Composite powder for improving scouring resistance of carbon-containing refractory material and preparation method of composite powder

A technology of composite powder and refractory materials, applied in the field of carbon-containing refractory materials, can solve the problems of reducing the ability to resist erosion and erosion of molten steel, difficulty in resisting erosion and penetration of molten steel, poor erosion and erosion resistance, etc., to achieve Improve anti-scouring performance, avoid volume shrinkage, and have strong anti-scouring ability

Active Publication Date: 2016-07-13
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Carbon-containing refractory materials are widely used in the continuous casting industrial process, among which the application of the three major parts of continuous casting is the most common. The structure is loose, and it is difficult to resist the erosion of molten steel and the penetration and erosion of molten slag. For this reason, antioxidants are introduced into carbon-containing refractories in large quantities. Current anti-oxidation additives generally contain boron, silicon and other substances, such as patent ZL200810011972.5 containing boron The oxidation products of antioxidants exist in liquid phase, and the oxidation products of silicon-containing antioxidants described in ZL200910066119.8 have poor erosion and erosion resistance
[0003] Zirconium carbide is a relatively common substance in carbide materials. It has many e

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0015] Example 1

[0016] Preparation of nano zirconia grade coated zirconium carbide composite powder:

[0017] 1) Preparation of slurry: put 166.5 grams of acrylamide and 33.3 grams of methylene bisacrylamide into a beaker containing 1110 grams of water to dissolve to obtain a premixed solution, pour it into a ball mill tank; respectively weigh 666 grams of zirconium carbide (200 mesh ), 1332 grams of nano zirconia (particle size is less than 30nm, yttrium oxide is partly stable) zirconia, using zirconia balls as grinding balls, ball milled for 20 hours, and then made into slurry;

[0018] 2) Forming and drying: Add 1.7 grams of initiator ammonium persulfate and 0.8 grams of catalyst tetramethylethylenediamine to the slurry in step 1); inject into the forming mold at 30°C and 80%RH humidity The gel is solidified and formed; after solidification, the mold is removed to obtain the green body, the green body is placed in a constant temperature and humidity box, and the green body is ...

Example Embodiment

[0020] Implementation case 2

[0021] Preparation of nano-zirconia-coated zirconium carbide composite powder: 1) Prepare slurry: Put 220 grams of acrylamide and 55.0 grams of methylene bisacrylamide into a beaker containing 1100 grams of water to dissolve to obtain a premixed liquid, and pour it into a ball mill tank Medium; Weigh 2597 grams of zirconium carbide powder (400 mesh), 5195 grams of nano zirconia (particle size less than 30nm, magnesium oxide partly stable), using zirconia balls as grinding balls, and milling them for 20 hours to prepare slurry. 2) Shaping and drying: Add 6.6 grams of initiator ammonium persulfate and 4.4 grams of catalyst tetramethylethylenediamine to the slurry in step 1. It is injected into the molding mold and gel-cured and molded at 30°C and 80%RH humidity. After solidification, the mold is removed to obtain the green body. The green body is placed in a constant temperature and humidity box and dried at a temperature of 25°C and a humidity of 90...

Example Embodiment

[0023] Implementation case 3

[0024] Preparation of nano-zirconia-coated zirconium carbide composite powder: 1) Prepare slurry: put 195 grams of acrylamide and 43.0 grams of methylene bisacrylamide into a beaker containing 1084 grams of water to dissolve to obtain a premixed liquid, and pour it into a ball mill tank Medium; Weigh 1542 grams of zirconium carbide (325 mesh), 1542 grams of nano zirconia (particle size less than 30nm, calcium oxide partly stable), using alumina balls as grinding balls, ball milling for 20 hours, and make slurry. 2) Forming and drying: Add 3.9 grams of initiator ammonium persulfate and 2.0 grams of catalyst tetramethylethylenediamine to the slurry of step 1. It is injected into the molding mold and gel-cured and molded at 30°C and 80%RH humidity. After solidification, the mold is removed to obtain the green body. The green body is placed in a constant temperature and humidity box and dried at a temperature of 25°C and a humidity of 90%. Then the gre...

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PUM

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Abstract

The invention belongs to the technical field of preparation of carbon-containing refractory material, and mainly relates to composite powder for improving scouring resistance of a carbon-containing refractory material and a preparation method of the composite powder. The provided composite powder for improving the scouring resistance of the carbon-containing refractory material is compounded from zirconium carbide particles and nano zirconium oxide, wherein the mass ratio of the nano zirconium oxide to the zirconium carbide particles in the composite powder is 0.5:1 to 1:0.5; the particle size of the zirconium carbide particles is 200-400 meshes, and the zirconium carbide particles are positioned in the center of the composite powder; the nano zirconium oxide is part of stable zirconium oxide of which the particle size is less than 30nm; the nano zirconium oxide is uniformly dispersed and is enwrapped on the outer surface of the zirconium carbide particles; and the particle size of the composite powder is between 80 meshes and 150 meshes. The composite powder provided by the invention ensures that zirconium oxide has strong adhesive force on the surface of zirconium carbide, and meanwhile, and the composite powder is crushed after drying to obtain an appropriate particle size, and finally obtain the nano zirconium oxide coated zirconium carbide composite powder.

Description

technical field [0001] The invention belongs to the technical field of preparation of carbon-containing refractory materials, and mainly relates to a composite powder for improving the anti-scouring performance of carbon-containing refractory materials and a preparation method thereof. Background technique [0002] Carbon-containing refractory materials are widely used in the continuous casting industrial process, among which the application of the three major parts of continuous casting is the most common. The structure is loose, and it is difficult to resist the erosion of molten steel and the penetration and erosion of molten slag. For this reason, antioxidants are introduced into carbon-containing refractories in large quantities. Current anti-oxidation additives generally contain boron, silicon and other substances, such as patent ZL200810011972.5 containing boron The oxidation products of antioxidants exist in liquid phase, and the oxidation products of silicon-contain...

Claims

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Application Information

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IPC IPC(8): C04B35/628C04B35/66C04B35/10C04B35/443
CPCC04B35/10C04B35/443C04B35/62831C04B35/66C04B2235/3246C04B2235/425C04B2235/5427C04B2235/96
Inventor 钱凡李红霞刘国齐杨文刚于建宾马谓奎王刚
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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