CN203440308U - Device for preparing needle coke by using maltha as raw material - Google Patents
Device for preparing needle coke by using maltha as raw material Download PDFInfo
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- CN203440308U CN203440308U CN201320566791.5U CN201320566791U CN203440308U CN 203440308 U CN203440308 U CN 203440308U CN 201320566791 U CN201320566791 U CN 201320566791U CN 203440308 U CN203440308 U CN 203440308U
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Abstract
The utility model discloses a device for preparing needle coke by using maltha as a raw material. The device comprises a purifier, a separator, a light distiller, a heavy distiller, a coking reactor, a calcinator, a flash evaporator and a condenser. Flash distillation treatment on the dissolvent-removed heavy asphalt is performed via arranging the flash evaporator; obtained flash distillation oil gas is condensated by the condenser to obtain heavy flash distillation oil, further, the heavy flash distillation oil and the light distiller are mixed, coked via the coking reactor and burned by the calcinator to obtain the needle coke, as a result, effective components which can be used for preparing the needle coke in heavy components can be fully utilized, and the yield of the needle coke is improved. In addition, the device is long in continuous running time, high in the dissolvent recovery rate during production, low in sulphur content of the obtained needle coke, and good in metallic luster.
Description
Technical field
The utility model relates to a kind of viscid bitumen that utilizes and prepares the device of needle coke for raw material, belongs to STUDY OF NEEDLE COKE TECHNOLOGY field.
Background technology
Needle coke is mainly used in making Graphite Electrodes, the Graphite Electrodes of made has that resistance to sudden heating is strong, physical strength is high, oxidation susceptibility is good, consumption of electrode is low and the advantage such as the current density that allows is large, when the Graphite Electrodes of therefore needle coke being made is used for Electric furnace steel making, can make to shorten tap to tap time 30-50%, more than economize on electricity 10-50%, economic benefit is very remarkable.
Needle coke is different according to raw materials for production, is divided into two kinds of coal-based needle coke and petroleum needle cokes.Wherein, coal-based needle coke is to take coal tar soft asphalt as raw material; Petroleum needle coke is that to take petroleum residual oil, pressure tar etc. be raw material, by delayed coking and calcining, makes.Along with industrialized development, the lighting of the in short supply and refining of petroleum of crude resources causes petroleum needle coke, and there is lack of raw materials, and the relatively abundant coal resources of China tar resource especially, for coal-based needle coke, produce sufficient raw material is provided, established the dominant position of coal-based needle coke in China's needle coke is produced, so the research of coal-based needle coke becomes industrial hot spot undoubtedly.
The preparation of coal-based needle coke need to be passed through raw materials pretreatment, delayed coking and three production processes of calcining.Raw materials pretreatment is the gordian technique of preparing coal-based needle coke, is determining the quality of needle coke quality.Due in needle coke Coking Process, the quinoline insolubles (QI) containing in coal-based needle coke raw material viscid bitumen is easily attached to unstable mesophasespherule around, hindered melting and growing up of mesophasespherule, cause generating the needle coke that texture is walked to become better or fibrous texture is good, therefore need in raw materials pretreatment operation, remove quinoline insolubles (QI).As Chinese patent literature CN202766477U discloses a kind of device that removes quinoline insolubles in coal-tar pitch, mainly comprise tube furnace, supercritical extraction tower, light phase stripping tower and heavy phase stripping tower etc., after coal-tar pitch and solvent, in tube furnace, heat the laggard overcritical extraction tower that enters, excessive solvent adds supercritical extraction tower again, the supernatant liquid of supercritical extraction tower enters light phase stripping tower and obtains solvent and refined asphaltic bitumen, and lower floor's liquid of supercritical extraction tower enters heavy phase stripping tower and obtains solvent and high softening point bitumen.Take refined asphaltic bitumen as raw material production needle coke, guaranteed the formation of needle coke.
In above-mentioned technology, to adding the coal-tar pitch of solvent, extract, quinoline insolubles is deposited in lower floor's liquid, the low refined asphaltic bitumen of quinoline insolubles content that supernatant liquid stripping is gone out is produced needle coke as coking raw material, has improved the quality of needle coke.But the effective constituent that can be used for preparing needle coke in the high softening point bitumen that lower floor's liquid obtains through stripping, especially high softening point bitumen is not fully used, and has wasted raw material, the yield that causes needle coke to be prepared is very low.
Summary of the invention
For this reason, can be used in the high softening point bitumen of the coal-tar pitch that technical problem to be solved in the utility model is to add in prior art solvent after extraction and stripping, prepares the effective constituent of needle coke and is not fully used, while causing using coal-tar pitch to prepare needle coke, yield is low, and then proposes the viscid bitumen of take that a kind of yield is high and prepare the device of needle coke as raw material.
For solving the problems of the technologies described above, the utility model provides a kind of viscid bitumen that utilizes to prepare the device of needle coke for raw material, comprising:
Purifier, is provided with viscid bitumen import and viscid bitumen outlet;
Separator, is provided with viscid bitumen import, light component outlet and heavy component outlet, and the viscid bitumen solution inlet port of described separator is connected with the viscid bitumen import of described purifier;
Lightweight distiller, is provided with light component import, and bottom is provided with light asphalt outlet, and top is provided with evaporant outlet, and the light component import of described lightweight distiller is connected with the outlet of the light component of described separator;
Heavy distiller, is provided with heavy component import, and bottom is provided with heavy bitumen outlet, and top is provided with evaporant outlet, and the heavy component import of described heavy distiller is connected with the outlet of the heavy component of described separator;
Coking reactor, is provided with opening for feed and green coke outlet, and top is provided with evaporant outlet, and the opening for feed of described coking reactor is connected with the light asphalt outlet of described lightweight distiller;
Calcining furnace, is provided with import and needle coke outlet, and the import of described calcining furnace is connected with the outlet of the green coke of described coking reactor;
Flasher, is provided with heavy bitumen import, and top is provided with evaporant outlet, and the heavy bitumen import of described flasher is connected with the outlet of the heavy bitumen of described heavy distiller;
Condenser, is provided with import, condensation product outlet and uncondensable gas outlet, and the import of described condenser is connected with the outlet of the evaporant of described flasher, and the condensation product outlet of described condenser is connected with the opening for feed of described coking reactor.
Described purifier comprises the line mixer that is provided with the solvent trough of solvent inlet and solvent outlet and is provided with solvent inlet, viscid bitumen import and mixture outlet, the solvent outlet of described solvent trough is connected with the solvent inlet of described line mixer, and the mixture outlet of described line mixer is connected with the viscid bitumen solution inlet port of described separator.
Further, also comprise the second condenser, the solvent inlet of described solvent trough is connected with the evaporant outlet of described lightweight distiller and the evaporant outlet of described heavy distiller by described the second condenser simultaneously.
Further, also comprise separation column, be provided with opening for feed, top is provided with evaporant outlet, bottom is provided with refined asphaltic bitumen outlet, the opening for feed of described separation column is connected with the condensation product outlet of described condenser and the light asphalt outlet of described lightweight distiller simultaneously, and the refined asphaltic bitumen outlet of described separation column is connected with the opening for feed of described coking reactor.
Further, described separation column bottom or bottom are provided with the import of coking evaporant, and the import of described coking evaporant is connected with the evaporant outlet of described coking reactor; In described separation column, the top of described coking evaporant import is provided with and is subject to liquid bath, along being subject to liquid bath wall to be provided with coker light oil to described separation column extension, exports.
Further, also comprise flash distillation oil groove, the condensation product outlet of described condenser is connected with the opening for feed of described separation column by described flash distillation oil groove.
Further, also comprise primary heater, the refined asphaltic bitumen outlet of described separation column is connected with the opening for feed of described coking reactor by described primary heater.
Further, also comprise secondary heater, the 3rd well heater and the 4th well heater, the light component outlet of described separator is connected with the light component import of described lightweight distiller by described secondary heater, the heavy component outlet of described separator is connected with the heavy component import of described heavy distiller by described the 3rd well heater, and the heavy bitumen outlet of described heavy distiller is connected with the heavy bitumen import of described flasher by described the 4th well heater.
In described flasher, be provided with feeding fabric glassware.
Technique scheme of the present utility model has the following advantages compared to existing technology:
(1) viscid bitumen that utilizes of the present utility model is prepared the device of needle coke for raw material, comprise purifier, separator, lightweight distiller, heavy distiller, coking reactor, calcining furnace, flasher and condenser, by flasher is set, heavy bitumen is carried out to flash distillation processing, the flash distillation oil gas obtaining obtains heavy flash oil after condenser condenses, and then heavy flash oil is obtained to needle coke through coking reactor coking and calcining furnace calcining, make the active principle that can prepare needle coke in heavy component namely heavy flash oil be fully utilized, while using the device that utilizes viscid bitumen to prepare needle coke for raw material of the present utility model to prepare needle coke, the yield of needle coke is up to 47-50%.And, by the heavy flash distillation oil phase of the light asphalt except desolventizing and process flash distillation is mixed, can avoid the phenomenon of slagging scorification in heat or coking, complete assembly is moved continuously.The device that utilizes viscid bitumen to prepare needle coke for raw material described in the utility model can move more than 10 months continuously after tested, has greatly surmounted the continuous operating time that the device of needle coke is prepared in this area.Further, by heavy bitumen is carried out to high temperature flash distillation and condensation, the S in heavy component can form non-condensing gas, and discharge by the uncondensable gas outlet of condenser, reduced the S content in heavy flash oil, made the needle coke S content made low, metalluster is good.
(2) viscid bitumen that utilizes of the present utility model is prepared the device of needle coke for raw material, by being provided with lightweight distiller and heavy distiller, light component through separated and heavy component are distilled to the solvent of removing in light component and heavy component, and be further provided with the second condenser and water-and-oil separator recycles solvent, the rate of recovery of solvent can reach 96-97%, has effectively saved cost.
Accompanying drawing explanation
For content of the present utility model is more likely to be clearly understood, according to specific embodiment of the utility model also by reference to the accompanying drawings, the utility model is described in further detail, wherein below
Fig. 1 is that the viscid bitumen that utilizes of the present utility model is prepared the apparatus structure schematic diagram of needle coke for raw material;
In figure, Reference numeral is expressed as: 1-solvent trough; 2-line mixer; 3-separator; 4-secondary heater; 5-lightweight distiller; 6-the second condenser; 7-the 3rd well heater; 8-heavy distiller; 9-the 4th well heater; 10-flasher; 11-condenser; 12-flash distillation oil groove; 13-primary heater; 14-separation column; 15-coking reactor; 16-calcining furnace; 17-feedstock pump; 18-heavy bitumen pump; 19-bitumenpump; 20-refined asphaltic bitumen pump; 21-heavy component pump.
Embodiment
For technical characterictic of the present utility model, object and effect being had more clearly, understand, now contrast accompanying drawing embodiment of the present utility model is described.
As shown in Figure 1, a kind of viscid bitumen that utilizes of the present utility model is prepared the device of needle coke for raw material, comprise purifier, be provided with viscid bitumen import and viscid bitumen outlet, the effect of described purifier is the impurity of removing in viscid bitumen, in the present embodiment, described purifier comprises and is provided with the solvent trough 1 of solvent inlet and solvent outlet and is provided with solvent inlet, the line mixer 2 of viscid bitumen import and mixture outlet, in described solvent trough, hold solubilized and get rid of the solvent of impurity in viscid bitumen, the solvent outlet of described solvent trough 1 is connected with the solvent inlet of described line mixer 2, preferred described line mixer 2 is 3 pipeline configurations that series connection is connected, to carry out three grades of mixing, separator 3, described separator 3 can use in prior art any can be by mixture separation the equipment for light component and heavy component, in the present embodiment, described separator 3 is extractor, be provided with viscid bitumen solution inlet port, light component outlet and heavy component outlet, the viscid bitumen solution inlet port of described extractor is connected with the mixture outlet of described line mixer 2, described extractor comprises that sidewall is provided with the interior chimney filter of extracting of filter opening and is sheathed on the supervisor of the extracting outside chimney filter in extracting, in extracting supervisor and extracting, between chimney filter, form enclosed space, in described extracting, in chimney filter, be provided with stirring powder crushing device, during use, the mixture of wanting extracting is conveyed into chimney filter in extracting, start stirring powder crushing device, light component enters the enclosed space between chimney filter in extracting supervisor and extracting by chimney filter in extracting, enter again light component outlet, and heavy component chimney filter bottom in extracting enters heavy component outlet, lightweight distiller 5, described lightweight distiller 5 can use any commercially available type of the prior art, in the present embodiment, described lightweight distiller 5 is plate tower, be provided with light component import, bottom is provided with light asphalt outlet, and top is provided with evaporant outlet, and the light component import of described lightweight distiller 5 is connected with the outlet of the light component of described separator 3, heavy distiller 8, described heavy distiller 8 can use any commercially available type of the prior art, in the present embodiment, described heavy distiller 8 is plate tower, be provided with heavy component import, bottom is provided with heavy bitumen outlet, and top is provided with evaporant outlet, and the heavy component import of described heavy distiller 8 is connected with the outlet of the heavy component of described separator 3, coking reactor 15, in the present embodiment, described coking reactor 15 is made as two tower bodies in parallel, is provided with opening for feed and green coke outlet, top is provided with evaporant outlet, and the opening for feed of described coking reactor 15 is connected with the light asphalt outlet of described lightweight distiller 5, calcining furnace 16, described calcining furnace 16 can be any commercially available type of the prior art, and in the present embodiment, described calcining furnace 16 is can-type calcine furnace, be provided with import and needle coke outlet, the import of described calcining furnace 16 is connected with the green coke outlet of described coking reactor 15, flasher 10, in the present embodiment, described flasher 10 is flashing tower, be provided with heavy bitumen import, top is provided with evaporant outlet, and top is columnar structured, and bottom is conical structure, inside is provided with feeding fabric glassware, and the heavy bitumen import of described flasher 10 is connected with the outlet of the heavy bitumen of described heavy distiller 8, condenser 11, described condenser 11 is shell and tube cooler, be provided with import, condensation product outlet and uncondensable gas outlet, the import of described condenser 11 is connected with the evaporant outlet of described flasher 10, and the condensation product outlet of described condenser 11 is connected with the opening for feed of described coking reactor 15.
On the basis of above-described embodiment, also comprise the second condenser 6, described the second condenser 6 is shell and tube cooler, and the solvent inlet of described solvent trough 1 is connected with the evaporant outlet of described lightweight distiller 5 and the evaporant outlet of described heavy distiller 8 by described the second condenser 6 simultaneously.
Further, also comprise separation column 14, be provided with opening for feed, top is provided with evaporant outlet, bottom is provided with refined asphaltic bitumen outlet, the opening for feed of described separation column 14 is connected with the condensation product outlet of described condenser 11 and the light asphalt outlet of described lightweight distiller 5 simultaneously, and the refined asphaltic bitumen outlet of described separation column 14 is connected with the opening for feed of described coking reactor 15.Preferably, the below of described separation column 14 bottoms or bottom, described opening for feed is provided with the outlet of coking evaporant, and described coking evaporant outlet is connected with the evaporant outlet of described coking reactor 15; In described separation column 14, the top of described opening for feed is provided with and is subject to liquid bath, along described in be subject to liquid bath wall to be provided with coker light oil to described separation column 14 extensions to export; The dividing plate that also comprises tool hole, cross in described separation column 14, described separation column 14 is divided into the two portions up and down that are connected by control, described dividing plate is between the import of described coking evaporant and described opening for feed, and between the outlet of the import of described coking evaporant and coker light oil; The hole of described dividing plate extends upward and is provided with standpipe.During use, the light asphalt that described lightweight distiller 5 produces is entered in described separation column 14 and is accumulated on described dividing plate by opening for feed as raw material with the heavy flash oil through described condenser 11 condensations, raw material liquid level on dividing plate is during higher than described riser top ends, raw material arrives the below of dividing plate by standpipe, now carry out mixed heat transfer with the coking evaporant entering in described separation column 14 by the import of described coking evaporant, heavy mixture (exquisite pitch) is deposited on separation column 14 bottoms, the middle matter of different molecular weight size, lightweight mixture rises by standpipe and is deposited on different column plates, the part components condense of coking evaporant is discharged through the outlet of described coker light oil in being subject to liquid bath described, the not condensation portion of coking evaporant is discharged through the evaporant outlet of described separation column 14.
Further, also comprise flash distillation oil groove 12, described flash distillation oil groove 12 is used for storing condensed heavy flash oil, and the condensation product outlet of described condenser 11 is connected with the opening for feed of described separation column 14 by described flash distillation oil groove 12.
Further, also comprise primary heater 13, the refined asphaltic bitumen outlet of described separation column 14 is connected with the opening for feed of described coking reactor 15 by described primary heater 13; Further, on the pipeline between described primary heater 13 and described separation column 17, be also provided with water vapour import.
Further, also comprise secondary heater 4, the 3rd well heater 7 and the 4th well heater 9, the light component outlet of described separator 3 is connected with the light component import of described lightweight distiller 5 by described secondary heater 4, the heavy component outlet of described separator 3 is connected with the heavy component import of described heavy distiller 8 by described the 3rd well heater 7, and the heavy bitumen outlet of described heavy distiller 8 is connected with the heavy bitumen import of described flasher 10 by described the 4th well heater 9.
It should be noted that, primary heater described in above-described embodiment 13, secondary heater 4, the 3rd well heater 7 and the 4th well heater 9 can use any commercially available type of the prior art, in the present embodiment, described primary heater 13, secondary heater 4, the 3rd well heater 7 and the 4th well heater 9 are vertical coil process furnace.
The operational process of device that utilizes viscid bitumen to prepare needle coke for raw material described in the utility model is as follows:
Viscid bitumen is sent in line mixer 2 and is mixed with the solvent phase that enters line mixer 2 by feedstock pump 17, and the mixture after mixing enters separator 3 by pipeline and is separated into light component and heavy component; Described light component enters lightweight distiller 5, described lightweight distiller 5 bottom extraction light asphalts after secondary heater 4 heating; Described heavy component enters heavy distillation tower 8 after sending into the 3rd well heater 7 heating by heavy component pump 21, described heavy distiller 8 bottom extraction heavy bitumens, described heavy bitumen enters flasher 10 after sending into the 3rd well heater 9 heating by heavy bitumen pump 18, described flasher 10 top extraction flash distillation oil gas enter condenser 11, and the flash oil air cooling heavy flash oil that congeals into enters flash distillation oil groove 12; Light asphalt and heavy flash oil are mixed in proportion and enter separation column 14, described separation column 14 bottom extraction refined asphaltic bitumens are sent into primary heater 13 by refined asphaltic bitumen pump 20, pass into a certain proportion of water vapour simultaneously, refined asphaltic bitumen through heating enters coking reactor 15 coking formation green cokes, and green coke enters calcining furnace 16 and forms needle coke through calcining.
In said process, the evaporant that described lightweight distiller 5 and described heavy distiller 8 tops distill out carries out solvent recuperation through the second condenser 6 condensations; In described condenser 11, uncooled uncondensable gas exports discharge by uncondensable gas; The cooking gas that discharge at described coking reactor 15 tops enters separation column 14 as heat transferring medium by pipeline and carries out heat exchange; The evaporant producing in described separation column 14 and coker light oil export by evaporant respectively and coker light oil outlet is discharged; The high QI pitch of described flasher 10 bottom extraction is discharged by bitumenpump 19.
Obviously, above-described embodiment is only for example is clearly described, not the restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all embodiments.And the apparent variation of being extended out thus or change are still among the protection domain in the invention.
Claims (9)
1. utilize viscid bitumen to prepare the device of needle coke for raw material, comprising:
Purifier, is provided with viscid bitumen import and viscid bitumen outlet;
Separator (3), is provided with viscid bitumen solution inlet port, light component outlet and heavy component outlet, and the viscid bitumen solution inlet port of described separator (3) is connected with the outlet of the viscid bitumen of described purifier;
Lightweight distiller (5), is provided with light component import, and bottom is provided with light asphalt outlet, and top is provided with evaporant outlet, and the light component import of described lightweight distiller (5) is connected with the light component outlet of described separator (3);
Heavy distiller (8), is provided with heavy component import, and bottom is provided with heavy bitumen outlet, and top is provided with evaporant outlet, and the heavy component import of described heavy distiller (8) is connected with the heavy component outlet of described separator (3);
Coking reactor (15), is provided with opening for feed and green coke outlet, and top is provided with evaporant outlet, and the opening for feed of described coking reactor (15) is connected with the light asphalt outlet of described lightweight distiller (5);
Calcining furnace (16), is provided with import and needle coke outlet, and the import of described calcining furnace (16) is connected with the green coke outlet of described coking reactor (15);
It is characterized in that, also comprise
Flasher (10), is provided with heavy bitumen import, and top is provided with evaporant outlet, and the heavy bitumen import of described flasher (10) is connected with the heavy bitumen outlet of described heavy distiller (8);
Condenser (11), be provided with import, condensation product outlet and uncondensable gas outlet, the import of described condenser (11) is connected with the evaporant outlet of described flasher (10), and the condensation product outlet of described condenser (11) is connected with the opening for feed of described coking reactor (15).
2. device according to claim 1, it is characterized in that, described purifier comprises the solvent trough (1) that is provided with solvent inlet and solvent outlet and the line mixer (2) that is provided with solvent inlet, viscid bitumen import and mixture outlet, the solvent outlet of described solvent trough (1) is connected with the solvent inlet of described line mixer (2), and the mixture outlet of described line mixer (2) is connected with the viscid bitumen solution inlet port of described separator (3).
3. device according to claim 2, it is characterized in that, also comprise the second condenser (6), the solvent inlet of described solvent trough (1) is connected with the evaporant outlet of described lightweight distiller (5) and the evaporant outlet of described heavy distiller (8) by described the second condenser (6) simultaneously.
4. according to the arbitrary described device of claim 1-3, it is characterized in that, also comprise separation column (14), be provided with opening for feed, top is provided with evaporant outlet, bottom is provided with refined asphaltic bitumen outlet, and the opening for feed of described separation column (14) is connected with the condensation product outlet of described condenser (11) and the light asphalt outlet of described lightweight distiller (5) simultaneously, and the refined asphaltic bitumen outlet of described separation column (14) is connected with the opening for feed of described coking reactor (15).
5. device according to claim 4, is characterized in that, described separation column (14) bottom or bottom are provided with the import of coking evaporant, and the import of described coking evaporant is connected with the evaporant outlet of described coking reactor (15); In described separation column (14), the top of described coking evaporant import is provided with and is subject to liquid bath, along being subject to liquid bath wall to be provided with coker light oil outlet to described separation column (14) extension.
6. device according to claim 5, is characterized in that, also comprises flash distillation oil groove (12), and the condensation product outlet of described condenser (11) is connected with the opening for feed of described separation column (14) by described flash distillation oil groove (12).
7. device according to claim 6, is characterized in that, also comprises primary heater (13), and the refined asphaltic bitumen outlet of described separation column (14) is connected with the opening for feed of described coking reactor (15) by described primary heater (13).
8. according to the device described in claim 1 or 2 or 3 or 5 or 6 or 7, it is characterized in that, also comprise secondary heater (4), the 3rd well heater (9) and the 4th well heater (12), the light component outlet of described separator (3) is connected with the light component import of described lightweight distiller (6) by described secondary heater (4), the heavy component outlet of described separator (3) is connected with the heavy component import of described heavy distiller (11) by described the 3rd well heater (9), the heavy bitumen outlet of described heavy distiller (11) is connected with the heavy bitumen import of described flasher (13) by described the 4th well heater (12).
9. device according to claim 8, is characterized in that, described flasher is provided with feeding fabric glassware in (10).
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| CN201320566791.5U CN203440308U (en) | 2013-09-12 | 2013-09-12 | Device for preparing needle coke by using maltha as raw material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109439353A (en) * | 2018-11-19 | 2019-03-08 | 山西中科化美科技有限责任公司 | A kind of coking calcining integration system of refined bitumen is for needle coke technique |
| CN109939461A (en) * | 2019-03-25 | 2019-06-28 | 山东益大新材料有限公司 | It is a kind of for producing the laboratory extracting method of the colloid blend component of needle coke |
| CN111655823A (en) * | 2018-01-31 | 2020-09-11 | 环球油品有限责任公司 | Process and apparatus for deasphalting and asphalt conversion |
-
2013
- 2013-09-12 CN CN201320566791.5U patent/CN203440308U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111655823A (en) * | 2018-01-31 | 2020-09-11 | 环球油品有限责任公司 | Process and apparatus for deasphalting and asphalt conversion |
| CN109439353A (en) * | 2018-11-19 | 2019-03-08 | 山西中科化美科技有限责任公司 | A kind of coking calcining integration system of refined bitumen is for needle coke technique |
| CN109939461A (en) * | 2019-03-25 | 2019-06-28 | 山东益大新材料有限公司 | It is a kind of for producing the laboratory extracting method of the colloid blend component of needle coke |
| CN109939461B (en) * | 2019-03-25 | 2021-04-13 | 山东益大新材料股份有限公司 | Laboratory extraction method of colloid blending component for preparing needle coke |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140219 |
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| CX01 | Expiry of patent term |