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Method for producing coke by replacing part of coal by sawdust

A technology to replace parts and wood chips, applied in coke ovens, biofuels, special forms of dry distillation, etc., can solve problems such as huge costs, and achieve the effects of protecting the environment, reducing inorganic impurities and increasing carbon content.

Active Publication Date: 2016-02-10
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the lack of oil resources in our country, the dependence on foreign countries exceeds 40%. In order to alleviate the lack of oil, many scientific researchers have carried out research on the use of coal for liquefaction to produce industrial oil, but the cost of this process is quite huge.

Method used

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  • Method for producing coke by replacing part of coal by sawdust

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Sieve the sawdust from the sawmill. The sawdust with a particle size of less than 3mm is used for the test. The sawdust with a particle size of more than 3mm is crushed by a crusher. The crushed sawdust is used as a sample. Dry in an oven at 105°C for 15 hours to ensure that the moisture content of the sawdust after drying is below 3%. After drying, it is cooled in the air. The base coal used is the blended coal of the production plant (A d = 6%, VM d = 28%), the particle size is less than 6mm, the sawdust and basic coal accounting for 6% of the weight of the basic coal are added to the crusher for mixing and crushing, and the particle size after crushing is less than 1mm; a certain amount of Ensure that the moisture content of the mixture is 5%, and then put the mixture into a 40kg coke oven and carry out a coking test under a certain heating system to obtain qualified coke, and then carry out quality inspection of the coke. The test results of coke products are: M40 ...

Embodiment 2

[0020] Sieve the sawdust from the sawmill. The sawdust with a particle size of less than 3mm is used for the test. The sawdust with a particle size of more than 3mm is crushed by a crusher. The crushed sawdust is used as a sample. Dry in an oven at 105°C for 17 hours to ensure that the moisture content of the sawdust after drying is below 3%. After drying, it is cooled in the air. The base coal used is the blended coal of the production plant (A d = 7%, VM d = 27%), the particle size is less than 6mm, the sawdust and basic coal accounting for 7% of the weight of the basic coal are added to the crusher for mixing and crushing, and the particle size after crushing is less than 1mm; a certain amount of Ensure that the moisture content of the mixture is 5.5%, and then put the mixture into a 40kg coke oven and carry out a coking test under a certain heating system to obtain qualified coke, and then carry out a quality inspection of the coke. The test results of coke products are: ...

Embodiment 3

[0022] Sieve the sawdust from the sawmill. The sawdust with a particle size of less than 3mm is used for the test. The sawdust with a particle size of more than 3mm is crushed by a crusher. The crushed sawdust is used as a sample. Dry in an oven at 105°C for 18 hours to ensure that the moisture content of the sawdust after drying is below 3%. After drying, it is cooled in the air. The base coal used is the blended coal of the production plant (A d = 8%, VM d = 25%), the particle size is less than 6mm, the sawdust and basic coal accounting for 8% of the weight of the basic coal are added to the crusher for mixing and crushing, and the particle size after crushing is less than 1mm; Ensure that the moisture content of the mixture is 6%, and then put the mixture into a 40kg coke oven and carry out a coking test under a certain heating system to obtain qualified coke, and then carry out a quality inspection of the coke. The test results of coke products are: M40 is 59.7%, M10 is 1...

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Abstract

The invention relates to a method for producing coke by replacing part of coal by sawdust. A sawdust resource and coal blend are mixed and matched in use, so that coke which is relatively high in quality is produced. A manufacturing method and a process course are as follows: I, sawdust screening; II, drying treatment of sawdust; III, mixed crushing of materials; and IV, product preparation. According to the method provided by the invention, by producing coke by matching the sawdust and the basic coal blend with each other, the characteristic that the sawdust contains a large amount of lignocellulose is fully used, thereby finding a novel path for high-value utilization of the sawdust. Meanwhile, part of coking coal can be replaced by sawdust coking, the coking coal shortage problem caused by consumption of a large amount of coking coal can be alleviated, and CO2 emission in a coking process and an iron-making process is reduced. Furthermore, sawdust coking further can reduce sulfur in coke and ash in coke and improve the carbon content in coke, and can reduce inorganic impurities in coke, ensure a stable porous structure and a high specific surface area of coke and can enhance the surface activity of coke.

Description

technical field [0001] The invention relates to the field of environmental protection and the technical field of coke preparation, in particular to a method for producing coke by substituting wood chips for part of coal. Background technique [0002] China can produce 300 million tons of fuel from crops every year; every year 900 million tons of wood fuel can be produced from miscellaneous wood generated in forest logging and waste wood produced after wood processing, wood chips and other raw materials, and its potential as an alternative energy source The resources are 1.2 billion tons per year. The use of wood pellet fuel, an alternative energy source and environmentally friendly fuel, can make a substantial contribution to "reduction of greenhouse gas emissions", and can also greatly reduce energy consumption. Compared with fossil fuels, it can save more than 50% of energy on average. [0003] Wood chips have been widely used in many aspects. Patent CN93107257.3 proposes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/02
CPCY02E50/10
Inventor 王玉明毛晓明胡德生钱晖
Owner BAOSHAN IRON & STEEL CO LTD
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