Production method of electrically melt yttrium oxide stabilized zirconia granulation powder

A technology for stabilizing zirconia and production methods, applied in zirconia and other directions, to achieve the effects of less consumption, narrow distribution, and less false balls

Inactive Publication Date: 2012-01-25
王必庆
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to overcome the deficiencies of the existing stable zirconia varieties, and provide a method for preparing low-cost, high-performance and environment-friendly fused yttria-stabilized zirconia granulated powder using yttrium-zirconium powder as raw material

Method used

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  • Production method of electrically melt yttrium oxide stabilized zirconia granulation powder

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Experimental program
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Effect test

Embodiment 1

[0048] Get 200Kg yttrium-zirconium powder and 60 mesh 456Kg zircon sand (produced in Australia, ZrO 2 ≥66% the same below), 50-mesh 48.0Kg carbon powder is sprayed with 5 liters of soft water and mixed, put into the DC electric arc furnace in batches, the bottom of the furnace is paved with 50mm high arc-starting carbon blocks, and the hydraulic, water-cooled, and bottom-anode cooling systems are turned on to start The air compressor sends compressed air pulses to beat the bag dust storage, turn on the cyclone separator, and start the induced draft fan of the silicon powder recovery system. Above 1700°C, add the remaining material through the vibrating feeder, smelt for 4.0-4.5 hours to desiliconize, adjust the voltage to 50 volts, the current to 9000 amperes, and the temperature to 2800°C, and refine for about half an hour until all the compound silicon escapes. Lift the electrode, cover the furnace cover, hoist the furnace out of the furnace, cool, crush the melt in the grap...

Embodiment 2

[0050] Take 200Kg yttrium-zirconium powder, 60-mesh 456Kg zircon sand, 50-mesh 52Kg carbon powder, spray 5 liters of soft water and mix them evenly, and put them into the DC electric arc furnace in batches. Anode cooling system, start the air compressor to send compressed air pulses to beat the bag dust storage, turn on the cyclone separator, start the induced draft fan of the silicon powder recovery system, after everything is normal, feed the submerged arc electrofusion, the arc starting voltage is 100 volts, and the current is 2000 Ampere, control the temperature above 1700°C, add the remaining material through the vibrating feeder, smelt for 4.0-4.5 hours to desiliconize, adjust the voltage to 50 volts, the current to 9000 amps, and the temperature to 2800°C, refining for about half an hour until all the compounded silicon escapes until. Lift the electrode, cover the furnace cover, hoist the furnace out of the furnace, cool, crush the melt in the graphite pool, use a jaw c...

Embodiment 3

[0052] Mix 250Kg of yttrium-zirconium powder with 375Kg of 325-mesh monoclinic zirconia including fused monoclinic zirconia, put them into a DC electric arc furnace in batches, and lay a 50mm-high arc-starting carbon block on the bottom of the furnace. Turn on the hydraulic pressure, water cooling, and bottom anode cooling system. After everything is normal, feed the submerged arc electric melting, the arc starting voltage is 100 volts, the current is 2000 amperes, and the temperature is controlled above 1700 ° C. After feeding the rest of the material through the vibrating feeder, smelting for 1 hour , adjust the voltage to 50 volts, current to 9000 amps, temperature to 2800°C, refining for 10--20 minutes, lifting the electrode, hoisting the furnace out of the furnace, cooling and crushing the melt in the graphite pool, and crushing the frit to 25mm with a jaw crusher Then, it will be crushed to less than 2mm by a roller crusher, and the sieve below 1mm will be collected by a ...

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Abstract

The invention discloses a production method of electrically melt yttrium oxide stabilized zirconia granulation powder which is profitable, green and environmentally friendly. The method comprises the following steps: adding zircon sand and Y-doped cubic zirconia powder (or Y-Zr powder) in reducing agent for mixing and electric smelting or directly adding baddeleyite for mixing and electric smelting, cooling, performing coarse crushing and fine crushing, screening, performing coarse grinding and fine grinding, performing wet grinding to generate pulp, performing surface modification, performing spray granulation, mixing evenly and packaging. The method of the invention uses Y-Zr powder as raw material, the technical process is simple and easy, the method does not discharge waste water, waste gas and waste residue; the equipment investment is less, the product quality meets user requirements, the production process does not adopt secondary electric smelting and high-temperature heat treatment and add stabilizing agent; and under the same conditions, compared with the stabilized Zr and granulation powder thereof which are produced by the current and popular technology, the granulation powder quality is higher, the performance is better and the cost is reduced by 30-40%.

Description

technical field [0001] The invention relates to a method for preparing high-profit, green, pollution-free and stable zirconia granulated powder, in particular, an environmentally friendly fused yttrium oxide stabilized A production method of zirconia granulated powder. Background technique [0002] Fused zirconia is a national "Eighth Five-Year Plan" research project, and fused stable zirconia granulated powder is a deep-processed product of fused zirconia; the development and utilization of yttrium-zirconium powder, a scientific research project, was approved by the Ministry of Science and Technology in 1997 Lixiang research, fund project code: 97-D100. The present invention combines these two national-level scientific research projects into one, and opens up a new direction in China's synthetic materials. [0003] As we all know, zirconia is polycrystalline, and the zirconium oxygen atoms are arranged differently at different critical temperatures. At the critical phase ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G25/02C04B35/626C04B35/48
Inventor 王必庆
Owner 王必庆
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