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Preparation method of furnace bottom roller graphite carbon sleeve impregnating solution

A technology of dipping liquid and graphite carbon, which is applied to the preparation of impregnating liquid for furnace bottom roller graphite carbon sleeves and the field of impregnation treatment of graphite carbon sleeves, can solve problems such as intractability, achieve the effects of convenient operation, reduce corrosion and facilitate industrial implementation.

Active Publication Date: 2011-09-07
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing the impregnating liquid of the graphite carbon sleeve of the hearth roll, which solves the problem that the existing graphite carbon sleeve treatment technology of the hearth roll is difficult to handle in the high temperature application stage, and achieves the purpose of facilitating industrial implementation and reducing the production cost of the enterprise

Method used

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  • Preparation method of furnace bottom roller graphite carbon sleeve impregnating solution
  • Preparation method of furnace bottom roller graphite carbon sleeve impregnating solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Take by weighing in the following ratio: 25wt% sodium tripolyphosphate, 25wt% sodium hexametapolyphosphate, 15wt% B 2 o 3 , 10wt% SiO 2 , 10wt% ZrO 2 , 10wt%TiO 2 , 4.5wt% MgO, 0.25wt% cerium nitrate, 0.25wt% gadolinium nitrate, mixed ball mill for 2 hours; the mixed powder was dissolved in 70°C water, wherein the total mass of the powder accounted for 5wt% of the total mass of the liquid, and stirred for 10 minutes; 0.5 wt% of the total mass of the mixed powder is weighed out of carboxymethyl cellulose, mixed into the above liquid, and stirred for 20 minutes until the liquid is clear to form an impregnating liquid.

[0016] Heat the graphite product 2 to 300°C, immerse it in the impregnating device 3 filled with the impregnating liquid while it is hot, adjust the temperature of the impregnating device 3 to 100°C, and the pressure to 0.6MPa, impregnate for 24 hours, take it out and dry it naturally.

Embodiment 2

[0018] Take by weighing in the following ratio: 20wt% sodium pyrophosphate, 30wt% sodium hexametapolyphosphate, 15wt% B 2 o 3 , 10wt% Al 2 o 3 , 10wt% ZrO 2 , 10wt%TiO 2 , 4.5wt% MgO, 0.5wt% lanthanum chloride, mixed ball mill for 2 hours; the mixed powder was dissolved in 80°C water, wherein the total mass of the powder accounted for 6wt% of the total mass of the liquid, and stirred for 10 minutes; 1 wt% starch by mass is mixed into the above liquid, and stirred for 20 minutes until the liquid is clear to form a dipping liquid.

[0019] Heat the graphite product 2 to 400°C, immerse it in the impregnating device 3 filled with the impregnating liquid while it is still hot, adjust the temperature of the impregnating device 3 to 95°C, and the pressure to 0.5 MPa, immerse it for 20 hours, take it out and dry it naturally.

Embodiment 3

[0021] Weigh according to the following ratio: 35wt% sodium tripolyphosphate, 20wt% potassium tetrapolyphosphate, 10wt% B 2 o 3 , 10wt% SiO 2 , 10wt% ZrO 2 , 10wt%TiO 2 , 4.5wt% NiO, 0.5wt% cerium oxide, mixed and ball milled for 2 hours; the mixed powder was dissolved in water at 80°C, wherein the total mass of the powder accounted for 8wt% of the total mass of the liquid, and stirred for 10 minutes; according to the total mass of the mixed powder 0.5wt% of the citric acid was weighed, mixed into the liquid, and stirred for 20 minutes until the liquid became clear to form an impregnating liquid.

[0022] Heat the graphite product 2 to 500°C, immerse it in the impregnating device 3 filled with impregnating liquid while it is still hot, adjust the temperature of the impregnating device 3 to 105°C, and the pressure to 0.4MPa, immerse for 30 hours, take it out and dry it naturally.

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Abstract

The invention relates to a preparation method of a furnace bottom roller graphite carbon sleeve impregnating solution, belonging to the technical field of graphite carbon product processing. Raw materials include water, polyphosphate, polymetaphosphate, inorganic additives, active additives, dispersing agents and trace additives. When in use, a graphite product (2) is heated to reach 300-500 DEG C, and the heated graphite product (2) is impregnated into an impregnating solution inside a pressurized impregnating device (3) for 18-30 hours at the temperature of 70-120 DEG C and the pressure of 0.4-0.6 MPa while the graphite product (2) is hot. The invention has the advantages of simple process and convenience for operation and is beneficial to the industrial implementation.

Description

technical field [0001] The invention belongs to the technical field of graphite carbon product treatment, and in particular relates to a method for preparing an impregnating solution for a hearth roller graphite carbon sleeve. It is mainly used for the impregnation treatment of graphite carbon sleeves used in continuous annealing furnaces for cold-rolled silicon steel sheets and other heat treatment furnaces. Background technique [0002] Silicon steel products are very popular in the market and are in great demand. The continuous annealing furnace for cold-rolled silicon steel sheet is one of the key equipment for silicon steel production. Its function is to decarburize the steel strip at high temperature. 2 、H 2 Corrosion of O and other oxidizing gases leads to defects such as loose graphite carbon sleeve surface structure, reduced surface hardness and strength, and graphite carbon sleeve nodules. The service life of the graphite roller is extremely short in the high te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/50
Inventor 叶树峰仉小猛邓亚利魏连启徐海卫陈运法
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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