CN113174272A - Preparation method of bamboo charcoal powder used as coke preparation thinning agent and coke thinning process - Google Patents

Preparation method of bamboo charcoal powder used as coke preparation thinning agent and coke thinning process Download PDF

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Publication number
CN113174272A
CN113174272A CN202110372970.4A CN202110372970A CN113174272A CN 113174272 A CN113174272 A CN 113174272A CN 202110372970 A CN202110372970 A CN 202110372970A CN 113174272 A CN113174272 A CN 113174272A
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bamboo
coke
bamboo charcoal
preparation
charcoal powder
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CN202110372970.4A
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Inventor
祁娟
郭建伟
孙占龙
柴茂生
武建军
郭振坤
陈莉晴
李世俊
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China University of Mining and Technology CUMT
Xuzhou College of Industrial Technology
Shanxi Qinxin Energy Group Co Ltd
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China University of Mining and Technology CUMT
Xuzhou College of Industrial Technology
Shanxi Qinxin Energy Group Co Ltd
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Priority to CN202110372970.4A priority Critical patent/CN113174272A/en
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
    • C10B57/12—Applying additives during coking
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
    • C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
    • C10B57/06—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition containing additives
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L10/00—Use of additives to fuels or fires for particular purposes

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

The invention discloses a preparation method of bamboo charcoal powder serving as a thinning agent for preparing coke and a coke thinning process, which are suitable for the technical field of coal chemical industry. The bamboo charcoal powder is used as thinning agent to regulate the ratio of inert component to active component in coking coal, so as to increase the lumpiness and coking rate of coke and regulate the reactivity, apparent porosity and post-reaction strength of coke of different purposes. The bamboo charcoal powder used as thinning agent is porous matter produced by carbonizing bamboo or organic solid waste produced by processing bamboo at certain temperature. Compared with the common thinning agent (lean coal and coke powder) for coking, the finished product has low ash content, good grindability, high fiber component content and developed pores, and can better adsorb liquid phase substances generated by coal pyrolysis, so that the fluidity and the expansion degree are reduced, gas products are easy to separate out, the pore wall is thickened, cracks of coke are few, and the performances of the coke, such as strength, lumpiness and the like, are improved.

Description

Preparation method of bamboo charcoal powder used as coke preparation thinning agent and coke thinning process
Technical Field
The invention relates to a bamboo charcoal powder preparation method and a coke thinning process, in particular to a bamboo charcoal powder preparation method and a coke thinning process which are used as coke preparation thinning agents and are particularly suitable for coking coal refining, and belongs to the technical field of coal chemical industry.
Background
In the tamping coking process, the lean coal and the coke powder are generally used as thinning agents, so that the lumpiness and coking rate of the coke can be increased. The principle of interchangeability of coal blending: in order to obtain coke with good quality, the inert components and the active components are mixed with coal to reach a proper ratio.
The lean coal and the coke powder contain more inert components, and the content of fiber components (inert components) in the blended coal, namely the content of silk components in coal rock components, can be increased after blending, so that the quality requirement of the blended coal is met. The thinning agent is prepared from the coal material with high volatility and high fluidity, and can adsorb a certain amount of liquid phase substances generated by coal pyrolysis, so that the fluidity and the expansion degree are reduced, gas products are easy to separate out, the cohesiveness is improved, the pore wall is thickened, the shrinkage speed in the coking process is reduced, cracks (also called crack resistance agents) of coke are reduced, and the strength and the lumpiness of the coke can be improved. But the fluidity and the expansion degree of the colloidal body can be reduced to only oneAnd (4) determining the limit. If not, the caking property is lowered and the wear resistance of the coke is lowered. The ash content of the coke powder is increased as a thinning agent, and the bamboo charcoal powder serving as a silk-like component has many pores and large specific surface area (500 plus 800 m)2/g), low ash content and good grindability, is expected to be a partial substitute of coke powder, and the addition amount needs to be researched in view of relatively low density and large volume. At present, semi coke is used as a conventional thinning agent, and is non-renewable fossil energy coal, and meanwhile, serious environmental pollution and high treatment cost can be caused in the production process.
Disclosure of Invention
In order to overcome the technical problems, the invention provides a bamboo charcoal powder preparation method and a coke thinning process which have the advantages of simple preparation, low cost and good use effect, can improve the quality of coke, and effectively utilize bamboo processing waste as a coke preparation thinning agent.
In order to achieve the technical purpose, the preparation method of the bamboo charcoal powder used as the coke preparation thinning agent comprises the following steps:
collecting bamboo processing waste including bamboo leaves, bamboo joints, bamboo stems, bamboo roots and bamboo shells, and adding the bamboo processing waste and the bamboo into a drying device for drying;
feeding the dried bamboo processing waste and the bamboo into a crushing device together for primary crushing to obtain bamboo dust powder;
screening bamboo dust powder within a preset particle size range by using a screening device, then putting the bamboo dust powder into a carbonization furnace, heating to 400 ℃ at a speed of 2 ℃/min, keeping the temperature for 1h, heating to 600 ℃ at a speed of 5 ℃/min, and keeping the temperature for 30min for carbonization treatment to obtain coarse bamboo charcoal;
after the carbonization treatment, the coarse bamboo charcoal is cooled to room temperature in a carbonization furnace by insulating air, and then is fed into a crushing device for secondary crushing; thereby obtaining the bamboo charcoal powder used as a thinning agent for preparing coke.
The bamboo processing waste and the bamboo need to be naturally dried before being added into drying equipment for drying, and the bamboo processing waste accounts for about 80 percent of the total amount of the used raw materials; the water content of the dried bamboo processing waste and the bamboo is not more than 5 percent.
The carbonization furnace is completely isolated from air and is provided with a tar condensation receiving device.
The grain size of the bamboo dust powder crushed for the first time is not more than 3 mm; and crushing the coarse bamboo charcoal in a grinding mode for the second crushing, wherein the particle diameter of the fine bamboo charcoal obtained after crushing is not more than 0.5 mm.
The crude bamboo charcoal is obtained, and simultaneously, a condensation receiving device is used for collecting pyrolysis gas generated in the carbonization process as bamboo vinegar liquid, the yield of the bamboo vinegar liquid is 60 wt%, and the bamboo vinegar liquid is used for preparing a bactericide and a pesticide.
A coke thinning process for preparing bamboo charcoal powder as a thinning agent by using coke comprises the following steps: the bamboo charcoal powder used as a coke preparation thinning agent is crushed to a particle size of less than or equal to 0.5mm, mixed with prepared coking coal according to the mass ratio of 5 wt%, then heated to 600 ℃ at a speed of 3 ℃/min, and then kept at the constant temperature for 2h, and then heated to 1050 ℃ at a speed of 2 ℃/min, and kept at the constant temperature for 1h, during the generation process of the colloidal body, liquid phase in the colloidal body is crosslinked with bamboo charcoal holes from all directions, and a relatively stable structure is formed after solidification, so that the strength of the coke is improved, the lumpiness of the coke is increased, and cracks generated by the coke are reduced.
Has the advantages that: the bamboo charcoal used in the method is derived from renewable biomass bamboo, the raw material of the bamboo charcoal is waste such as bamboo sawdust and the like generated in the processing process of bamboo products, the bamboo charcoal is applied to a coking and thinning agent, the quality of the coke can be improved, the pollution problem of the bamboo processing waste is solved, and gaseous and liquid byproducts generated in the carbonization process are effectively utilized in the forms of bamboo vinegar liquid and pyrolysis gas.
The bamboo charcoal as coking and thinning agent has more developed pores, and the specific area of semi coke and coke powder is 100m2Less than g, and the specific surface area of the bamboo charcoal is 700m2More than g. In the process of generating the colloidal body, the liquid phase in the colloidal body is intersected with the bamboo charcoal holes from all directions, and a relatively stable structure is formed after solidification, so that the strength of the coke is improved, the lumpiness of the coke is increased, and cracks generated by the coke are reduced. The surface characteristics of the carbon formed by the biomass are more favorable for forming a cross-linking structure with the colloidal body compared with coke powder and semi coke. Compared with semi-coke and coke powder, the bamboo charcoal formed by bamboo carbonization has lower content of minerals and ash content,is beneficial to reducing the mineral content in the coke.
After the bamboo charcoal powder is added into the blended coal, the apparent porosity and the reactivity of the obtained coke are reduced, the large block rate is increased, and the improvement of the coke quality is facilitated; meanwhile, the coke thinning agent has low raw material cost and simple and easy preparation method.
Drawings
The invention will be further described with reference to the following detailed description and drawings:
FIG. 1 is a scanning electron micrograph of a coke-thinning agent obtained in the following example.
Detailed Description
Embodiments of the present application are further described below with reference to the accompanying drawings:
the preparation method of the bamboo charcoal powder used as the thinning agent for preparing the coke is characterized by comprising the following steps:
collecting bamboo processing waste including bamboo leaves, bamboo joints, bamboo stems, bamboo roots and bamboo shells, and adding the bamboo processing waste and the bamboo into a drying device for drying; the bamboo processing waste and the bamboo need to be naturally dried before being added into drying equipment for drying, and the bamboo processing waste accounts for about 80 percent of the total amount of the used raw materials; the water content of the dried bamboo processing waste and the bamboo is not more than 5 percent.
Feeding the dried bamboo processing waste and the bamboo into a crushing device together for primary crushing to obtain bamboo dust powder; the grain diameter of the bamboo dust powder crushed at one time is not more than 3 mm; and crushing the coarse bamboo charcoal in a grinding mode for the second crushing, wherein the particle diameter of the fine bamboo charcoal obtained after crushing is not more than 0.5 mm.
Screening bamboo dust powder within a preset particle size range by using a screening device, then putting the bamboo dust powder into a carbonization furnace, completely isolating air in the carbonization furnace, and preparing a tar condensation receiving device, heating to 400 ℃ at a speed of 2 ℃/min, keeping the temperature for 1h, heating to 600 ℃ at a speed of 5 ℃/min, and keeping the temperature for 30min for carbonization treatment to obtain crude bamboo charcoal; the crude bamboo charcoal is obtained, and simultaneously, a condensation receiving device is used for collecting pyrolysis gas generated in the carbonization process as bamboo vinegar liquid, the yield of the bamboo vinegar liquid is 60 wt%, and the bamboo vinegar liquid is used for preparing a bactericide and a pesticide.
After the carbonization treatment, the coarse bamboo charcoal is cooled to room temperature in a carbonization furnace by insulating air, and then is fed into a crushing device for secondary crushing; thereby obtaining the bamboo charcoal powder used as a thinning agent for preparing coke.
As shown in fig. 1, a scanning electron micrograph of the product with added coke thinning agent (magnification 40000 times); a coke thinning process for preparing bamboo charcoal powder as a thinning agent by using the coke comprises the following steps: the bamboo charcoal powder used as a coke preparation thinning agent is crushed to a particle size of less than or equal to 0.5mm, mixed with prepared coking coal according to the mass ratio of 5 wt%, then heated to 600 ℃ at a speed of 3 ℃/min, and then kept at the constant temperature for 2h, and then heated to 1050 ℃ at a speed of 2 ℃/min, and kept at the constant temperature for 1h, during the generation process of the colloidal body, liquid phase in the colloidal body is crosslinked with bamboo charcoal holes from all directions, and a relatively stable structure is formed after solidification, so that the strength of the coke is improved, the lumpiness of the coke is increased, and cracks generated by the coke are reduced.
Example 1
Selecting bamboo scrap waste (moisture is larger than or equal to 30%) generated in the processing process of bamboo products in Sichuan, Yunnan, Zhejiang and the like, naturally airing in the air until the moisture is smaller than or equal to 15%, drying in a drying room until the moisture is smaller than or equal to 5%, and crushing by a biomass crusher until the particle size is smaller than or equal to 3 mm. Placing the crushed bamboo scraps into a closed iron box, carbonizing in a carbonization furnace at room temperature, heating to 500 ℃ at a temperature of 10 ℃/min, keeping the temperature for 60min, naturally cooling to room temperature, and crushing until the particle size is less than or equal to 0.5 mm. In the coking experiment, the main coking coal accounts for 60 percent, the gas coal and the lean coal account for 30 percent, the coke powder accounts for 5 percent and the asphalt accounts for 5 percent in the coal blending. The coal blending water content is 5 percent, the ash content is 8 percent, the volatile matter content is 20 percent, the sulfur content is 0.7 percent, the Y value is 10, the X value is 20,
coking is carried out by a laboratory 30kg coke oven and an iron box experiment, the final coking temperature is 1050, the heating rate is 2 ℃/min, and the coke is quenched by water. The experiment proves that when no thinning agent is added, the quality indexes of the prepared coke are as follows: m40＝85％，M1012%, CRI 18%, CSR 55%. When 5% of thinning agent is added, the quality indexes of the prepared coke are as follows: m40＝90％，M107%, CRI 15%, CSR 60%. As can be seen, the thinning agent improves the wear resistance and the heat strength of the coke and reduces the falling strengthAnd CO2And (4) reactivity.

Claims (6)

1. A preparation method of bamboo charcoal powder used as a thinning agent for preparing coke is characterized by comprising the following steps:
collecting bamboo processing waste including bamboo leaves, bamboo joints, bamboo stems, bamboo roots and bamboo shells, and adding the bamboo processing waste and the bamboo into a drying device for drying;
feeding the dried bamboo processing waste and the bamboo into a crushing device together for primary crushing to obtain bamboo dust powder;
screening bamboo dust powder within a preset particle size range by using a screening device, then putting the bamboo dust powder into a carbonization furnace, heating to 400 ℃ at a speed of 2 ℃/min, keeping the temperature for 1h, heating to 600 ℃ at a speed of 5 ℃/min, and keeping the temperature for 30min for carbonization treatment to obtain coarse bamboo charcoal;
after the carbonization treatment, the coarse bamboo charcoal is cooled to room temperature in a carbonization furnace by insulating air, and then is fed into a crushing device for secondary crushing; thereby obtaining the bamboo charcoal powder used as a thinning agent for preparing coke.
2. The method for preparing bamboo charcoal powder as a coke preparation leaner according to claim 1, characterized in that: the bamboo processing waste and the bamboo need to be naturally dried before being added into drying equipment for drying, and the bamboo processing waste accounts for about 80 percent of the total amount of the used raw materials; the water content of the dried bamboo processing waste and the bamboo is not more than 5 percent.
3. The method for preparing bamboo charcoal powder as a coke preparation leaner according to claim 1, characterized in that: the carbonization furnace is completely isolated from air and is provided with a tar condensation receiving device.
4. The method for preparing bamboo charcoal powder as a coke preparation leaner according to claim 1, characterized in that: the grain size of the bamboo dust powder crushed for the first time is not more than 3 mm; and crushing the coarse bamboo charcoal in a grinding mode for the second crushing, wherein the particle diameter of the fine bamboo charcoal obtained after crushing is not more than 0.5 mm.
5. The method for preparing bamboo charcoal powder as a coke preparation leaner according to claim 1, characterized in that: the crude bamboo charcoal is obtained, and simultaneously, a condensation receiving device is used for collecting pyrolysis gas generated in the carbonization process as bamboo vinegar liquid, the yield of the bamboo vinegar liquid is 60 wt%, and the bamboo vinegar liquid is used for preparing a bactericide and a pesticide.
6. A coke-thinning process for preparing bamboo charcoal powder as a coke-making thinning agent using the bamboo charcoal powder as a coke-making thinning agent according to claim 1, characterized in that: the bamboo charcoal powder used as a coke preparation thinning agent is crushed to a particle size of less than or equal to 0.5mm, mixed with prepared coking coal according to the mass ratio of 5 wt%, then heated to 600 ℃ at a speed of 3 ℃/min, and then kept at the constant temperature for 2h, and then heated to 1050 ℃ at a speed of 2 ℃/min, and kept at the constant temperature for 1h, during the generation process of the colloidal body, liquid phase in the colloidal body is crosslinked with bamboo charcoal holes from all directions, and a relatively stable structure is formed after solidification, so that the strength of the coke is improved, the lumpiness of the coke is increased, and cracks generated by the coke are reduced.
CN202110372970.4A 2021-04-07 2021-04-07 Preparation method of bamboo charcoal powder used as coke preparation thinning agent and coke thinning process Pending CN113174272A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101643656A (en) * 2009-08-20 2010-02-10 韩大海 Coke making method by adding biomass energy to mixed coal
CN103194245A (en) * 2013-04-07 2013-07-10 昆明理工大学 Preparation method of biomass carbon coal
CN103450915A (en) * 2013-09-07 2013-12-18 鞍钢股份有限公司 Preparation method of metallurgical biomass semi-coke
JP2014214268A (en) * 2013-04-26 2014-11-17 新日鐵住金株式会社 Manufacturing method of high-strength coke for blast furnace
CN108795463A (en) * 2017-04-28 2018-11-13 宝山钢铁股份有限公司 The method that coking production is carried out as part coking raw material using Wooden Biomass
CN111978970A (en) * 2020-07-23 2020-11-24 北京科技大学 Method for preparing coking raw material by biomass hydrothermal carbonization treatment and application of method in coking production

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101643656A (en) * 2009-08-20 2010-02-10 韩大海 Coke making method by adding biomass energy to mixed coal
CN103194245A (en) * 2013-04-07 2013-07-10 昆明理工大学 Preparation method of biomass carbon coal
JP2014214268A (en) * 2013-04-26 2014-11-17 新日鐵住金株式会社 Manufacturing method of high-strength coke for blast furnace
CN103450915A (en) * 2013-09-07 2013-12-18 鞍钢股份有限公司 Preparation method of metallurgical biomass semi-coke
CN108795463A (en) * 2017-04-28 2018-11-13 宝山钢铁股份有限公司 The method that coking production is carried out as part coking raw material using Wooden Biomass
CN111978970A (en) * 2020-07-23 2020-11-24 北京科技大学 Method for preparing coking raw material by biomass hydrothermal carbonization treatment and application of method in coking production

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