CN1664067A - Process for preparing foundry coke - Google Patents
Process for preparing foundry coke Download PDFInfo
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- CN1664067A CN1664067A CN 200510010645 CN200510010645A CN1664067A CN 1664067 A CN1664067 A CN 1664067A CN 200510010645 CN200510010645 CN 200510010645 CN 200510010645 A CN200510010645 A CN 200510010645A CN 1664067 A CN1664067 A CN 1664067A
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- Prior art keywords
- coal
- millimeter
- coke
- tar
- millimeters
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- 239000000571 coke Substances 0.000 title claims abstract description 43
- 238000004519 manufacturing process Methods 0.000 title description 2
- 239000003245 coal Substances 0.000 claims abstract description 59
- 238000000034 method Methods 0.000 claims abstract description 23
- 239000011280 coal tar Substances 0.000 claims abstract description 22
- 238000003756 stirring Methods 0.000 claims abstract description 4
- 239000011294 coal tar pitch Substances 0.000 claims description 20
- 239000002994 raw material Substances 0.000 claims description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 238000002360 preparation method Methods 0.000 claims description 7
- 239000011230 binding agent Substances 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 238000012856 packing Methods 0.000 claims description 4
- 230000003064 anti-oxidating effect Effects 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000005253 cladding Methods 0.000 claims 1
- 238000002156 mixing Methods 0.000 abstract description 5
- 238000004898 kneading Methods 0.000 abstract description 3
- 239000011300 coal pitch Substances 0.000 abstract 2
- 238000001816 cooling Methods 0.000 abstract 1
- 238000009413 insulation Methods 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 7
- 239000005864 Sulphur Substances 0.000 description 7
- 238000004939 coking Methods 0.000 description 6
- 238000003763 carbonization Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 241000226585 Antennaria plantaginifolia Species 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 235000019580 granularity Nutrition 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Coke Industry (AREA)
Abstract
The invention discloses a method for preparing foundry coke, employing blind coal as stock, disintegrating it separately into three grade size: 1~3mm, 0.18~1mm, <0.18mm, for reservation. Adding coal pitch and coal tar as adhensive, filling the mixing and kneading pot with the said three blind coal, stirring at the temperature 110~130 DEG C for 10 minutes, adding the fused coal pitch and coal tar into the mixing and kneading pot, stirring for 10 minutes. Employing pair roller forming or press forming to the mixed and kneaded sample for forming, then setting for 24 hours, for reservation. Feeding the retort with formed sample for warming-up and charring, covering the surface of the sample with pulverized coke for air insulation and avoiding oxidization; cooling in natural way after charring to normal temperature, removing the pulverized coke, fetching it out and getting the needed product.
Description
Technical field
The present invention relates to the preparation method of coke, more particularly, the present invention relates to a kind of preparation method of foundry coke.
Background technology
In the prior art, when adopting hard coal to produce coke, when especially producing foundry coke, because hard coal cohesiveness is relatively poor, generally all in raw material, add part coking coal or rich coal, the cohesiveness of utilizing coking coal and rich coal in carbonization process with the hard coal molding bonded.If the ash content of raw coal is higher, for the ash content that reduces in the coke also will add the part refinery coke.The coking equipment that is adopted has upright case stove, wedged bottom stove, tampering coking oven etc., and complex process, facility investment are big.The volatile combustion that produces in the carbonization process is insufficient, fuel consumption height, the volatile matter serious environment pollution that overflows.Moreover the intensity of product, ash content, sulphur content, void content and lumpiness are all not ideal enough, are difficult to reach casting.The quality standard of coke.This is a technical barrier that presses for solution.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of preparation method of foundry coke is provided.This method is a raw material with hard coal list coal, need not to add other coal, the technology advantages of simple, and coke product is superior in quality.
Purpose of the present invention is achieved by following technical proposals.
Except as otherwise noted, the percentage ratio that is adopted among the present invention is weight percentage.
The invention provides a kind of preparation method of foundry coke, this method adopts the step of following order:
(1) with the hard coal be raw material, it is broken into 1 millimeter～3 millimeters, 0.18 millimeter～1 millimeter respectively,＜0.18 millimeter three grade is standby;
(2) interpolation coal-tar pitch, coal tar are binding agent, and by weight percentage, the proportioning of each component is: 1～3 millimeter hard coal 20%～35%, 0.18～1 millimeter hard coal 10%～25%,＜0.18 millimeter hard coal 25%～40%, coal-tar pitch 8%～10%, coal tar 4%～6%;
(3) mix and to pinch, will above-mentioned three kinds of hard coals add earlier to mix to pinch in the pot and stirred 10 minutes under 110 ℃～130 ℃ temperature condition, the coal-tar pitch after the fusing of will heating again, coal tar add to mix pinches pot stirring 10 minutes;
(4) roller press briquetting or impact briquetting are adopted in moulding, and forming pressure is controlled at 10MPa～40MPa; According to foundry coke standard GB 8729-88 requirement, the coke lumpiness selects respectively＞80 millimeters, 80 millimeters～60 millimeters,＞60 millimeters, perhaps change shape, size according to customer requirements, the sample that roller press briquetting comes out is pincushion, sphere, and the sample that impact briquetting is come out is cylindrical, square; To mix pinch the back sample carry out leaving standstill 24 hours after pair roller or the impact briquetting, standby;
(5) charing, with the charring furnace charing that heats up of packing into of sample after the moulding, sample top covers the coke powder of 450 millimeters～500 mm thick with secluding air, anti-oxidation; For preventing that the too fast product that makes of heat-up rate cracks in carbonization process, answer the heat-up rate of strict control carbonization process; The heat-up rate of charing is as shown in table 1:
Table 1.
| Temperature section | Heat-up rate, ℃/hour |
| ??20℃-250℃ | ????50≤ |
| ??250-600℃ | ????10≤ |
| ??600-800℃ | ????12≤ |
| ??800-1050℃ | ????15≤ |
Naturally be cooled to room temperature after charing finishes, remove the upper strata and cover coke powder, take out, promptly get required foundry coke product.
The every index test of product: require product is tested according to foundry coke standard GB 8729-88, test result is as shown in table 2:
Test result shows that the foundry coke that the present invention produces is superior in quality, has reached the superfine foundry coke standard of GB.
Table 2.
| Index | National standard | The result |
| Lumpiness, mm | ????＞60 | ????＞80 |
| Moisture (M t)，％ | ????≤5.0 | ????1.01 |
| Ash content (A d)，％ | ????≤8.00 | ????4.92 |
| Volatile matter (V daf)，％ | ????≤1.50 | ????1.04 |
| Sulphur content, (S t，d)，％ | ????≤0.60 | ????0.58 |
| Barrate strength (M 40)，％ | ????≥85.0 | ????88.7 |
| Dropping strength (SI 4 50)，％ | ????≥92.0 | ????93 |
| Apparent porosity (P s)，％ | ????≤40 | ????24 |
| Broken burnt rate (＜40mm), % | ????≤4.0 | ????3.2 |
Wherein, charring furnace adopts the ring type charring furnace.
Compared with prior art, the present invention has following beneficial effect:
(1) is raw material only, need not to add other coal, but be equipped with coal-tar pitch, coal tar, enlarged the coking coal coal, saved rich coal, coking coal resource, the binding agent wide material sources as binding agent with the hard coal;
(2) technology is reasonable, the product cold charge is cold to be gone out, charing equipment adopts the ring type charring furnace, it is oxidized to prevent that with the coke powder covering coke is exposed in the air, the volatile matter that is produced in carbonization process enters quirk and fully burns, and has both replenished a part of heat and has also solved the environmental pollution that the volatile matter generation causes simultaneously;
(3) foundry coke of Zhi Zaoing is superior in quality, has the intensity height, ash content is low, sulphur content is low, void content is low, the advantage of lumpiness homogeneous, reaches the requirement of the superfine foundry coke of GB GB8729-88.
(4) the superfine foundry coke produced of the present invention, production cost be less than 800 yuan/ton, and the sale price of market is greater than 2000 yuan/ton, the return on investment (ROI) height.
Embodiment
The several embodiment of various details, but content of the present invention is not limited to this fully.
Embodiment 1
The anthracitic composition of raw material, as shown in table 3:
Table 3.
| Test index | Data |
| Moisture (M t)，％ | ????1.08 |
| Ash content (A d)，％ | ????4.00 |
| Volatile matter (V daf)，％ | ????4.46 |
| Sulphur content (S t，d)，％ | ????0.69 |
It is broken into 1～3 millimeter, 0.18～1 millimeter respectively, and＜0.18 millimeter three grade is standby; As binding agent, material proportion is as shown in table 4 with the coal-tar pitch of Kunming Iron and Steel Works and coal tar:
Table 4.
| Title | Add-on, g | Allocation ratio |
| The 3-1 hard coal | ??1750 | ??35％ |
| 0.18-1 hard coal | ??750 | ??15％ |
| ＜0.18 hard coal | ??1800 | ??36％ |
| Coal-tar pitch | ??450 | ??9％ |
| Coal tar | ??250 | ??5％ |
Kneader (the aboveground machine works of kneading in Rugao City, Jiangsu, SH-10 type) is warming up to 120 ℃, the hard coal of three kinds of granularities is added in the kneader stirred 10 minutes.With coal-tar pitch, coal tar fusing, pour kneader after the mixing into respectively, under 120 ℃ of conditions, stirred 10 minutes.With mixing the material the pinch mould of packing into, adopt the impact briquetting mode, be the cylindrical sample of 80 * 100 millimeters of φ at the forming under the pressure of 40MPa.Said sample is packed in the charring furnace, cover with coke powder, control temperature-rise period, the record that heats up see Table 5. and heat up and finish powered-down, freely are cooled to room temperature, remove the upper strata and cover coke powder, take out sample, are required foundry coke.The product test result is as shown in table 6:
Table 5.
| Temperature section | Heating-up time, hour |
| ??20℃-250℃ | ????5 |
| ??250℃-600℃ | ????35 |
| ??600℃-800℃ | ????17 |
| ??800℃-1050℃ | ????17 |
Table 6.
| Index | The result |
| Lumpiness, mm | ????φ74×94 |
| Moisture (M t)，％ | ????1.46 |
| Ash content (A d)，％ | ????4.77 |
| Volatile matter (V daf)，％ | ????1.22 |
| Sulphur content (S t，d)，％ | ????0.59 |
| Barrate strength (M 40)，％ | ????88.6 |
| Dropping strength (SI 4 50)，％ | ????92.8 |
| Apparent porosity (P s)，％ | ????27 |
| Broken burnt rate (＜40mm), % | ????3.1 |
Embodiment 2
Repeat embodiment 1, following difference is arranged: determination of raw material the results are shown in Table 7. material proportions and sees Table 8.
Table 7.
| Test index | Data |
| Moisture (M t)，％ | ????1.08 |
| Ash content (A d)，％ | ????4.00 |
| Volatile matter (V daf)，％ | ????4.46 |
| Sulphur content (S t，d)，％ | ????0.69 |
Table 8.
| Title | Add-on, kg | Allocation ratio |
| The 3-1 hard coal | ??98 | ??35％ |
| 0.18-1 hard coal | ??70 | ??25％ |
| ＜0.18 hard coal | ??72.8 | ??26％ |
| Coal-tar pitch | ??25.2 | ??9％ |
| Coal tar | ??14 | ??5％ |
Kneader is warming up to 120 ℃, the hard coal of three kinds of granularities is added in the kneader stirred 10 minutes.With coal-tar pitch, coal tar fusing, pour kneader after the mixing into respectively, under 120 ℃ of conditions, stirred 10 minutes.With the above-mentioned material the pinch mould of packing into that mixes, adopt the roller press briquetting mode, be the pincushion sample of φ 80 * 65 at the forming under the pressure of 20MPa.Said sample is packed in the ring type charring furnace, and top covers with the coke powder of 50 mm thick, the control temperature-rise period, and the record that heats up sees Table the test of 9. quality producies and sees Table 10.
Table 9.
| Temperature section | Heating-up time, hour |
| ??20℃-250℃ | ????20 |
| ??250℃-600℃ | ????40 |
| ??600℃-800℃ | ????40 |
| ??800℃-1050℃ | ????40 |
Table 10.
| Lumpiness, mm | ????φ73×60 |
| Moisture (M t)，％ | ????0.25 |
| Ash content (A d)，％ | ????4.61 |
| Volatile matter (V daf)，％ | ????0.94 |
| Sulphur content (S t，d)，％ | ????0.60 |
| Barrate strength (M 40)，％ | ????89.2 |
| Dropping strength (SI 4 50)，％ | ????93 |
| Apparent porosity (P s)，％ | ????24 |
| Broken burnt rate (＜40mm), % | ????3 |
Embodiment 3
Except proportioning raw materials the hard coal 40% of 24%,＜0.18 millimeter in hard coal of 1～3 millimeter 20%, 0.18～1 millimeter in hard coal, coal-tar pitch 10%, beyond the coal tar 6%, other process is identical with embodiment 1.Quality product reaches the requirement of the superfine foundry coke of GB.
Embodiment 4
Except proportioning raw materials the hard coal 25% of 24%,＜0.18 millimeter in hard coal of 1～3 millimeter 35%, 0.18～1 millimeter in hard coal, coal-tar pitch 10%, beyond the coal tar 6%, other process is identical with embodiment 1.Quality product reaches the requirement of the superfine foundry coke of GB.
Embodiment 5
Except proportioning raw materials the hard coal 40% of 16%,＜0.18 millimeter in hard coal of 1～3 millimeter 28%, 0.18～1 millimeter in hard coal, coal-tar pitch 10%, beyond the coal tar 6%, other process is identical with embodiment 1.Quality product reaches the requirement of the superfine foundry coke of GB.
Embodiment 6
Except proportioning raw materials the hard coal 40% of 10%,＜0.18 millimeter in hard coal of 1～3 millimeter 34%, 0.18～1 millimeter in hard coal, coal-tar pitch 10%, beyond the coal tar 6%, other process is identical with embodiment 1.Quality product reaches the requirement of the superfine foundry coke of GB.
Embodiment 7
Except proportioning raw materials the hard coal 33% of 25%,＜0.18 millimeter in hard coal of 1～3 millimeter 26%, 0.18～1 millimeter in hard coal, coal-tar pitch 10%, beyond the coal tar 6%, other process is identical with embodiment 1.Quality product reaches the requirement of the superfine foundry coke of GB.
Embodiment 8
Except proportioning raw materials the hard coal 28% of 25%,＜0.18 millimeter in hard coal of 1～3 millimeter 35%, 0.18～1 millimeter in hard coal, coal-tar pitch 8%, beyond the coal tar 4%, other process is identical with embodiment 1.Quality product reaches the requirement of the superfine foundry coke of GB.
Embodiment 9
Except proportioning raw materials the hard coal 30% of 24%,＜0.18 millimeter in hard coal of 1～3 millimeter 32%, 0.18～1 millimeter in hard coal, coal-tar pitch 8%, beyond the coal tar 6%, other process is identical with embodiment 1.Quality product reaches the requirement of the superfine foundry coke of GB.
Embodiment 10
Except proportioning raw materials the hard coal 30% of 24%,＜0.18 millimeter in hard coal of 1～3 millimeter 32%, 0.18～1 millimeter in hard coal, coal-tar pitch 10%, beyond the coal tar 4%, other process is identical with embodiment 1.Quality product reaches the requirement of the superfine foundry coke of GB.
Embodiment 11
Except forming pressure was 10MPa, other process was identical with embodiment 1.Quality product reaches the requirement of the superfine foundry coke of GB.
Embodiment 12
Except forming pressure was 25MPa, other process was identical with embodiment 1.Quality product reaches the requirement of the superfine foundry coke of GB.
Embodiment 13
Except temperature-rise period sees Table 11, other process is identical with embodiment 1.Quality product reaches the requirement of the superfine foundry coke of GB.
Table 11.
| Temperature section | Heating-up time, hour |
| ??20℃-250℃ | ??10 |
| ??250℃-600℃ | ??35 |
| ??600℃-800℃ | ??40 |
| ??800℃-1050℃ | ??40 |
Embodiment 14
Except temperature-rise period sees Table 12, other process is identical with embodiment 1.Quality product reaches the requirement of the superfine foundry coke of GB.
Table 12.
| Temperature section | Heating-up time, hour |
| ??20℃-250℃ | ??10 |
| ??250℃-600℃ | ??50 |
| ??600℃-800℃ | ??17 |
| ??800℃-1050℃ | ??30 |
Embodiment 15
Except temperature-rise period sees Table 13, other process is identical with embodiment 1.Quality product reaches the requirement of the superfine foundry coke of GB.
Table 13.
| Temperature section | Heating-up time, hour |
| ??20℃-250℃ | ??5 |
| ??250℃-600℃ | ??40 |
| ??600℃-800℃ | ??30 |
| ??800℃-1050℃ | ??17 |
Claims (2)
1. the preparation method of a foundry coke, this method adopts the step of following order:
(1) with the hard coal be raw material, it is broken into 1～3 millimeter, 0.18～1 millimeter respectively,＜0.18 millimeter three grade is standby;
(2) interpolation coal-tar pitch, coal tar are binding agent, and by weight percentage, the proportioning of each component is: 1～3 millimeter hard coal 20%～35%, 0.18～1 millimeter hard coal 10%～25%,＜0.18 millimeter hard coal 25%～40%, coal-tar pitch 8%～10%, coal tar 4%～6%;
(3) mix and to pinch, will above-mentioned three kinds of hard coals add earlier to mix and pinch in the pot, stirred 10 minutes under 110 ℃～130 ℃ temperature condition, coal-tar pitch, the coal tar after dissolving of will heating again adds to mix pinches pot stirring 10 minutes;
(4) roller press briquetting or impact briquetting are adopted in moulding, and forming pressure is controlled at 10MPa～40MPa; The coke lumpiness selects respectively＞80 millimeters, 80～60 millimeters,＞60 millimeters, perhaps change shape, size according to customer requirements, will mix and pinch the back sample and carry out leaving standstill 24 hours after pair roller or the impact briquetting, standby;
(5) charing, with the charring furnace charing that heats up of packing into of sample after the moulding, sample top cladding thickness is that 450 millimeters～550 millimeters coke powder is with secluding air, anti-oxidation; The heat-up rate of charing is: 20 ℃～250 ℃, 50≤℃/hour; 250 ℃～600 ℃, 10≤℃/hour; 600 ℃～800 ℃, 12≤℃/hour; 800 ℃～1050 ℃, 15≤℃/hour; Naturally be cooled to room temperature after charing finishes, remove the upper strata and cover coke powder, take out, promptly get required foundry coke product.
2. the preparation method of foundry coke according to claim 1, wherein the described charring furnace of step (5) adopts the ring type charring furnace.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510010645 CN1268717C (en) | 2005-02-05 | 2005-02-05 | Process for preparing foundry coke |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510010645 CN1268717C (en) | 2005-02-05 | 2005-02-05 | Process for preparing foundry coke |
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| Publication Number | Publication Date |
|---|---|
| CN1664067A true CN1664067A (en) | 2005-09-07 |
| CN1268717C CN1268717C (en) | 2006-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510010645 Expired - Fee Related CN1268717C (en) | 2005-02-05 | 2005-02-05 | Process for preparing foundry coke |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793643B (en) * | 2010-02-09 | 2011-08-03 | 武汉钢铁(集团)公司 | Method for refining coke used for measuring coke optical texture |
| CN102378805A (en) * | 2009-04-09 | 2012-03-14 | 新日本制铁株式会社 | Process for producing blast furnace coke |
| CN102392134A (en) * | 2011-11-24 | 2012-03-28 | 自贡市远发特种材料厂 | High-efficiency reducing agent for casting and preparation method thereof |
| CN104194816A (en) * | 2014-09-04 | 2014-12-10 | 山东巨铭能源有限公司 | Method for preparing coke |
| CN104194813A (en) * | 2014-09-04 | 2014-12-10 | 山东巨铭能源有限公司 | Method for preparing coke |
| CN106010704A (en) * | 2016-05-31 | 2016-10-12 | 北京神雾环境能源科技集团股份有限公司 | Composite binder used for brown coal powder molding, molded coal, and production method of molded coal |
| CN111944994A (en) * | 2020-06-30 | 2020-11-17 | 湖南大学 | Preparation method of manganese-containing powder pressed pellet with self-reducing performance |
-
2005
- 2005-02-05 CN CN 200510010645 patent/CN1268717C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102378805A (en) * | 2009-04-09 | 2012-03-14 | 新日本制铁株式会社 | Process for producing blast furnace coke |
| CN101793643B (en) * | 2010-02-09 | 2011-08-03 | 武汉钢铁(集团)公司 | Method for refining coke used for measuring coke optical texture |
| CN102392134A (en) * | 2011-11-24 | 2012-03-28 | 自贡市远发特种材料厂 | High-efficiency reducing agent for casting and preparation method thereof |
| CN102392134B (en) * | 2011-11-24 | 2013-03-13 | 自贡市远发特种材料厂 | High-efficiency reducing agent for casting and preparation method thereof |
| CN104194816A (en) * | 2014-09-04 | 2014-12-10 | 山东巨铭能源有限公司 | Method for preparing coke |
| CN104194813A (en) * | 2014-09-04 | 2014-12-10 | 山东巨铭能源有限公司 | Method for preparing coke |
| CN106010704A (en) * | 2016-05-31 | 2016-10-12 | 北京神雾环境能源科技集团股份有限公司 | Composite binder used for brown coal powder molding, molded coal, and production method of molded coal |
| CN111944994A (en) * | 2020-06-30 | 2020-11-17 | 湖南大学 | Preparation method of manganese-containing powder pressed pellet with self-reducing performance |
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| CN1268717C (en) | 2006-08-09 |
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