CN111686912A - Semi coke screening, crushing and grading process and device - Google Patents
Semi coke screening, crushing and grading process and device Download PDFInfo
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- CN111686912A CN111686912A CN202010605495.6A CN202010605495A CN111686912A CN 111686912 A CN111686912 A CN 111686912A CN 202010605495 A CN202010605495 A CN 202010605495A CN 111686912 A CN111686912 A CN 111686912A
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- 238000012216 screening Methods 0.000 title claims abstract description 71
- 239000000571 coke Substances 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 134
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000003860 storage Methods 0.000 claims abstract description 18
- 235000019580 granularity Nutrition 0.000 claims abstract description 16
- 239000002245 particle Substances 0.000 claims abstract description 13
- 238000009826 distribution Methods 0.000 claims abstract description 12
- 238000003763 carbonization Methods 0.000 claims abstract description 5
- 230000003139 buffering effect Effects 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 9
- 239000006260 foam Substances 0.000 claims description 9
- 239000003610 charcoal Substances 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 6
- 239000010410 layer Substances 0.000 claims description 3
- 239000002356 single layer Substances 0.000 claims description 3
- 238000013329 compounding Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000003245 coal Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 239000004484 Briquette Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000003077 lignite Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
- B02C4/08—Crushing or disintegrating by roller mills with two or more rollers with co-operating corrugated or toothed crushing-rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B2201/00—Details applicable to machines for screening using sieves or gratings
- B07B2201/04—Multiple deck screening devices comprising one or more superimposed screens
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention discloses a semi coke screening, crushing and grading process and a device, belonging to the technical field of semi coke production, and the process mainly comprises the following steps: (1) semi coke from a vertical carbonization furnace is subjected to primary screening to obtain semi coke with three granularities of large material, medium material and mixed material; (2) conveying the medium materials to a medium material storage yard; (3) two paths are provided after the large material is sent into the material distributor for distribution, one path is sent to a large material storage yard, and the other path is crushed and then merged into the step (2) and then sent to a middle material storage yard; (4) the mixed material is screened for the second time to obtain semi-coke with two granularities of small material and carbon foam, the small material is sent to a small material storage yard, and the carbon foam is sent to a carbon foam storage yard; the semi-coke screening method can obtain products with four particle size specifications through primary screening, crushing and secondary screening, improves the specification diversity of semi-coke products, can meet market demands in multiple directions, and meanwhile, the products cannot be crushed too much, so that the screening efficiency is high, the product quality is good, and the capacity is high.
Description
Technical Field
A semi-coke screening, crushing and grading process and a device belong to the technical field of semi-coke production, and particularly relate to screening and crushing of semi-coke products.
Background
Semi coke is a solid carbonaceous product with low volatile content, which is obtained by pyrolyzing lignite and low-rank coal such as long-flame coal, weakly caking coal and non-caking coal in an internal heating type vertical carbonization furnace under medium and low temperature conditions to separate out coal tar and coal gas. The semi coke is used as a high-quality clean fuel, can replace coal or coke by the characteristics of low sulfur, low ash, high calorific value and the like, and is widely applied to the fields of chemical industry, metallurgy, electric power, heat supply, civil briquette and the like; in addition, due to the porous structure of the semi-coke, the semi-coke is gradually researched and applied in the fields of sewage treatment, electrode material preparation and the like. In recent years, the semi-coke industry has become a special industry for producing low-rank coal under the support of various national and local policies, and is mainly distributed in regions such as elm, Xinjiang, Ordos and Ningxia.
The semi coke industry development earlier stage is mostly production on a small scale, and the single-furnace productivity is only 3 ~ 5 ten thousand tons, and the technology is outdated, equipment is crude in addition, and semi coke sieve fortune technology is simplified, and the semi coke of upright stove output often directly is sent to the storage yard and deposits or only simply sieves out two kinds of specifications, and not only semi coke product is single in grades, owing to the screening inefficiency, the difficult control of the excessive crushing volume in the different size grades leads to the product to lack market competition. With the further expansion of the market demand of semi-coke, semi-coke products generally need to be divided into four particle sizes of large, medium and small lump materials and carbon powder, and the market demands of products with different particle sizes are different, wherein the demand of the medium lump material is the largest; in order to solve the problems, the invention provides a semi coke screening, crushing and grading process and a semi coke screening, crushing and grading device, so that products with various specifications can be obtained, and the market demand can be met in multiple directions.
Disclosure of Invention
The invention aims to: the utility model provides a blue charcoal screening crushing classification technology and device can obtain the product of four kinds of granularity specifications through once screening, breakage and secondary screening, improves the specification diversity of blue charcoal product, can diversely satisfy market demand, and simultaneously, the product can not crossed the smashing, and screening efficiency is high, and product quality is good, and the productivity is big.
The technical scheme adopted by the invention is as follows:
in order to realize the aim, the invention provides a semi coke screening, crushing and grading process, which comprises the following steps:
(1) semi coke from a vertical carbonization furnace is subjected to primary screening to obtain semi coke with three granularities of large material, medium material and mixed material;
(2) conveying the medium materials to a medium material storage yard;
(3) two paths are provided after the large material is sent into the material distributor for distribution, one path is sent to a large material storage yard, and the other path is crushed and then merged into the step (2) and then sent to a middle material storage yard;
(4) and (3) performing secondary screening on the mixed material to obtain semi-coke with two particle sizes of small material and carbon foam, conveying the small material to a small material storage yard, and conveying the carbon foam to a carbon foam storage yard.
Preferably, in the step (1), the granularity of the large material is larger than 36mm, the granularity of the medium material is 15-36 mm, and the granularity of the mixed material is smaller than 15 mm.
Preferably, the large blocks in the step (3) are crushed to 15-36 mm.
Preferably, the granularity of the small materials in the step (4) is 6-15 mm, and the granularity of the carbon foam is less than 6 mm.
The invention also provides a semi coke screening, crushing and grading device, which comprises: the device comprises a first belt conveyor, a primary screening device, a second belt conveyor, a material distribution crushing device, a third belt conveyor and a secondary screening device;
the first belt conveyor is connected with a primary screening device, and the primary screening device is provided with a large material discharge port, a medium material discharge port and a mixed material discharge port;
the large material discharge port is connected with a material distribution and crushing device through a belt conveyor II, the material distribution and crushing device comprises an electro-hydraulic three-way material distributor and a crusher, one outlet of the electro-hydraulic three-way material distributor is connected with the large material belt conveyor, the other outlet of the electro-hydraulic three-way material distributor is connected with the crusher, and the crusher is connected with a medium material belt conveyor;
the medium material discharge port is connected with the medium material belt conveyor, the material mixing discharge port is connected with the secondary screening device through the belt conveyor, the secondary screening device is provided with a small material discharge port and a carbon foam discharge port, the small material discharge port is connected with the small material belt conveyor, and the carbon foam discharge port is connected with the foam belt conveyor.
Preferably, the primary screening device comprises a primary screen front buffer bin, an electro-hydraulic gate valve I, a vibrating feeder I and a primary vibrating screen, a feeding port of the primary screen front buffer bin is connected with the belt conveyor, a discharging port of the primary screen front buffer bin is provided with the electro-hydraulic gate valve I, and a discharging port of the primary screen front buffer bin is sequentially connected with the vibrating feeder I and the primary vibrating screen.
Preferably, the primary vibrating screen is a double-layer screen, and the semi coke with the granularity larger than 36mm (large material), 15-36 mm (medium material) and smaller than 15mm (mixed material) is separated from the material from the first vibrating feeder after being screened by the primary vibrating screen.
Preferably, the secondary screening device comprises a secondary screen front buffer bin, an electro-hydraulic gate valve II, a vibrating feeder II and a secondary vibrating screen, a feeding port of the secondary screen front buffer bin is connected with a belt conveyor III, a discharge port of the secondary screen front buffer bin is provided with the electro-hydraulic gate valve II, and a discharge port of the secondary screen front buffer bin is sequentially connected with the vibrating feeder II and the secondary vibrating screen.
Preferably, the secondary vibrating screen is a single-layer screen, and semi-coke products with the particle sizes of 6-15 mm (small materials) and less than 6mm (carbon foam) are separated after screening.
Preferably, the crusher is a double-geared roller crusher.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the semi-coke screening method, through primary screening, crushing and secondary screening, the semi-coke products can be separated into four particle size specifications of more than 36mm (large material), 15-36 mm (medium material), 6-15 mm (small material) and less than 6mm (carbon foam), meanwhile, semi-coke grading is not limited to 36mm, 15mm and 6mm grading, the sizes of the sieve pores of the primary vibrating screen and the secondary vibrating screen can be adjusted according to requirements, and different particle size products are screened, so that the semi-coke products with various specifications can be obtained, and the market requirements can be met in multiple directions.
2. According to the invention, large and medium materials with the particle size of more than 36mm and 15-36 mm are screened out through one-time screening, so that multiple crushing can be avoided, the finished product rate of the lump coke is improved, and the product quality is improved.
3. According to the invention, the large coke with the thickness of more than 36mm obtained by one-time screening can be directly stored in a large material yard, and can also be crushed into a medium material with the thickness of 15-36 mm, and meanwhile, the selected crusher is a double-geared roller crusher, so that over-crushing can be avoided, and the maximum capacity of the medium material can be ensured.
4. The semi-coke mixing method obtains the mixed material with the thickness of less than 15mm through primary screening, then separates the small material with the thickness of more than 6mm and the carbon foam with the thickness of less than 6mm through secondary screening, and can further separate the small mixed material through secondary screening, thereby increasing the specification of semi-coke products and improving the market competitiveness of the products.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a view showing the structure of the apparatus of the present invention.
Labeled as: 1-first belt conveyor, 2-first screening device, 201-first screen front buffer bin, 202-first electro-hydraulic gate valve, 203-first vibrating feeder, 204-first vibrating screen, 3-second belt conveyor, 4-material separating and crushing device, 401-electro-hydraulic three-way distributor, 402-crusher, 5-large belt conveyor, 6-medium belt conveyor, 7-third belt conveyor, 8-second screening device, 801-second screen front buffer bin, 802-second electro-hydraulic gate valve, 803-second vibrating feeder, 804-second vibrating screen, 9-small belt conveyor and 10-foam belt conveyor.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1, the present embodiment provides a semi coke screening, crushing and classifying device, which includes: the device comprises a first belt conveyor 1, a primary screening device 2, a second belt conveyor 3, a material distribution and crushing device 4, a third belt conveyor 7 and a secondary screening device 8;
the belt conveyor I1 is connected with a primary screening device 2, and the primary screening device 2 is provided with a large material discharge hole, a medium material discharge hole and a mixed material discharge hole;
the large material discharge port is connected with a material distribution and crushing device 4 through a belt conveyor II 3, the material distribution and crushing device 4 comprises an electro-hydraulic three-way distributor 401 and a crusher 402, one outlet of the electro-hydraulic three-way distributor 401 is connected with a large material belt conveyor 5, the other outlet of the electro-hydraulic three-way distributor 401 is connected with the crusher 402, and the crusher 402 is connected with a medium material belt conveyor 6; the crusher 402 is a double-geared roller crusher;
well material discharge gate is connected well material belt conveyor 6, the compounding discharge gate passes through three 7 of belt conveyor and connects secondary screening plant 8, secondary screening plant 8 has small powder discharge gate and charcoal foam discharge gate, small powder belt conveyor 9 is connected to the small powder discharge gate, foam belt conveyor 10 is connected to the charcoal foam discharge gate.
Example 2
This embodiment is preferred on embodiment 1's basis, primary screening device 2 includes a screen preceding surge bin 201, an electro-hydraulic gate valve 202, a vibrating feeder 203 and a vibrating screen 204, the pan feeding mouth of a screen preceding surge bin 201 is connected with belt conveyor 1, a screen preceding surge bin 201's discharge gate is equipped with an electro-hydraulic gate valve 202, a screen preceding surge bin 201 discharge gate connects gradually vibrating feeder 203 and a vibrating screen 204. The primary vibrating screen 204 is a double-layer screen, and the materials from the first vibrating feeder 203 are screened by the primary vibrating screen 204 to separate semi coke with three particle sizes of more than 36mm (large material), 15-36 mm (medium material) and less than 15mm (mixed material).
Example 3
The embodiment is preferable on the basis of embodiment 1, the secondary screening device 8 comprises a secondary screen front buffering bin 801, an electro-hydraulic gate valve II 802, a vibrating feeder II 803 and a secondary vibrating screen 804, a feeding port of the secondary screen front buffering bin 801 is connected with a belt conveyor III 7, an electro-hydraulic gate valve II 802 is arranged at a discharge port of the secondary screen front buffering bin 801, and the discharge port of the secondary screen front buffering bin 801 is sequentially connected with the vibrating feeder II 803 and the secondary vibrating screen 804. The secondary vibrating screen 804 is a single-layer screen, and semi-coke products with two particle sizes of 6-15 mm (small materials) and less than 6mm (carbon foam) are separated after screening.
Example 4
The embodiment provides a semi coke screening, crushing and grading process, which comprises the following steps:
(1) the semi-coke from the vertical carbonization furnace is conveyed to a front buffer bin of a primary sieve by a belt conveyor, is discharged by an electro-hydraulic gate valve after being buffered, and is fed to a primary vibrating sieve by a vibrating feeder, and the primary vibrating sieve is used for respectively sieving semi-coke with three granularities of large material, medium material and mixed material;
(2) the medium materials are sent to a medium material storage yard through a medium material belt conveyor;
(3) the large material is sent to the electro-hydraulic three-way material distributor through the belt conveyor II, two paths of discharging materials are formed after the materials are distributed by the electro-hydraulic three-way material distributor, one path of discharging materials is sent to a large material storage yard through the large material belt conveyor, and the other path of discharging materials is merged into the middle material belt conveyor;
(4) the mixed material is conveyed to a front buffering bin of a secondary screen through a third belt conveyor, is discharged through a second electro-hydraulic gate valve after being buffered, is fed to a secondary vibrating screen through a second vibrating feeder, the secondary vibrating screen respectively screens out semi-coke with two granularities of small material and carbon foam, the small material is conveyed to a small material piling site through a small material belt conveyor, and the carbon foam is conveyed to a carbon foam piling site through a foam belt conveyor.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; these modifications and substitutions do not cause the essence of the corresponding technical solution to depart from the scope of the technical solution of the embodiments of the present invention, and are intended to be covered by the claims and the specification of the present invention.
Claims (10)
1. A semi coke screening, crushing and grading process is characterized by comprising the following steps:
(1) semi coke from a vertical carbonization furnace is subjected to primary screening to obtain semi coke with three granularities of large material, medium material and mixed material;
(2) conveying the medium materials to a medium material storage yard;
(3) two paths are provided after the large material is sent into the material distributor for distribution, one path is sent to a large material storage yard, and the other path is crushed and then merged into the step (2) and then sent to a middle material storage yard;
(4) and (3) performing secondary screening on the mixed material to obtain semi-coke with two particle sizes of small material and carbon foam, conveying the small material to a small material storage yard, and conveying the carbon foam to a carbon foam storage yard.
2. The semi coke screening, crushing and grading process according to claim 1, wherein in the step (1), the granularity of a large material is larger than 36mm, the granularity of a medium material is 15-36 mm, and the granularity of a mixed material is smaller than 15 mm.
3. The semi coke screening, crushing and grading process according to claim 1, wherein the large blocks in the step (3) are crushed to 15-36 mm.
4. The semi coke screening, crushing and grading process according to claim 1, wherein the particle size of the small material in the step (4) is 6-15 mm, and the particle size of the carbon foam is less than 6 mm.
5. The utility model provides a blue charcoal screening crushing grading plant which characterized in that includes: the device comprises a first belt conveyor (1), a primary screening device (2), a second belt conveyor (3), a material distribution and crushing device (4), a third belt conveyor (7) and a secondary screening device (8);
the belt conveyor I (1) is connected with a primary screening device (2), and the primary screening device (2) is provided with a large material discharge port, a medium material discharge port and a mixed material discharge port;
the large material discharge port is connected with a material distribution and crushing device (4) through a belt conveyor II (3), the material distribution and crushing device (4) comprises an electro-hydraulic three-way material distributor (401) and a crusher (402), one outlet of the electro-hydraulic three-way material distributor (401) is connected with a large material belt conveyor (5), the other outlet of the electro-hydraulic three-way material distributor (401) is connected with the crusher (402), and the crusher (402) is connected with a medium material belt conveyor (6);
well material belt conveyor (6) are connected to the well material discharge gate, the compounding discharge gate passes through three (7) of belt conveyor and connects secondary screening plant (8), secondary screening plant (8) have small powder discharge gate and charcoal foam discharge gate, small powder belt conveyor (9) are connected to the small powder discharge gate, foam belt conveyor (10) are connected to the charcoal foam discharge gate.
6. The semi coke screening, crushing and grading device according to claim 5, characterized in that the primary screening device (2) comprises a primary screen front buffering bin (201), an electro-hydraulic gate valve I (202), a vibrating feeder I (203) and a primary vibrating screen (204), a feeding port of the primary screen front buffering bin (201) is connected with a belt conveyor I (1), a discharging port of the primary screen front buffering bin (201) is provided with the electro-hydraulic gate valve I (202), and a discharging port of the primary screen front buffering bin (201) is sequentially connected with the vibrating feeder I (203) and the primary vibrating screen (204).
7. A semi coke screening, crushing and grading device according to claim 6, characterized in that the primary vibrating screen (204) is a double-layer screen.
8. The semi coke screening, crushing and grading device according to claim 5, characterized in that the secondary screening device (8) comprises a secondary screen front buffering bin (801), an electro-hydraulic gate valve II (802), a vibrating feeder II (803) and a secondary vibrating screen (804), a feeding port of the secondary screen front buffering bin (801) is connected with a belt conveyor III (7), a discharging port of the secondary screen front buffering bin (801) is provided with the electro-hydraulic gate valve II (802), and a discharging port of the secondary screen front buffering bin (801) is sequentially connected with the vibrating feeder II (803) and the secondary vibrating screen (804).
9. A semi coke screening, crushing and grading device according to claim 8, characterized in that the secondary vibrating screen (804) is a single-layer screen.
10. A semi coke screening, crushing and grading device according to claim 5, characterized in that the crusher (402) is a double-geared roller crusher.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010605495.6A CN111686912A (en) | 2020-06-29 | 2020-06-29 | Semi coke screening, crushing and grading process and device |
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| CN202010605495.6A CN111686912A (en) | 2020-06-29 | 2020-06-29 | Semi coke screening, crushing and grading process and device |
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