CN101314715B - Double-layer charing chamber type coke oven with wedged bottom - Google Patents
Double-layer charing chamber type coke oven with wedged bottom Download PDFInfo
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- CN101314715B CN101314715B CN2007101083976A CN200710108397A CN101314715B CN 101314715 B CN101314715 B CN 101314715B CN 2007101083976 A CN2007101083976 A CN 2007101083976A CN 200710108397 A CN200710108397 A CN 200710108397A CN 101314715 B CN101314715 B CN 101314715B
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Abstract
A slanted-bottom coke oven with a double-layer coking chamber is characterized in that the coke oven is composed of, from top to bottom, an upper burning chamber, an upper coking chamber, a lower burning chamber, a lower coking chamber, branched flues, a total flue, a coke oven base, etc., wherein the oven body slants downwards from the oven head to the oven tail, and the coke oven is laterally divided into a pre-heating and drying zone, a rapid carbonization zone and a soaking zone and is subjected to zone temperature control. High-aluminum teeth-shaped roof bricks are used for separating the chambers, and also can improve the roof strength and the heat transfer efficiency. The burning chambers are divided by partition walls into horizontal burning flues with different numbers and different functions. In the pre-heating and drying zone, cold air is introduced and preheated while the temperature of the coking chambers is decreased. In the rapid carbonization zone, gas holes and gas rising flues are arranged on the side walls of the coking chambers, so that gas is introduced into the burning chambers and is burnt after mixing with the pre-heated air, and the heat is indirectly transferred to the coking chambers to heat four sides of the coking chambers, thus achieving 'rapid fire and severe burning' of coke blank and improving coking property of the coke blank. In the soaking zone, the gas that is burnt in the rapid carbonization zone is introduced into the horizontal fire flue of the burning chambers through the horizontal fire flue of the side walls for transferring heat to the coking chamber, then is introduced into the branched flues through a gas down flue for transferring heat to the lower coking chamber and enters the total flue and is discharged in upper air through a chimney. Horizontally movable oven doors are arranged on the coking chambers on the oven head and the oven tail to control the entrance of coke blank and the discharge of formed coke.
Description
Described field
A kind of double-layer charing chamber type coke oven with wedged bottom belongs to metallurgy and coal chemical technology.
Background technology
The crude steel turnout of China is the first in the world, this situation has driven the production of China metallurgical coke, foundry coke, but the problem that faces is that the heavy caking coal reserves of production coke are less, and maldistribution, cause some coke-oven plant's feed coal shortage, wait for rice to put in one's pan, some regional coke prices are high.Formcoke from cold briquetting production is by adopting weakly caking coal or noncaking coal to allocate caking coal into or add a certain amount of binding agent, through stirring kneading, coldmoulding, then charing forms, Qualities of Formed Cokes can be adjusted to control by coal blending and thermal technology, can be used for blast furnace ironmaking raw material according to the quality of formed coke, the thermal source of cupola furnace molten iron and molten iron carburelant also can be used for the non-ferrous metal reduction, calcium carbide (calcium carbide) production, carborundum production and carbon disulphide production etc.Formed coke production can enlarge the coking coal source, and the demand of satisfying the market STRENGTH ON COKE is the New Coke-making Technology of wideling popularize.
One of formed coke production gordian technique is the structure of charring furnace, emerging stove (yurt), continuous tunnel furnace, shaft furnace, slope stove and tube furnace etc. Formed Coke Furnace can be divided on structure formation.
In emerging stove (yurt) refining formed coke industrial scale little, coking time is long, approximately needs 6 days, existenceization Jiao (surface oxidation) problem, and cold charge coldly goes out, energy consumption is large, the coking of dependent territory method.
Patent No. ZL00105251.9 discloses a kind of tunnel like of charing alms bowl structure, the dynamic charring furnace of producing continuously formed coke, has solved the oxidation of formed coke appearance, the relatively poor problem of surface strength.But there are the shortcomings such as temperature regulation is more complicated, kiln car is subjected to high temperature, flight-line maintenance is more in tunnel furnace.
Shaft furnace adopts indirect heating, the burnt problem of existence not, and upper-lower seal, environment protection condition are better, but have the problems such as formed coke adhesion, descending scaffold and output are little.Application number 200410012180.1 patents of invention " production method of the formed coke take coke powder as main raw material and tailored version coke oven ", the Formed Coke Furnace that adopts is inside and outside furnace binding, consist of an interlayer between interior external furnace body, an oblique furnace bottom is arranged at inner furnace body bottom, is tiltedly combustion chamber and heat storage cell between furnace bottom bottom and body of heater baseplane.This stove belongs to shaft furnace, and the defects of shaft furnace is arranged.
The utility model patent of the patent No. 200320111095.1 " Combined formed coke oven " is to adopt the indirect heating mode, is divided into combustion chamber and coking chamber, and the chamber temperature subregion is controlled, and makes coking chamber be divided into the stewing section of dryer section, preheating section, retort section and heat.Guaranteed formed coke coking quality.But still have the common issue with of upright furnace, namely formed coke is subjected to the burnt base static pressure in top and is out of shape at the melting softening stress-displacement stage.The formed coke adhesion, descending scaffold, this stove also needs a cover coal gas to extract out and plenum system in addition, invests relatively large.
Chinese patent 95226398 disclosed " a kind of vertical continuous coking furnace " adopts the internal heat type coke making process.It is that the high temperature hot gas in the combustion chamber is imported coking chamber, makes CARBONIZATION OF BRIQUETTES, but still has the above-mentioned common fault of erect type coke oven.
The slope stove, " anthracite powder coal formed-coke coke oven " structure as application number 96245218.1 announcements, adopt the sloping hearth furnace structure, solved the problem that coke is come out of the stove, in esse problem is that coking chamber is shorter, sectional area is larger, coking chamber is without thermograde, after moulded coal enters stove the initial stage heating violent, cause moisture, Volatile violent, the inner swelling pressure are larger, coke forms infant cracking, makes the formed coke strength degradation, exists simultaneously heating take direct heating as main, change Jiao serious, the main flue excess Temperature.The gas-fired thermal utilization is incomplete, and energy consumption is higher, and easy scaling loss main flue and chimney.Patent that application number 96122116.x " is used for the pit kiln that hard coal and weak caking coal are produced formed coke ", to increase by a stifled wall with flues that heats in the oven carbonization chamber of slope, coking chamber is divided into two coking chambers in left and right, establish the S type and erect the combustion chamber in heating wall, improved coke oven thermo-efficiency, shorten carbonization time, but still had the problems referred to above.Particularly exist the bottom of carbonization chamber local temperature too high, cause coking inhomogeneous, the top evil mind, scab in the bottom.
" two-stage process for producing large-lump cold pressed coke briquette " of application number 00122957.5 disclosure of the invention is through the fluidized-bed heat pre-treatment with fine coal, allocate pitch, bituminous coal after cooling into, through the heating kneading, after extrusion forming, charing forms, and the charring furnace of employing is also internal heat type wedged bottom charring furnace.The problem that exists is that the Coal pretreatment energy consumption is higher in earlier stage, and in coking chamber, thermalization Jiao, lack thermograde, and formed coke intensity is relatively poor.
Chinese patent 02125355 discloses a kind of " casting type coke carboniznig furnace " upper of furnace body a ladder vault, and wherein coking chamber is low oblique structure after front height.It is the combustion chamber under coking chamber.This body of heater is from bottom-heated, thereby easily causes in stove temperature irregular, and bottom temperature is overheated, and the coke maturity is different, affects quality.
Patent No. ZL200520029831.8 " pipe type form coke oven for continuous carbonization ", the formed coke heating rate is fast, but the problem that exists is the problem of materials of tubulose coking chamber, as high in refractory metal material price religion, the yield issues of the relatively poor problem of non-metallic material intensity, coke oven and coke button adhesion and coke button move the problems such as difficulty.
Summary of the invention
Goal of the invention is the shortcoming that exists for present Formed Coke Furnace, has designed a kind of novel Formed Coke Furnace, it is characterized in that coking chamber at the bottom of the Double-layer oblique alternate with the combustion chamber, can satisfy formed coke coking disciplinarian request, be formed coke process preheating and drying section in descending process, quick retort section, soaking zone.Burnt base begins strict its heating rate at each section of controlling the Automatic-descending process from entering stove, and burnt base is heated in stove on four sides, homogeneous heating, STRESS VARIATION is little, and coke button is complete, indirect heating, the top layer is not oxidated, and intensity is large, reaches the specification of quality of superior casting coke.Heating Process in Coke Oven need not outer heat supply, and thermo-efficiency is high, can satisfy the anthracite cocking requirement.
Summary of the invention is according to the coking principle and formed coke production process adhesion component is few, volatile matter is little, the characteristics that the retort process temperature answers segmentation to control, the problems such as consideration is energy-saving and cost-reducing, reduce cost, raising quality.The relative merits of comprehensive existing Formed Coke Furnace, invent a kind of without recovery, self-heating, double-deck coking chamber,, the Formed Coke Furnace of segmentation control temperature, wedged bottom.It is characterized in that the coke oven industrial scale can realize by regulating Dan Zulu quantity, the flue gas of each Dan Zulu gathers to main flue through chimney high-altitude discharge by a minute flue.Dan Zulu from top to bottom is comprised of combustion chamber, upper strata, upper strata coking chamber, lower floor combustion chamber, lower floor's coking chamber, a minute flue successively, adopts the profile of tooth fireproof high-alumina brick to separate between each chamber.Be provided with the up quirk of coal gas, the descending quirk of flue gas, secondary air up duct etc. on each chamber both walls.Require to have gas aperture, smoke hole, airport etc. according to the thermal technology on each interior side wall.
Formed Coke Furnace is designed to downward-sloping form by burner to stove tail, is beneficial to the shove charge of burnt base and coming out of the stove of formed coke, simultaneously according to the coking principle, coke oven is designed to preheating and drying section, three sections of retort section, soaking zones fast from front to back.
The preheating and drying section: the preheating of air section of coking chamber upper and lower sides combustion chamber setting is controlled at lesser temps with coking chamber, makes burnt base enter coking chamber and obtains even preheating and drying.
Quick retort section: more coal gas leadout hole is set in the coking chamber both walls, dry distillation gas is mixed with preheated air in this section importing combustion chamber, and horizontal quirk fully burns in the combustion chamber, i.e. " fast fire is violent to be burnt ", improve the temperature of this section coking chamber, improve the coking property of burnt base.
Soaking zone: the waste gas horizontal quirk on side wall after the retort section combustion chambers burn is shifted in the horizontal quirk in soaking zone combustion chamber fast, further to the coking chamber uniformly transfer heat, feed simultaneously secondary air and make gas-fired abundant, reduce the STRESS VARIATION of coking contraction process, improve the formed coke lumpiness.Waste gas imports furnace bottom through the soaking zone side wall and divides flue, the rear main flue that imports of warp-wise lower floor's coking chamber heat transfer.
Coking chamber is shaped as rectangle, and the bottom tilts at an angle, and top is high alumina tooth-shape structure refractory brick, and this structure had both increased the intensity of furnace roof, has increased again furnace roof radiative transfer area, and the coking chamber flow perturbation is increased, and has strengthened thermal conductivity.Both sides, coking chamber up and down, upper strata are heated to coking chamber indirectly by the combustion chamber, lower floor's coking chamber upside is heated by the combustion chamber, downside is by a minute flue heating, there is the flue heating left and right sides, realize the effect that coking chamber heats on four sides, also can feed appropriate air to coking chamber and carry out the direct combustion heating of dry distillation gas.The coking chamber side wall requires to be provided with the coal gas leadout hole in the rapid heating section according to the thermal technology.Gas aperture adopts the inclination vesicular structure, avoids coke to seal in quirk.
The combustion chamber is divided into the not quirk of same-action with refractory brick, blowing air in drying and preheating section (burner side) quirk when air is preheated, reduces the coking chamber temperature, avoid the formed coke base because moisture, volatile matter are acutely separated out, cause formed coke to produce the even explosion of hidden crackle.
The combustion chamber is provided with horizontal quirk in quick retort section and soaking zone both sides, is communicated with coking chamber coal gas flue at the horizontal quirk of retort section fast, is mixed into each quirk of combustion chamber at this preheated air and coal gas and fully burns.A small amount of coal gas that flue gas after burning comes on the horizontal quirk of opposite side and coking chamber coal gas quirk mixes, through the horizontal quirk sufficient combustion in soaking zone side wall horizontal quirk importing soaking zone combustion chamber.Flue gas is the descending quirk of flue gas on the another side wall of soaking zone, imports a minute flue downwards.Import main flue after warp-wise lower floor coking chamber conducts heat, by the chimney high altitude discharge, or deliver to the coal drying section by induced draft fan, emptying after recovery heat energy.
The invention example
A coke oven is high 45 meters by one, the brick chimney that bore ф is 1.4 meters, a sectional area 2m
2Main flue and 20 Dan Zulu that connect together form.Single furnace structure is separated by high alumina profile of tooth top board brick 14 between each chamber for from top to bottom being made of combustion chamber, upper strata 1, upper strata coking chamber 2, lower floor combustion chamber 3, lower floor's coking chamber 4, a minute flue 5.Coking chamber is rectangular configuration, and bottom of carbonization chamber and top structure are ramp structure, and (120 * 120mm) hot slope of repose are determined according to the bulk foundry coke at the angle of inclination.The coking chamber top structure is that (800 * 400 * 200mm) structures, brick and brick junction overlap mutually the profile of tooth alumina firebrick, reduce gas leakage.The quick retort section 22 left and right side walls of coking chamber are provided with coal gas leadout hole 13, and lower floor's coking chamber right side gas aperture is more, and the left side is less.Left side wall gas aperture 13 is more for the upper strata coking chamber, and the right side is less.Chamber structure and coking chamber structural similitude adopt the thick refractory brick of 60mm that the combustion chamber is divided into three groups of not horizontal firing chambers of same-action, and partition wall 25 seals to upper lower roof plate brick 14 seams simultaneously.Left and right, combustion chamber side wall is provided with horizontal quirk 20 and is connected with trade 10,11 under gas uptake 6, flue gas.Coke oven laterally is comprised of burner 28, preheating and drying section 21, quick retort section 22, soaking zone 23, stove tail 29.Burner is provided with fire door 18, furnace door guide rail 27, directly air supply hole 9, air supply hole 7, secondary air supply hole 8.Fire door 18 is made by cast iron framework cast refractory concrete, and fire door central authorities are provided with and have 4 steamboats on peephole 26, fire door, and fire door is moved in guide rail, open smoothly or close fire door, and furnace door guide rail has furnace retaining ironware function concurrently.Be the coaling machine tool before burner 28, can be simultaneously the upper and lower coking chamber dress formed coke base.
Combustion chamber, upper strata 1 and the lower floor combustion chamber 3 of preheating and drying section are provided with air preheating chamber, air enters air preheating chamber by an air supply hole 7, this section coking chamber temperature is reduced, the burnt base of reason acutely is not subjected to the thermosetting thermal explosion or causes crackle, affects formed coke lumpiness and physical strength.
According to weak caking coal or no adhesion coal volatile matter and the less characteristics of adhesion component, improve the coking property of coal blending for reaching " fast fire is violent to be burnt ", having more gas aperture 13 on retort section 22 coking chamber right-side wall fast, make the carbonization gas major part concentrate on this section derivation, fully burn by the air mixed that the gas uptake 6 on side wall enters after combustion chamber (2,4) and 21 preheatings of preheating and drying section, the combustion heat is given neighbouring coking chamber 2 through profile of tooth top board 14 through conduction and radiative transfer, 4, coking chamber is heated on four sides.Work as anthracite cocking, when the coal gas amount is less, also can feed a small amount of air by direct air supply hole 9, make coal gas directly in the coking chamber burning, the requirement of real realization the " fast fire is violent to be burnt ".
The horizontal quirk 20 of flue gas after burning in the wall of combustion chamber left side mixes with a small amount of coal gas on the gas uptake 6 of coking chamber left side, elongate flame, enter the horizontal quirk 20 of soaking zone, enter in the horizontal firing chamber of soaking zone combustion chamber through smoke hole 12, after further fully burning, flue gas descending quirk 10 in combustion chamber and coking chamber right-side wall enters minute flue 5, continues the sensible heat of high-temperature flue gas is conducted to upper strata coking chamber 4.
Divide at soaking zone to be provided with the smoke hole 12 that the lower floor combustion chamber is come on the flue right-side wall, have the combustion chamber, upper strata and lead next smoke hole 12 on the wall of left side.For sufficient combustion or adjusting temperature convenience, have secondary air supply hole 8 on minute flue side wall.Flue gas after heat is effectively reached the upper strata coking chamber, enters main flue 19 after minute flue plugboard is regulated suction under the disturbance of profile of tooth top board.Coal gas elongates flame through air feed repeatedly, after score of firings, heat is effectively utilized, and has improved the thermo-efficiency of coke oven, makes the emission of smoke tallies environmental requirement.
Be homogeneous heating, the gas flow of combustion chamber, upper strata 1 and coking chamber 2 is opposite with 4 gas flows of lower floor's coking chamber with lower floor combustion chamber 3, and corresponding flue gas imports respectively minute flue 5 by flue in the soaking zone both walls.
The bed rearrangement coke oven construction is compact, coking chamber is double-deck to be arranged, thermo-efficiency is high, take up an area few, door opened convenience, need electronic.Fire door is provided with peephole 26, can doublely do thermometer hole.Each organizes wind of stove, secondary air, respectively organizes stove by a Fans concentrated supply respectively, controls air quantity by sub valve, the furnace temperature flexible adjustment.
Burner 28 is provided with coal charger, guide rail, and a coal charger can be coaling successively for many group stoves.Stove tail 29 is provided with quenching car and guide rail, can adopt dry quenching(of coke) technique, also can adopt the wet quenching technique with gas wash tower.
Furnace roof is provided with thermal insulation layer and waterproof layer, and furnace bottom is provided with concrete foundation, is provided with main flue 19 on burner side concrete foundation, and a minute flue 5 is connected by adjustable plate at burner with main flue 19.The stove surrounding is provided with the furnace retaining ironware.Burner 30 is provided with coal charging car track, is connected with the briquette production workshop.Stove tail 31 is provided with coke-quenching vehicle track, joins with coke quenching tower or dry quenching(of coke) device.
Description of drawings
Accompanying drawing 1 is the Formed Coke Furnace transverse cross-sectional view
Accompanying drawing 2 is the Formed Coke Furnace longitudinal sectional drawing
Accompanying drawing 3 is combustion chamber, upper strata horizontal sectional drawing
Accompanying drawing 4 is lower floor's combustion chamber horizontal sectional drawing
Accompanying drawing 5 is the burner front view of many group stoves
The accompanying drawing marking explanation:
1. quick retort section 23 soaking zone 24. auxiliary air road 25. combustion chamber partition wall 26. peephole 27 furnace door guide rail 28 burner 29 stove tail 30 furnace roof 31 furnace bottoms of 7. air supply holes of combustion chamber, upper strata 5. minutes flue 6. coal gas rising quirks of 2. upper strata carbonization chamber 3. lower floor combustion chamber 4. lower floor's carbonization chambers direct air supply hole 10. trade, flue gas bottom right 11. trade, flue gas lower-left 12. smoke hole 13. gas vent 14. profile of tooth top board brick 15. common brick 16. refractory brick 17. concrete foundation 18. fire door horizontal quirk 21. preheating and drying section 22. of 19. main chimney flue 20. of 8. secondary air supply hole 9.
Claims (1)
1. a double-layer charing chamber type coke oven with wedged bottom, is characterized in that body of heater is followed successively by combustion chamber, upper strata, upper strata coking chamber, lower floor combustion chamber, lower floor's coking chamber and minute flue from top to bottom, adopts the profile of tooth fireproof high-alumina brick to separate between each chamber; Body of heater is from burner to the stove tail inclined form that is designed to dip down, and is followed successively by preheating and drying section, retort section and soaking zone fast from burner to stove tail;
Combustion chamber, upper strata and lower floor combustion chamber are divided into the not quirk of same-action with refractory brick, blowing air in drying and preheating section burner side quirk, when air is preheated, upper strata coking chamber and lower floor's coking chamber temperature are reduced, avoid the formed coke base because moisture evaporation is acutely separated out, cause formed coke to produce the even explosion of hidden crackle; Combustion chamber, upper strata and lower floor combustion chamber are provided with horizontal quirk in quick retort section and soaking zone both sides, are communicated with upper strata coking chamber and lower floor's coking chamber by flue at the horizontal quirk of retort section fast; In quick retort section, preheated air and coal gas are mixed into the combustion chamber, upper strata and each quirk of lower floor combustion chamber fully burns, a small amount of coal gas that flue gas after burning comes on the horizontal quirk of opposite side and upper strata coking chamber and lower floor's coking chamber flue mixes, horizontal quirk on the soaking zone side wall imports the soaking zone combustion chamber and fully burns, the descending quirk of the flue gas of flue gas on the soaking zone side wall imports a minute flue downwards;
Both sides, coking chamber up and down, upper strata are by combustion chamber, upper strata and lower floor's combustion chamber heating, lower floor's coking chamber upside is by lower floor's combustion chamber heating, downside is by a minute flue heating, and there is the flue heating both sides of upper strata coking chamber and lower floor's coking chamber, have realized the effect that coking chamber heats on four sides; The upper and lower coking chamber is provided with the coal gas leadout hole on the both walls of quick retort section;
The preheating and drying section: the preheating of air section that upper strata coking chamber and lower floor's coking chamber upper and lower sides combustion chamber arrange is controlled at lower temperature with upper strata coking chamber and lower floor's coking chamber, obtains even preheating and drying after making burnt base enter coking chamber;
Quick retort section: on upper strata coking chamber and lower floor's coking chamber both walls, the coal gas leadout hole is set, dry distillation gas is mixed with preheated air in this section importing combustion chamber, fully burn in the horizontal quirk in combustion chamber, improve the temperature of this section coking chamber, improve the coking property of burnt base;
Soaking zone: the waste gas after quick retort section combustion chambers burn, horizontal quirk on side wall is shifted in the horizontal quirk in soaking zone combustion chamber, further to upper strata coking chamber and lower floor's coking chamber uniformly transfer heat, feeding simultaneously secondary air fully burns coal gas, reduce the STRESS VARIATION in the coking contraction process, improve the formed coke lumpiness, waste gas imports furnace bottom through the soaking zone side wall and divides flue, the rear main flue that imports of warp-wise lower floor's coking chamber heat transfer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101083976A CN101314715B (en) | 2007-05-30 | 2007-05-30 | Double-layer charing chamber type coke oven with wedged bottom |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101083976A CN101314715B (en) | 2007-05-30 | 2007-05-30 | Double-layer charing chamber type coke oven with wedged bottom |
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| CN101314715A CN101314715A (en) | 2008-12-03 |
| CN101314715B true CN101314715B (en) | 2013-05-08 |
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| CN2007101083976A Expired - Fee Related CN101314715B (en) | 2007-05-30 | 2007-05-30 | Double-layer charing chamber type coke oven with wedged bottom |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104531190B (en) * | 2015-01-16 | 2017-02-01 | 中国矿业大学 | Process for simultaneously producing machine coke and molded coke by use of stamp-charging coke oven |
| CN108264908B (en) * | 2016-12-30 | 2023-08-15 | 华泰永创(北京)科技股份有限公司 | Coke oven foundation structure and coke oven |
| CN109294607A (en) * | 2018-11-15 | 2019-02-01 | 山西沁新能源集团股份有限公司 | The furnace body unit and coke oven of coke oven |
| CN110566974B (en) * | 2019-09-16 | 2024-05-31 | 谢樱 | Novel pyrolysis device |
| CN115353893A (en) * | 2022-07-29 | 2022-11-18 | 中冶焦耐(大连)工程技术有限公司 | Top structure of coke oven carbonization chamber |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE448591C (en) * | 1926-02-28 | 1927-08-27 | Stettiner Chamotte Fabrik Akt | Furnace system with sloping degassing rooms |
| CN1153808A (en) * | 1996-10-21 | 1997-07-09 | 冯元喜 | Multifunctional slope-tunnel coke oven |
| CN2269398Y (en) * | 1996-11-13 | 1997-12-03 | 晋城市望云煤矿 | Anthracite powder coal formed-coke coke oven |
| CN1470602A (en) * | 2002-07-26 | 2004-01-28 | 商丘市普天工贸有限公司煤化工研究所 | Casting type coke carboniznig furnace |
-
2007
- 2007-05-30 CN CN2007101083976A patent/CN101314715B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE448591C (en) * | 1926-02-28 | 1927-08-27 | Stettiner Chamotte Fabrik Akt | Furnace system with sloping degassing rooms |
| CN1153808A (en) * | 1996-10-21 | 1997-07-09 | 冯元喜 | Multifunctional slope-tunnel coke oven |
| CN2269398Y (en) * | 1996-11-13 | 1997-12-03 | 晋城市望云煤矿 | Anthracite powder coal formed-coke coke oven |
| CN1470602A (en) * | 2002-07-26 | 2004-01-28 | 商丘市普天工贸有限公司煤化工研究所 | Casting type coke carboniznig furnace |
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