CN201514116U - Electric furnace in direct connection with rotary kiln - Google Patents
Electric furnace in direct connection with rotary kiln Download PDFInfo
- Publication number
- CN201514116U CN201514116U CN2009201647649U CN200920164764U CN201514116U CN 201514116 U CN201514116 U CN 201514116U CN 2009201647649 U CN2009201647649 U CN 2009201647649U CN 200920164764 U CN200920164764 U CN 200920164764U CN 201514116 U CN201514116 U CN 201514116U
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- China
- Prior art keywords
- electric furnace
- rotary kiln
- nickel
- direction connection
- furnace
- 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.)
- Expired - Lifetime
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- 239000000779 smoke Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 229910000863 Ferronickel Inorganic materials 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 239000003638 chemical reducing agent Substances 0.000 abstract description 3
- 238000005245 sintering Methods 0.000 abstract description 3
- 239000005431 greenhouse gas Substances 0.000 abstract description 2
- 238000010924 continuous production Methods 0.000 abstract 1
- 239000002689 soil Substances 0.000 abstract 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 41
- 229910052759 nickel Inorganic materials 0.000 description 20
- 239000000463 material Substances 0.000 description 10
- 238000006722 reduction reaction Methods 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000002893 slag Substances 0.000 description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910001356 Nickel pig iron Inorganic materials 0.000 description 3
- 239000002817 coal dust Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 241001417490 Sillaginidae Species 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 229910000480 nickel oxide Inorganic materials 0.000 description 2
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 2
- 230000001603 reducing effect Effects 0.000 description 2
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 229910052635 ferrosilite Inorganic materials 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 150000002815 nickel Chemical class 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- WWNBZGLDODTKEM-UHFFFAOYSA-N sulfanylidenenickel Chemical compound [Ni]=S WWNBZGLDODTKEM-UHFFFAOYSA-N 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
An electric furnace in direction connection with a rotary kiln includes a rotary kiln and an electric furnace, and is characterized in that the rotary kiln is directly connected with the electric furnace therebelow through a discharge pipe, i.e. the smoke pipe; and six electrodes in ring arrangement are arranged at the middle of the electric furnace. The electric furnace in direction connection with the rotary kiln can effectively reduce heat loss, improve the thermal efficiency and reducer efficiency, greatly lower the energy consumption, and simplify the production process, thereby achieving continuous production, saving apparatus investment and improving the ferronickel grade to above 20%. Compared with the soil sintering and submerged arc furnace method, the electric furnace in direction connection with the rotary kiln can reduce energy consumption by more than 70%, and can greatly reduce the emission of greenhouse gases. In addition, the electric furnace in direction connection with the rotary kiln has the advantages of simple operation and easy control.
Description
Technical field
The utility model belongs to metallurgical with the direct-connected electric furnace of electric furnace, particularly rotary kiln.
Background technology
Along with science and technology development, metallic nickel has worldwide obtained application more and more widely.Because the nickel sulfide ore resource is deficient day by day, the expansion of nickel output will be mainly derived from lateritic nickel ore.But since lateritic nickel ore can not ore dressing and nickel content low, energy consumption is very high in the process of pyrometallurgical smelting, causes high production cost.
To the garnierite in the lateritic nickel ore, adopt thermal process to handle mostly.For example existing RKEF (Rotary kilnelectric furnace, Chinese can be referred to as " rotary kiln non-direct-coupled type electric furnace ") method, be exactly earlier with rotary kiln to breeze drying, dehydration and roasting, transport to electric furnace again and produce ferronickel with the method for reduction melting, this method can realize higher production efficiency and nickel yield, the about 36000 degree/nickel per ton of ferronickel power consumption that it produces nickel per ton add 10 tons of consumption of coals, smelt power consumption 550 degree in dried ore deposit per ton; But exist problems such as long flow path, equipment complexity, the thermal efficiency be high inadequately, make this method also be difficult to generally be applied.
In China, ferroalloy works are the less producer of production scale particularly, is extensively adopting native sintering deposit to add the mine heat furnace smelting method and is producing the nickel pig iron, and its power consumption reaches 88000 degree/nickel per ton, adds 19 tons of coke consumptions.Power consumption 1350 degree in dried ore deposit per ton.
Problem under solution energy consumption and production cost are in has not become the technical problem of the task of top priority.
Summary of the invention
The technical problems to be solved in the utility model provides a kind of effective minimizing heat loss, cuts down the consumption of energy, increases substantially heat utilization efficiency, simplifies production procedure, reduce and build and the direct-connected electric furnace of rotary kiln of production cost.
The utility model solves the problems of the technologies described above with following technical scheme:
Rotary kiln is held concurrently by tremie pipe, and smoke pipe is direct to be connected with the electric furnace that is positioned at its below, and 6 electrodes lining up a circle are arranged in the middle of electric furnace.
The direct-connected electric furnace of rotary kiln of the present utility model has effectively reduced heat loss, has improved the thermal efficiency and reducing agent efficient, has reduced energy consumption significantly, simplified production procedure, realized serialization production, saved equipment investment, the ferronickel grade can reach more than 20%.Produce the about 30000 degree/nickel per ton of ferronickel power consumption of nickel per ton; Add 10 tons of coals.Below power consumption 500 degree in dried ore deposit per ton.Add the ore deposit heat furnace method with native sintering deposit and compare, energy underconsumption 30% has reduced the greenhouse gas purging in a large number.And simple to operate, control easily.
Description of drawings
Fig. 1 is the structural representation of the direct-connected electric furnace of the utility model rotary kiln.
The specific embodiment
Rotary kiln 7 is positioned at the top of electric furnace 10, has the tremie pipe smoke pipe 5 of holding concurrently directly to connect between rotary kiln and electric furnace 10, and 6 electrodes 4 lining up a circle are arranged in the centre of electric furnace 10, forms the bigger utmost point heart of diameter by 6 electrodes and justifies.Electric furnace has conventional tapping hole 9 and slag notch 2.On the tube wall of the smoke pipe of holding concurrently over against the tremie pipe of kiln tail discharging opening, the igniter 6 that passes tube wall is arranged.
When the direct-connected electric furnace of the utility model rotary kiln was worked, furnace charge lateritic nickel ore powder in the rotary kiln and coal dust were shifted to the stove tail from burner lentamente with the rotary kiln rotation; Breeze promptly begins reduction at the position of about 200 ℃ of burners, but since the reducing property of nickel to get well than iron, when furnace charge 8 when burner moves to the stove tail, the stove tail temperature about 900 ℃ is with Ni-based reduction in the breeze.As long as when prepared furnace charge, control coal dust quantity in the furnace charge well, be not enough to reduce more iron after making carbon monoxide in the rotary kiln with the nickel reduction, roasting material most of nickel when going out rotary kiln is reduced, but still have a large amount of iron oxide.The rotating speed of control rotary kiln just can be controlled charging rate, roasting temperature of charge and nickel oxide reduction degree.
After roasting material after the prereduction is come out of the stove from the stove tail of rotary kiln, hold concurrently in the utmost point heart circle that molten bath central authorities that smoke pipe 5 directly falls into electric furnace 10 surround by electrode by tremie pipe, because of utmost point heart diameter of a circle bigger, can hold more roasting material, the connection lead above the electrode also can not produce the position with the rotary kiln baiting pipe and conflict.In utmost point heart circle, the roasting material temperature promotes and finishes metal molten and slag making rapidly, and the nickel pig iron 1 of generation accumulates in the bottom, molten bath, 3 of slags float on the nickel pig iron above.
Meanwhile, high temperature that is produced by electric arc in electric furnace and carbon monoxide and the dust kicked up also upwards flow and directly enter rotary kiln by the tremie pipe smoke pipe 5 of holding concurrently together with heat, temperature and reducing atmosphere in the rotary kiln have been improved, participate in the reduction reaction in the rotary kiln, together with the roasting material stove center that falls to wiring back, energy and material all are fully utilized the part dust behind the rotary kiln internal reaction.
In order to guarantee nickel element preferentially reduction under carbon monoxide atmosphere, ore be gone into the kiln granularity and be controlled at below 10 millimeters, and and the abundant mixing of coal dust, to guarantee the nickel oxide in the ore and the reaction chance and the activity of carbon monoxide.
Use the direct-connected electric furnace of rotary kiln of the present utility model, have the residual carbon, the electrode that in rotary kiln, do not have burning-out when falling into electric furnace and when discharge, discharge a spot of carbon that burns and, so in smelting process, need not add reducing agent to electric furnace again owing to the roasting material; The roasting material temperature rises rapidly in the high temperature discharge district that six electrodes surrounds, finishing the metallization of slag making and nickel rapidly smelts, nickel enters the liquid metal phase with the form of ferronickel, part iron is stayed in the slag with the form of iron oxide or ferrosilite, not only improved productivity ratio, the rate of recovery of nickel can reach 93%, and by the selective reduction of this nickel the grade of dilval is improved.
Compare with the RKEF method, use the technology of rotary kiln electric furnace in direct connection of the present utility model, numerous and diverse roasting material heat insulation tank, the roasting material Hoisting System of the equipment that both saved, distribute charging system etc., saved again huge flue gas cooling and purifying system, not only effectively reduce construction investment and operating cost, improve by a larger margin hot utilization rate, had obvious economic benefit and social benefit.
Rotary kiln electric furnace in direct connection of the present utility model also extends to the rich manganese slag of efficient smelting or smelts carbon containing less than in 2% the mid-carbon fe-mn field.
Claims (1)
1. the direct-connected electric furnace of rotary kiln has rotary kiln and electric furnace, and smoke pipe is direct to be connected with the electric furnace that is positioned at its below to it is characterized in that holding concurrently rotary kiln by tremie pipe, and 6 electrodes lining up a circle are arranged in the middle of electric furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201647649U CN201514116U (en) | 2009-10-27 | 2009-10-27 | Electric furnace in direct connection with rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201647649U CN201514116U (en) | 2009-10-27 | 2009-10-27 | Electric furnace in direct connection with rotary kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201514116U true CN201514116U (en) | 2010-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201647649U Expired - Lifetime CN201514116U (en) | 2009-10-27 | 2009-10-27 | Electric furnace in direct connection with rotary kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201514116U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102586603A (en) * | 2012-03-21 | 2012-07-18 | 马占玉 | Method for utilizing arc furnace powder |
| CN102893113A (en) * | 2010-07-12 | 2013-01-23 | 住友重机械工业株式会社 | Rotary kiln and metal recovery method |
| CN103602813A (en) * | 2013-11-29 | 2014-02-26 | 四川省冶金设计研究院 | Elevated short-process energy-saving novel RKEF (Rotary Kiln Electric Furnace) ferro-nickel alloy production process and equipment |
| CN108660311A (en) * | 2018-08-10 | 2018-10-16 | 阳江翌川金属科技有限公司 | A kind of laterite reduction apparatus and production technology |
| CN114264156A (en) * | 2021-12-28 | 2022-04-01 | 扬州市华翔有色金属有限公司 | Smelting furnace that work efficiency is high |
-
2009
- 2009-10-27 CN CN2009201647649U patent/CN201514116U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102893113A (en) * | 2010-07-12 | 2013-01-23 | 住友重机械工业株式会社 | Rotary kiln and metal recovery method |
| CN102893113B (en) * | 2010-07-12 | 2015-06-17 | 住友重机械工业株式会社 | Rotary kiln and metal recovery method |
| CN102586603A (en) * | 2012-03-21 | 2012-07-18 | 马占玉 | Method for utilizing arc furnace powder |
| CN103602813A (en) * | 2013-11-29 | 2014-02-26 | 四川省冶金设计研究院 | Elevated short-process energy-saving novel RKEF (Rotary Kiln Electric Furnace) ferro-nickel alloy production process and equipment |
| CN103602813B (en) * | 2013-11-29 | 2016-07-06 | 四川省冶金设计研究院 | The energy-conservation RKEF dilval production equipment and process of overhead short route |
| CN108660311A (en) * | 2018-08-10 | 2018-10-16 | 阳江翌川金属科技有限公司 | A kind of laterite reduction apparatus and production technology |
| CN108660311B (en) * | 2018-08-10 | 2023-10-24 | 阳江翌川金属科技有限公司 | Laterite ore reduction equipment and production process |
| CN114264156A (en) * | 2021-12-28 | 2022-04-01 | 扬州市华翔有色金属有限公司 | Smelting furnace that work efficiency is high |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100623 |
|
| CX01 | Expiry of patent term |