CN101456745B - Calcining filler processing method and system - Google Patents

Abstract

The invention discloses a calcined filler, in particular to a calcined filler processing method and system suitable for producing aluminum anodes, cathodes and electrodes. A method for processing roasting filling materials, comprising the following steps: sending metallurgical coke to a screening device for screening, sending metallurgical coke with a qualified particle size to a finished product screw conveyor, and sending metallurgical coke with an unqualified particle size to be processed The equipment will process the metallurgical coke sent to the finished product screw conveyor and then sent to the finished product trough. The present invention adopts the above-mentioned roasting filling material processing technology, and crushes and sieves the metallurgical coke into the finished product of the optimally matched filling material with compressibility, adsorption and gas permeability at a particle size of 0.5-6mm, which improves the roasted product. The bulk density and mechanical strength reduce the shrinkage speed of the green body. Improved production operating environment. The invention effectively solves the technical problems of low selectivity of filler raw materials, high cost, and serious environmental pollution and raw material loss caused by the filler during transportation.

Description

A method and system for processing roasted filler

technical field

The invention relates to a filling material processing method and system, in particular to a roasting filling material processing method and system suitable for producing aluminum anodes, cathodes and electrodes.

Background technique

The filler is the bulk granular material used to cover the green body and fill the gap during firing to prevent the green body from oxidation and deformation. The main functions of fillers during green body roasting are: 1. Prevent the green body from being oxidized in direct contact with the heating flame; 2. Fix the shape of the green body; 3. Conduct heat to the green body; 4. Retain the volatile content of the green body during roasting discharge channel. The roasting filler has a significant effect on the carbon residue rate of the green body during the roasting process, thereby affecting the physical and chemical properties of the roasted product, so the filler plays an important role in the roasting process. Fillers are generally required to have good thermal conductivity, low adsorption, moderate particle size, easy access to materials, and cheap prices. Most carbon plants now use metallurgical coke as a roasting filler, and the purchased metallurgical coke needs to be processed before it can be used as a roasting filler. After long-term production practice and continuous research, it is found that the particle size of the filler has a certain influence on the green body roasting, and the filler with a particle size of 0.5-6 mm has the best combination of compressibility, adsorption and air permeability. If there is too much powder less than 0.5mm in the filling material, it will lead to increased burning loss of roasted products and reduced carbon residue rate. If the particles are too large, the surface structure of the baked product will be affected. The particle size suitable for aluminum anode, cathode and electrode firing fillers is that the amount of large particles greater than 6mm and powder less than 0.5mm should not exceed 10%. The existing processing methods of roasting fillers in carbon products enterprises generally use the crushing and screening system in the raw product production workshop to separate some materials with a particle size of 0.5-6 mm, and then transport them to the filler storage area in the roasting workshop by vehicles. On the one hand, this method reduces the selectivity of raw materials, and it can only choose the raw materials used in the production of raw products as fillers, which is costly; on the other hand, the fillers cause serious environmental pollution and loss of raw materials during transportation.

Contents of the invention

In order to solve the above-mentioned technical problems, the present invention provides a method and system for processing roasted fillers, the purpose of which is to effectively solve the problems of low selectivity of filler raw materials, high cost, and serious environmental pollution and raw material loss caused by fillers during transportation. technical problem.

In order to achieve the above object, the present invention is achieved by adopting the following technical scheme: a method for processing roasted filling materials, which includes the following steps: sending metallurgical coke to screening equipment for screening, and sending metallurgical coke with qualified screening particle size to The finished product screw conveyor, the metallurgical coke with unqualified screening particle size is sent to the processing equipment for processing, and the metallurgical coke sent to the finished product screw conveyor is then sent to the finished product trough.

The metallurgical coke with an unqualified screening particle size is sent to the processing equipment for processing, including the following steps: sending the metallurgical coke with a screening particle size smaller than the qualified product particle size to the powder screw conveyor; The metallurgical coke is sent to the crusher for crushing.

The powder screw conveyor sends the metallurgical coke with a particle size smaller than the qualified product to the powder bin.

The powder in the powder silo is sent to the bagging machine for bagging.

The metallurgical coke whose particle size is larger than the qualified product is crushed and then sent to the screening equipment for screening.

The metallurgical coke crushed by the crusher is first sent to the bucket elevator for lifting and then sent to the screening equipment.

The metallurgical coke screened by the screening equipment is first screened by the grizzly hopper and then sent to the screening equipment.

The metallurgical coke screened by the grid sieve hopper is sent to the bucket elevator by the feeding equipment and then sent to the screening equipment.

The screening equipment is equipped with double-layer screens, the metallurgical coke in the bottom layer is sent to the powder screw conveyor; the metallurgical coke in the middle layer is sent to the finished product screw conveyor; the metallurgical coke in the top layer is sent to the crusher.

The qualified particle size of the metallurgical coke is 0.5-6mm.

A roasting filling material processing system, which is composed of the following structure: the outlet at the bottom of the screening equipment is connected to the inlet of the powder screw conveyor, the outlet of the middle layer of the screening equipment is connected to the inlet of the screw conveyor for finished products, and the outlet of the top layer of the screening equipment is connected to the inlet of the screw conveyor for powder materials. The inlet of the crusher is connected, the outlet of the powder screw conveyor is connected with the inlet of the powder silo, the outlet of the finished product screw conveyor is connected with the mouth trough, and the outlet of the crusher is connected with the inlet of the screening equipment.

The outlet of the powder hopper is connected with a bagging machine.

A bucket elevator is provided between the crusher and the screening equipment.

The inlet of the bucket elevator is connected with the outlet of the grizzly hopper.

Feeding equipment is provided between the bucket elevator and the grid sieve hopper.

The feeding equipment is an electromagnetic vibrating feeder or a motor vibrating feeder.

The crusher is an impact crusher, a roller crusher or a hammer crusher.

The screening equipment is an inertial vibrating screen or a probability screen.

The particle size of the metallurgical coke in the middle layer of the screening equipment is 0.5-6 mm.

Advantage and effect of the present invention are:

Using the above-mentioned roasting filler processing technology, the metallurgical coke is crushed and screened into a finished filler product with the best combination of compressibility, adsorption and air permeability at a particle size of 0.5-6mm, so as to increase the volume of the roasted product Density and mechanical strength, reduce the shrinkage speed of the green body. And the powder less than 0.5mm produced during the processing is recycled and bagged to improve the production and operation environment. The invention effectively solves the technical problems of low selectivity of filler raw materials, high cost, and serious environmental pollution and raw material loss caused by the filler during transportation.

Description of drawings

Fig. 1 is a schematic diagram of the processing and system structure of the roasting filling material of the present invention.

In the figure: 1. Grid sieve hopper, 2. Feeding equipment, 3. Bucket elevator, 4. Screening equipment, 5. Crusher, 6. Finished product screw conveyor, 7. Finished product trough, 8. Powder Screw conveyor, 9, powder silo, 10, bagging machine.

Detailed ways

The present invention will be further described in detail below in conjunction with the examples, but the protection scope of the present invention is not limited by the examples.

The invention relates to a method for processing roasting filler, which comprises the following process steps: sending the metallurgical coke to a screening device for screening, and the metallurgical coke screened by the screening device is first screened by a grid sieve hopper and then sent to the screening device , the metallurgical coke screened by the grid sieve hopper is sent to the bucket elevator by the feeding equipment and then sent to the screening equipment. The processing equipment is used for processing. The screening equipment used is equipped with double-layer screens. The metallurgical coke in the bottom layer is sent to the powder screw conveyor; the metallurgical coke in the middle layer is sent to the finished product screw conveyor. The metallurgical coke is sent to the crusher, and the metallurgical coke sent to the finished screw conveyor is sent to the finished product trough.

The metallurgical coke with unqualified screening material size is sent to the processing equipment for processing. The metallurgical coke with a screening particle size smaller than the qualified product particle size is sent to the powder screw conveyor, and the powder screw conveyor sends the metallurgical coke with a particle size of less than 0.5mm to Powder silo, the powder in the powder silo is sent to the bagging machine for bagging; the metallurgical coke with a particle size greater than 6mm is sent to the crusher for crushing, and the metallurgical coke with a particle size larger than 6mm is crushed and then sent to the screening equipment For screening, the metallurgical coke crushed by the crusher is first sent to the bucket elevator for lifting and then sent to the screening equipment.

As shown in Figure 1, a roasting filling material processing system has the following structure: the outlet at the bottom of the screening device 4 is connected to the inlet of the powder screw conveyor 8, and the outlet of the middle layer of the screening device 4 is connected to the inlet of the finished product screw conveyor 6 , the top outlet of the screening equipment 4 is connected to the crusher 5 inlet, the powder screw conveyor 8 outlet is connected to the powder bin 9 inlet, the powder bin 9 outlet is connected to the bagging machine 10, and the finished product screw conveyor 6 outlet is connected to the mouth The trough 7 is connected, the outlet of the crusher 5 is connected to the inlet of the screening equipment 4, a bucket elevator 3 is arranged between the crusher 5 and the screening equipment 4, and the inlet of the bucket elevator 3 is connected to the outlet of the grizzly hopper 1 , there is a feeding device 2 between the bucket elevator 3 and the grid sieve hopper 1, the feeding device 2 is an electromagnetic vibrating feeder or a motor vibrating feeder, the crusher 5 is an impact crusher, a roller crusher Or a hammer crusher, the screening device 4 is an inertial vibrating screen or a probability screen, and the particle size of the metallurgical coke in the middle layer of the screening device is 0.5-6 mm.

The working process of the present invention is as follows: metallurgical coke is added to the grid sieve hopper 1, then the feeding equipment 2 evenly feeds the material to the bucket elevator 3, the material is lifted to the screening equipment 4, and the top layer outlet of the screened material is sent through the material slide pipe To the crusher 5, the crushed material enters the bucket elevator 3 and is sent to the screening equipment 4 for screening, wherein the qualified material screened is transported to the finished product trough 7 by the finished product screw conveyor 6, and the powder exiting at the bottom of the screen passes through The powder material screw conveyor 8 is sent to the powder material bin 9, and a bagging machine 10 is installed behind the powder material bin 9 to bag the powder material less than 0.5mm produced. During the processing process, the large particle materials larger than 6mm are always crushed in a circular manner, and the resulting powder is recycled.

The grid sieve hopper 1 of the present invention is to screen out the metallurgical coke particles with too large particle size, so as to improve the screening and crushing efficiency of the screening equipment 4 and the crusher 5, and different sizes can be used according to the particle size of the purchased metallurgical coke. grid. The feeding equipment 2 requires good sealing, and different specifications and models of feeding equipment can be selected according to the different production capacity of the system. The screening device 4 is a double-layer sieve, and the particle size of the finished product can be changed by changing the aperture of the screen to meet the different requirements for the particle size of the filler for products of different specifications.

Claims (13)

1. A method for processing roasting fillers, characterized in that it comprises the following process steps: metallurgical coke is sent to screening equipment for screening, and metallurgical coke with a qualified screening particle size is sent to a finished product screw conveyor, and the screening particle size is not Qualified metallurgical coke is sent to the processing equipment for processing, and the metallurgical coke sent to the finished product screw conveyor is sent to the finished product trough; the metallurgical coke with unqualified screening particle size is sent to the processing equipment for processing, including the following steps: The metallurgical coke whose particle size is smaller than the qualified product size is sent to the powder screw conveyor; the metallurgical coke whose screening particle size is larger than the qualified product size is sent to the crusher for crushing, and the powder screw conveyor sends the metallurgical coke smaller than the qualified product size to The powder silo, the powder in the powder silo is bagged by the bagging machine; the metallurgical coke larger than the qualified product size is crushed and then sent to the screening equipment for screening, and the metallurgical coke crushed by the crusher is lifted by the bucket elevator Then sent to the screening equipment. 2. A method for processing roasting filling materials according to claim 1, characterized in that the metallurgical coke screened by the screening equipment is first screened by a grid sieve hopper and then sent to the screening equipment. 3. A method for processing roasted filling material according to claim 2, characterized in that the metallurgical coke screened by the grid sieve hopper is sent to the bucket elevator by the feeding equipment for lifting and then sent to the screening equipment. 3. A method for processing roasted filling materials according to claim 1, 2 or 3, characterized in that the screening equipment is equipped with double-layer sieves, and the metallurgical coke at the bottom layer is sent to the powder screw conveyor; the middle layer The metallurgical coke on the top layer is sent to the finished screw conveyor; the metallurgical coke on the top layer is sent to the crusher. 4. A method for processing roasted filling material according to claim 1, characterized in that the qualified particle size of said metallurgical coke is 0.5-6mm. 5. A roasting filling material processing system, characterized in that it is composed of the following structure: the outlet at the bottom of the screening equipment is connected to the inlet of the powder screw conveyor, the outlet of the middle layer of the screening equipment is connected to the inlet of the finished product screw conveyor, and the screening The outlet on the top floor of the equipment is connected to the inlet of the crusher, the outlet of the powder screw conveyor is connected to the inlet of the powder silo, the outlet of the finished product screw conveyor is connected to the mouth trough, and the outlet of the crusher is connected to the inlet of the screening equipment. 6. A roasting filler processing system according to claim 5, characterized in that the outlet of the powder silo is connected to a bagging machine. 7. A roasting filler processing system according to claim 5, characterized in that a bucket elevator is provided between the crusher and the screening equipment. 8. A roasting filler processing system according to claim 7, characterized in that the inlet of the bucket elevator is connected to the outlet of the grizzly hopper. 9. A roasting filler processing system according to claim 8, characterized in that a feeding device is provided between the bucket elevator and the grid sieve hopper. 10. A roasting filler processing system according to claim 9, characterized in that said feeding equipment is an electromagnetic vibrating feeder or a motor vibrating feeder. 11. A roasting filler processing system according to claim 5 or 7, characterized in that the crusher is an impact crusher, a roller crusher or a hammer crusher. 12. A roasting filler processing system according to claim 5 or 7, characterized in that the screening equipment is an inertial vibrating screen or a probability screen. 13. A roasting filler processing system according to claim 12, characterized in that the particle size of the metallurgical coke in the middle layer of the screening equipment is 0.5-6mm.