CN1502675A - Method and system for improving metallurgical coke strength by utilizing waste plastics - Google Patents
Method and system for improving metallurgical coke strength by utilizing waste plastics Download PDFInfo
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- CN1502675A CN1502675A CNA02149021XA CN02149021A CN1502675A CN 1502675 A CN1502675 A CN 1502675A CN A02149021X A CNA02149021X A CN A02149021XA CN 02149021 A CN02149021 A CN 02149021A CN 1502675 A CN1502675 A CN 1502675A
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Abstract
The present invention relates to a method for raising strength of metallurgical coke and its system. Said invention adopts traditional coking process and equipment, and adds waste plastics in the course of coking process, and is characterized by that after the waste plastics and additive are processed, they are added into coking furnace to implement co-coking with coking coal, at the same time of that the waste plastics are charred at high temp., and converted into coke, tar and gas the coke quality can be improved, crushing strength of coke M40 can be raised, abrasive resistance index of coke M10 is reduced, coke reactivity CPI is reduced and coke postreaction strength can be raised. Said system includes waste plastics processing system, additive and waste plastics mixing system, waste plastics and additive mixture and coking coal mixing system and traditional coking system.
Description
Described field:
The invention belongs to method, especially plastic waste that relates to Treatment of Waste Plastics technology and equipment and raising metallurgical coke intensity and the method and apparatus that coal cocoaking improves coke strenth.
Background technology:
Along with the fast development of world economy and science and technology, the raising day by day of people's living standard, the continuous quickening of urbanization process, the output of municipal solid wastes sharply increases.According to statistics, the annual production of the present domestic waste of China has surpassed 1.5 hundred million tons, and annual just with 8%～10% speed increment.The city of China nearly 2/3 is among the rubbish encirclement.Plastic waste in China's domestic waste accounts for 4%～10% of rubbish total amount, and annual production reaches 500～6,000,000 tons, and annual just with nearly 8%～9% speed increment.
At present, China's garbage treatment disposal technology accounts for 79.2% of total treatment capacity still based on sanitary landfill and air storage, and next adopts compost treatment, accounts for 18.8% of total treatment capacity, adopts incineration technology on a small quantity, accounts for 2% of total treatment capacity.The recycling amount of China's plastic waste only accounts for 10%, and about 90% plastic waste is by landfill and burning.Therefore, how to realize plastic waste recycling and harmless treatment, become the focus of world attention problem.
Utilize coke oven treatment of waste plastics technology to have less investment, treatment scale is big, 100% realizes the recycling of plastic waste and produces advantage such as secondary pollution hardly, be able to extensive concern in the world, and Japan is successfully applied to production practice with this technology.Utilizing in the patent of coke oven treatment of waste plastics existing, is that coke strenth does not reduce after utilizing the technology of relative complex to guarantee to add plastic waste mostly.It is less relatively really to utilize plastic waste to improve the patent report of coke quality, but these patents also exist process system comparatively complicated, defectives such as coke quality improvement degree is limited, as Japanese Patent, the patent No. is P2000-53970A, mentions and utilizes mink cell focus and plastic waste Hybrid Heating, makes it aggregation processing, as the binding agent of coking coal, to improve the method for coke quality.Must between 300 ℃-400 ℃, carry out the heated polymerizable processing to plastic waste and mink cell focus in this method, and then mix with coal, the technology relative complex, and also energy consumption is higher.Japanese Patent, the patent No. is P2001-240868A, mention the method for binding agent that a kind of plastic waste surface coverage one deck behind curing molding is made up of mink cell focuses such as pitches to avoid coke strenth to reduce, this method need be cured forming processes with plastic waste, simultaneously with mink cell focus pitch heat packs on the plastic waste surface, the process system relative complex increases facility investment and running cost, and STRENGTH ON COKE quality improvement DeGrain.The domestic patented technology report that does not also have about plastic waste and coal cocoaking treatment method and system, Chinese patent, the patent No. is CN1224043, discloses a kind of plastic waste that adds in coal, and copyrolysis is to increase the method for tar yield and minimizing moisture under nitrogen or coke-oven gas atmosphere.This method is based on results of laboratory, treatment temp is 650 ℃, belong to subzero treatment technology, do not consider plastic waste collection, processing and the plastic waste process system such as coking processing in high temperature coke oven in the industrial application process, the influence of also not mentioned plastic waste STRENGTH ON COKE intensity.
Summary of the invention:
At the external existing coke oven treatment of waste plastics patented technology technology relative complex of utilizing, coke strenth defective such as fail to be significantly improved, the object of the present invention is to provide a kind of technology simple, can significantly increase the method and system of coke strenth and reduction coke reactivity simultaneously.
Above-mentioned purpose and task are achieved by the following technical solution: a kind of method of utilizing plastic waste to improve metallurgical coke intensity, adopt traditional coking process method, in the process of coking, add plastic waste, the specific implementation step comprises: the plastic waste that (1) sorts out from domestic refuse transports the coke-oven plant to after press-fiting moulding; (2) plastic waste and solid additive hybrid process are handled; (3) mixture of plastic waste and additive and coke making and coal blending are mixed into the stove co-carbonization; (4) recycling of co-carbonization and product thereof.
Described plastic waste comprises the plastic waste of any kind of, especially can be suitable for reluctant mixed waste plastic in the domestic waste.
Described additive can be waste oil and the petroleum pitch that coal tar, coal system pitch and petroleum industry produce, and especially refers to coal-tar pitch and petroleum pitch.
The blending ratio of plastic waste and additive is controlled at 0.5-1, and the ratio control of plastic waste and additive agent mixture and coal is 0.01-0.04.
Utilize belt carry to realize mixing of plastic waste and additive, mixed material enters plastics special use crusher simultaneously and carries out break process, and the raw meal particle size scope after the fragmentation is controlled between the 10mm-20mm, realizes the uniform mixing of plastic waste and additive simultaneously.
Utilize rotary conveyor and the belt electronic scale position between coal transporting trestle top and broken coal machine quantitatively to add the coke toughener to coal conveyer belt.
Described co-carbonization and product thereof reclaim and utilize method to be entirely identical to traditional coking process and technology.
A kind of described system that utilizes plastic waste to improve the method for metallurgical coke intensity of claim 1 that realizes, comprise traditional coking equipment, it is characterized in that comprising coke toughener hybrid process system, coke toughener and coke making and coal blending quantitative and even mixing system, coke toughener and coal cocoaking system and co-carbonization product recovery system.
Described coke toughener hybrid process system, comprise plastic waste apron feeder, additive load hopper, defeated material conveyor, crusher, coke toughener belt conveyer, the outlet of plastic waste apron feeder is connected with defeated material conveyor, the top of defeated material conveyor is provided with the additive load hopper, the discharge end of defeated material conveyor is connected with the crusher inlet, and the discharge port of crusher links to each other with coke toughener belt conveyer.
Described coke toughener and coke making and coal blending quantitative and even mixing system comprise weigh constant feeder and coal transporting trestle, inlet and the coke toughener belt conveyor outlet of constant feeder of wherein weighing links to each other, and the below that the constant feeder of weighing exports is connected to the coal conveyer belt of coal transporting trestle.
Described coke toughener and coal cocoaking system and co-carbonization product recovery system are utilized traditional coking device, tar recovery system and gas purification and retrieving arrangement fully.
The principal feature of this method is traditional coke making process and modern waste plastics recovery and plastic processing combination, when utilizing traditional metallurgical coking technology and the extensive harmless treatment of plastic processing technology " white pollution " and realizing 100% recycling of plastic waste, there are synergistic effect in plastic waste and additive in process of coking, significantly improve coke quality.Mainly being a little of this method:
(1) utilizes plastic waste to improve metallurgical coke intensity, increase the pulverized coal injection ratio, reduce the coke ratio of blast-furnace smelting, save a large amount of coking coals and reduce ironmaking cost.
(2) can directly utilize traditional coke making process system, need not traditional coking process is transformed, invest lessly, running cost is low, the construction period is short, has the favorable industrial application prospect.
(3) utilize waste or used plastics instead of part coking coal, both effectively solved " white pollution " problem, saved coking coal resource again, produced new social benefit.
Description of drawings: accompanying drawing 1 is total system technical process of the present invention and equipment drawing.
Illustration: 1. beater; 2. belt; 3. additive load hopper; 4. tramp iron separator; 5. the special-purpose crusher of plastic waste; 6. belt; 7. buffering hopper; 8. the material feeder of weighing; 9. the coal conveyer belt of coal transporting trestle.
Specific embodiment:
Utilize plastic waste to improve the method for metallurgical coke intensity, comprise that plastic waste collection method, plastic waste and additive hybrid process method, plastic waste and additive and coke making and coal blending quantitative and even are mixed into stove method, plastic waste and additive agent mixture material and coal cocoaking method and co-carbonization method for product recovery.Wherein the plastic waste collection method has: (1) in the Office Area, ground such as commercial zone, campus, resident living sub-district carry out and artificially collect and the sorting plastic waste; (2) collect recovery company from plastics-production, processing, sale and plastic waste and carry out the collection and the sorting of plastic waste; (3) method that combines by mechanical sorting and artificial separation from domestic waste sorting station, transfer point and comprehensive garbage disposal field is collected plastic waste.The plastic waste working method mainly takes breaking method to carry out processing treatment, and constitutes the coke toughener with the additive uniform mixing.The coke toughener realizes that by Weighing feeder and belt carrying method itself and coal quantitative and even are mixed into stove.Plastic waste and additive agent mixture material and coal cocoaking and co-carbonization method for product recovery adopt traditional coal-blending coking and process matched therewith method thereof fully.
The implementation process of aforesaid method is at first by artificially collecting or mechanical sorting, finishes the collection of plastic waste raw material.The plastic waste of collecting transports the coke toughener job shop of coke-oven plant to, with form the coke toughener after additive mixes break process, carry by Weighing feeder and belt, position behind coal transporting trestle top and broken coal machine is sneaked into this coke toughener quantitative and even on the coal conveyer belt of coal transporting trestle, and being mixed into coking by coke oven with coke making and coal blending, the coking product comprises that coke, tar, coal gas and ammoniacal liquor etc. adopt traditional coke making process to recycle fully.
The method that adopts above-mentioned plastic waste and coal cocoaking to handle, plastic waste that the ultimate principle of this method is crossed processing treatment and additive are by a certain percentage with after coal mixes, place traditional pit kiln to carry out high temperature carbonization, plastic waste is converted into can be used for metallurgical high grade coke, can be used as the tar of liquid fuel and industrial chemicals and can be used as clean high performance fuel and the high-quality coal gas of chemical industry synthetic raw gas.Plastic waste wherein and additive with the coal cocoaking process in have synergistic effect, STRENGTH ON COKE generates the effect played binding agent, makes coke strenth obviously improve.
Realization utilizes plastic waste to improve the system of metallurgical coke intensity method, and this system mainly is made up of with coal cocoaking system and co-carbonization product recovery and processing system garbage collection system, plastic waste and additive hybrid process system, plastic waste and additive agent mixture material and coal quantitative and even mixing system, plastic waste and additive agent mixture material.Its technical process as shown in Figure 1.The implementation process of this system is described below in conjunction with Fig. 1: packing is shipped to the plastic waste of coke-oven plant's coke toughener production plant, break up through beater 1, give plastic waste special-purpose crusher 5 feedings through belt 2 transportation quantitative and even ground again, additive load hopper 3 is equipped with in belt 2 tops simultaneously, make additive quantitative and even ground add plastic waste belt 2, realize that plastic waste tentatively mixes on belt 2 with additive; Belt 2 ends are provided with tramp iron separator 4, and the metallic iron in the removal plastic waste is with the special-purpose crusher 5 of protection plastic waste.Plastic waste and additive are finished broken and the uniform mixing course of processing simultaneously in crusher 5, form the coke toughener.The coke toughener is transported to the buffering hopper 7 that is positioned at coal transporting trestle initiating terminal and broken coal machine exit end position by belt 6, and by the material feeder 8 quantitative and even blowings of weighing that cushion hopper 7 bottoms.This material dosing enters on the coal conveyer belt 9 of coal transporting trestle equably, and goes into stove by the upset realization coke toughener of coal conveyer belt 9 and the uniform mixing of coke making and coal blending.Coke toughener and coal enter coke oven and carry out the high temperature co-carbonization, and products therefrom carries out reclaiming clean by traditional coking product recovery and processing system to be handled, and this part system and traditional coke making process system are identical.
The equipment connection situation of total system is described below: the discharge port of beater 1 links to each other with belt 2 feeding ends, additive load hopper 3 is equipped with in top, belt 2 middle parts, belt 2 terminal tops are provided with tramp iron separator 4, belt 2 terminal below discharge ports are connected with the feeding mouth of the special-purpose crusher 5 of plastic waste, the discharge port of crusher 5 is connected with belt 6 feed ends, the terminal feeding mouth with buffering hopper 7 of the discharging of belt 6 is connected, the material feeder 8 of weighing is equipped with in the bottom of buffering hopper 7, the discharge port of material feeder 8 of weighing is positioned at the top of the coal conveyer belt 9 of original coal transporting trestle, and the initiating terminal of the coal conveyer belt 9 of coal transporting trestle is same as traditional coke making process and equipment fully with terminal connected system and equipment.
Utilize the 200kg testing coke oven to test, the specification of testing coke oven is: the effectively long 800mm of body of heater, and effective high 900mm, width are 450mm, and coal capacity 230kg (dry coal), coking time are 18 hours, and the charge of coke core temperature is greater than 950 ℃.The raw material that the present embodiment adopts comprises the plastic waste (HP) in Shoudu Iron and Steel Co coke making and coal blending (HC), tar-bitumen (HQ) and Beijing's domestic refuse; The raw material course of processing comprises plastic waste and mixing of tar-bitumen uniform mixing two procedures broken and that mix broken material and coke making and coal blending; The raw material that processes is added the simultaneous test of carrying out different schemes in the pit kiln, and test-results is as shown in table 1.
Table one:
| HQ accounts for the ratio (%) of HC | HP accounts for the ratio (%) of HC | ????CRI ????(％) | ????CSR ????(％) | |
| Comparative example 1 | ????0 | ????0 | ????28.9 | ????57.07 |
| Comparative example 2 | ????2 | ????0 | ????26.7 | ????60.05 |
| Comparative example 3 | ????0 | ????1 | ????32.46 | ????54.35 |
| Example 1 | ????2 | ????1 | ????24.14 | ????65.70 |
| Example 2 | ????1 | ????1 | ????27.08 | ????60.00 |
| Example 3 | ????2 | ????2 | ????28.13 | ????60.10 |
CRI and CSR represent coke reactivity and postreaction strength of coke respectively in the table.Comparative example 1 is represented 230kg dry coal coking result; Comparative example 2 and comparative example 3 represent the 230kg dry coal to add the 4.6kg tar-bitumen respectively and the 230kg dry coal adds 2.3kg plastic waste co-carbonization gained result; On behalf of the 230kg dry coal, example 1 add the 4.6kg tar-bitumen to add 2.3kg plastic waste co-carbonization gained result; On behalf of the 230kg dry coal, example 2 and example 3 add the 2.3kg tar-bitumen respectively to add 2.3kg plastic waste and 230kg dry coal and add the 4.6kg tar-bitumen and add 4.6kg plastic waste co-carbonization gained result;
Example 1 is an exemplary embodiments of the present invention, can obtain coke reactivity obviously reduction and the post-reaction strength remarkable high-quality metallurgical coke that raise with the simple fragmentation back of mixing of tar-bitumen with the coke making and coal blending co-carbonization by plastic waste, thereby realize target of the present invention.
Adopt raw material of the present invention by simple processing, can reach and utilize plastic waste significantly to improve coke quality, obviously reduce the effect of coke reactivity and remarkable rising postreaction strength of coke.Both effective treatment of waste plastics makes plastic waste be able to recycling and harmless treatment, improves coke quality again, increases the economic benefit of coking.
Claims (11)
1. method of utilizing plastic waste to improve metallurgical coke intensity, adopt traditional coking process method, it is characterized in that: add plastic waste in the process of coking, the specific implementation step comprises: the plastic waste that (1) sorts out from domestic refuse transports the coke-oven plant to after press-fiting moulding; (2) plastic waste and solid additive hybrid process are handled; (3) mixture of plastic waste and additive and coke making and coal blending are mixed into the stove co-carbonization; (4) recycling of co-carbonization and product thereof.
2. according to the described method of utilizing plastic waste to improve metallurgical coke intensity of claim 1, it is characterized in that: described plastic waste comprises the plastic waste of any kind of, especially can be suitable for reluctant mixed waste plastic in the domestic waste.
3, according to the described method of utilizing plastic waste to improve metallurgical coke intensity of claim 1, it is characterized in that: described additive can be waste oil and the petroleum pitch that coal tar, coal system pitch and petroleum industry produce, and especially refers to coal-tar pitch and petroleum pitch.
4, according to the described method of utilizing plastic waste to improve metallurgical coke intensity of claim 1, it is characterized in that: the blending ratio of plastic waste and additive is controlled at 0.5-1, and the ratio control of plastic waste and additive agent mixture and coal is 0.01-0.04.
5, according to the described method of utilizing plastic waste to improve metallurgical coke intensity of claim 1, it is characterized in that: utilize belt carry to realize mixing of plastic waste and additive, mixed material enters the special-purpose crusher of plastics simultaneously and carries out break process, raw meal particle size scope after the fragmentation is controlled between the 10mm-20mm, realizes the uniform mixing of plastic waste and additive simultaneously.
6, according to the described method of utilizing plastic waste to improve metallurgical coke intensity of claim 1, it is characterized in that: utilize rotary conveyor and the belt electronic scale position between coal transporting trestle top and broken coal machine quantitatively to add the coke toughener to coal conveyer belt.
7, according to the described method of utilizing plastic waste to improve metallurgical coke intensity of claim 1, it is characterized in that: described co-carbonization and product thereof reclaim and utilize method to be entirely identical to traditional coking process and technology.
8, a kind of described system that utilizes plastic waste to improve the method for metallurgical coke intensity of claim 1 that realizes, comprise traditional coking equipment, it is characterized in that comprising coke toughener hybrid process system, coke toughener and coke making and coal blending quantitative and even mixing system, coke toughener and coal cocoaking system and co-carbonization product recovery system.
9, it is characterized in that according to the described system that utilizes plastic waste to improve the method for metallurgical coke intensity of claim 8: described coke toughener hybrid process system, comprise plastic waste apron feeder, additive load hopper, defeated material conveyor, crusher, coke toughener belt conveyer, the outlet of plastic waste apron feeder is connected with defeated material conveyor, the top of defeated material conveyor is provided with the additive load hopper, the discharge end of defeated material conveyor is connected with the crusher inlet, and the discharge port of crusher links to each other with coke toughener belt conveyer.
10, according to the described system that utilizes plastic waste to improve the method for metallurgical coke intensity of claim 8, it is characterized in that: described coke toughener and coke making and coal blending quantitative and even mixing system comprise weigh constant feeder and coal transporting trestle, inlet and the coke toughener belt conveyor outlet of constant feeder of wherein weighing links to each other, and the below that the constant feeder of weighing exports is connected to the coal conveyer belt of coal transporting trestle.
11, according to the described system that utilizes plastic waste to improve the method for metallurgical coke intensity of claim 8, it is characterized in that: described coke toughener and coal cocoaking system and co-carbonization product recovery system are utilized traditional coking device, tar recovery system and gas purification and retrieving arrangement fully.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101255342B (en) * | 2008-03-24 | 2010-12-01 | 莱芜钢铁股份有限公司 | Method for coal-blending coking by using waste plastics |
| CN101705104B (en) * | 2009-11-12 | 2012-08-22 | 重庆汉砧科技有限公司 | Pulverized coal activator and coking coal prepared from same |
| CN104232129A (en) * | 2014-09-11 | 2014-12-24 | 陈伟 | Method for preparing semicoke and tar by virtue of co-pyrolysis of organic waste and coal |
| CN104774632A (en) * | 2014-01-14 | 2015-07-15 | 宝山钢铁股份有限公司 | Method for producing coke by replacing part of coal with waste plastics |
| CN105950202A (en) * | 2016-07-04 | 2016-09-21 | 湖南华菱湘潭钢铁有限公司 | Method for blending coal with industrial waste oil during coking |
| CN106929067A (en) * | 2015-12-30 | 2017-07-07 | 北京三聚环保新材料股份有限公司 | A kind of process for upgrading of the moulded coal raw material for being coated with low-order coal and particulate matter |
| CN108913180A (en) * | 2018-06-15 | 2018-11-30 | 甘肃润源环境资源科技有限公司 | A kind of device and method of coke oven coal-blending coking commerical test prediction coke quality |
| CN111662735A (en) * | 2020-05-29 | 2020-09-15 | 鞍钢股份有限公司 | Coking and coal blending method for preparing metallurgical coke by using waste plastics |
| CN112143509A (en) * | 2020-09-11 | 2020-12-29 | 谷建兴 | Coal coking treatment method |
| CN114471308A (en) * | 2020-11-13 | 2022-05-13 | 石门县顺超科技发展有限公司 | Metallurgical powder carbon doping device |
-
2002
- 2002-11-20 CN CNA02149021XA patent/CN1502675A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101255342B (en) * | 2008-03-24 | 2010-12-01 | 莱芜钢铁股份有限公司 | Method for coal-blending coking by using waste plastics |
| CN101705104B (en) * | 2009-11-12 | 2012-08-22 | 重庆汉砧科技有限公司 | Pulverized coal activator and coking coal prepared from same |
| CN104774632A (en) * | 2014-01-14 | 2015-07-15 | 宝山钢铁股份有限公司 | Method for producing coke by replacing part of coal with waste plastics |
| CN104232129A (en) * | 2014-09-11 | 2014-12-24 | 陈伟 | Method for preparing semicoke and tar by virtue of co-pyrolysis of organic waste and coal |
| CN106929067A (en) * | 2015-12-30 | 2017-07-07 | 北京三聚环保新材料股份有限公司 | A kind of process for upgrading of the moulded coal raw material for being coated with low-order coal and particulate matter |
| CN105950202A (en) * | 2016-07-04 | 2016-09-21 | 湖南华菱湘潭钢铁有限公司 | Method for blending coal with industrial waste oil during coking |
| CN108913180A (en) * | 2018-06-15 | 2018-11-30 | 甘肃润源环境资源科技有限公司 | A kind of device and method of coke oven coal-blending coking commerical test prediction coke quality |
| CN111662735A (en) * | 2020-05-29 | 2020-09-15 | 鞍钢股份有限公司 | Coking and coal blending method for preparing metallurgical coke by using waste plastics |
| CN111662735B (en) * | 2020-05-29 | 2021-07-06 | 鞍钢股份有限公司 | Coking and coal blending method for preparing metallurgical coke by using waste plastics |
| CN112143509A (en) * | 2020-09-11 | 2020-12-29 | 谷建兴 | Coal coking treatment method |
| CN112143509B (en) * | 2020-09-11 | 2021-05-28 | 内蒙古汉生源科技有限公司 | Coal coking treatment method |
| CN114471308A (en) * | 2020-11-13 | 2022-05-13 | 石门县顺超科技发展有限公司 | Metallurgical powder carbon doping device |
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