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Filler material for furnace of baking powder of charcoal

A carbon roasting furnace and filling material technology, which is applied in the field of filling materials for carbon roasting furnaces, can solve the problems of wasting high-quality petroleum coke resources, and increasing the production cost of cathode and anode by filling coke, and achieves easy industrial implementation, reduced roasting cost, and is not easy to be crushed. Effect

Active Publication Date: 2007-11-14
河南华慧有色工程设计有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oxidation loss of filling coke not only increases the production cost of cathode and anode, but also wastes high-quality petroleum coke resources. With the tight supply and rising price of petroleum coke, this problem is particularly prominent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Pre-crushing and screening the calcined petroleum coke, anode roasted granules and dried boiler cinder to obtain 2-12 mm boiler cinder particles, 0.5-6 mm anode roasted granules and 1-8 mm calcined petroleum coke; Coal slag particles, anode roasted crushed particles and calcined petroleum coke particles are mixed according to a weight ratio of 1:50:49, put into a three-dimensional mixer and mixed for 15 minutes to obtain a filling material for a roasting furnace. The filling material can be directly used in the anode roasting furnace. After 12 roasting cycles in the laboratory, it is determined that the oxidation consumption per ton of the filling material is 3.7kg / t·C, which is higher than the average of pure calcined coke as the filling material. Oxidation loss decreased by 75.3%.

Embodiment 2

[0017] Pre-crushing and screening the calcined petroleum coke, anode roasting crushed particles and dried gasifier cinder to obtain 2-12mm coal gasifier cinder particles, 0.5-6mm anode roasting crushed particles and 1-8mm calcined For petroleum coke, coal slag particles, anode roasted crushed particles and calcined petroleum coke particles are mixed according to a weight ratio of 45:30:25, put into a three-dimensional mixer and mixed for 20 minutes to obtain a filling material for a roasting furnace. The filling material can be directly used in the anode roasting furnace. After 12 roasting cycles in the laboratory, it is determined that the oxidation consumption per ton of the filling material is 4.1kg / t·C, which is higher than the average of pure calcined coke as the filling material. Oxidation loss decreased by 72.7%.

Embodiment 3

[0019] Pre-crushing and screening the calcined petroleum coke, anode roasted crushed particles and dried mixed coal slag to obtain 2-12 mm mixed coal cinder particles, 0.5-6 mm anode roasted crushed particles and 1-8 mm calcined petroleum coke. Coal slag particles, anode roasted crushed particles and calcined petroleum coke particles are mixed according to a weight ratio of 30:10:60, put into a three-dimensional mixer and mixed for 25 minutes to obtain a filling material for a roasting furnace. The filling material can be directly used in the anode roasting furnace. After 12 roasting cycles, it is determined that the oxidation consumption per ton of products of this filling material is 4.9kg / t·C, which is higher than the average oxidation loss of pure calcined coke as the filling material. A drop of 67.3%.

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Abstract

This invention relates to a filling material for carbon torrefying furnace. The filling material is mixed from: fly ash particles (sizes 2-12 mm) 1-50 wt. %, anode torrefied broken particles (sizes 1-8 mm) 1-50 wt. %, and calcined coke particles as balance. The filling material has such advantages as high strength, good air permeability, good heat conductance, low oxidation loss and can be directly used in carbon torrefying furnace.

Description

technical field [0001] The invention relates to a filling material for a carbon roasting furnace, which relates to a filling material for a carbon roasting furnace in the roasting process of producing carbon products for aluminum. Background technique [0002] Carbon cathodes and anodes are the main raw materials for electrolytic aluminum production, and carbon cathodes and anodes need to be roasted to meet the requirements of the electrolytic aluminum process. Roasting refers to the indirect heat treatment of raw carbon products in a specific environment, so that the binder in the raw products is decomposed, the volatile matter is removed, and coking is gradually realized to form a C-C network structure, thereby improving the physical and chemical properties of the product. In order to prevent the main components of carbon green products from being oxidized under high temperature conditions, the green products are indirectly heated under the conditions of insulating the air...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/52
Inventor 陈喜平李旺兴王玉罗钟生
Owner 河南华慧有色工程设计有限公司
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