Rotary kiln hook nail arrangement method

Abstract

The invention relates to a rotary kiln, in particular to an arrangement method of a stainless steel hook nail in the inner lining casting of the rotary kiln for the carbon calcination of petroleum coke in the aluminum electrolysis industry, which comprises the following steps: 1) arrangement of hook nail structure; 2) winding of cloth tape; 3) the stainless steel hook nail of phi 14 is arranged within 10.5 meters between a secondary air nozzle and a tertiary air nozzle, and the longitudinal distance between the hook nails in a rotary kiln shell; 4) the stainless steel hook nail is welded on the rotary kiln shell according to the root towards the rotary kiln shell. The invention has the advantages of that the arrangement method of the rotary kiln hook nail of the invention effectively prolongs the service life the rotary kiln, saves a large amount of maintenance costs, and reduces the environmental pollution of the overhaul of the kiln inner lining and other industrial garbage. The invention is applied to the maintenance of the rotary kiln for the carbon calcination of petroleum coke in the aluminum electrolysis industry and the construction of the new kiln.

Description

technical field [0001] The invention relates to a rotary kiln, in particular to a method for arranging stainless steel hooks and nails in the pouring of the inner lining of the rotary kiln used for carbon calcining petroleum coke in the aluminum electrolysis industry. Background technique [0002] Used in pouring of rotary kiln lining for carbon calcination of petroleum coke in aluminum electrolysis industry, Φ14 stainless steel hook nails are arranged within 3 and a half meters behind the sixth tuyere, and Φ10 stainless steel hook nails are arranged in other parts; stainless steel hook nails and pouring The expansion of the material uses the cloth tape wrapped around the hook nails to form an expansion joint. After the cloth tape is wrapped, due to the construction one by one, it is easy for the construction personnel to tear off the cloth tape when entering and leaving the kiln. There is no expansion joint between the stainless steel hook nail and the castable. When the st...

AI Technical Summary

Problems solved by technology

[0002] Used in pouring of rotary kiln lining for carbon calcination of petroleum coke in aluminum electrolysis industry, Φ14 stainless steel hook nails are arranged within 3 and a half meters behind the sixth tuyere, and Φ10 stainless steel hook nails are arranged in other parts; stainless steel hook nails and pouring The expansion of the material uses the cloth tape wrapped around the hook nails to form an expansion joint. After the cloth tape is wrapped, due to the construction one by one, it is easy for the construction personnel to tear off the cloth tape when entering and leaving the kiln. There is no expansion joint between the stainless steel hook nail and the castable. When the stainless steel hook nails expand during operation, the expansion force destroys the structure of the lining castable, resulting in a loose structure of the lining castable, which affects the life of the kiln

The root size of the original stainless steel hook nails is 25mm. The stainless steel hook nails are fixed by welding the roots of the stainless steel hook nails on the rotary kiln barrel. During use, the Φ14 stainless steel hook nails and the Φ10 stainless steel hook nails are separated from each other due to mechanical vibration. The parts directly welded on the rotary kiln barrel fall off as a whole, which affects the falling off of the rotary kiln lining and affects the use of the rotary kiln

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