CN111662735B - Coking and coal blending method for preparing metallurgical coke by using waste plastics - Google Patents
Coking and coal blending method for preparing metallurgical coke by using waste plastics Download PDFInfo
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- CN111662735B CN111662735B CN202010475972.1A CN202010475972A CN111662735B CN 111662735 B CN111662735 B CN 111662735B CN 202010475972 A CN202010475972 A CN 202010475972A CN 111662735 B CN111662735 B CN 111662735B
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
Abstract
The invention discloses a coking and coal blending method for preparing metallurgical coke by waste plastics, which improves the dosage ratio of high-sulfur and high-quality weak-cohesiveness coking coal by blending part of waste plastics to produce qualified metallurgical coke, wherein the blending coal comprises the following components in percentage by mass: 1/3 coking coal: 6% -18%, fat coal: 11% -27%, coking coal: 24% -40%, lean coking coal: 3-18%, high-sulfur, high-deterioration degree and weak caking coal: 15% -25%, waste plastics: 3 to 25 percent. The invention solves the problem that the coking coal with high sulfur and high quality degree and weak cohesiveness cannot be used in large proportion due to poor coking performance by fully utilizing the characteristics of low ash, low sulfur and cohesiveness of the waste plastics, optimizes the coal blending structure, reduces the coal blending cost and produces the qualified metallurgical coke.
Description
Technical Field
The invention belongs to the technical field of metallurgical raw materials and pretreatment, relates to a coking and coal blending technology, and particularly relates to a coking and coal blending method for producing metallurgical coke by adding waste plastics and cheap high-sulfur high-metamorphic weak caking coking coal and reducing the consumption of main coking coal through a reasonable coal blending control scheme.
Background
The coke as the raw material for iron making in China does not change in the last decades. The coal resources in China are rich, but the regional distribution is not uniform, the regional difference of coal types is large, and the single coal coking has a plurality of defects, and the coal usage amount shows the trend of increasing year by year along with the development of the steel industry, so that the phenomenon of shortage of the coal resources in the world at present is generated, the reduction speed of high-quality coking coal is more striking, in order to effectively and reasonably utilize the coal resources, solve the problems of single coal coking, ensure the quality of cokes with various purposes, and continuously develop a new coal blending coking process, so as to fully utilize the existing various coal resources, make up for deficiencies, relieve the current situation of the national and even coal resource shortage, and realize the sustainable development.
With the expansion of the production and application fields of plastics, the problem of environmental pollution is becoming serious, and the problem needs to be solved completely. At present, the common methods for waste plastic treatment include incineration power generation, accumulation, burying and recycling. However, burning waste plastics can generate carbon dioxide and dioxin; land occupation is realized in landfill, and the degradation period of waste plastics is long; the recycling is still in the development and research stage, so how to process waste plastics efficiently and without pollution has become one of the important topics for building environment-harmonized and resource-recycling society. The waste plastics have the characteristics of high carbon and hydrogen content, high heat productivity during combustion, basically no phosphorus, low sulfur content, low ash content and the like, so that the recycling value of the waste plastics is high.
Patent 201410016119.8 proposes a method for increasing the utilization of waste plastics by co-carbonizing waste plastics and coking coal, but the method has complicated preliminary treatment of waste plastics and low usage ratio of waste plastics. Patent 200810015606.7 proposes a method for coal blending and coking using waste plastics, which comprises charging waste plastics and coal tar pitch into a melting furnace at a mass ratio of 1:1.5-5, and co-melting at a temperature of 150-; and then cooling to 20-40 ℃, adding the waste plastic mixed powder obtained by crushing into the blended coal, wherein the adding amount of the waste plastic mixed powder is 2-6% of the total mass of the blended coal, crushing and mixing the blended coal doped with the plastic mixed powder by a crusher, and then conveying the crushed and mixed blended coal to a coke oven coal tower to finally enter a coke oven for coking. The method needs a large amount of early treatment processes for waste plastics and coal tar pitch, and has low use ratio and little significance for improving the coal blending structure. Patent 201410715512.6 proposes a coking coal blending method with lean coking coal, in which the blending proportion of the lean coking coal is up to 30%, the vitrinite reflectance distribution of the coking coal is continuous and normal, the ash content of the produced coke is below 12.5%, and the sulfur content is below 1.0%. However, this method does not involve a method of using waste plastics in combination.
In conclusion, if the physicochemical properties of the waste plastics can be fully utilized, the waste plastics are used for coal blending and coking in a large proportion, the dosage of the poor-quality, low-price, high-sulfur and high-quality weak-sticky coal is increased, the qualified metallurgical coke is prepared, the coke quality can be effectively stabilized, the coal blending cost is reduced, meanwhile, the problems of energy consumption and environment caused by the conventional waste plastic treatment method can be effectively solved, particularly, the feasibility is increased for the technical application, the urban dependence of enterprises is improved, and the survival capability of the enterprises is enhanced.
Disclosure of Invention
The invention aims to provide a coking and coal blending method for preparing metallurgical coke by using waste plastics, wherein a part of waste plastics and coking coal with high sulfur and high degree of deterioration and weak cohesiveness are blended in a coal blending scheme, the problem that the coking coal with high sulfur and high degree of deterioration and weak cohesiveness cannot be used in a large proportion due to poor coking performance is solved by fully utilizing the characteristics of low ash, low sulfur and cohesiveness of the waste plastics, a coal blending structure is optimized, the coal blending cost is reduced, and the qualified metallurgical coke is produced.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a coking and coal blending method for preparing metallurgical coke by waste plastics is characterized in that the dosage ratio of high-sulfur and high-quality weak-cohesiveness coking coal is improved by adding part of waste plastics, so as to produce qualified metallurgical coke, wherein the mass percentages of the components of blended coal are as follows: 1/3 coking coal: 6% -18%, fat coal: 11% -27%, coking coal: 24% -40%, lean coking coal: 3-18%, high-sulfur, high-deterioration degree and weak caking coal: 15% -25%, waste plastics: 3 to 25 percent.
The mass ratio of the usage amount of the high-sulfur high-deterioration weak-caking coal to the usage amount of the waste plastics is 0.8-3.5.
The index of the coking coal with high sulfur, high deterioration degree and weak caking property is ash content AdA accounts for 8.5 percent or moredLess than or equal to 12.5 percent and volatile component VdafV with the mass fraction of 9 percent or moredafLess than or equal to 22 percent, sulfur content St,dS is more than or equal to 1.5 percentt,dWhen the content is less than or equal to 2.5 percent, the cohesiveness index meets the requirement that the value G of the cohesiveness index is less than or equal to 20 and less than or equal to 74, the thickness Y of a colloidal layer is less than or equal to 10mm, the Gieseler fluidity F is less than or equal to 150ddpm, and simultaneously the coal rock index meets the requirement that the average maximum reflectivity range of vitrinite groups is distributed between 1.6 and 2.2 percent and the coal rock activity is inertA coking coal having a ratio of 0.8 to 1.5.
The mass percentage of the broken fineness of the waste plastics is less than 5mm and is 100%, wherein the mass percentage of the broken fineness of the waste plastics is less than 2mm and is more than or equal to 70%, so that segregation is prevented after the coal material is blended.
The crushing fineness R of the waste plastic-containing mixed coal is more than or equal to 65% and less than or equal to 79%, the ash content of the mixed coal is 8.7-10.5%, the sulfur content is 0.65-0.89%, the Gibber fluidity is 300-600 ddpm, and the indexes of the mixed coal and rock meet that the maximum reflectivity of the vitrinite average value is 1.25-1.45%, and the coal-rock activity-inertia ratio is 2.4-4.2.
The invention has the beneficial effects that: the invention combines the theory of coal blending coking and co-carbonization, adds part of waste plastics and coking coal with high sulfur, high degree of quality change and weak cohesiveness in a coal blending scheme, solves the problem that the coking coal with high sulfur, high degree of quality change and weak cohesiveness cannot be used in large proportion due to poor coking performance by fully utilizing the characteristics of low ash, low sulfur and cohesiveness of the waste plastics, optimizes a coal blending structure, reduces the coal blending cost, produces qualified metallurgical coke, is beneficial to the control of subsequent production cost, increases market competitiveness, realizes the resource utilization of the waste plastics, effectively relieves the problem of white pollution, increases the urban dependence of enterprises, improves the survival ability of the enterprises, and has obvious environmental protection, cost reduction and efficiency improvement values.
Detailed Description
The coking and coal blending method of the present invention will be described in detail with reference to the following embodiments. The scope of the invention is not limited to the following embodiments, which are set forth for illustrative purposes only and are not intended to limit the invention in any way.
Example 1:
1. according to the quality requirement of coke production, the scheme for preparing the coal is as follows: 1/3 coking coal: 15%, fat coal: 15%, coking coal: 30% of lean coking coal: 5 percent of high-sulfur high-quality weak-caking coking coal, 20 percent of high-sulfur high-quality weak-caking coking coal; waste plastics: 15 percent. The coal is prepared into the blended coal according to the proportion, the crushing fineness R of the blended coal is 72 percent, the ash content is 9.74 percent, the sulfur content is 0.78 percent, the Kirschner fluidity is 486ddpm, the average value of the maximum reflectivity of vitrinite is 1.37 percent, and the coal-rock activity-inertia ratio reaches 3.55.
2. Wherein the total mass ratio of the sulfur high-metamorphic grade weak caking coal and the waste plastics is 35 percent, and the mass ratio of the sulfur high-metamorphic grade weak caking coal to the waste plastics is 4/3.
3. Ash content A of coking coal with high sulfur and high deterioration degree and weak caking propertyd9.4% of volatile component Vdaf18% of sulfur content St,dThe coal-rock index satisfies that the maximum reflectivity range of the vitrinite group is 1.6-2.2%, the average value of the maximum reflectivity of the vitrinite group is 1.78%, and the coal-rock activity-inertness ratio is 1.4.
4. Wherein the crushing fineness of the waste plastics is below 5mm, and the mass percentage ratio of the fineness of less than 2mm is 85%.
5. The coke quality of the coal blending scheme for producing the waste plastics and the standard coal blending scheme is compared as follows:
example 2:
1. according to the quality requirement of coke production, the scheme for preparing the coal is as follows: 1/3 coking coal: 12%, fat coal: 20%, coking coal: 35% of lean coke: 3 percent of high-sulfur high-quality weak-caking coking coal, 18 percent of high-sulfur high-quality weak-caking coking coal; waste plastics: 12 percent. The coal is prepared according to the proportion, the crushing fineness R of the coal is 70.2%, the ash content is 9.65%, the sulfur content is 0.76%, the Gieseler fluidity is 512ddpm, the average value of the maximum reflectivity of vitrinite is 1.35%, and the coal-rock activity-inertia ratio reaches 3.73.
2. Wherein the total mass ratio of the high-sulfur deterioration degree weak caking coal to the waste plastics is 30%, and the mass ratio of the high-sulfur deterioration degree weak caking coal to the waste plastics is 3/2.
3. Ash content A of coking coal with high sulfur and high deterioration degree and weak caking propertyd9.4% of volatile component Vdaf18% of sulfur content St,d1.76 percent, the bond index G value is 60, the thickness Y value of the colloidal layer is 9mm, the Gieseler fluidity F is less than or equal to 135ddpm, and simultaneously the coal rock index meets the requirement that the maximum reflectivity range of the vitrinite group is distributed between 1.6 percent and 2.2 percent, and the vitrinite group has the advantages of high adhesion, high strength, high toughness, high strength, highThe average value of the maximum reflectivity of the mass group is 1.78%, and the coal-rock activity-inertia ratio is 1.4.
4. Wherein the crushing fineness of the waste plastics is below 5mm, and the mass percentage ratio of the fineness of less than 2mm is 80%.
5. The coke quality of the coal blending scheme for producing the waste plastics and the standard coal blending scheme is compared as follows:
example 3:
1. according to the quality requirement of coke production, the scheme for preparing the coal is as follows: 1/3 coking coal: 10%, fat coal: 10%, coking coal: 30% of lean coking coal: 5 percent of high-sulfur high-quality weak-caking coking coal, 25 percent of high-sulfur high-quality weak-caking coking coal; waste plastics: 20 percent. The coal is prepared according to the proportion, the crushing fineness R of the coal is 70.2%, the ash content is 9.65%, the sulfur content is 0.76%, the Gieseler fluidity is 512ddpm, the average value of the maximum reflectivity of vitrinite is 1.35%, and the coal-rock activity-inertia ratio reaches 3.73.
2. Wherein the total mass ratio of the high-sulfur deterioration degree weak caking coal to the waste plastics is 30%, and the mass ratio of the high-sulfur deterioration degree weak caking coal to the waste plastics is 5/4.
3. Wherein the crushing fineness of the waste plastics is below 5mm, and the mass percentage ratio of the fineness of less than 2mm is 74%.
4. Ash content A of coking coal with high sulfur and high deterioration degree and weak caking propertyd9.4% of volatile component Vdaf18% of sulfur content St,dThe coal-rock index satisfies that the maximum reflectivity range of the vitrinite group is 1.6-2.2%, the average value of the maximum reflectivity of the vitrinite group is 1.78%, and the coal-rock activity-inertness ratio is 1.4.
5. The coke quality of the coal blending scheme for producing the waste plastics and the standard coal blending scheme is compared as follows:
Claims (4)
1. a coking and coal blending method for preparing metallurgical coke by waste plastics is characterized in that the dosage ratio of high-sulfur and high-quality weak-caking coking coal is improved by blending part of waste plastics, and the blending coal comprises the following components in percentage by mass: 1/3 coking coal: 6% -18%, fat coal: 11% -27%, coking coal: 24% -40%, lean coking coal: 3-18%, high-sulfur, high-deterioration degree and weak caking coal: 15% -25%, waste plastics: 3% -25%; the index of the coking coal with high sulfur, high deterioration degree and weak caking property is ash content AdA accounts for 8.5 percent or moredLess than or equal to 12.5 percent and volatile component VdafV with the mass fraction of 9 percent or moredafLess than or equal to 22 percent, sulfur content St,dS is more than or equal to 1.5 percentt,dWhen the adhesive content is less than or equal to 2.5 percent, the adhesiveness index satisfies that the adhesive index G value is less than or equal to 20 and less than or equal to 74, the thickness Y of the colloidal layer is less than or equal to 10mm, and the Gieseler fluidityFThe standard value is less than or equal to 150ddpm, and meanwhile, the coal and rock indexes meet the requirement that the average maximum reflectivity of vitrinite is distributed in a range of 1.6-2.2%, and the coal and rock activity-inertia ratio is 0.8-1.5.
2. The coking and coal blending method for preparing metallurgical coke by using waste plastics as claimed in claim 1, wherein the ratio of the amount of the high-sulfur, high-deterioration and weak-caking coal to the amount of the waste plastics is 0.8-3.5.
3. The coking and coal blending method for preparing metallurgical coke by using waste plastics as claimed in claim 1, wherein the mass percentage of the broken fineness of the waste plastics < 5mm is 100%, and the mass percentage of the broken fineness < 2mm is more than or equal to 70%, so as to prevent segregation after blending coal.
4. The coking and coal blending method for preparing metallurgical coke by using waste plastics as claimed in claim 1, which is characterized in that the crushing fineness R of the waste plastic-containing blended coal is more than or equal to 65% and less than or equal to 79%, the ash content of the blended coal is 8.7% -10.5%, the sulfur content is 0.65% -0.89%, the Gieseler fluidity is 300 ddpm-600 ddpm, and the indexes of the blended coal and rock meet that the maximum reflectivity of vitrinite is 1.25% -1.45% and the coal-rock activity-inertia ratio is 2.4-4.2.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4463203A (en) * | 1981-11-13 | 1984-07-31 | Gi Kim D | Process for the preparation of fuel oil, fuel gas and pyrolysis coke by pyrolysis |
| CN1502675A (en) * | 2002-11-20 | 2004-06-09 | 首钢总公司 | Method and system for improving metallurgical coke strength by utilizing waste plastics |
| JP2008069258A (en) * | 2006-09-14 | 2008-03-27 | Jfe Steel Kk | Manufacturing method of high-strength coke |
| EP2103667A1 (en) * | 2007-04-10 | 2009-09-23 | Boris Musokhranov | Mixture of minerals and fluxes for obtaining metallurgical coke (variants) |
| CN105131995A (en) * | 2015-09-02 | 2015-12-09 | 武汉钢铁(集团)公司 | Coal blending method for controlling coke abrasive resistance |
| CN107446605A (en) * | 2017-08-21 | 2017-12-08 | 宣化钢铁集团有限责任公司 | With addition of the coking mixed coal and coke making and coal blending method of reworked material |
| CN109135765A (en) * | 2018-08-17 | 2019-01-04 | 沂州科技有限公司 | coke and preparation method thereof |
| CN110330993A (en) * | 2019-07-04 | 2019-10-15 | 太原理工大学 | A kind of briquetted coal blending coking method based on difunctional binder |
| CN110628446A (en) * | 2018-06-25 | 2019-12-31 | 上海梅山钢铁股份有限公司 | Coking method for increasing coke granularity |
| CN110819364A (en) * | 2019-10-30 | 2020-02-21 | 鞍钢股份有限公司 | Method for preparing metallurgical coke |
-
2020
- 2020-05-29 CN CN202010475972.1A patent/CN111662735B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4463203A (en) * | 1981-11-13 | 1984-07-31 | Gi Kim D | Process for the preparation of fuel oil, fuel gas and pyrolysis coke by pyrolysis |
| CN1502675A (en) * | 2002-11-20 | 2004-06-09 | 首钢总公司 | Method and system for improving metallurgical coke strength by utilizing waste plastics |
| JP2008069258A (en) * | 2006-09-14 | 2008-03-27 | Jfe Steel Kk | Manufacturing method of high-strength coke |
| EP2103667A1 (en) * | 2007-04-10 | 2009-09-23 | Boris Musokhranov | Mixture of minerals and fluxes for obtaining metallurgical coke (variants) |
| CN105131995A (en) * | 2015-09-02 | 2015-12-09 | 武汉钢铁(集团)公司 | Coal blending method for controlling coke abrasive resistance |
| CN107446605A (en) * | 2017-08-21 | 2017-12-08 | 宣化钢铁集团有限责任公司 | With addition of the coking mixed coal and coke making and coal blending method of reworked material |
| CN110628446A (en) * | 2018-06-25 | 2019-12-31 | 上海梅山钢铁股份有限公司 | Coking method for increasing coke granularity |
| CN109135765A (en) * | 2018-08-17 | 2019-01-04 | 沂州科技有限公司 | coke and preparation method thereof |
| CN110330993A (en) * | 2019-07-04 | 2019-10-15 | 太原理工大学 | A kind of briquetted coal blending coking method based on difunctional binder |
| CN110819364A (en) * | 2019-10-30 | 2020-02-21 | 鞍钢股份有限公司 | Method for preparing metallurgical coke |
Non-Patent Citations (2)
| Title |
|---|
| 加废塑料配煤炼焦的产品产率和性能研究;徐君;《冶金能源》;20041125(第6期);第13-15页 * |
| 废塑料配煤炼焦机理研究及进展;刘彩红;《环境科技》;20090415(第2期);第70-73页 * |
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