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Preparation method of mullite ceramic glazed composite large brick for chlorination furnace

A technology of mullite and chlorination furnace, which is applied in the field of preparation of surface glazing in thermal kiln drying process. The effect of alleviating the energy crisis and reducing the apparent porosity

Active Publication Date: 2013-05-08
REFRACTORY MATERIAL OF SINOSTEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production technology of titanium dioxide by chloride method is difficult, and the structure of key equipment is complex. It is still monopolized by a few foreign companies

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Step 1, large refractory bricks and fine glaze powder are produced and prepared according to the above process formula.

[0024] Step 2. Weigh the mixed material according to the weight requirement and pour it into the pre-assembled mold for high pressure molding;

[0025] Step 3. After forming, measure according to the size requirements of the adobe, and test the indicators of the adobe in time;

[0026] Step 4. Put the shaped bricks into the dryer for drying, the drying temperature is normal temperature -220°C, and the drying time is more than 25 hours;

[0027] Step 5. After the heat preservation is over, gradually lower the temperature for 4-10 hours, and come out of the oven after hardening.

[0028] Temperature range (°C) time (hours) 25~200 8 200 6 200~600 20 600 10 600~1410 34 1410 8

[0029]

[0030] Step 7, laying the fired bricks in the chlorination furna...

Embodiment 2

[0036] Step 1, large refractory bricks and fine glaze powder are produced and prepared according to the above process formula.

[0037] Step 2. Weigh the mixed material according to the weight requirement and pour it into the pre-assembled mold for high pressure molding;

[0038] Step 3. After forming, measure according to the size requirements of the adobe, and test the indicators of the embryo body in time;

[0039] Step 4. Put the shaped bricks into the dryer for drying, the drying temperature is normal temperature -220°C, and the drying time is more than 25 hours;

[0040] Step 5. After the heat preservation is over, gradually lower the temperature for 4-10 hours, and come out of the oven after hardening.

[0041] Temperature range (°C) time (hours) 25~200 8 200 6 200~600 20 600 10 600~1410 34 1410 8

[0042]

[0043] Step 7, laying the fired bricks in the chlorination...

Embodiment 3

[0049] Step 1, large refractory bricks and fine glaze powder are produced and prepared according to the above process formula.

[0050] Step 2. Weigh the mixed material according to the weight requirement and pour it into the pre-assembled mold for high pressure molding;

[0051] Step 3. After forming, measure according to the size requirements of the adobe, and test the indicators of the embryo body in time;

[0052] Step 4. Put the shaped bricks into the dryer for drying, the drying temperature is normal temperature -220°C, and the drying time is more than 25 hours;

[0053] Step 5. After the heat preservation is over, gradually lower the temperature for 4-10 hours, and come out of the oven after hardening.

[0054] Temperature range (°C) time (hours) 25~200 8 200 6 200~600 20 600 10 600~1410 34 1410 8

[0055]

[0056] Step 7, laying the fired bricks in the chlorination...

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Abstract

The invention discloses a preparation method for producing a mullite ceramic glazed composite refractory material for a lining of a medium-and-high-temperature chlorination furnace from titanium white through a chlorination method. The preparation method comprises the following steps: in a production unit, manufacturing a refractory brick; in a refractory production enterprise, proportioning and mixing to obtain glaze fine powder; and in a titanium white production enterprise, laying the refractory brick on a chlorination furnace by a furnace building construction unit, coating the glaze mixed solution onto the surface of the brick through a manual spreading manner or an equipment spraying manner to form a low-temperature-glazed high-temperature glaze of 2-5 mm, and forming a high-temperature-glazed layer which has a thickness of 1-3 mm and can resist the corrosion of chlorine gas, titanium tetrachloride and strong acid on the surface of the brick in the subsequent furnace drying process, thus avoiding the leakage and corrosion of high-temperature chlorine gas, high-temperature titanium tetrachloride, strong acid and chlorinated impurities.

Description

technical field [0001] The invention relates to a preparation method of a mullite ceramic glazed composite refractory material used in the lining of a high-temperature chlorination furnace in the production of titanium dioxide by the chlorination method, in particular to a method for spraying raw glaze on the upper surface of the brick body, and following the thermal kiln Process for the preparation of surface glazing in a furnace oven process. Background technique [0002] my country's titanium dioxide production technology is backward, and the domestic titanium dioxide industry is still the sulfur-titanium dioxide method with small scale, low output, high cost, unstable product quality and serious environmental pollution. Compared with the production of sulfuric acid titanium dioxide, the chlorination method has the advantages of short process flow, easy operation to realize continuous automation, less discharge of "three wastes", and easier access to high-quality rutile t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/185C04B41/86
Inventor 张利新薄钧李宏伟廖绍虎王贻谦王卓
Owner REFRACTORY MATERIAL OF SINOSTEEL CORP
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