CN201779998U - Metallurgical direct current electric furnace device - Google Patents
Metallurgical direct current electric furnace device Download PDFInfo
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- CN201779998U CN201779998U CN2009202537059U CN200920253705U CN201779998U CN 201779998 U CN201779998 U CN 201779998U CN 2009202537059 U CN2009202537059 U CN 2009202537059U CN 200920253705 U CN200920253705 U CN 200920253705U CN 201779998 U CN201779998 U CN 201779998U
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- direct current
- current electric
- furnace
- electric furnace
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Abstract
The utility model discloses a metallurgical direct current electric furnace device, which relates to a metallurgical melting device, in particular to a device for producing ferronickel through melting by a direct current electric furnace. Electrodes provided by the direct current electric furnace at the furnace bottom adopt a series of integral cooled electric conducting blades, and are arranged below magnesia carbon bricks, and the space position for installing the electrodes at the furnace bottom is provided with a cooling air inlet and a cooling air outlet. The metallurgical direct current electric furnace device has low energy consumption (which is 5 to 10 percent lower than that of an alternating current electric furnace), low noise pollution, strong molten pool stirring and little impact on prime electric networks, and is simple to operate.
Description
Technical field
The utility model relates to a kind of metallurgical smelting plant, and particularly the device of ferronickel is produced in the direct current furnace melting.
Background technology
Nickel (Ni) is a kind of rare precious metal, and its purposes is very extensive: space flight, aviation, navigation, national defence, scientific research, industry, agricultural, medical treatment, automobile, iron and steel and all trades and professions such as civilian all lack bound it.Nickel-containing mineral is more and more rare on the earth's crust, and grade is also more and more lower.It is very big to extract difficulty from low-grade lateritic nickel ore, and key is a production cost, thereby to reduce production costs be exactly the key point of extracting nickel from lateritic nickel ore.
What the device of conventional electro-smelting production ferronickel adopted is ac electric arc furnace, though the technology of this device is ripe, the electrical loss of ac electric arc furnace is bigger, must install power compensating device additional in order to improve power factor, has caused structure complicated, and cost is higher; What ac electric arc furnace adopted is three electrodes, and the electrode cost has occupied the very big proportion of electric furnace totle drilling cost, consumption of electrode is made up of end wear, lateral oxidation and fracture three parts, this three is directly proportional with the electrode radical again, so ac electric arc furnace will inevitably increase the cost that extracts nickel from lateritic nickel ore; In the ac electric arc furnace kind, the flowing of molten slag layer will be subjected to electromagnetic force and to produce the part acting in opposition of circulation and weaken, and it is mobile that iron liquid does not have substantially, is unfavorable for the carrying out of melting.
The utility model content
The purpose of this utility model provides a kind of metallurgical direct current furnace device, and it is simple in structure, the production cost of ferronickel significantly can be reduced, and energy consumption declines to a great extent, and minimum is reduced in environmental pollution.
Solving the technical scheme that technical problem of the present utility model takes is: the electrode of furnace bottom setting adopts the blade of the monolithic conductive of some coolings, and is installed in the below of magnesia carbon brick.The air-cooled monolithic conductive formula of the vane type of this device hearth electrode has simple in structure, reliable operation, and whole furnace bottom has good CURRENT DISTRIBUTION, blade guaranteed magnesia carbon brick do not burn till before electric conductivity when very poor, electric furnace can normally start.The integral sintered performance of magnesia carbon brick has guaranteed the functional reliability at the bottom of the open hearth.
The locus that air-cooled overall electrode is installed at described furnace bottom is provided with cooling air import and cooling air outlet, and the hot blast that the cooling back produces can be sent into and supply the CO burning in the stove, thereby improves temperature in the stove, reduces power consumption.
The beneficial effects of the utility model are:
(1) energy consumption is low, and direct current furnace will hang down 5～10% than ac electric arc furnace melting unit power consumption, and reason is that direct current furnace power factor under the situation that does not add power compensating device can reach 0.94～0.96.Heavy current circuit exchanges stove to be reduced with additional electrical loss ratio in the stove member, and the heat loss of having only an electrode and controlling device etc. reduces, and export license significantly reduces.
(2) consumption of electrode is low, and consumption of electrode is made up of end wear, lateral oxidation and fracture three parts, and this three is directly proportional with the electrode radical, so lack about half than the ac electric arc furnace consumption of electrode with three electrodes with the direct current furnace of an electrode.And the electrode cost accounts for about 6.5% of totle drilling cost.
(3) melting of favourable lateritic nickel ore, many slags melting that lateritic nickel ore is such, the fusion that mainly is lateritic nickel ore are that the liquid-liquid phase reaction mass transfer (heat transfer) between slag-iron is controlled link, so the molten bath stirring is the important means of intensified smelting.At ac electric arc furnace, though there is the molten slag layer that thermograde causes to flow, is subjected to electromagnetic force and produces the part acting in opposition of circulation and weaken, iron liquid does not have mobile substantially; Direct current furnace is the large-sized DC electric furnace particularly, and it hands over fast plasma jet will make molten slag layer produce the forced convertion campaign, and direct current has the metal bath stirring action that interchange is not had again simultaneously.
(4) electrode life is long, the vane type air cooled bottom electrode of electric furnace have conduction well, long characteristics of life-span, and the secondary wind that the hot blast that produces of furnace bottom cooling can be used as gas-fired uses, and can save energy.
Description of drawings
Fig. 1 is a structure chart of the present utility model.
Insulating barrier 1, hearth electrode 2, iron sheet blade 3, cooling air import 4, cooling air outlet 5, magnesia carbon brick 6, bath 7, electrode 8, binding post 9, clay brick 10.
The specific embodiment
Referring to Fig. 1, this direct current furnace one electrode 8 is loaded on furnace roof, extends in the bath 7, and adopts the iron sheet blade 3 of a series of integral body at the hearth electrode 2 that furnace bottom is provided with, and be installed in the below of magnesia carbon brick 6, makes whole furnace bottom that good CURRENT DISTRIBUTION be arranged.The locus that hearth electrode 2 is installed at furnace bottom is provided with cooling air import 4 and cooling air outlet 5, the hot blast that cools off the back generation is sent into supplied the CO burning in the stove, with temperature in the raising stove, and lowers power consumption.
Claims (2)
1. metallurgical direct current furnace device, it is characterized in that: the electrode of furnace bottom setting adopts the blade of the monolithic conductive of some coolings, and is installed in the below of magnesia carbon brick.
2. by the described metallurgical direct current furnace device of claim 1, it is characterized in that: be provided with cooling air import and cooling air outlet in the locus of furnace bottom installing electrodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202537059U CN201779998U (en) | 2009-11-16 | 2009-11-16 | Metallurgical direct current electric furnace device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202537059U CN201779998U (en) | 2009-11-16 | 2009-11-16 | Metallurgical direct current electric furnace device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201779998U true CN201779998U (en) | 2011-03-30 |
Family
ID=43793209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202537059U Expired - Lifetime CN201779998U (en) | 2009-11-16 | 2009-11-16 | Metallurgical direct current electric furnace device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201779998U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110405714A (en) * | 2019-08-21 | 2019-11-05 | 云南锡业股份有限公司铜业分公司 | A kind of self-baking electrode operation insulated platform |
| CN111263821A (en) * | 2017-10-23 | 2020-06-09 | 日本制铁株式会社 | Electric furnace and method for melting and reducing iron oxide-containing raw material |
-
2009
- 2009-11-16 CN CN2009202537059U patent/CN201779998U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111263821A (en) * | 2017-10-23 | 2020-06-09 | 日本制铁株式会社 | Electric furnace and method for melting and reducing iron oxide-containing raw material |
| CN111263821B (en) * | 2017-10-23 | 2022-01-11 | 日本制铁株式会社 | Electric furnace and method for melting and reducing iron oxide-containing raw material |
| CN110405714A (en) * | 2019-08-21 | 2019-11-05 | 云南锡业股份有限公司铜业分公司 | A kind of self-baking electrode operation insulated platform |
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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: 20110330 |
|
| CX01 | Expiry of patent term |