CN100537725C - Utilize coking organic castoff and weakly caking coal to produce the method and system of moulded coal - Google Patents

Utilize coking organic castoff and weakly caking coal to produce the method and system of moulded coal Download PDF

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Publication number
CN100537725C
CN100537725C CNB2005100929663A CN200510092966A CN100537725C CN 100537725 C CN100537725 C CN 100537725C CN B2005100929663 A CNB2005100929663 A CN B2005100929663A CN 200510092966 A CN200510092966 A CN 200510092966A CN 100537725 C CN100537725 C CN 100537725C
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China
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coal
coking
organic castoff
weakly caking
coke
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CNB2005100929663A
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Chinese (zh)
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CN1919987A (en
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廖洪强
余广炜
赵鹏
马刚平
张向伟
程晓光
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首钢总公司
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Abstract

The invention provides a kind of method and system of utilizing coke-oven plant's coking organic castoff and weakly caking coal for the raw material production moulded coal, this method adopts coke-oven plant's organic waste as binding agent, with weakly caking coal uniform mixing coldmoulding according to a certain percentage, this moulded coal is used as the coking raw material, can reach thorough harmless treatment of coking organic castoff and recycling, polygamy weakly caking coal and the net effect that improves the metallurgical coke quality.Implementing the device systems of this method mainly is made up of weakly caking coal shredder assembly, coal buffering storage tank, coking organic castoff mixing stirring device, coking organic castoff buffering storage tank, preliminary mixing device, uniform mixing device, shaper etc.The invention has the advantages that mixing of materials is even, the ratio of briquetting height not only can thoroughly solve coke-oven plant's coking organic castoff problem of environment pollution caused, but also can adopt the coking of weakly caking coal production of shaped coal, improve coke quality, the expansion coking coal resource is saved the coking cost.

Description

Utilize coking organic castoff and weakly caking coal to produce the method and system of moulded coal

Affiliated technical field

The invention belongs to Pollution abatement of coking organic solid castoff and coking briquette manufacture field, especially relate to and utilize coking organic castoff and weakly caking coal method and device systems thereof for the raw material production coking briquette.

Background technology

The annual organic solid castoff that accounts for coke-oven plant coke output 0.1%-0.2% greatly that produces in coke-oven plant comprises coke tar refuse, acid tar and biochemical sludge etc.Wherein coke tar refuse output accounts for the 0.07%-0.1% of coke-oven plant's coke output, and acid tar output accounts for the 0.05%-0.08% of coke-oven plant's coke output, and its composition mostly is poisonous and hazardous organism greatly.These coking organic castoffs cause the severe contamination of environment because of various reasons easily, how to realize that its recycling and harmless treatment are the problems of a sternness.Owing at present along with the variation of coal resources and coke price, make full use of the lower weakly caking coal coal-blending coking of price in coking is produced, obtaining stable coke quality on the other hand, has been to save the coking cost, realizes the important measures that iron and steel enterprise increases income and economizes on spending.

Coke-oven plants such as domestic steel, Handan Iron and Steel Co had once developed employing coking waste residue and had produced moulded coal technology, but all be waste residue to be put into agitated pool stir with artificial the mixing, coal briquette after the moulding is transported to coke oven coal tower belt place and allocates into having bad luck machinery, production technique is simple, be simply equipped, manual operation intensity is big, can reach the purpose of processing of waste, but mechanization degree is not high, influences production easily and influences health of operators.

Chinese patent 200310114624.8 provides a kind of method and apparatus system of new production coking briquette, this method also is to adopt the waste residue of coke-oven plant as binding agent and the mixed moulded coal of coking coal, this method is directly to allocate the coking waste residue into and only pass through mixed once on the coal blending belt, therefore it is uneven very easily to cause waste residue to mix with coal, influence briquet quality, and then influence coke quality; In addition, this patent does not mention that adopting weakly caking coal is raw material processing moulded coal, does not realize reducing the target of coking cost.

U.S. Pat 4481011 mentions that a kind of weakly caking coal and caking coal of utilizing is raw material, utilize coal-tar pitch, coke tar refuse and lightweight oil to be binding agent production coking moulded coal method, require to have simultaneously caking coal and weakly caking coal to make moulded coal raw material (being that part adopts weakly caking coal) in this method, binding agent will be heated to 200 ℃-220 ℃ and carry out pre-treatment.Owing to use lightweight oil to make cost increase as binding agent, binding agent need carry out pre-treatment at 200 ℃-220 ℃, is easy to generate environmental pollution in this patented method.

Summary of the invention

In order to overcome prior art defective and deficiency, the invention provides a kind of Processes and apparatus system of new production coking briquette, can realize the harmless treatment and the recycling of coking organic castoff, increase the weakly caking coal proportioning and reduce the coking cost and improve coke quality.

Its ultimate principle is to be theoretical basis with coal dust selective crushing coking technology and briquetted coal blending coking technology, adopting coke-oven plant's organic solid waste is binding agent, with the weakly caking coal after the selective crushing is raw material, by the moulded coal complete processing of optimizing, production coking moulded coal, moulded coal and coke making and coal blending are mixed into coking by coke oven by a certain percentage, through the coke oven pyroprocessing, coking organic castoff are converted into coke, tar and coal gas.

Technical scheme of the present invention is: a kind of method of utilizing coking organic castoff and weakly caking coal for the raw material production moulded coal, utilize existing coking process to produce moulded coal, after weakly caking coal and coking organic castoff carried out pre-treatment, all adopt weakly caking coal and coking organic castoff to be mixed and made into moulded coal, the coking organic castoff in the moulded coal accounts for the 3%-20% of whole moulded coal weight; Moulded coal with enter coking by coke oven after common coke making and coal blending mixes, moulded coal is allocated the amount of coke oven into less than going into 10% of stove coal gross weight; Described weakly caking coal refers to bottle coal and the lean coal that coking is used, and the weight ratio of bottle coal and lean coal is controlled at 1.5~2.2; The weakly caking coal pre-treatment is meant the selective crushing processing of weakly caking coal, and crushing granularity requirement will account for more than 95% less than the particulate coal of 1mm.

Briquette production method of the present invention, main performing step comprises: the coking organic castoff that collect from the coke-oven plant (1) mixes pre-treatment earlier; (2) weakly caking coal that coking is used carries out pre-treatment; (3) pretreated coking organic castoff and weakly caking coal are carried out the quantitative and even mixing; (4) material behind the uniform mixing is carried out forming process, make the moulded coal that coking is used; (5) moulded coal is mixed into coking by coke oven according to certain proportioning and coking coal.

Described coking organic castoff comprises acid tar, coke tar refuse and biochemical sludge three class wastes simultaneously, and their blending ratio is 1:1:1; The coking organic castoff pre-treatment, comprise the processing that mixes of the settlement separate processing of the tar of acid tar and ammonium sulfate solution and coke tar refuse and biochemical sludge, be equipped with the tracing thermal-insulating device in the coking organic castoff preprocessing process, finally control the mixture temperature out between 40 ℃-80 ℃.

Weakly caking coal mixes the employing two-stage and mixes with coking organic castoff, guarantee the material uniform mixing; The first step adopts axial reciprocating type mixing, and three-dimensional full the mixing adopted in the second stage, and wherein the three-dimensional full blended time of the second stage was controlled at 3-10 minutes.

A kind of enforcement utilizes coking organic castoff and the weakly caking coal device systems for the raw material production coking briquette, and this system is made up of raw materials pretreatment system, mixing moulding system and coking system.Described raw materials pretreatment system mainly is made up of weakly caking coal shredder assembly, coking organic castoff mixing stirring device; Described mixing moulding system is made up of preliminary mixing device, uniform mixing device and shaper; Described coking system is existing coking system.

Device systems mode of connection of the present invention is: the coal dust conveying is connected with the coal dust crusher with metering device, coal dust crusher discharge port is connected with the feeding mouth of airtight coal dust e Foerderanlage, airtight coal dust e Foerderanlage discharge port is connected with the buffering batch can, and buffering batch can discharge port is connected with the coal dust feeding mouth of a mixer by feeding machine; The outlet that acid tar in the coking organic castoff prestores jar is connected with the auger tank of coke tar refuse and biochemical sludge, and the discharge port of auger tank is connected with the coking organic castoff feeding mouth of a mixer by fluid delivery system; The discharge port of a mixer is connected with second drum mixer by the mixture transfer roller, and the discharge port of second drum mixer is connected with shaper, and the shaper discharge port passes through the moulded coal transfer roller and directly is connected with main coal blending conveyor.

Device systems flow process of the present invention is described as: weakly caking coal enters weakly caking coal buffering storage tank after the independent fragmentation of shredder assembly, join in the preliminary mixing device through dosing and e Foerderanlage then; Coking organic castoff enters coking organic castoff buffering storage tank heat mixing in mixing stirring device after, join in the preliminary mixing device by dosing and e Foerderanlage then and tentatively mix with weakly caking coal, preliminary blended mixture enters the uniform mixing device and further mixes, mixed uniformly material enters the shaper extrusion molding, the moulded coal of making is transported to main coal blending belt with belt, goes into coking by coke oven with the normal coking coal in coke-oven plant to coal tower.

The invention has the beneficial effects as follows:

1) can realize the uniform mixing of various materials, improve the briquette molding rate and also improve briquet quality.

2) utilize coking organic castoff to produce moulded coal, realize the thorough harmless treatment and the recycling of coking organic castoff as briquette binder.

3) adopt the briquetted coal blending coking technology can reach the effect of improving coke quality.

4) utilize weakly caking coal processing moulded coal, can reach the effect of remarkable reduction coking cost.

Description of drawings

The invention will be further described below in conjunction with the drawings and specific embodiments.

Fig. 1 is a process flow sheet of the present invention.

Among the figure: 1. coal dust is carried and metering device, 2. coal dust crusher, 3. airtight coal dust e Foerderanlage, 4. buffering batch can, 5. mixer, 6. prestore jar, 7. auger tank of acid tar, 8. fluid conveyer, 9. mixture transfer roller, 10. second drum mixer, 11. shapers, 12. the moulded coal transfer roller, 13. main coal blending conveyors.

Embodiment

A kind of method of utilizing coking organic castoff and weakly caking coal for the raw material production coking briquette that the present invention relates to, implementation step comprises: the coking organic castoff that collect from the coke-oven plant (1) mixes pre-treatment earlier; (2) weakly caking coal that coking is used carries out pre-treatment; (3) pretreated coking organic castoff and weakly caking coal are carried out the quantitative and even mixing; (4) material behind the uniform mixing is carried out forming process, make the moulded coal that coking is used; (5) moulded coal is mixed into coking by coke oven according to certain proportioning and coking coal.After weakly caking coal and coking organic castoff carried out pre-treatment, all adopt weakly caking coal and coking organic castoff to be mixed and made into moulded coal, moulded coal with enter coking by coke oven after common coke making and coal blending mixes.Described coking organic castoff mainly comprises any organic wastes such as coke tar refuse, acid tar, biochemical sludge and coal-tar pitch that the coke-oven plant produces.Described coking organic castoff pretreatment process is meant heating and combination treatment, and wherein heating is to adopt outer heating, and heating and temperature control is between 40 ℃-80 ℃; It is to adopt the mechanical stirring mode that several organic wastes are mixed that coking organic castoff mixes.Described weakly caking coal mainly refers to bottle coal and the lean coal that coking is used, and the proportioning of bottle coal and lean coal roughly is controlled at 1.5~2.2.Described weakly caking coal pre-treatment is meant the selective crushing processing, and crushing granularity requirement will account for more than 95% less than the 1mm particulate coal.Described pretreated coking organic castoff mixes with the weakly caking coal quantitative and even, and wherein the coking organic castoff binding agent accounts for the 3%-20% of whole moulded coal weight, and moulded coal is allocated the amount of coke oven into less than going into 10% of stove coal gross weight.

A kind of device systems that utilizes coking organic castoff and weakly caking coal for the raw material production coking briquette, this system is made up of raw materials pretreatment system, mixing moulding system and coking system.Described raw materials pretreatment system mainly is made up of weakly caking coal shredder assembly and coking organic castoff mixing stirring device; Described mixing moulding system is made up of preliminary mixing device, uniform mixing device and shaper; Described coking system is existing coking system.The flow process of total system can be described as in conjunction with Fig. 1: weakly caking coal enters coal dust crusher 2 through the coal dust conveying with metering device 1 and carries out selective crushing, broken back coal dust is by airtight coal dust e Foerderanlage 3,, through metering device coal dust is sent in mixer 5 then to 4 feedings of weakly caking coal buffering storage tank by airtight coal dust e Foerderanlage 3; Acid tar in the coking organic castoff prestores by acid tar and jars 6 prestores, after removing ammonium sulfate solution, flow directly into the auger tank 7 of coke tar refuse and biochemical sludge, and in auger tank 7, stir mixed with coke tar refuse and biochemical sludge, fluidity mixture material after mixing, inject a mixer 5 by fluid conveyer 8, in a mixer 5, finish the first mixing of binding agent and coal dust, first mixed material is by mixture transfer roller 9, enter second drum mixer 10 and finish the secondary material uniform mixing, material behind the secondary uniform mixing directly enters shaper 11, form the coking briquette prod, this briquette prod directly is transported to main coal blending conveyor 13 by moulded coal transfer roller 12, by main coal blending conveyor 13 moulded coal and coke making and coal blending is transported to coking in the coke oven simultaneously at last.

Feeding device can be selected oscillating feeder, star-like material feeder and screw feeder for use in described coal dust conveying and the metering device 1, and e Foerderanlage can be selected rotary conveyor, chapelet or embedded scraper transporter for use.Described coal dust crusher 2 can be selected Raymond mill, hammer mill, Vertical Mill, straight-through mill etc. for use.Pre-storage tank 6 of described acid tar and mixing stirring device 7 outsides are provided with heating unit; But type of heating high-temperature steam, high-temperature hot oil, high-temperature flue gas are made the outer well heater and the electric heater of thermal source; The motor machine alr mode is adopted in the stirring of mixing stirring device 7.Pre-storage tank 6 of described acid tar and mixing stirring device 7 are necessary for acid-proof corrosive material and make.Described fluid conveyer 8 can be selected acid-proof corrosive worm conveyor and acid-proof corrosive slush pump, bitumenpump etc. for use, and mass transport speed adopts the motor frequency conversion device to regulate the fluid foods operational throughput.A described mixer 5 can adopt biaxial rneader and worm conveyor.Described second drum mixer 10 can be selected vertical kneading machine and ribbon mixer for use.Described mixture transfer roller 9 can be selected rotary conveyor, chapelet and worm conveyor for use.Described shaper 11 is the high pressure egg-type coal briquetting machine.

Utilize the industrial production coke oven to experimentize, the experiment hole count is 5 holes.The raw material that experiment is adopted comprises weakly caking coal (bottle coal and lean coal), the common coke making and coal blending in coke-oven plant and coking organic castoff.Bottle coal, lean coal and coking organic castoff 60%:30%:10% are by weight proportion made moulded coal, moulded coal is mixed into common coke making and coal blending respectively in 3% and 5% ratio produces the coke oven test.Test coke sample is by national standard test coke quality index.Comprise: shatter strength (M 40) and wear resisting property index (M 10), reactive (CRI) and post-reaction strength (CSR).About material proportion and test coke strenth test result as shown in table 1.

Table one: different schemes gained coke strenth index

Sequence number The moulded coal amount of allocating into/% M 40/% M 10/% CRI/% CSR/% 1 0 66.4 8.2 23.56 63.82 2 3 69.6 6.8 21.89 65.72 3 5 70.8 7.6 22.30 66.60

The present invention is features simple and practical process not only, facility investment is few, can move continuously, the efficient height can thoroughly solve the organic useless admittedly problem of environment pollution caused in coke-oven plant, turns waste into wealth, and the present invention to adopt coking organic solid useless and weakly caking coal be the coking of raw material production of shaped coal, obtain the high-quality metallurgical coke that intensity index obviously improves, saved the coking cost greatly, for new approach has been opened up in the Sustainable development of coking industry from now on.

Claims (4)

1. method of utilizing coking organic castoff and weakly caking coal to produce moulded coal, utilize existing coking process to produce moulded coal, it is characterized in that: after weakly caking coal and coking organic castoff are carried out pre-treatment, all adopt weakly caking coal and coking organic castoff to be mixed and made into moulded coal, the coking organic castoff in the moulded coal accounts for 3%~20% of whole moulded coal weight; Moulded coal with enter coking by coke oven after common coke making and coal blending mixes, moulded coal is allocated the amount of coke oven into less than going into 10% of stove coal gross weight; Described weakly caking coal refers to bottle coal and the lean coal that coking is used, and the weight ratio of bottle coal and lean coal is controlled at 1.5~2.2; The weakly caking coal pre-treatment is meant the selective crushing processing of weakly caking coal, and crushing granularity requirement will account for more than 95% less than the particulate coal of 1mm.
2. the method for utilizing coking organic castoff and weakly caking coal to produce moulded coal according to claim 1, it is characterized in that: described coking organic castoff comprises acid tar, coke tar refuse and biochemical sludge three class wastes simultaneously, and their blending ratio is 1:1:1; The coking organic castoff pre-treatment comprises the processing that mixes of the settlement separate processing of the tar of acid tar and ammonium sulfate solution and coke tar refuse and biochemical sludge, be equipped with the tracing thermal-insulating device in the coking organic castoff preprocessing process, finally control the mixture temperature out between 40 ℃~80 ℃.
3. the method for utilizing coking organic castoff and weakly caking coal to produce moulded coal according to claim 1 is characterized in that: described weakly caking coal mixes the employing two-stage and mixes with coking organic castoff, guarantee the material uniform mixing; The first step adopts axial reciprocating type mixing, and three-dimensional full the mixing adopted in the second stage, and wherein the three-dimensional full blended time of the second stage was controlled at 3~10 minutes.
4. implement the described system that utilizes coking organic castoff and weakly caking coal to produce moulded coal of claim 1 for one kind, comprise raw materials pretreatment system, formation system and coking system, it is characterized in that: also comprise the raw material mixing system; Coal dust is carried and is connected with coal dust crusher (2) with metering device (1), coal dust crusher (2) discharge port is connected with the feeding mouth of airtight coal dust e Foerderanlage (3), airtight coal dust e Foerderanlage (3) discharge port is connected with buffering batch can (4), and buffering batch can (4) discharge port is connected by the coal dust feeding mouth of feeding machine with a mixer (5); The prestore outlet of jar (6) of acid tar in the coking organic castoff is connected with the auger tank (7) of coke tar refuse and biochemical sludge, and the discharge port of auger tank (7) passes through fluid delivery system (8) and is connected with the coking organic castoff feeding mouth of a mixer (5); The discharge port of a mixer (5) is connected with second drum mixer (10) by mixture transfer roller (9), the discharge port of second drum mixer (10) is connected with shaper (11), and shaper (11) discharge port passes through moulded coal transfer roller (12) and directly is connected with main coal blending conveyor (13).
CNB2005100929663A 2005-08-26 2005-08-26 Utilize coking organic castoff and weakly caking coal to produce the method and system of moulded coal CN100537725C (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102492507A (en) * 2011-11-16 2012-06-13 安徽天之源型煤有限公司 Casting briquette and production method
CN102643699A (en) * 2012-05-09 2012-08-22 黑龙江科技学院 Application of coked sludge serving as formed coal adhesive
CN102766497A (en) * 2012-06-28 2012-11-07 北京国能普华环保工程技术有限公司 Lignite semi-coke powder shaping device
CN103666619A (en) * 2013-12-11 2014-03-26 辽宁科技大学 Method for preparing shaped coal for coking by adding industrial discarded binding agent
CN103952167B (en) * 2014-05-14 2015-12-02 中国科学院城市环境研究所 A kind of energy saving and environment friendly low moisture coke making process and system
CN104109547A (en) * 2014-06-26 2014-10-22 内蒙古鄂尔多斯电力冶金股份有限公司氯碱化工分公司 Coke powder press ball device and coke powder press ball technology
CN104152204A (en) * 2014-08-19 2014-11-19 安徽乾海环保科技有限公司 Method for producing civil clean coal briquette by carbocoal and system for realizing method thereof
CN104593027A (en) * 2014-12-30 2015-05-06 金能科技股份有限公司 Method for treating organic waste residues in sorbic acid production
CN104893777A (en) * 2015-07-08 2015-09-09 太原钢城企业公司化工总厂 Coal briquette making and coal briquette coking production process by using coking wastes
CN109022077A (en) * 2018-10-12 2018-12-18 贵州大学 A method of briquette binder is prepared using coking waste

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
利用焦油渣作粘结剂制取工业型煤的工厂化. 金邦新,富童心,孟庆波,傅晓鞍,何凤菊.冶金能源,第8卷第6期. 1989
利用焦油渣作粘结剂制取工业型煤的工厂化. 金邦新,富童心,孟庆波,傅晓鞍,何凤菊.冶金能源,第8卷第6期. 1989 *

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Address after: 100041 Beijing Shijingshan District Shougang Corporation

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Patentee before: Capital Iron & Steel General Company