Corundum self-flow material produced by using regenerated chrome corundum and preparation method thereof

Abstract

The invention discloses a corundum self-flow material produced by using regenerated chrome corundum and a preparation method thereof, and the corundum self-flow material comprises the following raw materials in parts by weight: aggregate: 30-70 parts of regenerated chrome corundum particles, 3-10 parts of corundum powder and 3-10 parts of alumina powder; the binding agent comprises the following components in parts by weight: 0.1-5 parts of magnesia powder, 0.1-2 parts of silicon powder and 0.1-10 parts of calcium aluminate powder; the additive comprises 0.1-1 part of a water reducing agent and 0.1-1 part of an anti-explosion agent, and is obtained by uniformly mixing the aggregate, the binding agent and the additive. According to the invention, the phenomenon of blow-by of the steel ladle is solved, the problems that the corundum self-flowing material is not resistant to erosion and has a poor protection effect on the periphery of the brick cup are solved, the production efficiency of a steel mill is improved, and the labor intensity is reduced; recycled materials are adopted for reprocessing, the cost is effectively reduced, and energy conservation and emission reduction are facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of refractory materials, and in particular to a self-flowing corundum material produced by using recycled chrome corundum and a preparation method thereof. Background Art

[0002] At present, the bottom of the ladle is built with aluminum-magnesium-carbon bricks, and the gaps between the aluminum-magnesium-carbon bricks and the nozzle seat bricks and the air-permeable seat bricks are mostly filled with corundum self-flowing materials. After high-temperature sintering, the corundum self-flowing materials are prone to shrinkage, resulting in gaps and peeling. As a result, after a period of use, molten steel can easily penetrate into the caulking, causing the seat bricks around to fail to protect the seat bricks, thus affecting the service life of the seat bricks and causing gas cross-talk. The ladle is forced to go offline, affecting production.

[0003] In order to solve the problem of gas leakage around the ladle seat bricks, it is necessary to develop a high-performance filler. Summary of the invention

[0004] The purpose of the present invention is to provide a self-flowing corundum material produced by using regenerated chrome corundum and a preparation method thereof in view of the deficiencies of the prior art.

[0005] To achieve the above object, the present invention is implemented by the following technical scheme: the following raw materials are included by weight: Aggregate: 30-70 parts of recycled chrome corundum particles, 3-10 parts of corundum powder, 3-10 parts of alumina powder; Binder: 0.1-5 parts of magnesia powder, 0.1-2 parts of silica powder, 0.1-10 parts of calcium aluminate powder; Additives: 0.1-1 part water reducing agent, 0.1-1 part explosion-proof agent.

[0006] The method for preparing the corundum self-flowing material described in the present invention comprises the following steps: 1. Select the recycled lightweight waste refractory materials, remove the slag attached to the recycled lightweight waste refractory materials, and crush and screen the selected recycled lightweight waste refractory materials for standby use; 2. Inspect the raw materials according to national standards, and then take corundum powder, alumina powder, binder and additives according to weight for use; 3. Stir and mix the above raw materials evenly to obtain the finished corundum self-flowing material.

[0007] The beneficial effects of the present invention are as follows: the gas cross-talk phenomenon of the ladle is solved, and at the same time, the problem of the corrosion resistance of the corundum self-flowing material and the poor protection effect on the surrounding of the seat bricks is solved, thereby improving the production efficiency of the steel plant and reducing labor intensity; recycled materials are used for reprocessing, which effectively reduces costs and is conducive to energy conservation and emission reduction. DETAILED DESCRIPTION

[0008] The present invention will be further described below in conjunction with the embodiments, but is not limited to the contents of the description.

[0009] A self-flowing corundum material produced by using recycled chrome corundum, comprising the following raw materials in parts by weight: Aggregate: 30-70 parts of recycled chrome corundum particles, 3-10 parts of corundum powder, 3-10 parts of alumina powder; Binder: 0.1-5 parts of magnesia powder, 0.1-2 parts of silica powder, 0.1-10 parts of calcium aluminate powder; Additives: 0.1-1 part water reducing agent, 0.1-1 part explosion-proof agent.

[0010] The particle size of the regenerated chrome corundum particles is 0.08 mm to 5 mm, the aluminum oxide content in the regenerated chrome corundum particles is 70 to 75% wt, the chromium oxide content is 12 to 13% wt, and the iron oxide content is 3 to 6% wt; the particle size of the corundum powder is 0.001 to 0.05 mm, and the aluminum oxide content in the corundum powder is not less than 95% wt; the particle size of the aluminum oxide powder is 0.001 to 0.020 mm.

[0011] The particle size of the magnesia powder is 0.001-0.05 mm, and the alumina content in the magnesia powder is not less than 95%wt; the particle size of the silicon powder is 0.001-0.005 mm, and the alumina content in the silicon powder is not less than 95%wt; the particle size of the calcium aluminate powder is 0.001-0.005 mm, and the alumina content in the calcium aluminate powder is not less than 70%wt.

[0012] The water reducing agent is a composite of any one or more of ADS3, ADW1 and sodium tripolyphosphate; the explosion-proof agent is a composite of any one or more of organic fiber, ceramic fiber and metal aluminum powder.

[0013] The additive also includes 0.1 to 1 part of titanium powder and / or 0.1 to 1 part of rare earth.

[0014] A method for preparing a self-flowing corundum material produced by using regenerated chrome corundum comprises the following steps: 1. Select the recycled lightweight waste refractory materials, remove the slag attached to the recycled lightweight waste refractory materials, and crush and screen the selected recycled lightweight waste refractory materials for standby use; 2. Inspect the raw materials according to national standards, and then take corundum powder, alumina powder, binder and additives according to weight for use; 3. Stir and mix the above raw materials evenly to obtain the finished corundum self-flowing material.

[0015] Example 1

[0016] A self-flowing corundum material produced by using recycled chrome corundum, comprising the following raw materials in parts by weight: Aggregate: 30 parts of recycled chrome corundum particles, the particle size of the recycled chrome corundum particles is 0.08mm~5 mm, the aluminum oxide content in the recycled chrome corundum particles is 70~75%wt, the chromium oxide content is 12~13%wt, and the iron oxide content is 3~6%wt; 3 parts of corundum powder, the particle size of the corundum powder is 0.001~0.05 mm, and the aluminum oxide content in the corundum powder is not less than 95%wt; 3 parts of aluminum oxide powder, the particle size of the aluminum oxide powder is 0.001~0.020 mm; Binder: 0.1 part of magnesia powder, the particle size of magnesia powder is 0.001~0.05mm, and the alumina content in magnesia powder is not less than 95%wt; 0.1 part of silica powder, the particle size of silica powder is 0.001~0.005 mm, and the alumina content in silica powder is not less than 95%wt; 0.1 part of calcium aluminate powder, the particle size of calcium aluminate powder is 0.001~0.005 mm, and the alumina content in calcium aluminate powder is not less than 70%wt; Additives: 0.1 parts of water reducing agent, which is a composite of any one or more of ADS3, ADW1, and sodium tripolyphosphate; 0.1 parts of explosion-proof agent, which is a composite of any one or more of organic fiber, ceramic fiber, and metal aluminum powder.

[0017] A method for preparing a self-flowing corundum material produced by using recycled chrome corundum: 1. Select the recycled lightweight waste refractory materials, remove the slag attached to the recycled lightweight waste refractory materials, and crush and screen the selected recycled lightweight waste refractory materials for standby use; 2. Inspect the raw materials according to national standards, and then take corundum powder, alumina powder, binder and additives according to weight for use; 3. Stir and mix the above raw materials evenly to obtain the finished product of corundum self-flowing material. The finished product of corundum self-flowing material is quantitatively packaged in moisture-proof inner film bags, 0.1 parts of titanium powder and 0.1 parts of rare earth.

[0018] Example 2

[0019] A self-flowing corundum material produced by using recycled chrome corundum, comprising the following raw materials in parts by weight: Aggregate: 50 parts of recycled chrome corundum particles, the particle size of the recycled chrome corundum particles is 0.08mm~5 mm, the aluminum oxide content in the recycled chrome corundum particles is 70~75%wt, the chromium oxide content is 12~13%wt, and the iron oxide content is 3~6%wt; 6 parts of corundum powder, the particle size of the corundum powder is 0.001~0.05 mm, and the aluminum oxide content in the corundum powder is not less than 95%wt; 6 parts of aluminum oxide powder, the particle size of the aluminum oxide powder is 0.001~0.020 mm; Binder: 3 parts of magnesia powder, the particle size of magnesia powder is 0.001~0.05mm, and the alumina content in magnesia powder is not less than 95%wt; 1 part of silica powder, the particle size of silica powder is 0.001~0.005 mm, and the alumina content in silica powder is not less than 95%wt; 5 parts of calcium aluminate powder, the particle size of calcium aluminate powder is 0.001~0.005 mm, and the alumina content in calcium aluminate powder is not less than 70%wt; Additives: 0.5 parts of water reducing agent, which is a composite of any one or more of ADS3, ADW1, and sodium tripolyphosphate; 0.5 parts of explosion-proof agent, which is a composite of any one or more of organic fiber, ceramic fiber, and metal aluminum powder; 0.5 parts of titanium powder and 0.5 parts of rare earth.

[0020] A method for preparing a self-flowing corundum material produced by using recycled chrome corundum: 1. Select the recycled lightweight waste refractory materials, remove the slag attached to the recycled lightweight waste refractory materials, and crush and screen the selected recycled lightweight waste refractory materials for standby use; 2. Inspect the raw materials according to national standards, and then take corundum powder, alumina powder, binder and additives according to weight for use; 3. Stir and mix the above raw materials evenly to obtain the finished product of corundum self-flowing material, and quantitatively pack the finished product of corundum self-flowing material in moisture-proof inner film bags.

[0021] Example 3

[0022] A self-flowing corundum material produced by using recycled chrome corundum, comprising the following raw materials in parts by weight: Aggregate: 70 parts of recycled chrome corundum particles, the particle size of the recycled chrome corundum particles is 0.08mm~5 mm, the aluminum oxide content in the recycled chrome corundum particles is 70~75%wt, the chromium oxide content is 12~13%wt, and the iron oxide content is 3~6%wt; 10 parts of corundum powder, the particle size of the corundum powder is 0.001~0.05 mm, and the aluminum oxide content in the corundum powder is not less than 95%wt; 10 parts of aluminum oxide powder, the particle size of the aluminum oxide powder is 0.001~0.020 mm; Binder: 5 parts of magnesia powder, the particle size of magnesia powder is 0.001~0.05mm, and the alumina content in magnesia powder is not less than 95%wt; 2 parts of silica powder, the particle size of silica powder is 0.001~0.005 mm, and the alumina content in silica powder is not less than 95%wt; 10 parts of calcium aluminate powder, the particle size of calcium aluminate powder is 0.001~0.005 mm, and the alumina content in calcium aluminate powder is not less than 70%wt; Additives: 1 part of water reducing agent, which is a composite of any one or more of ADS3, ADW1, and sodium tripolyphosphate; 1 part of explosion-proof agent, which is a composite of any one or more of organic fiber, ceramic fiber, and metal aluminum powder; 1 part of titanium powder and 1 part of rare earth.

[0023] A method for preparing a self-flowing corundum material produced by using recycled chrome corundum: 1. Select the recycled lightweight waste refractory materials, remove the slag attached to the recycled lightweight waste refractory materials, and crush and screen the selected recycled lightweight waste refractory materials for standby use; 2. Inspect the raw materials according to national standards, and then take corundum powder, alumina powder, binder and additives according to weight for use; 3. Stir and mix the above raw materials evenly to obtain the finished product of corundum self-flowing material, and quantitatively pack the finished product of corundum self-flowing material in moisture-proof inner film bags.

[0024] Experimental Example Take an appropriate amount of corundum self-flowing material prepared in any embodiment and pour it into a mixer, add 5-5.5 parts of water, stir for 2-3 minutes, take the ladle filler and pour it into the gaps around the aluminum-magnesium-carbon brick, the nozzle seat brick, and the air-permeable seat brick. According to the usage, the usage information of the corundum self-flowing material prepared in the embodiment and comparative examples 1-3 is recorded, and the results are shown in Table 1. It can be seen from Table 1 that the physical properties of the corundum self-flowing material prepared in the present application are better than those of the existing corundum self-flowing materials on the market, and the density, adhesion, thermal shock resistance, compressive strength and refractoriness are significantly improved, which effectively slows down the penetration of molten steel into the caulking and increases the service life of the seat bricks; therefore, the corundum self-flowing material prepared in the present application can replace the existing corundum self-flowing material as a refractory brick caulking material.

Claims

1. A self-flowing corundum material produced by using recycled chrome corundum, characterized in that , by weight, including the following raw materials: Aggregate: 30-70 parts of recycled chrome corundum particles, 3-10 parts of corundum powder, 3-10 parts of alumina powder; Binder: 0.1-5 parts of magnesia powder, 0.1-2 parts of silica powder, 0.1-10 parts of calcium aluminate powder; Additives: 0.1-1 part water reducing agent, 0.1-1 part explosion-proof agent.

2. The self-flowing corundum produced by using recycled chrome corundum according to claim 1, characterized in that: The particle size of the regenerated chrome corundum particles is 0.08 mm to 5 mm, the aluminum oxide content in the regenerated chrome corundum particles is 70 to 75% wt, the chromium oxide content is 12 to 13% wt, and the iron oxide content is 3 to 6% wt; the particle size of the corundum powder is 0.001 to 0.05 mm, and the aluminum oxide content in the corundum powder is not less than 95% wt; the particle size of the aluminum oxide powder is 0.001 to 0.020 mm.

3. The self-flowing corundum produced by using recycled chrome corundum according to claim 1, characterized in that: The particle size of the magnesia powder is 0.001-0.05 mm, and the alumina content in the magnesia powder is not less than 95%wt; the particle size of the silicon powder is 0.001-0.005 mm, and the alumina content in the silicon powder is not less than 95%wt; the particle size of the calcium aluminate powder is 0.001-0.005 mm, and the alumina content in the calcium aluminate powder is not less than 70%wt.

4. The self-flowing corundum produced by using recycled chrome corundum according to claim 1, characterized in that: The water reducing agent is a composite of any one or more of ADS3, ADW1 and sodium tripolyphosphate; the explosion-proof agent is a composite of any one or more of organic fiber, ceramic fiber and metal aluminum powder.

5. The self-flowing corundum produced by using recycled chrome corundum according to claim 1, characterized in that: The additive also includes 0.1 to 1 part of titanium powder and / or 0.1 to 1 part of rare earth.

6. The method for preparing a self-flowing corundum material produced by using regenerated chrome corundum according to any one of claims 1 to 5, characterized in that: The following steps are involved:

1. Select the recycled lightweight waste refractory materials, remove the slag attached to the recycled lightweight waste refractory materials, and crush and screen the selected recycled lightweight waste refractory materials for standby use; 2. Inspect the raw materials according to national standards, and then take corundum powder, alumina powder, binder and additives according to weight for use; 3. Stir and mix the above raw materials evenly to obtain the finished corundum self-flowing material.

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