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Assembly method for phosphorous pig iron casting cathode for aluminum electrolysis

A technology of phosphorus pig iron casting and assembly method, which is applied in the field of improvement of phosphorus pig iron casting cathode assembly method for aluminum electrolysis, and achieves the effects of saving time, significant economic benefits, and improving assembly efficiency and quality

Inactive Publication Date: 2018-06-29
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the shortcomings of the above-mentioned prior art, and to provide a method that can effectively solve the problem of filling and blocking the two ends of the dovetail groove of the carbon block with asbestos rope and other refractory materials when the cathode is pre-assembled, so as to realize rapid and effective assembly. , improve assembly efficiency and quality, and reduce the cathode voltage drop of the aluminum electrolysis phosphorus pig iron cast cathode assembly method

Method used

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  • Assembly method for phosphorous pig iron casting cathode for aluminum electrolysis
  • Assembly method for phosphorous pig iron casting cathode for aluminum electrolysis
  • Assembly method for phosphorous pig iron casting cathode for aluminum electrolysis

Examples

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Embodiment example 1

[0023] The assembly of the cathode carbon block group with double steel rods combined with the accompanying drawings figure 1 and figure 2 Description: According to the size of the dovetail groove of the cathode carbon block and the steel rod, the specific size of the "U"-shaped bracket is made: its width can not be changed due to the size of the steel rod and the dovetail groove of the cathode carbon block, take 20mm, the side wall thickness d0, and the distance between the side walls d. The size of the bottom thickness h0 and height h depends on the size of the dovetail groove of the assembled cathode carbon block and the size of the cathode steel rod. For example, the size of the end of the steel rod is 180*100mm 2 , the corresponding carbon block dovetail groove size is 195*110 (the narrowest point) mm 2 , then d0 is 4mm, d is 100mm, h0 is 15mm, and h is 180mm. according to figure 1 Process flow for assembly and casting: Pretreatment of steel rods and carbon block dove...

Embodiment example 2

[0025] The cathode carbon block assembly of a single steel rod is assembled as image 3 , the size of the "U"-shaped bracket: its width can not be changed due to the size of the steel rod and the dovetail slot of the cathode carbon block, take 20mm, and the dimensions of the side wall thickness d0, side wall spacing d, bottom thickness h0 and height h are based on the size of the cathode carbon The size of the end of the block dovetail groove and the size of the cathode steel rod are determined: for example, the size of the end of the steel rod is 280*200mm 2 , the corresponding carbon block dovetail groove size is 310*220mm 2 , then d0 is 8mm, d is 200mm, h0 is 30mm, and h is 280mm. according to figure 1 Process flow, pretreatment of steel rods and carbon block dovetail grooves - cleaning the oxide layer on the surface of steel rods, blowing out the dust inside the cathode carbon block dovetail grooves with compressed air; placing a special "U"-shaped bracket on the dovetai...

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Abstract

The invention relates to an assembly method for a phosphorous pig iron casting cathode for aluminum electrolysis. The assembly method is characterized in that in the assembly process, firstly, a same-material U-shaped support of a steel bar is placed at the end of a dovetail groove formed in a cathode carbon block, then a cathode steel bar is hoisted in to be in tight connection with the U-shapedsupport, and the cathode carbon block and the steel bar are preassembled; and the gap of the end of the dovetail groove and the U-shaped support is tamped by steel bar paste, then the preassembled cathode carbon block and steel bar are preheated, and molten phosphorous pig iron casting is conducted. Through the assembly method, assembly efficiency of the phosphorous pig iron casting cathode and casting quality of high-phosphorus pig iron are improved, the problem that preassembly quality is difficult to control due to the influence of human factors and the like when the dovetail groove gap between a carbon block and a steel bar is blocked with an asbestos cord and other refractory materials is solved, and the risk that the end of the carbon block generates a crack due to thermal stress impact during phosphorous pig iron casting is lowered. Cathode drop of aluminum electrolysis can be lowered effectively, energy consumption of aluminum electrolysis lowered, service life of the cathode is prolonged, and economic benefits are significant.

Description

technical field [0001] The invention relates to an assembly method of a phosphorus pig iron casting cathode for aluminum electrolysis, and relates to an improvement of an assembly method of a phosphorus pig iron casting cathode for aluminum electrolysis. Background technique [0002] The cathode for aluminum electrolysis is composed of carbon block and steel rod. There are three main methods of assembly: carbon paste tamping assembly: fill the gaps on both sides of the steel rod with steel rod paste, and then use pneumatic tools to tamp and compact it ; Phosphorus pig iron casting method: using melted phosphorus pig iron to cast the gap between them, and making them into one after condensation; bonding method: using a binder or carbon glue to bond the cathode carbon block and the steel rod together. And the first two methods are more common. The carbon paste tamping assembly is to heat the cathode carbon block, cathode steel rod and steel rod paste to a certain temperature ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/08B22D19/04
CPCC25C3/08B22D19/04
Inventor 张亚楠柴登鹏方斌王俊伟汪艳芳张芬萍白卫国
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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