such as pressure vessels for the chemical industry, Industrial Stoves place.
Summary of the invention
Task of the present invention aims to provide one, and to have apparent porosity similar with ordinary sinter material, but volume density is relatively little, and thermal conductivity is lower, intensity is close with compact refractory material with use properties, in crystal, forms and be uniformly distributed high-strength sintering refractory aggregate of micropore of small pore and preparation method thereof.
For realizing above-mentioned task, the technical solution adopted in the present invention is: the raw material of the high-strength sintering refractory aggregate of this micropore is take one or more industrial goods oxide compounds of particle diameter < 10mm or natural mineral as raw material; Add a kind of in the oxide compound of 0 ~ 5 wt% or fluorochemical or muriate or nitrate or vitriol etc. or arbitrary combination wherein as mineralizer; And it is additional to introduce 1 ~ 15 wt%() wood chip, lignin, carbon black, pitch, graphite, coal, coke, charcoal ... Deng in a kind of or arbitrary combination wherein as pore forming agent.Raw material according to a certain ratio, mineralizer, pore forming agent are pre-mixed, dry method grinding altogether in interval type or continuous type ball mill, select classification to obtain mixing the qualified powder of fineness meso-position radius at 0.5 ~ 8um by 1 ~ strong breeze, balling-up in horizontal or disc type nodulizer again, after oven dry, under 1600-1950 ℃ of condition, in shaft furnace or rotary kiln, burn till fast, after fragmentation, can obtain the high-strength sintering refractory aggregate of micropore.
Former abrasive lapping adopts gap or continuous type ball mill to be conducive to realize the large production of continuous industryization, and this mill output is large, can in time qualified fine powder be discharged, and reduces crushing phenomenon, and product granularity is even simultaneously, and product fineness is adjustable.Go out abrasive dust material through 1 ~ 5 series-parallel connection pneumatic separator, guarantee that granularity is qualified evenly, multimodal particle diameter composition is conducive to the raising of balling-up green density.
Balling-up in horizontal or disc type nodulizer, ball base size is 15 ~ 35mm, then in shaft furnace or rotary kiln, burns till fast under 1600 ~ 1950 ℃ of conditions, burns after product and after fragmentation, can obtain micropore light weight corundum refractory aggregate.
In technique scheme: its particle diameter of industrial goods oxide compound or natural mineral < 10mm; The oxide compound of mineralizer used or fluorochemical or muriate or nitrate or vitriol etc. are technical pure, content ﹥ 99%, its particle diameter ﹤ 0.01mm; Pore forming agent wood chip, lignin, carbon black, pitch, graphite, coal, coke, charcoal ..., its dry basis ash content < 2%, particle diameter < 0.01mm; Raw material is according to a certain ratio continuous grinding in gap or continuous type ball mill, select classification to obtain mixing the qualified powder of fineness meso-position radius at 0.5-8um by 1 ~ strong breeze, balling-up in horizontal or disc type nodulizer again, after oven dry, under 1600-1950 ℃ of condition, in shaft furnace or rotary kiln, burn till fast, after fragmentation, can obtain the high-strength sintering orthopaedics of micropore.
Owing to adopting technique scheme, on the one hand, through gap or continuous type ball mill superfine pulverizing, guaranteed the even mixing of material take industrial goods oxide compound or natural mineral as raw material, in improving fineness of materials, increase the specific surface area of microparticle, thereby improved material reaction activity.Because subparticle is subject to the thunderbolt effect of mill ball in the time grinding, its surface can increase, lattice imperfection increases, reactive behavior is higher, the raising of crystal boundary velocity of diffusion while being conducive to high temperature, and micro-pore is easily wrapped up by crystal, and formation sealed porosity.As add necessary mineralizer, and be more conducive to the raising of crystal boundary velocity of diffusion, increase the quantity of sealed porosity.Due to the introducing of mineralizer, when sintering, can effectively reduce the sintering temperature of material, in the time of high temperature sintering, there is removing impurities effect simultaneously, form the salt of volatile loss, there is the effect of refined product quality.Therefore the difficulty, reduction burnup and the production cost that burn till operation to reducing are all favourable; And the easy burning lost articles such as wood chip, lignin, carbon black, pitch, graphite, coal, coke, charcoal are as the introducing of pore forming agent, improve the quantity of micro-pore in product, increase crystals and form the probability of sealed porosity, thereby form the small pore of desirable sealing.
We select to adopt the horizontal of semidry process or disc type nodulizer the moulding of ball base, take a small amount of water or add micro-content organism as bonding agent, ball base water content is 5 ~ 25%, with respect to wet method fine grinding and oven dry (mud moisture is 45 ~ 80%), save greatly burnup, simultaneously owing to adopting multimodal powder material, make ball base finer and close, reduce the formation of gross blow hole (apparent pore), between crystallite, more pressed close to each other, be conducive to the growth of crystal and the increase of sealed porosity.
Utilize shaft furnace or rotary kiln to burn till, it is shorter that material burns till the residence time in shaft furnace or rotary kiln, and pore can not get fully getting rid of and is enclosed in material.Because the synergy of above-mentioned three aspects:, finally obtains the high-strength sintered aggregate of micropore.Prepared high-strength its volume density of sintering refractory aggregate of micropore of the present invention is between 70 ~ 95% of ordinary sinter aggregate, and open pore content is 2 ~ 6%, and closed pore content is 5 ~ 35%, and mean pore size is 0.5 ~ 5 μ m.
Therefore, the prepared high-strength sintering refractory aggregate of micropore of this method has that apparent porosity is low, body close low, thermal conductivity is low, antiscour and the feature such as corrosion-resistant property is strong, it is the novel material that substitutes ordinary sinter aggregate, obviously energy-saving and cost-reducing, meet national industrial policies, there is good application prospect and social effect.
Embodiment
Below in conjunction with embodiment, the invention will be further described, not the restriction to protection domain:
For avoiding repetition, first raw material related this embodiment and processing parameter unification are described below, in embodiment, no longer repeat: raw materials used is one or more industrial goods oxide compound or natural mineral with particle diameter < 10mm; Add a kind of in the oxide compound of 0 ~ 5 wt% or fluorochemical or muriate or nitrate or vitriol etc. or arbitrary combination wherein as mineralizer; And it is additional to introduce 1 ~ 15 wt%() wood chip, lignin, carbon black, pitch, graphite, coal, coke, charcoal ... Deng in a kind of or arbitrary combination wherein as pore forming agent.Raw material according to a certain ratio, mineralizer, pore forming agent are pre-mixed, dry method grinding altogether in interval type or continuous type ball mill, select classification to obtain mixing the qualified powder of fineness meso-position radius at 0.5-8um by 1 ~ strong breeze, balling-up in horizontal or disc type nodulizer again, after oven dry, under 1600-1950 ℃ of condition, in shaft furnace or rotary kiln, burn till fast, after fragmentation, can obtain the high-strength sintering refractory aggregate of micropore.
embodiment 1
High-strength alundum refractory aggregate of a kind of micropore and preparation method thereof.Raw material and the quality percentage composition of this micropore light weight corundum refractory aggregate are: 90 ~ 100wt% commercial alumina fine powder, 0 ~ 5wt% industrial aluminium hydroxide fine powder, 0.01 ~ 1wt% aluminum fluoride, 1 ~ 5 wt% wood chip;
Dry method grinding in the ball mill of gap, balling-up in horizontal nodulizer, ball base size is 25-30mm, then under 1800 ~ 1950 ℃ of conditions, in shaft furnace, burn till fast cooling fast, burn after product after fragmentation, can obtain the high-strength alundum refractory aggregate of micropore.
Its volume density of the prepared micropore light weight of the present embodiment 1 corundum refractory aggregate is between 3.0 ~ 3.2g/cm
3, apparent porosity is 3 ~ 4%, sealed porosity mean pore size is 2 ~ 3 μ m.
embodiment 2
High-strength fused mullite refractory aggregate of a kind of micropore and preparation method thereof.Raw material and the quality percentage composition of the high-strength fused mullite refractory aggregate of this micropore are: 45 ~ 55wt% commercial alumina fine powder, 45 ~ 55wt% sintering kaolin fine powder, 5 ~ 15 wt% charcoals;
Dry method grinding in circle stream mill, balling-up in dribbling balling machine, ball base size is 25-30mm, then under 1800 ~ 1950 ℃ of conditions, in shaft furnace, burns till fast coolingly fast, burning after product can obtain the high-strength fused mullite refractory aggregate of micropore after fragmentation.
High-strength its volume density of fused mullite refractory aggregate of the prepared micropore of the present embodiment 2 is between 2.3 ~ 2.5g/cm
3, apparent porosity is 2 ~ 4%, sealed porosity mean pore size is 1 ~ 2 μ m.
embodiment 3
The high-strength sintering fireproof magnesia alumina spinel of a kind of micropore aggregate and preparation method thereof.Raw material and the quality percentage composition of the high-strength sintering fireproof magnesia alumina spinel of this micropore aggregate are: 60 ~ 80wt% commercial alumina fine powder, 20 ~ 40wt% sintering oxidation magnesium powder, 0.1 ~ 2wt% magnesium chloride, 1 ~ 10wt% lignin;
Dry method continuous grinding in circle stream mill, balling-up in horizontal nodulizer, ball base size is 25-30mm, then in rotary kiln, burns till fast under 1800 ~ 1950 ℃ of conditions, burns after product and after fragmentation, can obtain the high-strength sintering fireproof magnesia alumina spinel of micropore aggregate.
Its volume density of the high-strength sintering fireproof magnesia alumina spinel of the prepared micropore of the present embodiment 3 aggregate is between 2.5 ~ 2.8g/cm
3, apparent porosity is 3 ~ 5%, closed porosity mean pore size is 0.5 ~ 2 μ m.
embodiment 4
Natural mullite refractory aggregate of a kind of high-strength sintering of micropore and preparation method thereof.Raw material and the quality percentage composition of the natural mullite refractory aggregate of the high-strength sintering of this micropore are: the natural alumina fine powder of 90 ~ 100wt%, 0 ~ 10wt% kyanite fine powder, 8 ~ 15wt% coal;
Dry method continuous grinding in circle stream mill, balling-up in dribbling balling machine, ball base size is 20-30mm, then in shaft furnace, burns till fast under 1600 ~ 1800 ℃ of conditions, burns after product and after fragmentation, can obtain micropore light weight corundum refractory aggregate.
Its volume density of the natural mullite refractory aggregate of the high-strength sintering of the prepared micropore of the present embodiment 4 is between 2.0 ~ 2.3g/cm
3, apparent porosity is 5 ~ 6%, sealed porosity mean pore size is 1 ~ 5 μ m.
Claims (3)
1. a preparation method for the high-strength sintering refractory aggregate of micropore, is characterized in that, the raw material of preparing the high-strength sintering refractory aggregate of this micropore is: take one or more industrial goods oxide compounds of particle diameter < 10mm or natural mineral as raw material; Add a kind of in oxide compound or fluorochemical or muriate or nitrate or vitriol or arbitrary combination wherein as mineralizer; And introduce a kind of in wood chip, lignin, carbon black, pitch, graphite, coal, coke, charcoal or arbitrary combination wherein as pore forming agent; Be pre-mixed by the raw material of proportioning, mineralizer, pore forming agent, dry method grinding altogether in interval type or continuous type ball mill, select classification to obtain mixing the qualified powder of fineness meso-position radius at 0.5-8um by 1 ~ strong breeze, balling-up in nodulizer again, after oven dry, burn till fast, after fragmentation, can obtain the high-strength sintering refractory aggregate of micropore.
2. the preparation method of the high-strength sintering refractory aggregate of micropore according to claim 1, is characterized in that the described semidrying that is shaped to, and nodulizer is horizontal, the one in disc type nodulizer, and ball base size is 15-35mm.
3. the preparation method of the high-strength sintering refractory aggregate of micropore according to claim 1, is characterized in that described calcination equipment is shaft furnace or rotary kiln, and firing temperature is 1600 ~ 1950 ℃.
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| CN201410056179.2A CN103880440A (en) | 2014-02-19 | 2014-02-19 | Preparation method for microporous high-strength sintered refractory aggregate |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105777155A (en) * | 2014-09-02 | 2016-07-20 | 吴雪健 | Preparation method of drossing equipment refractory aggregate |
| CN105819841A (en) * | 2014-09-02 | 2016-08-03 | 吴雪健 | Fireproof aggregate used for making skimming devices |
| CN106631102A (en) * | 2016-12-30 | 2017-05-10 | 武汉科技大学 | Nanometer pore light-weight corundum refractory aggregate and preparation method thereof |
| CN107488049A (en) * | 2017-08-21 | 2017-12-19 | 李楠 | A kind of Al2O3‑SiO2The spherical lightweight refracrory aggregate of matter |
| CN113121259A (en) * | 2021-03-17 | 2021-07-16 | 宜兴摩根热陶瓷有限公司 | Light heat-insulating refractory material and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102584289A (en) * | 2012-02-08 | 2012-07-18 | 武汉科技大学 | Mullite lightweight aggregate and preparation method thereof |
| CN103145428A (en) * | 2013-02-23 | 2013-06-12 | 江苏晶鑫高温材料有限公司 | Preparation method for microporous light-weight corundum fireproof aggregate |
-
2014
- 2014-02-19 CN CN201410056179.2A patent/CN103880440A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102584289A (en) * | 2012-02-08 | 2012-07-18 | 武汉科技大学 | Mullite lightweight aggregate and preparation method thereof |
| CN103145428A (en) * | 2013-02-23 | 2013-06-12 | 江苏晶鑫高温材料有限公司 | Preparation method for microporous light-weight corundum fireproof aggregate |
Non-Patent Citations (2)
| Title |
|---|
| 李文旭 等: "《陶瓷添加剂——配方·性能·应用》", 31 January 2011, 化学工业出版社 * |
| 王捷: "《氧化铝生产工艺》", 30 June 2006, 冶金工业出版社 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105777155A (en) * | 2014-09-02 | 2016-07-20 | 吴雪健 | Preparation method of drossing equipment refractory aggregate |
| CN105819841A (en) * | 2014-09-02 | 2016-08-03 | 吴雪健 | Fireproof aggregate used for making skimming devices |
| CN105819841B (en) * | 2014-09-02 | 2019-03-29 | 马鞍山华盛冶金科技发展有限公司 | A kind of refractory aggregate being used to prepare skimming equipment |
| CN105777155B (en) * | 2014-09-02 | 2019-05-03 | 马鞍山华盛冶金科技发展有限公司 | A kind of preparation method of skimming equipment refractory aggregate |
| CN106631102A (en) * | 2016-12-30 | 2017-05-10 | 武汉科技大学 | Nanometer pore light-weight corundum refractory aggregate and preparation method thereof |
| WO2018121292A1 (en) * | 2016-12-30 | 2018-07-05 | 武汉科技大学 | Nanoporous light-weight corundum refractory aggregate and preparation method therefor |
| CN106631102B (en) * | 2016-12-30 | 2019-08-20 | 武汉科技大学 | A kind of nano-pore light-weight corundum fireproof aggregate and preparation method thereof |
| CN107488049A (en) * | 2017-08-21 | 2017-12-19 | 李楠 | A kind of Al2O3‑SiO2The spherical lightweight refracrory aggregate of matter |
| CN113121259A (en) * | 2021-03-17 | 2021-07-16 | 宜兴摩根热陶瓷有限公司 | Light heat-insulating refractory material and preparation method thereof |
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Application publication date: 20140625 |