CN1060750C

CN1060750C - Method for producing corundum ceramics using alumine as main raw material and its products

Info

Publication number: CN1060750C
Application number: CN97117247A
Authority: CN
Inventors: 赵德胜
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-09-04
Filing date: 1997-09-04
Publication date: 2001-01-17
Anticipated expiration: 2017-09-04
Also published as: CN1187479A

Abstract

The present invention relates to a method for producing corundum ceramic wares by high aluminum bauxite as main raw materials and a corundum ceramic ware thereof. The method for producing corundum ceramic wares by high aluminum bauxite as main raw materials comprises the following steps: an additive agent, binding clay and high aluminium agglomerate materials are prepared into binding materials; the binding materials and the high aluminium agglomerate materials are ground into pulp materials; the oven-dried pulp materials are added into molten paraffin to prepare a thermoplastic blank; a product is formed by an injection molding process, a paraffin removing process and a roasting process. The product uses corundum as a main crystal phase, the content of Al2O3 reaches 55 to 85%, and the corundum ceramic ware of the method for producing corundum ceramic wares by high aluminum bauxite as main raw materials has the advantages of high stiffness, good toughness, high grinding efficiency, long service life and low cost. Grinding balls, lining plates and wear-resisting plates produced by the method for producing corundum ceramic wares by high aluminum bauxite as main raw materials are widely matched with ball grinders, coal selecting appliances and mine selecting appliances for use.

Description

With the alumine is the method that main raw material is made the corundum ceramic goods

The present invention relates to a kind of is the method that main raw material is made the corundum ceramic goods with the alumine, and the corundum ceramic goods.

In refractory materials and Cement industry, material adopts ball mill processing usually, and abrading-ball, liner plate that ball mill uses adopt cast steel or ceramic more, though cast-steel grinding ball and liner plate hardness height, good toughness, but the abrading-ball surface often has a small amount of finely divided iron powder to fall to sneaking in the material in the process of lapping, often needs to increase to remove the iron powder operation, causes production cost to increase, and the iron powder in the material to remove fully also be impossible, directly influence the quality and the use properties of product.

For addressing the above problem, abrading-ball and the liner plate made of good high-abrasive material have been developed at present, as product innovations such as sintered alumina and fusion corundum abrading-ball, liner plates.This series products hardness height, the mill efficiency height, long service life can not produce detrimental impurity and sneak into and influence quality product in the material.But its used main raw material is the very high commercial alumina of price etc., the product cost height, and the price height is difficult for being accepted by users.In industries such as the cement of Shanxi Province, chemical industry, pottery, stone flour, breeze, refractory materials, use about more than 2,000 families of unit of ball mill, but use above-mentioned abrading-ball of new generation, what is heard also arranged by the unit of plate.

The object of the present invention is to provide a kind of is main raw material with the alumine, add an amount of additive and make the method for corundum ceramic goods, and corundum ceramic goods, to satisfy relevant industries to high rigidity, long lifetime, corundum ceramic goods cheaply, as grinding ball for ball mill and liner plate, coal separation (or ore dressing) the equipment demand of wearing piece.

Of the present invention is the method that main raw material is made the corundum ceramic goods with the alumine, it is characterized in that comprising the steps:

(1) the preparation binder is got additive synthetic material 15～50% (weight), bonding clay 10～80% (weight), Al ₂O ₃The high bauxite clinker powder 0～70% (weight) of content 60～90%, three's total amount are 100% (weight), and the ball mill of packing into, and the clear water of adding and three's total amount equivalent grind to form binder;

(2) get above-mentioned binder 10～35% (in siccative weight), Al ₂O ₃The high bauxite clinker powder 65～90% (weight) of content 60～90%, the two total amount are 100% (weight), and the ball mill of packing into, and the clear water of adding and described high bauxite clinker powder equivalent grind to form slurry shape material;

(3) above-mentioned slurry shape material is dried under 150～200 ℃ of temperature make dry mash;

(4) dry mash with 75～80% (weight) adds in the melted paraffin of 20～25% (weight), stirs, and makes its temperature remain on 100～120 ℃, is thermoplastic blanks;

(5) above-mentioned thermoplastic blanks is injected into goods base substrate, de-waxing then by the thermoplastic injection molding machine;

(6) the goods base substrate behind de-waxing is placed kiln, under 1400～1550 ℃ of high temperature, 48～72 hours burnt products of roasting.

Corundum ceramic goods of Zhi Zuoing according to the method described above, its crystal phase structure is principal crystalline phase with the corundum, all the other are mullite and glassy phase, Al ₂O ₃Content 55～85%, SiO ₂Content is 5～40%.

The corundum ceramic goods of making according to the method described above are abrading-ball or liner plates that ball mill is used, and also can be the various wearing plates that coal separation (or ore dressing) equipment is used.

The present invention is used contains Al ₂O ₃60～90% bauxite chamotte, the alumine of preferably selecting for use areas such as Lin County, Shanxi Province, Yangquan to produce is fired.Selection contains Al ₂O ₃60～90% alumine after 1000 ℃ or 1500 ℃ of calcinings, again through jaw formula machine, dry mill, tuber grinder fragmentation, is ground into material particular diameter in little 1.5mm high-alumina powder clinker.

The used additive synthetic material of the present invention is divided into two groups of A, B, and the A group is made up of salt, and the B group is made up of oxide compound.The weight percentages of A group additive synthetic material is: CaCO ₃30～40%, Mg ₃Si ₄O ₁₁35～55%, BaCo ₃5～25%.The weight percentages of B group additive synthetic material is: MnO ₂45～55%, TiO ₂25～35%, Cr ₂O ₃15～25%, Co ₂O ₃1～5%.

During preparation additive synthetic material, by above-mentioned A group or B group component batching, in the ball mill of packing into, and the clear water of adding and additive each component total amount equivalent, be ground to a material material φ＜0.025mm and get final product.

The selected bonding clay of the present invention is kieselguhr or kaolin or burns kaolin.

Further describe the present invention below in conjunction with embodiment.

Embodiment one:

(1) preparation binder

Get and contain CaCO ₃30%, Mg ₃Si ₄O ₁₁50%, BaCo ₃20% A group additive synthetic material 40% (in siccative weight) is burnt kaolin 60% (weight), the ball mill of packing into, and add and burn the clear water of kaolin equivalent, be ground to material particular diameter less than 0.032mm.

(2) get above-mentioned binder 30% (in siccative weight), contain Al ₂O ₃70.5% high bauxite clinker powder 70% (weight) adds ball mill, and the clear water of adding and high alumina equivalent, is ground to material particular diameter less than 0.04mm, makes slurry shape material.

(3) with above-mentioned slurry shape material, under drainage, 170 ℃ of temperature, dry, be ground into dry mash.

(4) get paraffin 20% and place roasting wax jar heating roastingization after, add above-mentioned dry mash 80%, stir with stirrer, make its temperature remain on 100～120 ℃, be thermoplastic blanks.

(5) above-mentioned thermoplastic blanks is injected into the goods base substrate by the thermoplastic injection molding machine.

(6) the goods base substrate places kiln, 48～72 hours burnt products of roasting under 1400～1420 ℃ of high temperature after wax expelling furnace de-waxing, trimming.

Embodiment two:

Present embodiment is selected B group additive synthetic material for use, and its weight percentages is: MnO ₂45%, TiO ₂30%, Cr ₂O ₃23%, Co ₂O ₃2%.

During the preparation binder, get above-mentioned B group additive synthetic material 20% (in siccative weight), kieselguhr 30% contains Al ₂O ₃91.5% high bauxite clinker powder 50%, in the ball mill of packing into, and the clear water of adding and kieselguhr and high alumina equivalent, be ground to the material particles diameter less than 0.032mm, promptly make binder.

Get above-mentioned binder 28% (in siccative weight), contain Al ₂O ₃91.5% high bauxite clinker powder 72%, in the ball mill of packing into, and the clear water of adding and high-alumina powder clinker equivalent, be ground to material particular diameter less than 0.04mm, promptly make slurry shape material.

Follow-up each operation is described with embodiment one substantially, and different is into the kiln maturing temperature is 1450～1470 ℃.

Embodiment three:

Present embodiment is selected A group additive synthetic material for use, and its weight percentages content is: CaCO ₃(calcite) 39%, Mg ₃Si ₄O ₁₁(talcum powder) 40%, BaCo ₃21%.

During the preparation binder, get above-mentioned additive synthetic material 30% (in siccative weight), kieselguhr 30%, burn kaolin 40%, in the ball mill of packing into, and the clear water of adding and weight such as kieselguhr and burning kaolin, be ground to the material grain through less than 0.032mm, binder.

Get above-mentioned binder 33% (in siccative weight), Al ₂O ₃Content is 91.5% high bauxite clinker powder 67%, in the ball mill of packing into, and the clear water of weight such as adding and high bauxite clinker powder, grind to form slurry shape material.

The follow-up sintering temperature is 1520～1540 ℃, and all the other operations are described with embodiment one fully, repeat no more herein.

Advantage of the present invention is as follows:

The invention provides a kind of is main raw material with the alumine, add an amount of additive and bonding clay and make the method for corundum ceramic goods, its main raw material is selected the alumine of high-quality low-cost for use, cost reduces greatly, its cost is about about 1/4th of commercial alumina goods, but it has very high corundum content, has the high rigidity of alumina article.Owing to adopted salt, oxide-based additive, improved the intensity of glassy phase in the goods significantly, goods hardness height, good toughness, the mill efficiency height, long service life, and do not produce detrimental impurity.

Corundum ceramic goods of the present invention comprise abrading-ball, liner plate and various wearing plate, extensively are suitable for ball mill, cleaning unit, the supporting use of preparation equipment.

Goods of the present invention through ceramic test station, Shanxi Province, unit tests such as Lin County, Shanxi refractory factory, cement mill, Lin County, the result is as follows:

(1) impact test

Size of sample 50 * 50 * 50mm falls to falling to impact sample naturally with 2500 gram iron ball 1M height and does not decrease for 10 times.

(2) withstand voltage destructive test

Size of sample φ 50mm abrading-ball, recording ultimate pressure is 85250kg.

(3) size of sample 50 * 50 * 10mm, Mohs' hardness is 8.

(4) size of sample 120 * 10 * 10mm, the anti-pressure that fractures is 1527kg.

(5) make wearing test with carborundum disc

Sample 112 * 112 * 12mm wearing plate, wear intensity is identical with U.S. white fused alumina wearing plate.

φ 70 provided by the invention, φ 50mm abrading-ball, through Lin County, Shanxi refractory factory, cement mill, Lin County, the contrast use-testing result of Heshun County ceramics factory be: be 19.57 times of Normal Steel Casting abrading-ball the work-ing life of abrading-ball, is 44.5 times of stone matter abrading-ball.The mill efficiency of abrading-ball is 2 times of Normal Steel Casting abrading-ball, is 11 times of stone matter abrading-ball.

Claims

1, a kind of is the method that main raw material is made the corundum ceramic goods with the alumine, it is characterized in that it comprises the steps:

(1) the preparation binder is got additive synthetic material 15-50% (weight), bonding clay 10-80% (weight), AL ₂O ₃The high bauxite clinker powder 0-70% (weight) of content 60-90%, three's total amount is 100% (weight), the ball mill of packing into, and the clear water of adding and three's total amount equivalent grind to form binder;

Described additive synthetic material is A group or B group additive synthetic material, and A group additive synthetic material contains: CaCO ₃30-40% (weight), Mg ₃Si ₄O ₁₁35-55% (weight), BaCO ₃5-25% (weight); B group additive synthetic material contains: MnO ₂45-55% (weight), TiO ₂25-35% (weight), Cr ₂O ₃15-25% (weight), Co ₂O ₃1-5% (weight);

(2) get above-mentioned binder 10-35% (in siccative weight), AL ₂O ₃The high bauxite clinker powder 65-90% (weight) of content 60-90%, the two total amount is 100% (weight), the ball mill of packing into, and the clear water of adding and described high bauxite clinker powder equivalent grind to form slurry shape material;

(3) above-mentioned slurry shape material is dried under 150-200 ℃ of temperature make dry mash;

(4) the siccative powder with 75-80% (weight) adds in the melted paraffin of 20-25% (weight), stirs, and makes its temperature remain on 100-120 ℃, is thermoplastic blanks;

(5) above-mentioned thermoplastic blanks is injected into the goods blank by the thermoplastic injection molding machine; De-waxing then;

(6) the goods base substrate behind de-waxing is placed kiln, under 1400-1550 ℃ of high temperature, roasting 48-72 hour burnt product.

2, method according to claim 1 is characterized in that: the material particular diameter of described binder is less than 0.032mm.

3, method according to claim 1 is characterized in that: the material particular diameter of described slurry shape material is less than 0.04mm.