CN1912053A - Preparation method of coal series needle shaped coke - Google Patents

Preparation method of coal series needle shaped coke Download PDF

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Publication number
CN1912053A
CN1912053A CN 200610048177 CN200610048177A CN1912053A CN 1912053 A CN1912053 A CN 1912053A CN 200610048177 CN200610048177 CN 200610048177 CN 200610048177 A CN200610048177 A CN 200610048177A CN 1912053 A CN1912053 A CN 1912053A
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CN
China
Prior art keywords
coking
polycondensation
raw
coal
needle coke
Prior art date
Application number
CN 200610048177
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Chinese (zh)
Inventor
武建国
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武建国
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Priority to CN 200610048177 priority Critical patent/CN1912053A/en
Publication of CN1912053A publication Critical patent/CN1912053A/en

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Abstract

The invention relates to a coal measure needle coke preparing method, belonging to a producing method for coking chemical industry, adopting coal pitch, coal tar, and heavy fractions of coal tar as raw materials, mixing, purifying, condensing, coking and calcining to make the coal measure needle coke, where the concrete steps comprise: (1) mixing; (2) purifying: heating the mixed raw materials by tubular furnace and eliminating quinoline insoluble substance by purifier through sedimentation, configuration and filtration; (3) condensing; (4) coking; and (5) calcining, making the coal measure needle coke. And it has advantages of high utilization ratio of raw materials, low production cost and good product quality.

Description

The preparation method of coal-based needle coke
Technical field
The present invention relates to a kind of preparation method of coal-based needle coke, it belongs to a kind of production method of coking chemical.
Background technology
Produce needle coke with coal-tar pitch or preparation pitch as raw material, its key is a purification of raw materials, for purifying raw material, in the present production method, all to adopt the method for vacuum flashing to handle raw material, as the patent No. is disclosed production method among ZL86100675, ZL00125962.8, the ZL00115132.0, all belongs to adopt vacuum flashing to purify the production method that raw material is promptly removed quinoline insolubles.Though, adopt the vacuum flashing method to obtain and purify raw material preferably, because its raw material availability is low, increased the production cost of needle coke.
Summary of the invention
The objective of the invention is to solve the technological difficulties that raw material availability is low and production cost is high that exist in the existing production method and a kind of raw material availability height is provided, production cost is low and the preparation method of the coal-based needle coke of good product quality.
The present invention addresses the above problem the technical scheme that adopts to be: the preparation method of coal-based needle coke, and adopting coal-tar pitch, coal tar, coal tar heavy duty fraction is raw material, makes coal-based needle coke through modulation, purification, polycondensation, coking, calcining, wherein:
(1) modulation: at first raw material is added in the mixed solvent groove and modulate;
(2) purify: the raw material after the modulation is by tubular oven and refining plant, make the raw material heating after, through sedimentation, centrifugal, cross and filter out quinoline insolubles;
(3) polycondensation: Recycle design is adopted in polycondensation, promptly purify raw material inlet pipe formula process furnace and heat laggard separation column, from separation column come out the back with after the purification raw material of not polycondensation mixes again inlet pipe formula process furnace heat, the material part of coming out from separation column at last is as the extraction of polycondensation fine fodder, the overwhelming majority is advanced the separation column circulation again, and the recycle ratio of extraction of polycondensation fine fodder and recirculation is 3/5, polycondensation process pressure 0.5-3.0Mpa, temperature 350-530 ℃, reaction times 5-18h;
(4) coking: the one way pyrogenic process is adopted in coking, i.e. the polycondensation fine fodder inlet pipe formula process furnace of extraction heats laggard coking tower coking coking, coking pressure 0.5-3.5Mpa, scorch time 5-18h;
(5) calcining: pyrogenic needle coke is put into pot furnace calcine, form finished product.
Because the present invention adopts carbolineum, middle oil preparation coal-tar pitch to make raw material, perhaps adopts coal tar, the modulation of coal tar heavy duty fraction to make raw material, helps removing of quinoline insolubles, and is favourable to the carbonizing production quality.Purification of raw materials adopts the raw material heating after diluted settlement, filtration, centrifugation make quinoline insolubles content<0.7%.After the pressurization polycondensation obtains to be rich in the clean material of condensed nucleus aromatic compound, obtain the byproduct of multiple coal tar distillate oil simultaneously respectively.The clean material that is rich in the condensed nucleus aromatic compound that adopts aforesaid method to obtain can make the condensed ring aromatic compound all be retained in the clean material, makes the intermediate phase transformation efficiency reach 100%, the needle coke good product quality after this fine fodder charing.Therefore, the present invention compares with background technology, has outstanding feature and advantage: (1) has improved raw material availability and quality product because the raw material that the present invention selects for use through optimizing the screening modulation, can make the intermediate phase transformation efficiency reach 100%.(2) in the fine fodder charing stage, owing to adopt conditions such as temperature is low, charging is many, air-flow is rapid by force and not, gained needle coke height anisotropy, long-width ratio increases, thermal expansivity reduces, and has improved quality product, and has reduced production cost.
Description of drawings
Accompanying drawing is a process flow diagram of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
As shown in drawings, the preparation method of the coal-based needle coke in the present embodiment, adopting coal-tar pitch, coal tar, coal tar heavy duty fraction is raw material, makes coal-based needle coke through modulation, purification, polycondensation, coking, calcining, wherein:
(1) modulation: at first coal-tar pitch, coal tar, coal tar heavy duty fraction raw material and auxiliary agent carbolineum, middle oil are added in the mixed solvent groove 1 and modulate;
(2) purify: the raw material after the modulation is sent into heating in the tubular oven 3 by feedstock pump 2, enters then in the refining plant 4, make after the heating raw material through sedimentation, centrifugal, cross and filter out quinoline insolubles, make quinoline insolubles<0.7%;
(3) polycondensation: Recycle design is adopted in polycondensation, promptly purify in the laggard separation column 5 of raw material inlet pipe formula process furnace 3 heating and carry out the part polycondensation, and isolate multiple fraction oil, the raw material of first polycondensation from separation column 5, come out the back with after the purification raw material of not polycondensation mixes again inlet pipe formula process furnace 3 heat, adding heat mixture enters in the separation column 5 once more, the material part of coming out from separation column 5 at last is as the extraction of polycondensation fine fodder, the overwhelming majority is advanced circulation in the separation column 5 again, the recycle ratio of extraction of polycondensation fine fodder and recirculation is 3/5, polycondensation process pressure 0.5-3.0Mpa, temperature 350-530 ℃, reaction times 5-18h, its reference mark is quinoline insolubles<1%;
(4) coking: the one way pyrogenic process is adopted in coking, i.e. the polycondensation fine fodder of extraction is through fine fodder groove 6 and the laggard coking tower 9 coking cokings of bitumenpump 7 inlet pipe formula process furnace, 8 heating, coking pressure 0.5-3.5Mpa, scorch time 5-18h;
(5) calcining: pyrogenic needle coke is added calcining in the pot furnace 11, promptly from the green coke adding pot furnace 11 that coking tower 9 bottoms obtain, carry out high-temperature calcination constant temperature and handle; Its condition is: warm 1300-1450 ℃ eventually, constant temperature time 3-9h, heat-up rate are 80-110 ℃/h; Help removing nitrogen compound like this, gained needle coke anisotropy is obviously, fiber direction intensity is big, particle K value is big, when extrusion molding, be orientated, and the electrode conductivuty height of making, CTE is low.
In this process flow sheet 10 is serial fractionating tank, and it connects with separation column 5 and coking tower 9 respectively, accepts multiple distillate oil.

Claims (1)

1, a kind of preparation method of coal-based needle coke, adopting coal-tar pitch, coal tar, coal tar heavy duty fraction is raw material, makes coal-based needle coke through modulation, purification, polycondensation, coking, calcining, it is characterized in that:
(1) modulation: at first raw material is added in the mixed solvent groove and modulate;
(2) purify: the raw material after the modulation is by tubular oven and refining plant, make the raw material heating after, through sedimentation, centrifugal, cross and filter out quinoline insolubles;
(3) polycondensation: Recycle design is adopted in polycondensation, promptly purify raw material inlet pipe formula process furnace and heat laggard separation column, from separation column come out the back with after the purification raw material of not polycondensation mixes again inlet pipe formula process furnace heat, the material part of coming out from separation column at last is as the extraction of polycondensation fine fodder, the overwhelming majority is advanced the separation column circulation again, and the recycle ratio of extraction of polycondensation fine fodder and recirculation is 3/5, polycondensation process pressure 0.5-3.0Mpa, temperature 350-530 ℃, reaction times 5-18h;
(4) coking: the one way pyrogenic process is adopted in coking, i.e. the polycondensation fine fodder inlet pipe formula process furnace of extraction heats laggard coking tower coking coking, coking pressure 0.5-3.5Mpa, scorch time 5-18h;
(5) calcining: pyrogenic needle coke is put into pot furnace calcine, form finished product.
CN 200610048177 2006-08-22 2006-08-22 Preparation method of coal series needle shaped coke CN1912053A (en)

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Application Number Priority Date Filing Date Title
CN 200610048177 CN1912053A (en) 2006-08-22 2006-08-22 Preparation method of coal series needle shaped coke

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CN1912053A true CN1912053A (en) 2007-02-14

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101302431A (en) * 2008-06-30 2008-11-12 邯郸市鑫宝煤化工有限公司 Preparation of asphalt for producing coal-based needle coke
CN101787298A (en) * 2009-01-23 2010-07-28 北京石油化工学院 Coal art pitch purification method
CN102965133A (en) * 2012-10-31 2013-03-13 山西永东化工股份有限公司 Production method of coal-based needle coke
CN103102891A (en) * 2013-01-30 2013-05-15 陕西煤业化工技术研究院有限责任公司 Preparation method of coal based needle coke
CN103113907A (en) * 2013-01-30 2013-05-22 陕西煤业化工技术研究院有限责任公司 Coal-based needle coke preparation process
CN103113908A (en) * 2013-01-30 2013-05-22 陕西煤业化工技术研究院有限责任公司 Coal-based needle coke preparation process
CN103421526A (en) * 2013-07-25 2013-12-04 张玮 Needle coke preparation method
CN109370642A (en) * 2018-11-19 2019-02-22 山西中科化美科技有限责任公司 A kind of delay coking process being used to prepare coal-based needle coke
CN109439367A (en) * 2018-11-19 2019-03-08 山西中科化美科技有限责任公司 It is a kind of to prepare needle coke technique using coal tar
CN109504415A (en) * 2018-12-04 2019-03-22 大同新成新材料股份有限公司 A kind of production method of needle coke

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101302431A (en) * 2008-06-30 2008-11-12 邯郸市鑫宝煤化工有限公司 Preparation of asphalt for producing coal-based needle coke
CN101787298A (en) * 2009-01-23 2010-07-28 北京石油化工学院 Coal art pitch purification method
CN101787298B (en) * 2009-01-23 2014-05-28 北京石油化工学院 Coal art pitch purification method
CN102965133B (en) * 2012-10-31 2014-10-15 山西永东化工股份有限公司 Production method of coal-based needle coke
CN102965133A (en) * 2012-10-31 2013-03-13 山西永东化工股份有限公司 Production method of coal-based needle coke
CN103113907A (en) * 2013-01-30 2013-05-22 陕西煤业化工技术研究院有限责任公司 Coal-based needle coke preparation process
CN103113908A (en) * 2013-01-30 2013-05-22 陕西煤业化工技术研究院有限责任公司 Coal-based needle coke preparation process
CN103113907B (en) * 2013-01-30 2014-06-18 陕西煤业化工技术研究院有限责任公司 Coal-based needle coke preparation process
CN103102891A (en) * 2013-01-30 2013-05-15 陕西煤业化工技术研究院有限责任公司 Preparation method of coal based needle coke
CN103421526A (en) * 2013-07-25 2013-12-04 张玮 Needle coke preparation method
CN109370642A (en) * 2018-11-19 2019-02-22 山西中科化美科技有限责任公司 A kind of delay coking process being used to prepare coal-based needle coke
CN109439367A (en) * 2018-11-19 2019-03-08 山西中科化美科技有限责任公司 It is a kind of to prepare needle coke technique using coal tar
CN109439367B (en) * 2018-11-19 2021-02-05 山西中科化美科技有限责任公司 Process for preparing needle coke by using coal tar
CN109504415A (en) * 2018-12-04 2019-03-22 大同新成新材料股份有限公司 A kind of production method of needle coke

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Open date: 20070214