Graphite carbon cover and antioxidation dipping treatment method thereof

Abstract

The invention relates to the field of graphite carbon covers used for cold-rolled silicon steel, and in particular relates to a graphite carbon cover and an antioxidation dipping treatment method thereof. Petroleum coke, pitch coke and coal tar pitch are taken as raw materials, and the graphite carbon cover is characterized in that the petroleum coke and the pitch coke are taken as aggregate, the coal tar pitch is taken as the binding agent, grain size distribution of the aggregate in percent by weight is as follows: the aggregate with the grain size of 0.5-1mm accounts for 25% and the aggregate with the grain size below 0.5mm accounts for 75%, and the coal tar pitch accounts for 26-28% of the total weight of the aggregate. The graphite carbon cover is characterized in that a cover body of the graphite carbon cover is of a hollow tubular structure that the two ends of the cover body are thick and the middle part of the cover body is thin, a joint locking end of the cover body is provided with four slot holes which are uniformly distributed around the circumference, inner diameter of the joint locking end is more than that of the cover body, and the inner diameter of the cover body is more than that of a supporting end. Compared with the prior art, the graphite carbon cover disclosed by the invention has the advantages that the graphite carbon cover product has the characteristics of high mechanical strength, high density, low porosity and good elastic modulus and thermal conductivity, thermal stability and antioxidation performance indexes of the graphite carbon cover are all equivalent to or better than those of like imported products.

Description

technical field [0001] The invention relates to the field of graphite carbon sleeves for cold-rolled silicon steel, in particular to a graphite carbon sleeve and an anti-oxidation dipping treatment method thereof. Background technique [0002] Graphite carbon sleeve is an important component of the continuous annealing furnace for cold rolling silicon steel, and the continuous annealing furnace is one of the key equipment for silicon steel manufacturers. The working characteristics of this equipment are: the temperature in the furnace is high, generally up to 800-900°C, and the maximum temperature in the furnace of some manufacturers can reach 1100°C, and the furnace is filled with N 2 、H 2 、H 2 O and other mixed gases. The steel belt moves at a high speed of about 150m / min in the furnace. Therefore, stringent requirements are imposed on the quality of the rollers of the continuous annealing furnace. Because graphite materials have the characteristics of high mechanical...

AI Technical Summary

Problems solved by technology

[0004] The shape of the existing graphite carbon sleeves is thick in the middle, thin at both ends, and has open grooves at both ends. It has been found in long-term production practice; this graphite carbon sleeve has the following disadvantages; Difficult to match; 2) When the carbon sleeve is running at a linear speed of about 150m / min, noise and vibration are prone to occur, which will increase the wear of the graphite carbon sleeve slot and shorten the life of the graphite carbon sleeve

Images