CN107089661A - A kind of calcium focal sphere group classification hot legal system power taking stone production technology of oxygen - Google Patents
A kind of calcium focal sphere group classification hot legal system power taking stone production technology of oxygen Download PDFInfo
- Publication number
- CN107089661A CN107089661A CN201710455218.XA CN201710455218A CN107089661A CN 107089661 A CN107089661 A CN 107089661A CN 201710455218 A CN201710455218 A CN 201710455218A CN 107089661 A CN107089661 A CN 107089661A
- Authority
- CN
- China
- Prior art keywords
- calcium
- moving bed
- oxygen
- sphere group
- kiln
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Landscapes
- Carbon And Carbon Compounds (AREA)
- Furnace Details (AREA)
Abstract
A kind of calcium focal sphere group classification hot legal system power taking stone production technology of oxygen, 5 30mm calcium focal sphere group is added in moving bed preheater by feeder, exchanged heat with the air burning flue gas adverse current that bottom rises to 600 1300 DEG C, the kiln tail of rotary kiln reactor is then entered by preheater bottom plug valve controlling stream；Hot calcium focal sphere group is heated to 1,400 1900 DEG C in 1.5 10 ° of gradient, 2.0 50 revs/min of rotary kiln by the coke powder of injection from kiln head and oxygen thermal-flame, and reaction generation calcium carbide, releasing CO contain CO and H2Pyroreaction circulation of vital energy in the wrong direction stream flow to the air burning flue gas that kiln tail generates preheating with adding air and coke powder mixed combustion；After the calcium carbide of generation flows into insulation moving bed reinforcing reaction 5 90 minutes from kiln hood outlet, flow into grate cooler from insulation moving bed bottom and cool to less than 100 DEG C as product, the inert gas of heating reclaims to be pressurized again after heat and is recycled back to grate cooler and takes heat；The rear air burning gas that changes at the top of moving bed preheater is reclaimed after heat by the useless pot of compensation combustion type, is arranged outside air-introduced machine.
Description
1. technical field
The present invention provides a kind of calcium focal sphere group classification hot legal system power taking stone production technology of oxygen, is related to coal chemical technology.
2. background technology
Current acetylene is mainly mass produced by carbide, is the important source material of organic synthesis industry.Calcium carbide be with
Quick lime and carbon are raw material, are generated in furnace of calcium carbide by complicated physicochemical change.It is used as a kind of novel carbon
Material, semicoke be weak bonding or non-caking coal using high volatile as raw material, in, low temperature distillation charing remove coal in tar
Solid product after material and most of volatile is with its fixed carbon height, resistivity height containing ash is low, sulfur content is low, phosphorus content is low
Characteristic and cheap price, be just progressively applied to the production of the products such as calcium carbide, ferroalloy, it is expensive with fictitious hosts
Metallurgical coke, semicoke is used as metallurgy industry important raw and processed materials.
Presently most ripe calcium carbide production method is traditional electrothermal way.Grain of the electrothermal way production technology to block stock
The fixed carbon that degree and the quality content that has calcium oxide in certain requirement, quick lime are greater than in 92%, coke need to be more than 84%,
Ash content is less than 15%, moisture less than 3%, and fugitive constituent is less than 1.5%；The granularity of raw material is particularly significant to production process, especially
It is the granularity of quick lime, undersized can cause furnace gas smoothly to discharge, the problems such as causing " collapsing bed ", granularity crosses conference reduction
Contact area between coke and calcium oxide, influences transfer performance, reduces reaction rate；The industrial general particle diameter model for requiring raw material
Enclose for 5-30mm.Because the contact area between block coke and CaO (5-30mm) is small, solid-solid reaction is by the tight of transmittance process
Limit again, course of reaction needs by quick lime molten state and penetrated into coke briquette to chemically react so that electric arc furnaces is anti-
It should need to carry out (2000-2200 DEG C) at high temperature, reaction time length (1-2h), single stove production capacity is low (70kt/a), and calcium carbide per ton is (pure
The high energy consumption of degree 80%) reaches 3250kWh, and the thermal efficiency is only 50%；In addition calcium carbide product is up to 2000 DEG C for interval discharge
Liquid liquation above, heat recovery is difficult, and operative's work situation is severe, there is secondary pollution and hidden peril of explosion, technique
Urgently improve.
The hot method calcium carbide production technology of oxygen, is exactly to be burnt to produce electricity stone instead of electrical heating next life in furnace of calcium carbide using fuel, kept away
Exempt from the energy loss in coal fired generation process；And it can be closed with coal pyrolysis grading process lotus root, reduce industrial residue discharge, have
Hope the new technology route for forming a coal comprehensive utilization.Since 1950s, people produce calcium carbide for the hot method of oxygen
Research never stop, or so nineteen sixty, the U.S., German and Dutch three state produce with regard to oneself through having built the hot method of oxygen of pilot-scale
Calcium carbide device, external also the hot method of oxygen of existing slightly scale produces calcium carbide device at present, and root according to relevant report, often produces one ton of electricity
Stone needs consumption oxygen 1560Nm3, consumption coke 2.8t, quick lime 1.2t, and 600 degree of power consumption is also needed in addition.Although Liu Zhenyu etc.
According to the theory of the hot method of oxygen by studying the course of reaction of powdered coke and calcium oxide, it is proposed that a kind of new production side of calcium carbide
Method, 0.3mm powdery carbon raw material (coal or coke) and powdery calcic raw material (calcium carbonate, calcium oxide, hydrogen-oxygen is less than using granularity
Change calcium or carbide slag) technique of calcium carbide is produced, and propose two kinds of structure of reactor.But examine due to structure of reactor and not
Consider the calcium carbide fusing point W type changing rules caused with carbonization intracellular calcium content change, the hot method of oxygen produces the technology path and electric heating of calcium carbide
Method is equally liquid form product, and the selection of calcium coke ratio is unreasonable, causes calcium carbide heat recovery difficult, and raw material preheating is still high using by-product
Warm CO, compared with the hot method technique of external oxygen, oxygen consumption and carbon consumption are showed no and are greatly lowered, and industry test and industrialization are had no at present
As a result.
Quick lime and coke adding procedure is cumbersome, complexity in current electric arc furnaces heating technical process, and in lime stone
With semi-coke during whole production and use, all the time along with solid is broken, the process such as screening solids and solid transportation, this
A little processes can produce a large amount of powdery quick lime semicokes or coke for being less than 6mm, it would be highly desirable to utilize.
More nervous additionally, due to fat lime stone resource, exploitation destroys serious to massif environment, and various regions are opened lime stone
Control of excavation quantity is more and more tighter, the bottleneck produced as domestic quick lime, it would be highly desirable to make full use of active ingredient in carbide slag, improves stone
The cyclic utilization rate of lime stone.
Therefore the new technology and relevant equipment skill of calcium carbide and acetylene can be produced using calcium lime powder and coke powder by being badly in need of exploitation
Art, improves the cyclic utilization rate of carbide slag, reduces reaction temperature, accelerates reaction speed, reduction energy consumption and cost, improves electricity
The disposal ability and heat recovery rate of stone stove, eliminate secondary pollution.
3. the content of the invention
The invention aims to a kind of calcium focal sphere for overcoming the shortcomings of existing electric furnace heating production acetylene and inventing
Group's classification hot legal system power taking stone production technology of oxygen, reasonable selection calcium coke ratio, it is solid phase that product is ensured while highly effective reaction, is easy to
Waste heat recovery；Reaction coke powder and combustion heat supplying coke powder are individually separated, and select different combustion adjuvant fractional combustions, are reduced oxygen consumption, are subtracted
Light waste gas utilization and intractability；The reaction of calcium focal sphere group had both solved the recycling problem of calcium lime powder and coke powder, reduced again
Reaction temperature, reaction speed of accelerating, reduction energy consumption and cost, the disposal ability for improving furnace of calcium carbide, also achieve high-quality
The recycling of limestone resource, eliminate solid waste pollution.
Technical scheme：5-30mm calcium focal sphere group is added in moving bed preheater by feeder, with
The air burning flue gas adverse current risen from moving bed preheater bottom exchanges heat to 600-1300 DEG C, then passes through moving bed preheater
The high temperature plug valve controlling stream of bottom enters the kiln tail of rotary kiln reactor；Hot calcium focal sphere group is with 1.5-10 ° of gradient, 2.0-50
Rev/min rotary kiln in be heated to 1400-1900 DEG C by the coke powder and oxygen thermal-flame of injection from kiln head, reaction generation electricity
Stone, releasing CO, contain CO and H2Pyroreaction circulation of vital energy in the wrong direction stream flow to kiln tail with add air and coke powder mixed combustion generation preheat
Air burning flue gas；After the calcium carbide of generation flows into insulation moving bed reinforcing reaction 5-90 minutes from kiln hood outlet, from insulation
Moving bed bottom flows into grate cooler and cools to less than 100 DEG C as product, and the inert gas of heating is reclaimed after heat and quilt
Pressurized circulation returns grate cooler and takes heat；The rear air burning gas that changes at the top of moving bed preheater passes through dedusting and the useless pot of compensation combustion type
Reclaim after heat, arranged outside air-introduced machine.
Wherein, moving bed preheater top center is provided with rotatory sealing feeder and tremie pipe, blanking pipe range 50-
1000mm；Top-side, which is provided with, changes the outlet of rear air burning flue gas, be sequentially connected respectively gas-solid separator, compensation combustion type give up pot and
Air-introduced machine；Bottom is grate type conical head, is easy to anti-air burning flue gas to enter moving bed preheater heating calcium focal sphere group, opens
Porosity 10%-70%, cone angle 45%-150%；Tremie pipe is set in the middle part of grate type conical head, and tremie pipe outlet is provided with resistance to
High temperature plug valve, controls discharge quantity.
The length of rotary kiln reactor is 20-80m, and kiln tail is provided with coke powder air-breathing burner, and kiln hood is provided with coke powder
Oxygen burner, rotary kiln reactor uses magnesia carbon brick, spinel brick or Direct bond magnesia-chrome brick and mould material.
Insulation moving bed is rectangular configuration, and bottom sets conical head, and cone angle 45%-150%, center is provided with and moving bed
The fillet seam of equal length, width 50-300mm.
Embodiment is described the features of the present invention by the present invention in detail.
4. brief description of the drawings
Accompanying drawing is process schematic representation of the invention.
The drawing of accompanying drawing is described as follows：
1st, feeder 2, moving bed preheater 3, gas-solid separator 4, compensation combustion type useless pot 5, air-introduced machine 6, coke powder air-breathing
Burner 7, grate type conical head 8, high temperature plug valve 9, rotary kiln reactor 10, coke powder oxygen burner 11, kiln hood outlet 12, guarantor
Warm moving bed 13, grate cooler 14, the booster fan 16 of heat exchanger 15, calcium carbide product blow-off valve
With reference to the accompanying drawings and examples come be described in detail the present invention process characteristic.
5. embodiment
Embodiment, 5-30mm calcium focal sphere group is added in moving bed preheater (2) by feeder (1), and from shifting
The air burning flue gas adverse current heat exchange that dynamic bed preheater (2) bottom rises arrives 600-1300 DEG C, then passes through moving bed preheater
(2) high temperature plug valve (8) control of bottom flows into the kiln tail of rotary kiln reactor (9)；Hot calcium focal sphere group is with gradient 1.5-
The coke powder and oxygen thermal-flame being blown in 10 °, 2.0-50 revs/min of rotary kiln by kiln hood coke powder oxygen burner (10) add
Heat arrives 1400-1900 DEG C, and reaction generation calcium carbide, releasing CO contain CO and H2Pyroreaction circulation of vital energy in the wrong direction stream flow to kiln tail with passing through
Coke powder air-breathing burner (6) adds air and coke powder mixed combustion generates the air burning flue gas of preheating；The calcium carbide of generation
After flowing into insulation moving bed (12) reinforcing reaction 5-90 minutes from kiln hood outlet (11), flow into and comb from insulation moving bed (12) bottom
Formula cooler (13) cools to 100 DEG C and discharged below by way of calcium carbide product blow-off valve (16) as product, the inert gas of heating
Reclaimed by heat exchanger (14) after heat and pressurized blower fan (15) pressurized circulation returns grate cooler (13) and takes heat；Moving bed is preheated
The rear air burning gas that changes at the top of device (2) is reclaimed after heat by gas-solid separator (3) dedusting and the useless pot (4) of compensation combustion type, is drawn
Blower fan (5) is arranged outside.
Wherein, moving bed preheater (2) top center is provided with rotatory sealing feeder (1) and tremie pipe, blanking pipe range 50-
1000mm；Top-side is provided with the outlet for changing rear air burning flue gas, and gas-solid separator (3), compensation combustion type are sequentially connected respectively and is given up
Pot (4) and air-introduced machine (5)；Bottom is grate type conical head (7), is easy to anti-air burning flue gas to enter moving bed preheater
(2) heating calcium focal sphere group, percent opening 10%-70%, cone angle 45%-150%；Blanking is set in the middle part of grate type conical head (7)
Pipe, tremie pipe outlet is provided with high temperature resistant plug valve (8), controls discharge quantity.
The length of rotary kiln reactor (1) is 20-80m, and kiln tail is provided with coke powder air-breathing burner (6), and kiln hood is set
There is coke powder oxygen burner (10), rotary kiln reactor (9) is using magnesia carbon brick, spinel brick or Direct bond magnesia-chrome brick and pours
Note material.
It is rectangular configuration to be incubated moving bed (12), and bottom sets conical head, and cone angle 45%-150%, center is provided with and moved
The fillet seam of dynamic bed equal length, width 50-300mm.
The calcium focal sphere group classification hot legal system power taking stone production technology of oxygen provided by the present invention, selects reasonable calcium coke ratio, makes electricity
The calcium content that is carbonized in stone is more than 78%, it is ensured that calcium carbide product is solid-state in rotary kiln reactor, is easy to flowing and waste heat recovery；Instead
Coke powder is answered to prepare calcium focal sphere group reaction in-situ production calcium carbide, combustion heat supplying coke powder is respectively from difference in burner and combustion-supporting
Combustion adjuvant fractional combustion, reduction oxygen consumption more than 60%, alleviates waste gas utilization and intractability, while impurity is separated in carbide slag
Difficulty is reduced；Calcium focal sphere group reaction in-situ calcium carbide make use of cheap coke powder and powdered lime, reduce by 300 DEG C of reaction temperature with
On, accelerate reaction speed more than 1 times, realize calcium carbide and continuously produce, reduce production cost more than 30%, reduce power consumption 80%,
Carbide slag cyclic utilization rate is also achieved more than 80%, carbide slag pollution is eliminated；Grate cooler reclaims calcium carbide discharge heat
More than 70%, secondary pollution and the explosion danger of high temperature calcium carbide liquid discharge are eliminated, the work situation of workman is improved.
Claims (4)
1. a kind of calcium focal sphere group classification hot legal system power taking stone production technology of oxygen, it is characterized in that by 5-30mm calcium focal sphere group pass through into
Glassware is added in moving bed preheater, with the air burning flue gas adverse current heat exchange that rises from moving bed preheater bottom to 600-
1300 DEG C, the kiln tail of rotary kiln reactor is then entered by the high temperature plug valve controlling stream of moving bed preheater bottom；Hot calcium focal sphere
Group is heated in the rotary kiln of 1.5-10 °, 2.0-50 revs/min of gradient by the coke powder of injection from kiln head and oxygen thermal-flame
To 1400-1900 DEG C, reaction generation calcium carbide, releasing CO contain CO and H2Pyroreaction circulation of vital energy in the wrong direction stream to flow to kiln tail empty with adding
Gas and coke powder mixed combustion generate the air burning flue gas of preheating；It is strong that the calcium carbide of generation flows into insulation moving bed from kiln hood outlet
After changing reaction 5-90 minutes, flow into grate cooler from insulation moving bed bottom and cool to less than 100 DEG C as product, heating
Inert gas, which is reclaimed after heat again, pressurized to be recycled back to grate cooler and takes heat；Rear air burning is changed at the top of moving bed preheater
Gas is given up by dedusting and compensation combustion type after pot recovery heat, is arranged outside air-introduced machine.
2. a kind of calcium focal sphere group classification hot legal system power taking stone production technology of oxygen according to claim 1, it is characterised in that move
Dynamic bed preheater top center is provided with rotatory sealing feeder and tremie pipe, blanking pipe range 50-1000mm；Top-side is provided with and changed
The outlet of air burning flue gas afterwards, is sequentially connected the useless pot of gas-solid separator, compensation combustion type and air-introduced machine respectively；Bored for grate type bottom
Shape end socket, is easy to anti-air burning flue gas to enter moving bed preheater heating calcium focal sphere group, percent opening 10%-70%, cone angle
45%-150%；Tremie pipe is set in the middle part of grate type conical head, and tremie pipe outlet is provided with high temperature resistant plug valve, controls blanking
Amount.
3. a kind of calcium focal sphere group classification hot legal system power taking stone production technology of oxygen according to claim 1, it is characterised in that rotation
The length of rotary kiln reactor is 20-80m, and kiln tail is provided with coke powder air-breathing burner, and kiln hood is provided with coke powder oxygen burner,
Rotary kiln reactor uses magnesia carbon brick, spinel brick or Direct bond magnesia-chrome brick and mould material.
4. a kind of calcium focal sphere group classification hot legal system power taking stone production technology of oxygen according to claim 1, it is characterised in that protect
Warm moving bed is rectangular configuration, and bottom sets conical head, and cone angle 45%-150%, center is provided with narrow with moving bed equal length
Bar is stitched, width 50-300mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710455218.XA CN107089661B (en) | 2017-06-16 | 2017-06-16 | A kind of calcium focal sphere group classification oxygen thermal method produces calcium carbide production technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710455218.XA CN107089661B (en) | 2017-06-16 | 2017-06-16 | A kind of calcium focal sphere group classification oxygen thermal method produces calcium carbide production technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107089661A true CN107089661A (en) | 2017-08-25 |
| CN107089661B CN107089661B (en) | 2019-03-29 |
Family
ID=59640129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710455218.XA Active CN107089661B (en) | 2017-06-16 | 2017-06-16 | A kind of calcium focal sphere group classification oxygen thermal method produces calcium carbide production technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107089661B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113753898A (en) * | 2021-08-19 | 2021-12-07 | 首钢集团有限公司 | Method for improving purity of calcium carbide |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101817525A (en) * | 2010-05-14 | 2010-09-01 | 山西亿众公用事业有限公司 | Process and device for producing calcium carbide by using powder raw materials through two-stage method |
| CN101830464A (en) * | 2010-05-14 | 2010-09-15 | 山西亿众公用事业有限公司 | Technique for producing calcium carbide and cogeneration by two-stage method and device thereof |
| CN102153085A (en) * | 2010-12-03 | 2011-08-17 | 中国五环工程有限公司 | Method for preparing calcium carbide and synthesis gas through thermal oxidation reaction and calcium carbide reactor |
| CN103272536A (en) * | 2012-06-21 | 2013-09-04 | 北京化工大学 | Composite bed reactor and method for combined production of calcium carbide, gas and tar |
| CN106672972A (en) * | 2016-12-12 | 2017-05-17 | 神雾环保技术股份有限公司 | System and method for preparing calcium carbide |
-
2017
- 2017-06-16 CN CN201710455218.XA patent/CN107089661B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101817525A (en) * | 2010-05-14 | 2010-09-01 | 山西亿众公用事业有限公司 | Process and device for producing calcium carbide by using powder raw materials through two-stage method |
| CN101830464A (en) * | 2010-05-14 | 2010-09-15 | 山西亿众公用事业有限公司 | Technique for producing calcium carbide and cogeneration by two-stage method and device thereof |
| CN102153085A (en) * | 2010-12-03 | 2011-08-17 | 中国五环工程有限公司 | Method for preparing calcium carbide and synthesis gas through thermal oxidation reaction and calcium carbide reactor |
| CN103272536A (en) * | 2012-06-21 | 2013-09-04 | 北京化工大学 | Composite bed reactor and method for combined production of calcium carbide, gas and tar |
| CN106672972A (en) * | 2016-12-12 | 2017-05-17 | 神雾环保技术股份有限公司 | System and method for preparing calcium carbide |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113753898A (en) * | 2021-08-19 | 2021-12-07 | 首钢集团有限公司 | Method for improving purity of calcium carbide |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107089661B (en) | 2019-03-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101538631B (en) | Process and device for smelting ferronickel and nickel-containing molten iron by using lower-nickel materials | |
| CN105567897B (en) | Iron making method and kiln | |
| CN101538629A (en) | Process and device for smelting chromium irons and chromium-containing molten iron by using chromium ore powder | |
| CN105366964B (en) | Lime, coke and calcium carbide produce combined unit | |
| CN101538634A (en) | Smelting process and device of pure iron | |
| US3206299A (en) | Dense-bed, rotary, kiln process and apparatus for pretreatment of a metallurgical charge | |
| CN101538630A (en) | Process and device for preparing chromium iron by using chromium ore powder | |
| CN101538632A (en) | Preparation process and device of sponge iron | |
| CN103740939A (en) | Method for producing molten iron and recovering zinc by utilizing zinc-containing dust or sludge in steelworks | |
| CN101787408B (en) | Method for producing direct reduced iron by utilizing sensible heat of raw gas | |
| CN101956037A (en) | Method and device for indirect heating type reduction iron making | |
| CN109897672A (en) | The device and method produced using circulation of tail gas coal gasification | |
| JPH0380850B2 (en) | ||
| CN107652997A (en) | A kind of powdery semi-coke preparation facilities and technique | |
| CN204752780U (en) | Melting reduction iron -smelting device | |
| JPH0319175B2 (en) | ||
| CN101749931A (en) | Smelting furnace | |
| CN107089661B (en) | A kind of calcium focal sphere group classification oxygen thermal method produces calcium carbide production technology | |
| CN85106835A (en) | Produce the apparatus and method for of white cement clinker | |
| CN207391014U (en) | A kind of device of the hot method production calcium carbide of calcium focal sphere group classification oxygen | |
| CN113277513B (en) | Calcium carbide co-production system | |
| CN107117618A (en) | A kind of hot method of calcium focal sphere group classification oxygen produces the device of calcium carbide | |
| CN107325844A (en) | A kind of feature gasification production system | |
| CN205856557U (en) | A kind of for carbonaceous material circulation calciner | |
| CN101845529B (en) | Preheating reduction furnace for iron making through smelting reduction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |