CN101696112A - Method for preparing medium and high-aluminum abrasion-resistant ceramic product by using rolling rod waste - Google Patents
Method for preparing medium and high-aluminum abrasion-resistant ceramic product by using rolling rod waste Download PDFInfo
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Abstract
The invention discloses a method for preparing a medium and high-aluminum abrasion-resistant ceramic product by using rolling rod waste, which comprises the following steps: crushing the ceramic rolling rod waste serving as a main raw material, then blending the crushed ceramic rolling rod waste, waste active alumina balls, kaolin, alkaline earth active oxide and the like in a certain ratio, ball-milling and stirring and grinding the materials, shaping the materials through cold isopressing or die pressing after spray granulation, and sintering the materials at a temperature of between 1,300 and 1,340 DEG C, wherein the alumina content of the obtained medium and high-aluminum abrasion-resistant ceramic product is 70 to 76 percent, the volume density is 3.25 to 3.45 g/cm3, and the abrasion loss in each hour is less than 0.025 percent. The method can furthest utilize the rolling rod waste under the premise of ensuring the density and abrasion resistance of the medium and high-aluminum ceramic product, implements high value-added recycle of the industrial solid waste, remarkably reduces the preparation cost of the medium and high-aluminum abrasion-resistant ceramic product, and expands the application field.
Description
Technical field
The present invention relates to material preparation technology, further be meant with high aluminum abrasion-resistant ceramic product in the preparation of ceramic rod waste material, high aluminium ball and lining brick etc. in comprising.
Background technology
High aluminum abrasion-resistant ceramic product mainly is Al in the domestic production at present
2O
3-SiO
2System, Al
2O
3Content is 60～80%, is added with a small amount of feldspar and auxiliary agents such as CaO, MgO, and firing temperature is generally between 1350～1450 ℃.The main production flow process is: raw material precomminution → ball milling → sieve → deironing → spraying drying (dry method)/press filtration, vacuum pugging (wet method) → shaping (dry method or wet method) → burn till.In high aluminum abrasion-resistant ceramic product because of having good wear-resisting, corrosion resistance characteristic, and price is lower than high alumina ceramic, thereby be widely used in the raw material fine grinding processing of industries such as pottery, coating, chemical industry, nonmetalliferous ore, be a kind of fine grinding medium and inner lining material.
Be used for preparing the main raw material of high aluminum abrasion-resistant ceramic product at present for calcining industrial aluminum oxide powder.The price of homemade in recent years calcining industry aluminum oxide powder fluctuates between 4000～6000 yuan/ton, and the price of import aluminum oxide powder is then higher.Over past ten years, the fast development of China's construction sanitary ceramic and domestic ceramics has driven the rapid increase that is used for the roller kiln quantity that pottery burns till, as the output of the ceramic rod of roller kiln key part more than 10,000 ton of more than 60,000 ton of being increased to 2007 by nineteen ninety-five.Because ceramic rod is the consumable part in the roller kiln, be generally work-ing life 6～10 months, promptly annual have at least 5 ten thousand tons ceramic rod waste material to produce.Because of the chemical constitution in the ceramic rod close with middle high alumina ceramic goods; therefore; with roller rod waste material substitute most of in addition all calcine industrial alumina raw material prepare in high aluminum abrasion-resistant ceramic product; be feasible on know-why, and have many-sided advantage such as economize on resources, preserve the ecological environment, reduce production costs.
Summary of the invention
The technical problem to be solved in the present invention is, a kind of method with high aluminum abrasion-resistant ceramic product in the roller rod waste material preparation is proposed, this method can be in guaranteeing under the prerequisite of high alumina ceramic extrudate density and wear resistance, can maximally utilise roller rod waste material, realize the high added value recycle of industrial solid castoff, and the preparation cost of high aluminum abrasion-resistant ceramic product in significantly reducing, the broadened application field.
Technical scheme of the present invention is that described method with high aluminum abrasion-resistant ceramic product in the roller rod waste material preparation is:
(1) the discarded aluminum oxide ceramic rod in the ceramic roller kiln is reclaimed cleaning, be crushed to granularity less than 100 purpose roller rod waste material powders; Prepare burden by mass parts with following raw material:
75 parts-88 parts of roller rod waste material powders,
3 parts-12 parts of active alumina balls,
1 part-5 parts of kaolin,
0 part-3 parts of Paris whites,
0 part-3 parts in magnesiumcarbonate powder,
0 part-3 parts in barium carbonate powder,
0 part-3 parts of talcum powder get admixtion;
(2) packing into above-mentioned admixtion with middle high alumina ceramic is in the ball mill of grinding element and liner, press admixtion: the porcelain ball: the mass ratio of water=1: 1.5-2: 0.4-0.6 adds porcelain ball and water, ball milling 15 hours-20 hours, when the admixtion median size reaches below 20 microns, emit, get the preliminary grinding slurry;
(3) above-mentioned preliminary grinding slurry being packed in the agitator mill, is grinding element with the middle alumina porcelain ball of 10 millimeters-15 millimeters of diameters, and continuously grinding 1 hour-3 hours is emitted the slurry of must regrinding when the slurry median size reaches below 3 microns;
(4) the above-mentioned slurry of regrinding is sieved, deironing, carry out mist projection granulating then, get particle diameter and be 40 orders-120 purpose powder through pressure forming, obtain the density green article;
(5) described green article is placed combustion gas shuttle kiln or tunnel furnace, be warming up to 1300 ℃-1340 ℃, be incubated 1 hour-3 hours with 50 ℃-80 ℃ temperature rise rate per hour, high aluminum abrasion-resistant ceramic product in promptly getting after the cooling, this extrudate density is 3.25g/cm
3-3.45g/cm
3
In the above-mentioned steps (1), described discarded aluminum oxide ceramic rod can be that alumina content (mass ratio) is the ceramic rod of 65%-78%; Described active alumina balls is a kind of waste material that is used for the pottery of Chemical Manufacture, contains a small amount of volatile matter, and after 1000 ℃ of pyroprocessing, alumina content is not less than 98%.
In the above-mentioned steps (4), it is spherical goods that cold isostatic compaction is adopted in the pressure forming of described acquisition green article, or is compressed to brick shape goods with punching block; Compacting pressure is 60MPa-120MPa; Described isostatic cool pressing comprises static pressure methods such as static pressure such as dry type and wet type.
Below the present invention made further specify.
Technical contribution of the present invention is that this nondegradable industrial waste of ceramic rod waste material is carried out resource recovery and high value added utilization, as main raw material, has significantly reduced the production cost of middle high abrasion ceramic with it; By adding a certain amount of chemical industry depleted activated alumina ball, not only can adjust the alumina content in the goods, and can solve the problem that roller rod waste material sintering activity difference is unfavorable for densification sintering preferably, with calcium carbonate superfine powder (magnesium, barium) is sintering aid, not only can significantly reduce the sintering temperature of goods, save energy, and can promote the generation of secondary mullite, significantly improved the wear resisting property of goods.
The present invention with at present common in high aluminum abrasion-resistant ceramic product compare, at first be that the alumina raw material cost significantly reduces, make industrial waste obtain resource utilization and high value added utilization simultaneously, have good economic benefit and social benefit.Secondly, the ball milling that the present invention adopts grinds the raw material process for refining that combines with stirring, and makes corundum crystal grain micritization, helps goods sintering and improve wear resisting property at a lower temperature.The 3rd, the alkaline-earth metal activating oxide that employing is obtained by ultra-fine carbonate decomposition is a sintering aid, 30 ℃-40 ℃ of the sintering temperatures of goods have been reduced on the one hand, help the structure miniaturization, simultaneously can also promote the formation of secondary needle-like mullite, product is finer and close, intensity is high, wear resisting property is better thereby make.
Adopt the middle high alumina ceramic goods of the present invention's preparation, its alumina content is 70%-76%, and firing temperature is 1300 ℃-1340 ℃, and volume density is 3.25g/cm
3-3.45g/cm
3, abrasion loss hourly is starkly lower than the abrasion loss of like product 0.05%-0.1% on the market less than 0.025%.
As known from the above, the present invention is a kind of method with high aluminum abrasion-resistant ceramic product in the roller rod waste material preparation, under the prerequisite of this method high alumina ceramic extrudate density and wear resistance in guaranteeing, can maximally utilise roller rod waste material, realize the high added value recycle of industrial solid castoff, and the preparation cost of high aluminum abrasion-resistant ceramic product in significantly reducing, the broadened application field.
Embodiment
Embodiment 1: described method with high aluminum abrasion-resistant ceramic product in the roller rod waste material preparation is:
(1) the discarded aluminum oxide ceramic rod in the ceramic roller kiln is reclaimed cleaning, be crushed to granularity less than 100 purpose roller rod waste material powders; Prepare burden by mass parts with following raw material:
76 parts of roller rod waste material powders,
12 parts of active alumina balls,
3 parts of kaolin,
2 parts in lime carbonate,
2 parts in magnesiumcarbonate,
3 parts of barium carbonates,
2 parts of talcum powder get admixtion;
(2) packing into above-mentioned admixtion with middle high alumina ceramic is in the ball mill of grinding element and liner, press admixtion: the porcelain ball: the mass ratio of water=1: 2: 0.6 adds porcelain ball and water, ball milling 15 hours-20 hours is emitted when the admixtion median size reaches below 20 microns, gets the preliminary grinding slurry;
(3) above-mentioned preliminary grinding slurry being packed in the agitator mill, is grinding element with the middle alumina porcelain ball of 10 millimeters-15 millimeters of diameters, and continuously grinding 1 hour-3 hours is emitted the slurry of must regrinding when the slurry median size reaches below 3 microns;
(4) the above-mentioned slurry of regrinding is sieved, strong magnetic deironing, carry out mist projection granulating then, get particle diameter and be 40 orders-120 purpose powder through pressure forming, obtain green article;
(5) described green article is placed combustion gas shuttle kiln or tunnel furnace, be warming up to 1300 ℃, be incubated 3 hours with 50 ℃-80 ℃ temperature rise rate per hour, high aluminum abrasion-resistant ceramic product in promptly getting after the cooling, this extrudate density is 3.43g/cm
3, abrasion loss hourly only is 0.012%.
In the above-mentioned steps (1), described discarded aluminum oxide ceramic rod can be that alumina content (mass ratio) is the ceramic rod of 65%-78%.
In the above-mentioned steps (4), it is spherical goods that the wet type cold isostatic compaction is adopted in the pressure forming of described acquisition green article, and compacting pressure is 120MPa.
Embodiment 2: described method with high aluminum abrasion-resistant ceramic product in the roller rod waste material preparation is:
(1) the discarded aluminum oxide ceramic rod in the ceramic roller kiln is reclaimed cleaning, be crushed to granularity less than 100 purpose roller rod waste material powders; Prepare burden by mass parts with following raw material:
86 parts of roller rod waste material powders,
5 parts of active alumina balls,
3 parts of kaolin,
2 parts in lime carbonate,
2 parts in magnesiumcarbonate,
2 parts of barium carbonates get admixtion;
(2) packing into above-mentioned admixtion with middle high alumina ceramic is in the ball mill of grinding element and liner, press admixtion: the porcelain ball: the mass ratio of water=1: 1.5: 0.45 adds porcelain ball and water, ball milling 15 hours-20 hours is emitted when the admixtion median size reaches below 20 microns, gets the preliminary grinding slurry;
(3) above-mentioned preliminary grinding slurry being packed in the agitator mill, is grinding element with the middle alumina porcelain ball of 10 millimeters-15 millimeters of diameters, and continuously grinding 1 hour-3 hours is emitted the slurry of must regrinding when the slurry median size reaches below 3 microns;
(4) the above-mentioned slurry of regrinding is sieved, strong magnetic deironing, carry out mist projection granulating then, get particle diameter and be 40 orders-120 purpose powder through pressure forming, obtain green article;
(5) described green article is placed combustion gas shuttle kiln or tunnel furnace, be warming up to 1340 ℃, be incubated 3 hours with 50 ℃-80 ℃ temperature rise rate per hour, high aluminum abrasion-resistant ceramic product in promptly getting after the cooling, this extrudate density is 3.28g/cm
3, abrasion loss hourly is 0.022%.
In the above-mentioned steps (1), described discarded aluminum oxide ceramic rod is that alumina content (mass ratio) is the ceramic rod of 65%-78%.
In the above-mentioned steps (4), it is spherical goods that the dry cold hydrostatic pressing is adopted in the pressure forming of described acquisition green article, and compacting pressure is 80MPa.
Embodiment 3:
Described method with high aluminum abrasion-resistant ceramic product in the roller rod waste material preparation is:
(1) the discarded aluminum oxide ceramic rod in the ceramic roller kiln is reclaimed cleaning, be crushed to granularity less than 100 purpose roller rod waste material powders; Prepare burden by mass parts with following raw material:
80 parts of roller rod waste material powders,
8 parts of active alumina balls,
5 parts of kaolin,
2 parts of Paris whites,
3 parts in barium carbonate powder,
2 parts of talcum powder get admixtion;
(2) packing into above-mentioned admixtion with middle high alumina ceramic is in the ball mill of grinding element and liner, press admixtion: the porcelain ball: the mass ratio of water=1: 1.75: 0.5 adds porcelain ball and water, ball milling 15 hours-20 hours is emitted when the admixtion median size reaches below 20 microns, gets the preliminary grinding slurry;
(3) above-mentioned preliminary grinding slurry being packed in the agitator mill, is grinding element with the middle alumina porcelain ball of 10 millimeters-15 millimeters of diameters, and continuously grinding 1 hour-3 hours is emitted the slurry of must regrinding when the slurry median size reaches below 3 microns;
(4) the above-mentioned slurry of regrinding is sieved, strong magnetic deironing, carry out mist projection granulating then, get particle diameter and be 40 orders-120 purpose powder through pressure forming, obtain green article;
(5) described green article is placed combustion gas shuttle kiln or tunnel furnace, be warming up to 1320 ℃, be incubated 2 hours with 50 ℃-80 ℃ temperature rise rate per hour, high aluminum abrasion-resistant ceramic product in promptly getting after the cooling, this extrudate density is 3.36g/cm
3, abrasion loss hourly is 0.017%.
In the above-mentioned steps (1), described discarded aluminum oxide ceramic rod can be that alumina content (mass ratio) is the ceramic rod of 65%-78%.
In the above-mentioned steps (4), the pressure forming of described acquisition green article adopts punching block to be compressed to brick shape goods; Compacting pressure is 100MPa.
Claims (4)
1. method with high aluminum abrasion-resistant ceramic product in the roller rod waste material preparation, its processing step is:
(1) the discarded aluminum oxide ceramic rod in the ceramic roller kiln is reclaimed cleaning, be crushed to granularity less than 100 purpose roller rod waste material powders; Prepare burden by mass parts with following raw material:
75 parts-88 parts of roller rod waste material powders,
3 parts-12 parts of active alumina balls,
1 part-5 parts of kaolin,
0 part-3 parts of Paris whites,
0 part-3 parts in magnesiumcarbonate powder,
0 part-3 parts in barium carbonate powder,
0 part-3 parts of talcum powder get admixtion;
(2) packing into above-mentioned admixtion with middle high alumina ceramic is in the ball mill of grinding element and liner, press admixtion: the porcelain ball: the mass ratio of water=1: 1.5-2: 0.4-0.6 adds porcelain ball and water, ball milling 15 hours-20 hours, when the admixtion median size reaches below 20 microns, emit, get the preliminary grinding slurry;
(3) above-mentioned preliminary grinding slurry being packed in the agitator mill, is grinding element with the middle alumina porcelain ball of 10 millimeters-15 millimeters of diameters, and continuously grinding 1 hour-3 hours is emitted the slurry of must regrinding when the slurry median size reaches below 3 microns;
(4) the above-mentioned slurry of regrinding is sieved, strong magnetic deironing, carry out mist projection granulating then, get particle diameter and be 40 orders-120 purpose powder through pressure forming, obtain green article;
(5) described green article is placed combustion gas shuttle kiln or tunnel furnace, be warming up to 1300 ℃-1340 ℃, be incubated 1 hour-3 hours with 50 ℃-80 ℃ temperature rise rate per hour, high aluminum abrasion-resistant ceramic product in promptly getting after the cooling, this extrudate density is 3.25g/cm
3-3.45g/cm
3, abrasion loss hourly is less than 0.025%.
2. according to the described method of claim 1, it is characterized in that discarded aluminum oxide ceramic rod is that aluminum oxide quality ratio content is the ceramic rod of 65%-78% described in the step (1) with high aluminum abrasion-resistant ceramic product in the roller rod waste material preparation.
3. according to the described method of claim 1, it is characterized in that in the step (4), the pressure forming employing cold isostatic compaction that obtains green article is spherical goods, or is compressed to brick shape goods with punching block with high aluminum abrasion-resistant ceramic product in the roller rod waste material preparation; Compacting pressure is 60MPa-120MPa.
4. according to the described method of claim 3, it is characterized in that described isostatic cool pressing is static pressure methods such as static pressure such as dry type or wet type with high aluminum abrasion-resistant ceramic product in the roller rod waste material preparation.
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