CN101597172B - Gradient high-alumina refractory raw material ball and production method thereof - Google Patents
Gradient high-alumina refractory raw material ball and production method thereof Download PDFInfo
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- CN101597172B CN101597172B CN200910065369XA CN200910065369A CN101597172B CN 101597172 B CN101597172 B CN 101597172B CN 200910065369X A CN200910065369X A CN 200910065369XA CN 200910065369 A CN200910065369 A CN 200910065369A CN 101597172 B CN101597172 B CN 101597172B
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Abstract
The invention discloses a gradient high-alumina refractory raw material ball and a production method thereof. The raw material comprises the following components in percentage by weight: high-alumina bauxite raw material with the content of A12O3 being more than or equal to 70% accounting for 30-65%, the high-alumina bauxite raw material with the content of A12O3 being more than or equal to 35% and being less than 55% or the coal gangue raw material with the content of A12O3 being more than or equal to 35% accounting for30-65% and the bonding agent accounting for 1-10%. The preparation method comprises the following steps: evenly mixing the high-alumina refractory raw material or the coal gangue raw material with the bonding agent, adding water and carrying out spray granulation to form an internal layer; and then adding the high-alumina bauxite raw material with the content of A12O3 being more than or equal to 70% and continually carrying out spray granulation to form an external layer; then drying and sintering. In the invention, the A12O3 of the surface layer of the ball is more than or equal to 80%, the A12O3 of the internal layer of the ball is more than or equal to 40%, the A12O3 content of the intermediate layer is gradient, the volume density is more than or equal to 2.55g/cm<3>, the water absorption is less than or equal to 5.0%. The refractory castable which uses the raw material ball as skeletal material has good flowability. The invention can make full use of the high-alumina bauxite gangue, muck and waste coal gangue, can lower cost, save energy and protect environment, thus being convenient for operation and promotion.
Description
One, technical field:
The present invention relates to a kind of inorganic non-metallic refractory materials, particularly relate to a kind of gradient high-alumina refractory raw material ball and working method thereof that is mainly used in the used aggregate of low cement deposit material of no slag corrosion environment use.
Two, background technology:
In recent years, China average year consumes about 100,000,000 tons in premium high-alumina alumina, and wherein aluminium industry is about 8,000 ten thousand tons, refractory materials about 1,500 ten thousand tons (containing electric smelting material, high-alumina cement etc.), pottery and other industrial about 5,000,000 tons.Used for refractory material bauxite raw material are general main to be to look its Al
2O
3The height of content comes fractionated, Al
2O
3＞74% is superfine, 70～74% be the I level, 62～70% be the II level, 53～62% be the III level, 44～53% be the IV level, 35～44% be the V level, the following ore deposit of IV level and IV level is regarded as rudimentary ore.
At present; Domestic fire-rated bauxitic clay ore mostly is ore hand sorting, small scale, and 20～30% broken ore or low grade ore abandoned are arranged in the exploitation, and resource utilization is very low; It shows: (1) domestic alumine calcining kiln can only burn the piece material greater than 5mm mostly, and muck does not utilize; (2) along with the variation of domestic and international market sales situation, superfine, supply falls short of demand for I level grog, III, IV level grog are unsalable, mine ubiquity " adopting richness abandons poor " phenomenon.According to statistics, superfine in the alumine geologic reserve of area, Yangquan, east, Shanxi, I level only accounts for 20.98% of total reserves, and the II level accounts for 52.49%; Qingzhen, Kweiyang Mai Gegao aluminium ore is superfine, the I level can account for 30.16% of total reserves, accounts for 63.26% below the II level.Under the situation superfine, that I level ore reserves is abundant, the ore utilization ratio below the II level is very low.In addition, ore has the mixed level of certain degree, causes calcining bauxite chamotte quality fluctuation, the ore deposit abandoned of the serious mixed level of part.According to statistics, 1 ton of qualified bauxite chamotte of every production roughly will consume 4～5 tons ore reserve, and the Mineral resources utilization ratio is merely 20～30%.
Through retrieval, the patent No. is that 98100364.8 patent discloses a kind of high strength refractory balls, and this refractory ball is mainly used in the pebble stove bottom, and the main raw material special grade bauxite accounts for 80～85%.The patent No. is that 03113433.5 patent discloses a kind of refractory castable component weight proportion: one-level alumina aggregate＜5mm65～70%; One-level alumina powder＜0.088mm 16～20%; Activated magnesia＜0.088mm 2～3%; Sintering one-level magnesia＜0.088mm5-6%, fine silica powder 5～6% adds polyphosphoric acid sodium salt 0.15～0.3%.It is thus clear that the main raw material of this refractory castable is one-level alumina aggregate and powder.
It is thus clear that, how in refractory materials, to make full use of more low-level ore, improve the utilization ratio of ore, turn waste into wealth, be an important topic that is worth solution.
Three, summary of the invention:
The technical problem that the present invention will solve: a kind of mine tailing that makes full use of bauxite mine or colliery Mineral resources is provided; The low cement deposit material of producing no slag corrosion environment use is with gradient high-alumina refractory raw material ball aggregate and working method thereof; This method can improve the utilization ratio of ore; Reduce production costs, help energy-conserving and environment-protective; Can improve simultaneously the thermal shock resistance of refractory castable.
Technical scheme of the present invention:
A kind of gradient high-alumina refractory raw material ball is represented with weight percentage, Al in the raw material
2O
3The alumine raw material of content>=70% account for 30～65%, 55%＞Al
2O
3The alumine raw material of content>=35% are or/and Al
2O
3The coal gangue raw material of content>=35% account for 30～65%, and wedding agent accounts for 1～10%.
Described gradient high-alumina refractory raw material ball, wherein Al
2O
3The alumine raw material of content>=70% account for 40～60%, 55%＞Al
2O
3The alumine raw material of content>=35% are or/and Al
2O
3The coal gangue raw material of content>=35% account for 35～55%, and wedding agent accounts for 2～5%.
Said Al
2O
3The alumine raw material granularity of content>=70% is less than 0.088mm, 55%＞Al
2O
3The alumine granularity of content>=35% is 0.044～0.2mm, and coal gangue raw material granularity is 0.044～0.2mm.
Said wedding agent is a kind of in water, dextrin, pulp powder and the calcium lignin sulphonate, perhaps two kinds, or two or more combinations.
A kind of working method of gradient high-alumina refractory raw material ball takes by weighing raw material earlier, in proportion with 55%＞Al
2O
3The alumine raw material of content>=35% are or/and Al
2O
3>=35% coal gangue raw material and wedding agent uniform mixing add the water spray granulation, process internal layer, add Al again
2O
3>=70% alumine raw material continue mist projection granulating, process skin; The spraying amount of water is 8～13% of a raw material weight; Oven dry is burnt till then.
Temperature during said the oven dry is 30～120 ℃, and drying time is 24～48h, and the temperature during said burning till is 1300～1650 ℃, and the soaking time under firing temperature is 8～16h.
Said granulating disc rotating speed is 10～40 rev/mins.
Some explanation:
(1) about the sintering temperature of raw material: Al
2O
3＞74% superfine, sintering temperature are about 1650 ℃, and 70～74%I level is about 1620 ℃; 62～70%II level is about 1650 ℃; 53～62%III level is about 1400～1550 ℃, and 44～53%IV level is about 1300～1400 ℃, and 35～44%V level is about 1300～1200 ℃.So the amount that the high-grade material of raw material mesectoderm accounts for is many more, then sintering temperature is also high more; The amount that the low-grade material of internal layer accounts for is many more, and then sintering temperature is also low more.
(2) ratio of internal layer and outer layered material is decided by the purposes of made raw material ball, can be divided into top grade, middle-grade and low-grade raw material ball, is series product; Spherical diameter also is series product from big to small, is generally 1～8mm.
(3) during mist projection granulating, raw material is not once to add, and is that gradation is interrupted adding, and the adding of water depends on the circumstances, but intermittent spray.
Positive beneficial effect of the present invention:
(1) gradient refractory raw material ball of the present invention is mainly used in the low cement deposit material aggregate that no slag corrosion environment uses, and this raw material ball product index is following: the Al of upper layer
2O
3>=80%, the Al of ball internal layer
2O
3>=40%, the Al of intermediate layer
2O
3Content has gradient property, volume density>=2.55g/cm
3, water-intake rate≤5.0%, diameter 1～8mm.
Raw material ball chemical ingredients of the present invention and mineral composition have gradient property: Al in the composition
2O
3Content reduces from the top layer to inside successively, SiO
2Content increases from the surface to inside successively; The essential mineral phase composition of ball: upper layer is corundum and a small amount of mullite, and intermediate layer is a mullite, and the ball internal layer is quartzy and a small amount of mullite.The top layer corundum has refractoriness and high-temperature stability preferably, and the transition layer mullite has anti-thermal shock stability preferably, and a kind of raw material has the performance of two kinds of mutual growth and decline, makes this raw material have flexibility widely.This raw material ball uses as the aggregate refractory castable, and good fluidity can improve the thermal shock resistance of anti-material under the prerequisite that does not influence other high-temperature behavior.
(2) utilize technology of the present invention; Can make full use of waste coal gangue in alumine mine tailing, muck and the colliery industry and produce the raw material for refractory of excellent property; Fully improve the utilization ratio of discarded ore; Reduce production costs, help energy-conserving and environment-protective, thereby alleviate present senior alumine problem in short supply day by day.
(3) the present invention helps making full use of of refuse, and method is simple, less investment, and instant effect is convenient to go into operation and apply.
Four, description of drawings:
Fig. 1: gradient refractory ball structural representation of the present invention
Among the figure: 1 expression internal layer, 2 expressions are outer.
Five, embodiment:
Embodiment one: a kind of gradient high-alumina refractory raw material ball, represent Al in the raw material with weight percentage
2O
3The alumine raw material of content>=70% account for 30%, and its granularity is less than 0.088mm; 55%＞Al
2O
3The alumine raw material of content>=35% account for 65%, granularity 0.044～0.2mm; Wedding agent water accounts for 5%.
Working method: take by weighing raw material in proportion, with 55%＞Al
2O
3The alumine raw material and the wedding agent of content>=35% mix, and add the water spray granulation, process internal layer, and the granulating disc rotating speed is 10 rev/mins; Add Al again
2O
3>=70% alumine raw material continue mist projection granulating, process skin, see Fig. 1; The spraying amount of water is 8% of a raw material weight; At 60～90 ℃ of oven dry of temperature, 30～36h, be incubated 10～13h down 1300～1350 ℃ of temperature and burn till then; The refractory raw material spherical diameter of processing is 1～8mm.
Embodiment two: a kind of gradient high-alumina refractory raw material ball, represent Al in the raw material with weight percentage
2O
3The alumine raw material of content>=70% account for 65%, and its granularity is less than 0.088mm; 55%＞Al
2O
3The alumine raw material of content>=35% account for 30%, granularity 0.044～0.2mm; Wedding agent water accounts for 5%.
Working method: take by weighing raw material in proportion, with 55%＞Al
2O
3The alumine raw material and the wedding agent of content>=35% mix, and add the water spray granulation, process internal layer, and the granulating disc rotating speed is 40 rev/mins, adds Al again
2O
3>=70% alumine raw material continue mist projection granulating, process skin; The spraying amount of water is 13% of a raw material weight; Oven dry 30h when temperature is 100 ℃ is incubated 10h and burns till under temperature is 1550 ℃ then.
Embodiment three: a kind of gradient high-alumina refractory raw material ball, represent Al in the raw material with weight percentage
2O
3The alumine raw material of content>=70% account for 31%, and its granularity is less than 0.088mm; 55%＞Al
2O
3The alumine raw material of content>=35% account for 64%, granularity 0.044～0.2mm; Wedding agent water accounts for 5%.
Working method: take by weighing raw material in proportion, with 55%＞Al
2O
3The alumine raw material and the wedding agent of content>=35% mix, and add the water spray granulation, process internal layer, and the granulating disc rotating speed is 20 rev/mins; Add Al again
2O
3>=70% alumine raw material continue mist projection granulating, process skin, and the spraying amount of water is 10% of a raw material weight; Oven dry 30h when temperature is 40 ℃ is incubated 12h and burns till under temperature is 1350 ℃ then.
Embodiment four: a kind of gradient high-alumina refractory raw material ball, represent Al in the raw material with weight percentage
2O
3The alumine raw material of content>=70% account for 64%, and its granularity is less than 0.088mm; 55%＞Al
2O
3The alumine raw material of content>=35% account for 33%, granularity 0.044～0.2mm; Wedding agent water accounts for 3%.
Working method: take by weighing raw material in proportion, with 55%＞Al
2O
3The alumine raw material and the wedding agent of content>=35% mix, and add the water spray granulation, process internal layer, and the granulating disc rotating speed is 30 rev/mins; Add Al again
2O
3>=70% alumine raw material continue mist projection granulating, process skin; The spraying amount of water is 12% of a raw material weight; Oven dry 24h when temperature is 120 ℃ is incubated 8h and burns till under temperature is 1600 ℃ then.
Embodiment five: a kind of gradient high-alumina refractory raw material ball, represent Al in the raw material with weight percentage
2O
3The alumine raw material of content>=70% account for 40%, and its granularity is less than 0.088mm; 55%＞Al
2O
3The alumine raw material of content>=35% account for 50%, granularity 0.044～0.2mm; Wedding agent water accounts for 10%.
Working method: take by weighing raw material in proportion, with 55%＞Al
2O
3The alumine raw material and the wedding agent of content>=35% mix, and add the water spray granulation, process internal layer, and the granulating disc rotating speed is 35 rev/mins; Add Al again
2O
3>=70% alumine raw material continue mist projection granulating, process skin; The spraying amount of water is 9% of a raw material weight; Oven dry 48h when temperature is 30 ℃ is incubated 16h and burns till under temperature is 1450 ℃ then.The diameter of this refractory raw material ball is 2～4mm.
Embodiment six: a kind of gradient high-alumina refractory raw material ball, represent Al in the raw material with weight percentage
2O
3The alumine raw material of content>=70% account for 58%, and its granularity is less than 0.088mm; 55%＞Al
2O
3The alumine raw material of content>=35% account for 37%, granularity 0.044～0.2mm; Wedding agent water accounts for 5%.
Working method: take by weighing raw material in proportion, with 55%＞Al
2O
3The alumine raw material of content>=35% and wedding agent uniform mixing add the water spray granulation, process internal layer, and the granulating disc rotating speed is 20 rev/mins; Add Al again
2O
3>=70% alumine raw material continue mist projection granulating; Amount of water is 10% of a raw material weight; Process skin, oven dry 40h when temperature is 80 ℃ is incubated 10～12h and burns till under temperature is 1500 ℃ then.
Embodiment seven: a kind of gradient high-alumina refractory raw material ball, represent Al in the raw material with weight percentage
2O
3The alumine raw material of content>=70% account for 55%, and its granularity is less than 0.088mm; Al
2O
3The coal gangue raw material of content>=35% account for 40%, granularity 0.044～0.2mm; Wedding agent water accounts for 5%.
Working method: take by weighing raw material in proportion, with Al
2O
3>=35% coal gangue raw material and wedding agent uniform mixing add the water spray granulation, process internal layer, and the granulating disc rotating speed is 30 rev/mins; Add Al again
2O
3>=70% alumine raw material continue mist projection granulating, process skin; Amount of water is 10% of a raw material weight; Oven dry 30h when temperature is 70 ℃ then in temperature is under 1300～1650 ℃, insulation 8～10h burns till.
Embodiment eight: a kind of gradient high-alumina refractory raw material ball, represent Al in the raw material with weight percentage
2O
3The alumine raw material of content>=70% account for 35%, and its granularity is less than 0.088mm; Al
2O
3The coal gangue raw material of content>=35% account for 55%, granularity 0.044～0.2mm; The wedding agent dextrin accounts for 10%.
Working method no longer repeats with embodiment seven.
Embodiment nine: a kind of gradient high-alumina refractory raw material ball, represent Al in the raw material with weight percentage
2O
3The alumine raw material of content>=70% account for 60%, and its granularity is less than 0.088mm; Al
2O
3The coal gangue raw material of content>=35% account for 35%, granularity 0.044～0.2mm; The wedding agent pulp powder accounts for 5%.
Working method no longer repeats with embodiment seven.
Embodiment ten: a kind of gradient high-alumina refractory raw material ball, represent Al in the raw material with weight percentage
2O
3The alumine raw material of content>=70% account for 45%, and its granularity is less than 0.088mm; Al
2O
3The coal gangue raw material of content>=35% account for 48%, granularity 0.044～0.2mm; The wedding agent calcium lignin sulphonate accounts for 7%.
Working method no longer repeats with embodiment seven.
Embodiment 11: a kind of gradient high-alumina refractory raw material ball, represent Al in the raw material with weight percentage
2O
3The alumine raw material of content>=70% account for 40%, and its granularity is less than 0.088mm; Al
2O
3The coal gangue raw material of content>=35% account for 55%, granularity 0.044～0.2mm; The wedding agent dextrin accounts for 5%.
Working method no longer repeats with embodiment seven.
Embodiment 12: a kind of gradient high-alumina refractory raw material ball, represent Al in the raw material with weight percentage
2O
3The alumine raw material of content>=70% account for 62%, and its granularity is less than 0.088mm; Al
2O
3The coal gangue raw material of content>=35% account for 35%, granularity 0.044～0.2mm; The wedding agent dextrin accounts for 3%.
Working method no longer repeats with embodiment seven.
Embodiment 13: a kind of gradient high-alumina refractory raw material ball, represent Al in the raw material with weight percentage
2O
3The alumine raw material of content>=70% account for 45%, and its granularity is less than 0.088mm; Al
2O
3The coal gangue raw material of content>=35% account for 53%, granularity 0.044～0.2mm; The wedding agent dextrin accounts for 2%.
Working method no longer repeats with embodiment seven.
Embodiment 14: a kind of gradient high-alumina refractory raw material ball, represent Al in the raw material with weight percentage
2O
3The alumine raw material of content>=70% account for 58%, and its granularity is less than 0.088mm; Al
2O
3The coal gangue raw material of content>=35% account for 39%, granularity 0.044～0.2mm; The wedding agent dextrin accounts for 3%.
Working method no longer repeats with embodiment seven.
Embodiment 15: a kind of gradient high-alumina refractory raw material ball, represent Al in the raw material with weight percentage
2O
3The alumine raw material of content>=70% account for 55%, and its granularity is less than 0.088mm; Al
2O
3The coal gangue raw material of content>=40% account for 41%, granularity 0.044～0.2mm; The wedding agent dextrin accounts for 4%.
Working method no longer repeats with embodiment seven.
Embodiment 16: a kind of gradient high-alumina refractory raw material ball, represent Al in the raw material with weight percentage
2O
3The alumine raw material of content>=70% account for 35%, and its granularity is less than 0.088mm; 55%＞Al
2O
3The alumine raw material of content>=35% account for 40%, granularity 0.044～0.2mm; Al
2O
3The coal gangue raw material of content>=35% account for 20%, granularity 0.044～0.2mm; Wedding agent water accounts for 5%.
Working method: take by weighing raw material in proportion, with 55%＞Al
2O
3The alumine raw material of content>=35%, coal gangue raw material and wedding agent mix, and add the water spray granulation, process internal layer, and the granulating disc rotating speed is 20 rev/mins, adds Al again
2O
3>=70% alumine raw material continue mist projection granulating, process skin; The spraying amount of water is 10% of a raw material weight; At 80 ℃ of oven dry of temperature 40h, be incubated 10～12h down 1300～1650 ℃ of temperature and burn till then.
Embodiment 17: a kind of gradient high-alumina refractory raw material ball, represent Al in the raw material with weight percentage
2O
3The alumine raw material of content>=70% account for 65%, and its granularity is less than 0.088mm; 55%＞Al
2O
3The alumine raw material of content>=35% account for 18%, granularity 0.044～0.2mm; Al
2O
3The coal gangue raw material of content>=35% account for 15%, granularity 0.044～0.2mm; Wedding agent water accounts for 2%.
Working method: take by weighing raw material in proportion, with 55%＞Al
2O
3The alumine raw material of content>=35%, coal gangue raw material and wedding agent uniform mixing add the water spray granulation, process internal layer, and the granulating disc rotating speed is 30 rev/mins; Add Al again
2O
3>=70% alumine raw material continue mist projection granulating, process skin; The spraying amount of water is 12% of a raw material weight; Dry 35h down for 100 ℃ in temperature then, insulation 12～14h burns till under temperature is 1450 ℃.
Embodiment 18: a kind of gradient high-alumina refractory raw material ball, represent Al in the raw material with weight percentage
2O
3The alumine raw material of content>=70% account for 55%, and its granularity is less than 0.088mm; 55%＞Al
2O
3The alumine raw material of content>=35% account for 20%, granularity 0.044～0.2mm; Al
2O
3The coal gangue raw material of content>=35% account for 23%, granularity 0.044～0.2mm; The wedding agent dextrin accounts for 2%.
Working method is with embodiment 16.
Embodiment 19: a kind of gradient high-alumina refractory raw material ball, represent Al in the raw material with weight percentage
2O
3The alumine raw material of content>=70% account for 40%, and its granularity is less than 0.088mm; 55%＞Al
2O
3The alumine raw material of content>=35% account for 15%, granularity 0.044～0.2mm; Al
2O
3The coal gangue raw material of content>=35% account for 35%, granularity 0.044～0.2mm; The wedding agent dextrin accounts for 5%, calcium lignin sulphonate accounts for 5%.
Working method is with embodiment 16.
Embodiment 20: a kind of gradient high-alumina refractory raw material ball, represent Al in the raw material with weight percentage
2O
3The alumine raw material of content>=70% account for 35%, and its granularity is less than 0.088mm; 55%＞Al
2O
3The alumine raw material of content>=35% account for 40%, granularity 0.044～0.2mm; Al
2O
3The coal gangue raw material of content>=35% account for 20%, granularity 0.044～0.2mm; Wedding agent water accounts for 2%, dextrin accounts for 3%.
Working method is with embodiment 16.
Embodiment 21: a kind of gradient high-alumina refractory raw material ball, represent Al in the raw material with weight percentage
2O
3The alumine raw material of content>=70% account for 55%, and its granularity is less than 0.088mm; 55%＞Al
2O
3The alumine raw material of content>=35% account for 10%, grain. degree 0.044～0.2mm; Al
2O
3The coal gangue raw material of content>=35% account for 28%, granularity 0.044～0.2mm; The wedding agent pulp powder accounts for 3%, calcium lignin sulphonate 4%.
Working method is with embodiment 16.
Embodiment 22: a kind of gradient high-alumina refractory raw material ball, represent Al in the raw material with weight percentage
2O
3The alumine raw material of content>=70% account for 62%, and its granularity is less than 0.088mm; 55%＞Al
2O
3The alumine raw material of content>=35% account for 15%, granularity 0.044～0.2mm; Al
2O
3The coal gangue raw material of content>=35% account for 15%, granularity 0.044～0.2mm; The wedding agent pulp powder accounts for 3%, calcium lignin sulphonate 5%.
Working method is with embodiment 16.
Embodiment 23: a kind of gradient high-alumina refractory raw material ball, represent Al in the raw material with weight percentage
2O
3The alumine raw material of content>=70% account for 32%, and its granularity is less than 0.088mm; 55%＞Al
2O
3The alumine raw material of content>=35% account for 22%, granularity 0.044～0.2mm; Al
2O
3The coal gangue raw material of content>=35% account for 43%, granularity 0.044～0.2mm; The wedding agent calcium lignin sulphonate accounts for 3%.
Working method is with embodiment 16.
Embodiment 24: a kind of gradient high-alumina refractory raw material ball, represent Al in the raw material with weight percentage
2O
3The alumine raw material of content>=70% account for 42%, and its granularity is less than 0.088mm; 55%＞Al
2O
3The alumine raw material of content>=35% account for 40%, granularity 0.044～0.2mm; Al
2O
3The coal gangue raw material of content>=35% account for 13%, granularity 0.044～0.2mm; The wedding agent calcium lignin sulphonate accounts for 5%.
Working method is with embodiment 16.
Embodiment 25: a kind of gradient high-alumina refractory raw material ball, represent Al in the raw material with weight percentage
2O
3The alumine raw material of content>=70% account for 39%, and its granularity is less than 0.088mm; 55%＞Al
2O
3The alumine raw material of content>=35% account for 19%, granularity 0.044～0.2mm; Al
2O
3The coal gangue raw material of content>=35% account for 40%, granularity 0.044～0.2mm; The wedding agent calcium lignin sulphonate accounts for 2%.
Working method is with embodiment 16.
Claims (6)
1. the working method of a gradient high-alumina refractory raw material ball is characterized in that: raw material representes with weight percentage, wherein Al
2O
3The alumine raw material of content>=70% account for 30～65%, 55%＞Al
2O
3The alumine raw material of content>=35% are or/and Al
2O
3The coal gangue raw material of content>=35% account for 30～65%, and wedding agent accounts for 1～10%; Take by weighing raw material in proportion, with 55%＞Al
2O
3The alumine raw material of content>=35% are or/and Al
2O
3>=35% coal gangue raw material and wedding agent uniform mixing add the water spray granulation, process internal layer; Add Al again
2O
3>=70% alumine raw material continue mist projection granulating, process skin; The spraying amount of water is 8～13% of a raw material weight; Oven dry is burnt till then.
2. working method according to claim 1 is characterized in that: Al wherein
2O
3The alumine raw material of content>=70% account for 40～60%, 55%＞Al
2O
3The alumine raw material of content>=35% are or/and Al
2O
3The coal gangue raw material of content>=35% account for 35～55%, and wedding agent accounts for 2～5%.
3. working method according to claim 1 is characterized in that: said Al
2O
3The alumine raw material granularity of content>=70% is less than 0.088mm, 55%＞Al
2O
3The alumine granularity of content>=35% is 0.044～0.2mm, and coal gangue raw material granularity is 0.044～0.2mm.
4. working method according to claim 1 is characterized in that: said wedding agent is one or more the combination in water, dextrin, pulp powder and the calcium lignin sulphonate.
5. the working method of gradient high-alumina refractory raw material ball according to claim 1; It is characterized in that: the temperature during said the oven dry is 30～120 ℃; Drying time is 24～48h, and the temperature during said burning till is 1300～1650 ℃, and the soaking time under firing temperature is 8～16h.
6. the working method of gradient high-alumina refractory raw material ball according to claim 1 is characterized in that: the granulating disc rotating speed is 10～40 rev/mins during said mist projection granulating.
Priority Applications (1)
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| CN102229501A (en) * | 2011-04-21 | 2011-11-02 | 河南省冶金研究所有限责任公司 | Method for preparing cristobalite-mullite composite refractory |
| CN103232250A (en) * | 2013-04-17 | 2013-08-07 | 孝义市和中兴矿产有限公司 | Method for manufacturing silicon mullite brick by adopting bauxite tailings |
| CN103641494B (en) * | 2013-11-20 | 2015-11-18 | 河南省新密正泰耐材有限公司 | A kind of mud binding matrix homogenizing High Alumina Bricks for Hot Blast Stove and preparation method thereof |
| CN104817328B (en) * | 2015-03-13 | 2018-04-27 | 李楠 | A kind of Al2O3-SiO2The production method of matter spherical fireproof material aggregate |
| CN115716756A (en) * | 2022-11-29 | 2023-02-28 | 阳泉金隅通达高温材料有限公司 | Preparation method and application of environment-friendly and energy-saving bauxite-based non-fired refractory raw material |
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| CN1521140A (en) * | 2003-01-27 | 2004-08-18 | 郑州豫兴氮氧结合耐火材料有限公司 | Highly regenerative fireproof ball |
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