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Method for preparing cold ramming paste for electrolytic aluminum

A technology for cold pounding and electrolysis of aluminum, applied in the field of aluminum electrolysis, can solve problems such as physical injury of construction workers and environmental pollution, and achieve the effects of reducing labor intensity, simple process, and improving physical and chemical properties.

Inactive Publication Date: 2011-04-13
KUNMING METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The construction temperature of the hot paste is above 100°C, and the harmful substances emitted during the construction will not only pollute the environment, but also cause certain harm to the body of the construction workers.

Method used

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  • Method for preparing cold ramming paste for electrolytic aluminum
  • Method for preparing cold ramming paste for electrolytic aluminum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Electric calcined anthracite with a carbon content of 95wt% is used as the aggregate raw material. The raw materials are crushed by a crusher, ball milled by a ball mill, and the aggregate is screened by a sieving machine to obtain an aggregate powder with a particle size of 150 μm; according to a weight ratio of 1:1:1, phenolic resin, furfural resin, and asphalt are weighed as viscose. The binder is melted. The electric calcined anthracite aggregate and the melted binder were sequentially introduced into a kneader according to a weight ratio of 5:1, and mixed and stirred for 1 hour, and the kneading temperature was 90°C. Then the kneaded material is poured into a molding machine for molding treatment to obtain a cold rammed product of a specified size.

[0017] Implementation results: the resistivity of the cold rammed product is 65μΩ·m, the compressive strength is 25MPa, and the bulk density is 1.5g / cm 3 . The product is capable of tamping operations at room temper...

Embodiment 2

[0019] Petroleum coke with a carbon content of 98wt% is used as the aggregate raw material. The raw materials are crushed by a crusher, ball milled by a ball mill, and the aggregate is screened by a sieving machine to obtain aggregate powder with a particle size of 250 μm; epoxy resin, furan resin, and coal tar are weighed according to a weight ratio of 1:2:1 Melted as a binder. The petroleum coke aggregate and the melted binder were successively introduced into the kneader according to the weight ratio of 8:1 and mixed and stirred for 5 hours, and the kneading temperature was 120°C. Then the kneaded material is poured into a molding machine for molding treatment to obtain a cold rammed product of a specified size.

[0020] Implementation results: the resistivity of the cold rammed product is 55μΩ·m, the compressive strength is 35MPa, and the bulk density is 1.8g / cm 3 . The product is capable of tamping operations at room temperature. All indicators can meet the requiremen...

Embodiment 3

[0022] A mixture of high-carbon graphite with a carbon content of 97 wt% and metallurgical coke is used as the aggregate raw material, and the weight ratio of the two is 2:1. The raw materials were crushed by a crusher, ball milled by a ball mill, and the aggregate was sieved by a sieving machine to obtain an aggregate powder with a particle size of 250 μm; according to a weight ratio of 2:1:1, phenolic resin, asphalt, and anthracene oil were weighed as viscous The binder is melted. The mixed aggregate and the melted binder are successively introduced into the kneader according to the weight ratio of 15:1 and mixed and stirred for 8 hours, and the kneading temperature is 180°C. Then the kneaded material is poured into a molding machine for molding treatment to obtain a cold rammed product of a specified size.

[0023] Implementation results: the resistivity of the cold rammed product is 57μΩ·m, the compressive strength is 32MPa, and the bulk density is 1.6g / cm 3 . The produ...

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Abstract

The invention discloses a method for preparing cold ramming paste for electrolytic aluminum. The method comprises the following steps of: crushing and ball-milling one or more mixed aggregates and feeding the aggregates into screening equipment to obtain aggregate powder with particle diameter of between 50 and 300 microns; meanwhile, heating and melting one or more mixed adhesives to obtain adhesive melt; then pouring the aggregate powder and the adhesive melt in a weight ratio of 5-20:1 into a kneading machine in sequence and uniformly mixing; keeping the kneading temperature to be between 80 and 200 DEG C and the kneading time to be between 1 and 18 hours; and taking the kneaded material out and guiding into a forming machine for forming to obtain a cold ramming paste product of a specified size, wherein the aggregates are one or a mixture of more of the normal calcined anthracite, electrically calcined anthracite, high-carbon graphite, metallurgical coke and petroleum coke; the carbon content of each aggregate is not less than 95 percent; and the adhesive is one or a mixture of more of phenolic resin, furfural resin, epoxy resin, furan resin, asphalt, coal tar and anthracene oil.

Description

Technical field: [0001] The invention relates to the technical field of aluminum electrolysis, in particular to a method for preparing cold stamping paste for electrolytic aluminum. Background technique [0002] The life of the aluminum electrolytic cell depends not only on the quality of the cell lining material and cell construction, but also on the cell firing, start-up and production operation methods. The so-called cathode in the aluminum process refers to carbon lining, cathode conductive rod, refractory material and thermal insulation material. Among them, the carbon lining is usually composed of cathode carbon block and cathode tamping paste (referred to as tamping paste). Both the cathode paste and the cathode carbon block are the masonry materials of the aluminum electrolytic cell, and are directly in contact with the high-temperature aluminum liquid and electrolyte, so it is required It has the same or similar properties as the cathode carbon block, such as low a...

Claims

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Application Information

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IPC IPC(8): C04B35/532C04B35/66C25C3/08
Inventor 谢刚田林周扬民李荣兴俞小花
Owner KUNMING METALLURGY INST
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