CN1364853A - Process for producing anode asphalt for refining aluminium - Google Patents
Process for producing anode asphalt for refining aluminium Download PDFInfo
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- CN1364853A CN1364853A CN 01144146 CN01144146A CN1364853A CN 1364853 A CN1364853 A CN 1364853A CN 01144146 CN01144146 CN 01144146 CN 01144146 A CN01144146 A CN 01144146A CN 1364853 A CN1364853 A CN 1364853A
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Abstract
The production process of anode asphalt for refining aluminium includes the hot polymerization of medium temperature asphalt as liquid material, additon of flash distillation oil, cooling to form packing and other steps. In the present invention, single reactor hot polymerization and returned flash distillation oil mixing are adopted in producing high quality anode asphalt. The product has wide application.
Description
Technical field
The present invention relates to metallurgy industry pitch, particularly relate to the production method that is fit to anode asphalt for refining aluminium.
Technical background
At present, in metallurgical industry, the Graphite Electrodes that Electric furnace steel making is used, aluminium metallurgy are generally coal-tar pitch with anode and general carbon electrode etc. with binding agent.Coal-tar pitch is the by product coal tar enriched material at the bottom of distillation obtains tower in the coking industry normally, it forms very complicated mixture by macromole polycyclic aromatic hydrocarbons, condensed-nuclei aromatics and heterocyclic system etc., the softening temperature of this coal-tar pitch is low, and resin content is low, the fugitive constituent height, toluene insolubles is low, coking value is low etc., and by the electrode product that it is produced, than resistance big Yao oxidation and poor heat stability, physical strength is low.Aluminum smelting industry consumes high with this coal-tar pitch, environmental pollution is serious, do not satisfy the requirement with binders for electrodes such as aluminum smelting industry far away, must handle or the needs that could satisfy metallurgy industry counter electrode tackiness agents such as growing aluminum smelting industry, Steel industry are handled in modification.United States Patent (USP) 5120424 discloses a kind ofly to be handled coal-tar pitch with the high frequency ripple and carries out upgrading and handle, and improves its softening temperature and resin content etc.The flat 3-277690A of JP discloses a kind of with paraffinic hydrocarbon or aromatic solvent, and in solvent critical temperature to 370 ℃, pressure is that the emergent pressure of solvent is to 100Kg/cm
2, in extracting the district, extract the light fraction of removing in the coal-tar pitch, thereby improve the softening temperature of coal-tar pitch, fixed carbon content and β-resin content etc.Aforesaid method technical process operation and equipment complexity, the cost height, quality product still can not satisfy the requirement as the growing antianode tackiness agent of aluminum smelting industry.
Summary of the invention
The objective of the invention is to overcome above-mentioned weak point and satisfy market demand, through research and development and suitability for industrialized production practice for many years, it is short that exploitation has flow process, operate simple and easy, less investment, cost is low, the production method of the anode asphalt for refining aluminium of quality product excellence.
The production method of anode asphalt for refining aluminium provided by the invention comprises following step mule: 1, the liquid mid-temperature pitch under 380-400 ℃ of temperature, stirs and carries out heated polymerizable in single reactor.2, with the product of step 1 in medial launder, add back and convert flash oil, thorough mixing is even, flash oil and liquid mid-temperature pitch weight ratio are 0.8-2.5: 100, are preferably 1-2: 100, more preferably 1.2-1.5: 100.3, the product with step 2 becomes solid phase prod by the cooling forming apparatus cools.
In the production method according to anode asphalt for refining aluminium provided by the invention, described liquid mid-temperature pitch is that by product coal tar by coking industry is without fractionation, being heated to 400-410 ℃ through tube furnace enters second evaporator and flashes off more than the carbolineum low component fraction, remaining is mid-temperature pitch, its softening temperature is 80-90 ℃, and toluene insolubles content (BI) is 15-25%, and quinoline insolubles content (QI) is≤10%, fugitive constituent 58-68%, moisture content 5.0%.
In reactor, but the liquid mid-temperature pitch makes the aromatic substance generation thermopolymerization and the condensation polymerization reaction of thermopolymerization in the pitch or polycondensation through heating, cause molecular weight to increase, solvend transforms to insolubles, its conversion rate and temperature and time are closely related, for example the toluene solvend mainly is converted into toluene insolubles before 375 ℃, this moment β-resin to be converted into the speed of time ecological α-resin very low.When temperature rose to 400 ℃, β-resin is converted into the formation speed of secondary α-resin obviously to be accelerated, and just surpassed the growing amount of toluene insolubles behind the several hrs.When temperature further improved, quinoline insolubles sharply increased, and the ratio of β-resin peaks very soon, and straight line descends then.Temperature is carried out thermopolymerization in 380-400 ℃ of temperature ranges, make that primary β-resin part is converted into secondary α-resin in the pitch, primary α-resin part is converted into secondary β-resin, thereby make toluene insolubles in the pitch, the growth of quinoline insolubles and β-Shu Zhi Sui, reach optimum balance, its bonding component content is improved.Heat polymerization process is a successive processes, sends into medial launder through Continuous Heat polymeric mid-temperature pitch; Simultaneously in polymerization process, the flash oil that flashes off from the top of reactor is cooled to flash oil through condensate cooler and returns and convert in medial launder.
Returning in the medial launder of step 2 and converting flash oil is that mid-temperature pitch carries out producing after the thermopolymerization in reactor, convert flash oil and regulate quality product with returning, the special anode asphalt softening temperature of regulating, guarantee its softening temperature less than 100 ℃, the fine solution improved the also contradiction of its growth of Sui of the softening point value of toluene insolubles value.It is to become the liquid gravity flow to enter medial launder by flash oil condensation cooling back that the medial launder mixing is taked, and flows into to be entered by pipeline, and the pipeline that enters in the medial launder is drilled with a plurality of pores, can be equably with medial launder in liquid heated bitumen mixing.Concoct uniform heated bitumen through flash oil in the medial launder and be delivered to the pitch header tank, be cooled to the solid anodes asphaltic products. on the pitch crocodile from flowing into then by submerged pump.
The anode asphalt softening temperature of being made by production method of the present invention is less than 100 ℃, and toluene insolubles is greater than 25%, quinoline insolubles≤8.5, β-resin 〉=18%.
CContent 〉=50%, ash≤0.3%, it is widely used in various anode asphalts in the field of smelting.
The production method characteristics of anode asphalt for refining aluminium provided by the invention:
1, adopt single still thermal polymerization process, technical process is simple, easy handling.
2, adopt unique returning to convert the flash oil technology, regulate quality product, effectively reliable.
3, less investment approximately is 1/2nd of other method producer, and floor space is little, is other 6-8/one.
4, quality product excellence is anode asphalt of new generation, and suitability is strong, and purposes is wide.
Description of drawings
Fig. 1 is an anode asphalt for refining aluminium technological process of production simplified schematic diagram.
1, reactor 2, process furnace 3, agitator 4, medial launder
5, submerged pump 6, condensate cooler 7, header tank 8, pitch sheet-leveling machine
Specific embodiments
The present invention further specifies the present invention in conjunction with the accompanying drawings with the following example, but protection domain of the present invention is not limited to embodiment.
Embodiment 1
Mid-temperature pitch is dropped in the reactor 1 continuously, in the controlled temperature 380-400 ℃ scope, reaction time 7.0 to 7.5 hours, under agitation carry out thermopolymerization, medial launder 4 is sent in the continuous discharging of liquid mid-temperature pitch through thermopolymerization, convert in medial launder for 6 times through condensate cooler at the flash oil that reactor carries out flashing off in the heat polymerization process, it is flash oil that flash oil returns the amount of converting: mid-temperature pitch is 1.2: 100, mix the back and send into header tank 7 by submerged pump 5, gravity flow is gone into pitch sheet-leveling machine 8 cooling forming granular solids anode asphalt products then.This anode asphalt quality index is:
Softening temperature, ℃ 96.0 toluene insolubleses, %28.9 quinoline insolubles, %8.0
β-resin, %19.1 C content, %52.4 ash content, %0.14
Softening temperature, ℃ 95.1 toluene insolubleses, %29.4 quinoline insolubles, %8.1
β-resin, %18.6 C content, %53.1 ash content, %0.15
To enter in the reactor 1 from the mid-temperature pitch of second evaporator, in reactor, be heated to 380-400 ℃ of temperature, under agitation carried out heat polymerization 7.0 hours, reacted then pitch is sent into pitch medial launder 4, and the flash oil that mid-temperature pitch carries out flashing off in the polymerization process in reactor returns after condensate cooler 6 coolings to be converted in medial launder.Returning the flash oil of converting is 1.2: 100 with adding raw material mid-temperature pitch ratio, mixes the back and sends into header tank 7 by submerged pump 5, and gravity flow is gone into pitch sheet-leveling machine 8 cooling forming solid anodes asphaltic products.es then.This anode asphalt quality index is:
Softening temperature, ℃ 96.8 toluene insolubleses, %28.6 quinoline insolubles, %7.8
β-resin, %21.0 C content, %54 ash content, %0.13
Claims (6)
1, a kind of production method of anode asphalt for refining aluminium, this method comprises the following steps:
(1) the liquid mid-temperature pitch under 380-400 ℃ of temperature, stirs and carries out heated polymerizable in single reactor;
(2) product of step 1 is added back in medial launder convert flash oil, thorough mixing is even, and flash oil and liquid mid-temperature pitch weight ratio are: 0.8-2.5: 100;
(3) product with step 2 becomes solid phase prod by the cooling forming apparatus cools.
2, according to the production method of the anode asphalt for refining aluminium of claim 1, it is characterized in that described liquid mid-temperature pitch is that coal tar is heated to 400-410 ℃ of mid-temperature pitch that enters after second evaporator flashes off the above fraction of carbolineum through tube furnace.
3, according to the production method of the anode asphalt for refining aluminium of claim 1, it is characterized in that converting flash oil described time and liquid mid-temperature pitch weight ratio is 1-2: 100.
4, according to the production method of the anode asphalt for refining aluminium of claim 3, it is characterized in that converting flash oil described time and liquid mid-temperature pitch weight ratio is 1.2-1.5: 100.
5,, it is characterized in that the liquid material that is mixed of described step 2 medial launder is delivered to header tank by submerged pump according to the production method of claim 1 anode asphalt for refining aluminium.
6, the anode asphalt that obtains according to the production method of each anode asphalt for refining aluminium of claim 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011441461A CN1147564C (en) | 2001-12-13 | 2001-12-13 | Process for producing anode asphalt for refining aluminium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011441461A CN1147564C (en) | 2001-12-13 | 2001-12-13 | Process for producing anode asphalt for refining aluminium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1364853A true CN1364853A (en) | 2002-08-21 |
| CN1147564C CN1147564C (en) | 2004-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011441461A Expired - Fee Related CN1147564C (en) | 2001-12-13 | 2001-12-13 | Process for producing anode asphalt for refining aluminium |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1333034C (en) * | 2006-04-29 | 2007-08-22 | 中钢集团鞍山热能研究院 | Process for producing binder for blast furnace microporous carbon brick |
| CN1970689B (en) * | 2006-12-13 | 2010-05-12 | 上海奥韦通工程技术有限公司 | Process for preparing modified asphalt |
| CN101289624B (en) * | 2008-06-03 | 2010-09-29 | 山西宏特煤化工有限公司 | Process for producing moderate temperature modified bitumen by continuously pressurizing and hot-polymerizing at two stages connected in series |
| CN102311747A (en) * | 2011-08-30 | 2012-01-11 | 河南宝舜化工科技有限公司 | Furnace-kettle type modified pitch production system and production process |
| CN103741168A (en) * | 2013-12-27 | 2014-04-23 | 中国神华能源股份有限公司 | Method for preparing prebaked anode used in aluminum production by using anthracite |
| CN106221668A (en) * | 2016-09-07 | 2016-12-14 | 辽宁石油化工大学 | A kind of process preparing high-quality electrode pitch binding agent |
| CN110016358A (en) * | 2019-03-18 | 2019-07-16 | 中国铝业股份有限公司 | A kind of processing and application method of aluminium cathode charcoal roasting gas cleaning tar |
-
2001
- 2001-12-13 CN CNB011441461A patent/CN1147564C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1333034C (en) * | 2006-04-29 | 2007-08-22 | 中钢集团鞍山热能研究院 | Process for producing binder for blast furnace microporous carbon brick |
| CN1970689B (en) * | 2006-12-13 | 2010-05-12 | 上海奥韦通工程技术有限公司 | Process for preparing modified asphalt |
| CN101289624B (en) * | 2008-06-03 | 2010-09-29 | 山西宏特煤化工有限公司 | Process for producing moderate temperature modified bitumen by continuously pressurizing and hot-polymerizing at two stages connected in series |
| CN102311747A (en) * | 2011-08-30 | 2012-01-11 | 河南宝舜化工科技有限公司 | Furnace-kettle type modified pitch production system and production process |
| CN103741168A (en) * | 2013-12-27 | 2014-04-23 | 中国神华能源股份有限公司 | Method for preparing prebaked anode used in aluminum production by using anthracite |
| CN106221668A (en) * | 2016-09-07 | 2016-12-14 | 辽宁石油化工大学 | A kind of process preparing high-quality electrode pitch binding agent |
| CN110016358A (en) * | 2019-03-18 | 2019-07-16 | 中国铝业股份有限公司 | A kind of processing and application method of aluminium cathode charcoal roasting gas cleaning tar |
| CN110016358B (en) * | 2019-03-18 | 2021-05-07 | 中国铝业股份有限公司 | Treatment and use method for purifying tar by roasting flue gas of cathode carbon block for aluminum |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1147564C (en) | 2004-04-28 |
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Assignee: Heilongjiang Heihua Limited by Share Ltd Assignor: Heilongjiang Chemial Group Co., Ltd., Heilongjiang Contract fulfillment period: 2009.9.20 to 2026.5.8 contract change Contract record no.: 2009230000041 Denomination of invention: Process for producing anode asphalt for refining aluminium Granted publication date: 20040428 License type: Exclusive license Record date: 20091028 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.9.20 TO 2026.5.8; CHANGE OF CONTRACT Name of requester: HEILONGJIANG HEIHUA CO., LTD. Effective date: 20091028 |
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Granted publication date: 20040428 Termination date: 20121213 |