Method for preparing fire-proof material from the carbon chromium residue or titanium residue of metallurgy furnace

A technology for metallurgical slag and refractory materials, which is applied in the field of preparing refractory materials, can solve the problems of long curing time, cumbersome process, poor thermal shock resistance and medium temperature strength, and achieves rapid and controllable curing, high green body strength, and easy removal. mod effect

Inactive Publication Date: 2012-07-18
LIAONING UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional refractory molding generally adopts the slurry casting method, which has defects such as long curing time, uneven composition, easy deformation and cracking, etc.
Using water glass as a binder has low high-temperature strength and large deformation; using ethyl silicate as a binder has cumbe

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1.1. Crush the carbon chromium slag into a ball mill, take 850 g of carbon chromium slag powder, 80 g of talc, and 70 g of aluminum fluoride passed through a 100-mesh standard sieve, and ball-mix until 1000 g of uniform powder is used as a mixed powder for later use.

[0036] 1.2. According to the ratio of 300m of silica sol for 1000g of mixed powder, 300ml of silica sol for 1000g of mixed powder. According to the ratio of 1.2g potassium nitrite for 100ml silica sol, 3.6g potassium nitrite for 300ml silica sol.

[0037] 1.3. Dissolve 3.6g of potassium nitrite in 36ml of water at 50-100°C; then mix with 300ml of silica sol and stir for 1-2min to make mixed solution A.

[0038] 1.4. Inject the mixed solution A into 1000 g of the mixed powder, and stir continuously for 10 minutes to make a slurry.

[0039] 1.5. Inject the slurry into the mold, let it dry naturally for 0.5h and demould.

[0040] 1.6. After demoulding, the green body is dried naturally for 24 hours, heated...

Embodiment 2

[0042] 2.1. Crush the carbon chromium slag into a ball mill, take 9.5kg of carbon chromium slag powder, 0.3kg of talc, and 0.2kg of aluminum fluoride passed through a 100-mesh standard sieve, and ball-mix until 10kg of uniform powder is used as a mixed powder for later use.

[0043] 2.2. According to the ratio of 1000g mixed powder to take 400ml of silica sol, 10kg of mixed powder to take 4000ml of silica sol; according to the ratio of 100ml of silica sol to take 0.9g of potassium nitrite, take 36g of potassium nitrite.

[0044] 2.3. Dissolve 36g of potassium nitrite in 360ml of water at 50-100°C, then mix with 4000ml of silica sol and stir for 1-2min to make mixed solution A.

[0045] 2.4. Pour mixed solution A into 10kg of mixed powder, and stir continuously for 10 minutes to make a slurry.

[0046] 2.5. Pour the slurry into the mold, let it dry naturally for 2 hours, and demould it.

[0047] 2.6. After demoulding, the green body is dried naturally for 36 hours, heated with...

Embodiment 3

[0049] 3.1. Crush the carbon chromium slag into a ball mill, take 900g of carbon chromium slag powder passed through a 100-mesh standard sieve, 50g of talc, and 50g of aluminum fluoride, and ball-mix until 1000g of uniform powder is used as a mixed powder for later use.

[0050] 3.2. Take 350ml of silica sol according to the ratio of 1000g of mixed powder to 350ml of silica sol. According to the ratio of 100ml of silica sol to 1g of potassium nitrite, 3.5g of potassium nitrite is taken.

[0051] 3.3. Dissolve 3.5g of potassium nitrite in 50ml of water at 50-100°C; then mix with 350ml of silica sol and stir for 1-2min to make mixed solution A.

[0052] 3.4. Pour mixed solution A into 1000g mixed powder, and stir continuously for 10 minutes to make a slurry.

[0053] 3.5. Pour the slurry into the mold, let it dry naturally for 1.5 hours, and demould it.

[0054] 3.6. After demoulding, the green body is dried naturally for 30 hours, heated with the furnace at an average heating r...

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PUM

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Abstract

The invention discloses a method for preparing a fire-proof material from carbon chromium residue or titanium residue of a metallurgy furnace, comprising the following steps of: (a) crushing and ball-milling the carbon chromium residue and the titanium residue respectively to pass through a standard sieve more than 100 meshes; (b) proportioning the carbon chromium residue, talc and aluminum fluoride in parts by mass and ball-milling to obtain uniform powder which is used as mixed powder A for later use; or proportioning the titanium residue, the talc and the aluminum fluoride in parts by massand ball-milling to obtain uniform powder which is used as mixed powder B for later use; (c) adding silica sol and potassium nitrite to prepare slurry; and (d) pouring the slurry to a mould for drying and sintering to prepare the fire-proof material. By adopting the method, harm of environment pollution of the carbon chromium residue and the titanium residue is eliminated and comprehensive utilization of residues of the metallurgy furnace is realized by transformation of high valence chromium to low valence chromium by high-temperature sintering and overall solidification.

Description

technical field [0001] The invention relates to a method for preparing a refractory material by using metallurgical slag carbon chromium slag or titanium slag. Background technique [0002] The traditional refractory molding generally adopts the slurry casting molding method, which has defects such as long curing time, uneven composition, and easy deformation and cracking. Using water glass as a binder has low high-temperature strength and large deformation; using ethyl silicate as a binder has cumbersome processes, pollutes the environment, and high production costs; using cement as a binder has poor fluidity, thermal shock resistance and medium temperature Poor strength. Metallurgical slag-like carbon chromium slag and titanium slag pollute the environment, occupy land, and endanger human health. Contents of the invention [0003] The purpose of the present invention is to solve the above-mentioned existing problems, and provide a solution that can solve the environmen...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 穆柏春李强于景媛
Owner LIAONING UNIVERSITY OF TECHNOLOGY
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