A method for preparing oxidation furnace outlet pipe scar remover by dry pressing of titanium dioxide

An outlet pipeline and dry tableting technology, which are applied in the methods of granulating raw materials, chemical instruments and methods, lighting and heating equipment, etc., can solve the problem of affecting the coating effect of semi-finished titanium dioxide and the inability to discharge high-chloride waste water to meet environmental protection standards. , the increase in the cost of high chloride wastewater treatment, etc., to achieve the effect of improving the dispersion effect, increasing the strength and improving the effect.

Active Publication Date: 2019-03-22
中信钛业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the rock salt and materials are washed and separated in the post-treatment process, the high-chloride wastewater produced by the rock salt cannot be discharged up to environmental protection standards, and the cost of high-chloride wastewater treatment increases, which intensifies the pressure on environmental protection production
Moreover, due to the salt effect in the post-treatment and dispersion process of titanium dioxide, it will also affect the dispersion effect of the process product and the coating effect of the titanium dioxide semi-finished product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Use a mixer to mix 100kg of rutile titanium dioxide and 10kg of low-substituted hydroxypropyl cellulose evenly to obtain a mixed material. The mixed material is transported to the hopper of a high-speed rotary tablet press, and the high-speed rotary tablet press is started for dry tableting. Firstly, pre-tabletting is carried out under a pre-pressure of 10 KN-20KN, and after the tablet is formed, it is pressed under a main pressure of 20 KN-50KN to obtain a scar remover for the outlet pipe of the oxidation furnace with a particle size of 15mm and a thickness of 10mm. The product The film forming rate is 100%.

[0015] Use 0.4Mpa nitrogen to transport the titanium dioxide pellets in the storage tank to the cooling conduit through the rotary feeding valve, and the 100kg / h titanium dioxide pellets will flow forward with the mixed air flow, and the titanium dioxide pellets will continuously wash the wall of the cooling conduit Adhesive scarred materials, after the scarred m...

Embodiment 2

[0017] Use a mixer to mix 100kg of rutile titanium dioxide and 1kg of low-substituted hydroxypropyl cellulose evenly to obtain a mixed material, which is transported to the hopper of a high-speed rotary tablet press, and the high-speed rotary tablet press is started for dry tableting. The pre-pressure of the high-speed rotary tablet press is 10 KN, and the main pressure is 20 KN, so that the oxidation furnace outlet pipe scar remover with a particle size of 6 mm and a thickness of 10 mm is obtained.

[0018] Use 0.4Mpa nitrogen to transport the titanium dioxide pellets in the storage tank to the cooling conduit through the rotary feeding valve, and the 100kg / h titanium dioxide pellets will flow forward with the mixed air flow, and the titanium dioxide pellets will continuously wash the wall of the cooling conduit Adhesive scarred materials, after the scarred materials are removed, the heat transfer efficiency of the cooling duct is improved, and the materials can be cooled norm...

Embodiment 3

[0020] Use a mixer to mix 100kg of rutile titanium dioxide and 5kg of low-substituted hydroxypropyl cellulose evenly to obtain a mixed material, which is transported to the hopper of a high-speed rotary tablet press, and the high-speed rotary tablet press is started for dry tableting. The pre-pressure of the high-speed rotary tablet press is 15KN, the main pressure is 35KN, and the oxidation furnace outlet pipe scar remover with a particle size of 8mm and a thickness of 10mm is obtained, and the product tableting rate is 100%.

[0021] Use 0.4Mpa nitrogen to transport the titanium dioxide pellets in the storage tank to the cooling conduit through the rotary feeding valve, and the 100kg / h titanium dioxide pellets will flow forward with the mixed air flow, and the titanium dioxide pellets will continuously wash the wall of the cooling conduit Adhesive scarred materials, after the scarred materials are removed, the heat transfer efficiency of the cooling pipe is improved, the mate...

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PUM

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Abstract

The invention provides a method for preparing a scab removal agent on an outlet pipeline of an oxidizing furnace by dry flaking of titanium dioxide. The method comprises the following steps of uniformly mixing rutile titanium dioxide with low-substituted hydroxypropyl cellulose by a mixing machine to obtain a mixed material, and conveying the mixed material to a loading hopper of a high-speed rotary tablet press to obtain the scab removal agent on the outlet pipeline of the oxidizing furnace. The method has the advantages that the production cost is low, the method is easy to operate, the scab removal agent can remove scabs on the outlet pipe of the oxidizing furnace, the heat exchange efficiency of a cooling guide pipe is improved, and normal cooling of the product is ensured during the production process, so that the condition that the temperature of the material entering the inlet of a bag filter meets the molten salt chlorination process control requirement is ensured.

Description

technical field [0001] The invention relates to the technical field of titanium dioxide production by chlorination, in particular to a method for preparing a scar remover for the outlet pipeline of an oxidation furnace by dry pressing of titanium dioxide, and the scar remover can replace rock salt to remove scar and lower the temperature of the outlet pipeline of the oxidation furnace . Background technique [0002] In the oxidation process of the molten salt chlorination titanium dioxide production process in the oxidation furnace, scabs are formed on the outlet pipe of the oxidation furnace. The original design uses rock salt to remove the scars and cool down. The rock salt is used to wash the inner wall of the cooling duct at the outlet of the oxidation furnace. After the material adhering to the inner wall of the cooling duct is removed by the rock salt, the heat exchange effect of the cooling duct is improved, and the outlet temperature of the bag filter is guaranteed t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28G13/00B01J2/00
CPCB01J2/00F28G13/00
Inventor 臧颖波秦树强朱德坤吴琼赵庆宇陈萍姚亮卿阳李俊强贺睿华
Owner 中信钛业股份有限公司
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