CN102180654B - Process method for producing high-quality medium-alumina ceramic ball by inferior raw material - Google Patents

Process method for producing high-quality medium-alumina ceramic ball by inferior raw material Download PDF

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Publication number
CN102180654B
CN102180654B CN201110036768A CN201110036768A CN102180654B CN 102180654 B CN102180654 B CN 102180654B CN 201110036768 A CN201110036768 A CN 201110036768A CN 201110036768 A CN201110036768 A CN 201110036768A CN 102180654 B CN102180654 B CN 102180654B
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ball
quality
porcelain ball
low
bauxitic clay
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CN102180654A (en
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欧阳波
丁球萍
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PINGXIANG WUXING CERAMIC CO Ltd
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PINGXIANG WUXING CERAMIC CO Ltd
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Abstract

The invention discloses a process method for producing high-quality medium-alumina ceramic balls by inferior raw materials, which comprises the following steps: firstly washing a main raw material - inferior bauxite clinker with water, picking out to remove impurities, adding the inferior bauxite clinker with removed impurities, diaspore, clay, an efficient flux component and a diluent into a ball mill on a weight basis, performing ball milling twice with a proper amount of water, performing primary coarse milling and sieving by a 400-mesh sieve, performing secondary fine milling and sieving by a 600-mesh sieve, performing wet washing of the prepared slurry to remove iron, performing spray granulation and homogenization to prepare a mud blank, then performing dry-pressing, classification and molding with a mould, drying to prepare a semi-finished ceramic ball, charging the semi-finished ceramic ball into a kiln, sintering the ceramic ball at a preserved temperature of 1340 DEG C. The invention shortens the ball milling time, saves energy, reduces cost, uses a large amount of inferior raw materials, widens the range for material selection, produces high-quality medium-alumina ceramic balls with high strength, good wear resistance, and comparable application effect to existing medium-alumina ceramic balls, reduces production cost by 10-15%, is energy-saving and high-efficient, and facilitates healthy economic development.

Description

Utilize low-quality raw materials to produce the process method of high-quality middle aluminium porcelain ball
Technical field
The present invention relates to the producing and manufacturing technique of porcelain ball, the producing and manufacturing technique of aluminium porcelain ball in especially relating to.
Background technology
As everyone knows; The kind that contains aluminium porcelain ball is a lot; Common aluminium porcelain ball, middle aluminium porcelain ball, alumina porcelain ball, activated alumina porcelain ball, the inertia alumina ball etc. of containing are arranged, and they not only have intensity, wear resistance, acid and alkali-resistance and corrosion preferably, and nontoxic, tasteless and have purification, absorption, catalysis protection and a desiccation; Can be used for industries such as chemical industry, petrochemical industry, chemical fertilizer, pharmacy, smelting, building materials, combustion gas and environmental protection, purposes is very extensive.Increase along with porcelain ball aluminum content; The characteristics that intensity is higher, wear resistance better, density is bigger that middle aluminium porcelain ball, activated alumina porcelain and alumina porcelain ball have; Result of use is also quite obvious; Therefore they have obtained good popularization and application in above-mentioned industry, and the demand of middle aluminium porcelain ball, activated alumina porcelain ball and alumina porcelain ball is also just increasing, and the wherein high-quality middle aluminium porcelain ball and the demand of alumina porcelain ball account for major part again.Middle aluminium porcelain ball Al 2O 3Content is generally 60-70%, alumina porcelain ball Al 2O 3Content is generally more than 90%, and high-quality middle aluminium porcelain ball Al 2O 3Content is more than 65%.At present owing to contain Al in middle aluminium porcelain ball and the alumina porcelain ball 2O 3Amount is high, and manufacturer mostly adopts Al 2O 3Content is aluminium porcelain ball and alumina porcelain ball in the bauxite chamotte of 75-80% is produced as main raw material; Along with middle aluminium porcelain ball and alumina porcelain ball demand increase day by day; Be used for producing the raw material-bauxite chamotte of aluminium porcelain ball and alumina porcelain ball, particularly high-quality bauxite chamotte is more and more rare; Cause the bauxite chamotte supply shortage; Price is rising all the way also, and the production demand of alumina porcelain ball is restricted, and the production demand of aluminium porcelain ball has also received bigger influence in making.The main place of production-Henan and Guizhou as domestic bauxitic clay grog contain Al 2O 3The bauxite chamotte output of 75-80% is fewer and feweri, and Al 2O 3Content is at 65-70%, Fe 2O 3Content is at 2-2.4%, Ti0 2Content is more in the bauxitic clay grog output of the low-quality of 3-3.4%, and content is at Al 2O 371%-75% middle article bauxitic clay is also on the low side, because Al in the low-quality bauxitic clay grog 2O 3Content is on the low side, Fe 2O 3Content and Ti0 2Content is higher; Use low-quality bauxitic clay grog as main raw material adopt existing in aluminium porcelain ball method of manufacturing technology can't reach alumina porcelain ball performance, also differ bigger, difficult control of temperature when burning till with the performance of middle aluminium porcelain ball, high-quality especially middle aluminium porcelain; Cause the enterprise production difficulty thus; The quality product fluctuation is big, has not only increased the production cost of enterprise, but also has influenced the result of use of product.
Summary of the invention
To above-mentioned available technology adopting low-quality bauxitic clay grog is the problem of main raw material and the middle aluminium porcelain ball degradation that adopts existing process method to produce, and the present invention proposes a kind of process method of utilizing low-quality bauxitic clay grog high-quality middle aluminium porcelain ball for main material production goes out.
The technical scheme that the technical problem that the present invention will solve is taked is: the said process method of utilizing low-quality bauxitic clay grog to produce high-quality middle aluminium porcelain ball is:
1, earlier removal impurity is washed, selected to main raw material-low-quality bauxitic clay grog,
2, add the low-quality bauxitic clay grog after the impurity elimination, diaspore, clay, efficient flux and thinner in the ball mill by weight proportion; Add suitable quantity of water and carry out ball milling twice, once roughly grind earlier and mistake 400 mesh sieves, carry out the secondary fine grinding again and cross 600 mesh sieves; Process slurry
3, slurry is after washing deironing, and the mist projection granulating homogenizing is processed moulded pottery not yet put in a kiln to bake,
4, moulded pottery not yet put in a kiln to bake is processed work in-process porcelain ball through mould dry-pressing classification drying after forming,
5, work in-process porcelain ball is packed in the kiln, fire 1340 ℃ of insulations below the temperature and form.
Said each component weight percent is: low-quality bauxitic clay grog 50-75%, diaspore 15-40%, kaolin are that 3-6%, efficient flux are 2-4%.
Said low-quality bauxitic clay grog major ingredient: Al 2O 364.5%-68%, Fe 2O 32.2%-2.5%, Ti0 23.2%-3.4%, K 2O 1.2%-1.7%; Diaspore: major ingredient: Al 2O 360%-62%, Fe 2O 31.5%-1.8%, Ti0 22.0%-2.2%, K 2O 2.5%-2.8%;
Clay is preferably kaolin: its major ingredient: Al 2O 33.5%-37%, Fe 2O 31.2%-1.5%;
Said efficient flux is BaCO 3Or/and rhombspar pressed powder, fineness are all more than 250 orders;
Said thinner is the tripoly phosphate sodium STPP pressed powder.
Be the performance of aluminium porcelain ball in further the raising, in above-mentioned production is high-quality, add a small amount of middle article bauxitic clay grog in the raw material of aluminium porcelain ball, said middle article bauxitic clay grog major ingredient: Al 2O 371%-75% Fe 2O 31.8%-2.0%, Ti0 22.8%-3.0%, K 2O 1.2%-1.3%.
The Chemical Composition weight ratio of the high-quality middle aluminium porcelain ball that process method according to the invention is produced is: Al 2O 3>=65%, Fe 2O 3<1.5%, Ti0 2<2.8%, MgO+CaO<1.5%, K 2O+Na 2O<2.3%.
Each item performance index of the high-quality middle aluminium porcelain ball that process method according to the invention is produced are:
Proportion (g/cm3): >=3, water-intake rate:<0.3%, abrasion (‰):<0.4,
Mohs' hardness; >=7, ultimate compression strength (MPa): >=15, voidage (%): >=40%.
The present invention manage with delicacy be strict with control rationally under, the middle aluminium porcelain ball of producing, major ingredient content exists: Al 2O 3>65% Fe 2O 3<1.2% Ti0 2<2.0%, K 2O+Na 2O:2.0%-2.2%, proportion wear and tear about 0.3% between 3.0~3.05.
In according to the invention the main crystalline phase of aluminium porcelain ball be corundum with mullite mutually, corundum and mullite are the key factor of aluminium porcelain ball proportion and durable mill property in influencing mutually, the major ingredient Al in manufacturing is high-quality in the main raw material-bauxitic clay grog of aluminium porcelain ball 2O 3Content (general 5-10% on the low side) on the low side, and Fe 2O 3Content and Ti0 2When content is higher, if the content of taking to increase the bauxitic clay grog improves Al 2O 3Content, all can have a negative impact to sintering character and processability, also increased simultaneously the generation cost of enterprise.The present invention constantly refine to microcrystalline state through crystal grain in the process of adjusting process method use low-quality raw materials aluminium porcelain ball in production is high-quality, and cooperates efficient solvent to form the crystallite slurry through starting with on the method for manufacturing technology; Improved its flowability greatly; On the one hand make the crystallite slurry more carefully more even, compact and firm more behind the sintering has increased proportion; Increase hardness and intensity, improved wear resistance; Two aspects are because mobile raising more helps removing Fe 2O 3Content and Ti0 2Etc. various impurity.The present invention also passes through the adjustment sintering temperature, and employing is lower than existing middle aluminium aluminium ball burning line temperature and carries out sintering with temperature more than 30 ℃.
The present invention is through adding BaCO 3Or/and efficient solvents such as rhombspar make the slurry of formation have good sintering character, adapt to sintering temperature broad and lower.
The technological process of production of the present invention and process control procedure requirement
Technical process: raw material classify and pile up-bauxite clinker washing-raw material crushing-batching adds and grind-washes ball milling-slurry test-blowing and sieve-wash deironing-mist projection granulating-powder homogenizing-dry-pressing formed-advance klining and become-select the porcelain classification.
Process control procedure requires:
1. average diameter of particles remains on the 1-3 millimeter behind the raw material crushing,
2. ball milling slurry fineness is controlled at 600 and tails between the 0.3%-0.5%, and slurry moisture content keeps 35%-37%,
3. the mist projection granulating granularity keeps, and 40 mesh screen residue 5%-10%, 60 mesh screen residue 30%-35%, 80 mesh screen residue 35%-40%, 100 mesh screen residue 5%-10%, powder moisture content remain on 1.0%-1.5%,
4. dry-pressing formed press pressure is protected examination and is lower than 30MPa, protects examination base substrate compactness,
5. firing temperature preferably is controlled between 1280 ℃-1300 ℃, and firing period 33-36 hour, wherein high fire insulation 5-8 hour, guarantor's trial product reaches the best and changes effect with fixed attention.
The bauxitic clay grog that utilizes low-quality according to the invention is produced high-quality middle aluminium porcelain ball for main raw material process method with of the prior art in aluminium porcelain ball compare and have the following advantages:
1, can shorten the ball milling time, save energy reduces cost,
2, can use low-quality raw materials in a large number, widen selection range, and can produce that intensity height, wear resistance are good, result of use and with existing in aluminium porcelain ball compare favourably high-quality in aluminium porcelain ball, guarantee customer need,
3, can reduce the production cost of 10-15%, reach efficient energy-saving, help economic healthy Sustainable development.
Embodiment
Embodiment 1, by weight 75% low-quality bauxitic clay grog, 18% diaspore, 3% kaolin, 2%BaCO 3, 2% rhombspar and 0.3% tripoly phosphate sodium STPP that adds above-mentioned five kinds of raw material gross weights prepare burden, and earlier removal impurity is washed, selected to main raw material-low-quality bauxitic clay grog, with low-quality bauxitic clay grog, diaspore, clay, the BaCO after the impurity elimination 3, rhombspar and tripoly phosphate sodium STPP add in the ball mill by weight proportion, adds suitable quantity of water and carry out ball milling twice, once roughly grinds and cross 400 mesh sieves earlier; Then carry out the secondary fine grinding again and cross 600 mesh sieves, process slurry, make the slurry fineness be controlled at 600 and tail between the 0.3%-0.5%; Slurry moisture content keeps 35%-37%; Slurry is gone into the pond wash deironing, classification mist projection granulating homogenizing is processed moulded pottery not yet put in a kiln to bake, and moulded pottery not yet put in a kiln to bake is dried after mould is dry-pressing formed and processed work in-process porcelain ball; Work in-process porcelain ball is packed in the kiln, and insulation was fired and is formed in 5-8 hour under 1280-1300 ℃ of temperature.
Present embodiment 1 described high-quality middle aluminium porcelain nodularization composition is:
Al 2O 3:65.8%、Fe 2O 3:1.15%、Ti0 2:1.87%、?K 2O+NaO 2?:2.07%,
Each item performance index of the high-quality middle aluminium porcelain ball that the said process method of present embodiment 1 invention is produced are:
Proportion (g/cm3): 3.03, water-intake rate (%): 0.19, abrasion (‰): 0.32,
Mohs' hardness; 9, ultimate compression strength (MPa): 15.7, voidage (%): 44%.
Embodiment 2, by weight being 50% low-quality bauxitic clay grog, 40% diaspore, 6% kaolin, 4%BaCO 3With article bauxitic clay grog in 0.3% tripoly phosphate sodium STPP and 5% that adds above-mentioned four kinds of raw materials, prepare burden; Earlier removal impurity is washed, selected to main raw material-low-quality bauxitic clay grog, with low-quality bauxitic clay grog, diaspore, clay, the BaCO after the impurity elimination 3And the tripoly phosphate sodium STPP that adds and middle article bauxitic clay grog add in the ball mill by weight proportion, adds suitable quantity of water and carry out ball milling twice, once roughly grinds and cross 400 mesh sieves earlier; Then carry out the secondary fine grinding again and cross 600 mesh sieves, process slurry, make the slurry fineness be controlled at 600 and tail between the 0.3%-0.5%; Slurry moisture content keeps 35%-37%; Slurry is gone into the pond wash deironing, classification mist projection granulating homogenizing is processed moulded pottery not yet put in a kiln to bake, and moulded pottery not yet put in a kiln to bake is dried after mould is dry-pressing formed and processed work in-process porcelain ball; Work in-process porcelain ball is packed in the kiln, and insulation was fired and is formed in 5-8 hour under 1280-1300 ℃ of temperature.
Present embodiment 2 described high-quality middle aluminium porcelain nodularization compositions are:
Al 2O 3:68.8%、Fe 2O 3:1.06%、Ti0 2:1.75%、?K 2O+Na 2O?:2.15%,
Each item performance index of the high-quality middle aluminium porcelain ball that the said process method of present embodiment 2 inventions is produced are:
Proportion (g/cm3): 3.035, water-intake rate (%): 0.23, abrasion (‰): 0.31,
Mohs' hardness; 8.5, ultimate compression strength (MPa): 16.5, voidage (%): 47%.
Embodiment 3; By weight being that article bauxitic clay grog is prepared burden in 65% low-quality bauxitic clay grog, 30% diaspore, 3% kaolin, 2% rhombspar and 0.3% tripoly phosphate sodium STPP and 10% that adds above-mentioned four kinds of raw materials; Earlier removal impurity is washed, selected to main raw material-low-quality bauxitic clay grog, with low-quality bauxitic clay grog, diaspore, clay, the BaCO after the impurity elimination 3And the tripoly phosphate sodium STPP that adds and middle article bauxitic clay grog add in the ball mill by weight proportion, adds suitable quantity of water and carry out ball milling twice, once roughly grinds and cross 400 mesh sieves earlier; Then carry out the secondary fine grinding again and cross 600 mesh sieves, process slurry, make the slurry fineness be controlled at 600 and tail between the 0.3%-0.5%; Slurry moisture content keeps 35%-37%; Slurry is gone into the pond wash deironing, classification mist projection granulating homogenizing is processed moulded pottery not yet put in a kiln to bake, and moulded pottery not yet put in a kiln to bake is dried after mould is dry-pressing formed and processed work in-process porcelain ball; Work in-process porcelain ball is packed in the kiln, and insulation was fired and is formed in 5-8 hour under 1280-1300 ℃ of temperature.
Present embodiment 3 described high-quality middle aluminium porcelain nodularization compositions are:
Al 2O 3:67.2%、Fe 2O 3:1.13%、Ti0 2:1.89%、?K 2O+Na 2?O:2.13%,
Each item performance index of the high-quality middle aluminium porcelain ball that the said process method of present embodiment 3 inventions is produced are:
Proportion (g/cm3): 3.026, water-intake rate (%): 0.25, abrasion (‰): 0.29
Mohs' hardness; 9.3, ultimate compression strength (MPa): 17.5, voidage (%): 50.2%.

Claims (1)

1. utilize low-quality bauxitic clay grog to produce the process method of high-quality middle aluminium porcelain ball, it is characterized in that: said process method step comprises:
Removal impurity is washed, selected in a, elder generation to main raw material-low-quality bauxitic clay grog,
B, be that the low-quality bauxitic clay grog of 50-75%, the diaspore of 15-40%, the kaolin of 3-6% and efficient flux component and the thinner of 2-4% add in the ball mill by weight proportion with weight ratio after the impurity elimination; Add suitable quantity of water and carry out ball milling twice; Once roughly grind and cross 400 mesh sieves earlier; Carry out the secondary fine grinding again and cross 600 mesh sieves, process slurry
C, slurry are after washing deironing, and the mist projection granulating homogenizing is processed moulded pottery not yet put in a kiln to bake,
D, moulded pottery not yet put in a kiln to bake are processed work in-process porcelain ball through mould dry-pressing classification drying after forming,
E, work in-process porcelain ball is packed in the kiln, fire 1340 ℃ of insulations below the temperature and form.
CN201110036768A 2011-02-12 2011-02-12 Process method for producing high-quality medium-alumina ceramic ball by inferior raw material Expired - Fee Related CN102180654B (en)

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