CN102010985A - Method for smelting ferronickel by laterite-nickel ore added by circular sintering machine-submerged arc furnace - Google Patents
Method for smelting ferronickel by laterite-nickel ore added by circular sintering machine-submerged arc furnace Download PDFInfo
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- CN102010985A CN102010985A CN 201010607786 CN201010607786A CN102010985A CN 102010985 A CN102010985 A CN 102010985A CN 201010607786 CN201010607786 CN 201010607786 CN 201010607786 A CN201010607786 A CN 201010607786A CN 102010985 A CN102010985 A CN 102010985A
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- ferronickel
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Abstract
The invention discloses a method for smelting ferronickel by a laterite-nickel ore added by a circular sintering machine-a submerged arc furnace, which is easy to implement, and has the advantages of low energy consumption, low production cost, short investment payoff period and the like. The method comprises the following steps: (1) adding a drying agent in the laterite-nickel ore containing adsorptive water for drying, and delivering the qualified laterite-nickel ore to a batching room, namely a laterite-nickel ore bin, for batching; (2) delivering the mixed material after batching to a mixer, adding water, uniformly mixing and pelletizing, and delivering the mixture to the circular sintering machine for sintering; (3) feeding the sintered sinter ore into a crusher from the machine tail for crushing, and thermally screening the sinter ore, and leading the thermal sinter ore with qualified granularity to the next operation; and (4) mixing the thermal sinter ore with qualified granularity with coke and lime stone according to the conventional proportion, and feeding the mixture into the submerged arc furnace for smelting, starting to fuse at the temperature of between 1,550 and 1,600 DEG C, filling the qualified molten ferronickel into an iron ladle through a tap hole, and pouring the molten ferronickel into a pig casting machine to be cast into a ferronickel briquettes, namely the finished product.
Description
Technical field
The present invention relates to a kind of method of utilizing circular machine-mine heat furnace smelting to become ferronickel.
Background technology
The red soil nickel ore smelting ferronickel just was widely adopted in these several years, mainly contained following several smelting process: one, blast furnace process: Ni=0.9～1.1%, Fe 〉=48% red soil nickel ore are suitable for the low ferronickel of producing nickeliferous 1.5-1.9%; Ni=1.5～1.7%, Fe 〉=20% red soil nickel ore are applicable to the low ferronickel of blast furnace production 3～6%; Two, ore deposit heat furnace method: Ni 〉=1.8%, Fe 〉=15% are applicable to the middle ferronickel of nickeliferous 〉=10% of the hot stove production in ore deposit; Three, direct-reduction process: utilize direct production ferronickels such as tunnel furnace, rotary kiln, shaft furnace, rotary hearth furnace.Direct-reduction process also need be advanced converter and carry out refining because of impure more.Ferronickel is hanged down in blast furnace process production, demand is little, and the middle ferronickel of ore deposit heat furnace method production can be the needed comparatively ideal ferronickel of stainless steel smelting with addition of entering the converter smelting stainless steel, but cost is higher always, and how to reduce cost is the target that manufacturing enterprise is pursued always.
It generally is earlier red soil nickel ore to be produced agglomerate now that the ore deposit heat furnace method is produced ferronickel, and cooling back batching is sent into the hot stove in ore deposit, and the high temperature that utilizes electrode to produce carries out fusion smelting and produces ferronickel.
With mine heat furnace smelting nickel-iron two kinds of technologies are arranged generally, a kind of be nickel minerals behind sintering on the sinter machine, smelt through cooling, broken, screening fed to boiler, China all is this kind technology, this technology is that stove is gone in cold ore deposit; After another kind was the nickel oxide ore roasting, hot ore deposit directly added in the hot stove in ore deposit and smelts, and can save a large amount of electric energy, and its weak point is that the rotary kiln investment is huge, and the assorted factory of Ukraine's Pabuk is exactly this technology.
Chinese patent application CN101418039 discloses a kind of red soil nickel ore direct method of reduction grain nickel iron in rotary kiln, finishes according to the following steps: at first add siccative in containing the red soil nickel ore of planar water, mix and dehydrate; Above-mentioned compound fragmentation, add reductive agent and grain nickel iron aggregating agent prepared therefrom then, send into after mixing and carry out reducing roasting in the rotary kiln; Through shrend cooling, fragmentation, ball milling, magnetic separation, just can obtain high-grade grain nickel iron alloy after the reducing roasting.The present invention produces simple, easy to operate, energy efficient, cost is low, the rate of recovery height of nickel, the grain nickel iron alloying pellet of producing can be directly as the high quality raw material of smelting stainless steel; Be applicable to various grades and dissimilar red soil nickel ores.But it exists following defective or deficiency: contaminate environment, and energy consumption is big, the production cost height, the quality instability is for postorder production has increased difficulty.
Summary of the invention
At above-mentioned prior art, the invention provides a kind of hot stove in circular machine-ore deposit that utilizes and add the method that red soil nickel ore is smelted into ferronickel, the present invention utilizes circular machine to produce the red soil nickel ore agglomerate, then heat sinter is directly sent in the hot stove in ore deposit and smelted the production ferronickel, thereby reach energy-saving and cost-reducing, the purpose that reduces cost.
The present invention is achieved by the following technical solutions:
A kind of method of utilizing circular machine that red soil nickel ore is smelted into ferronickel, step is as follows:
(1) at first in the red soil nickel ore that contains planar water, adds siccative and carry out drying, send granularity to proportioning room red soil nickel ore ore storage bin less than the qualified red soil nickel ore of 10mm then, prepare burden with Wingdale, hard coal etc. (conventional batching);
(2) compound after the above-mentioned batching is sent into mixing machine and add water, mixing, granulation, be delivered to circular machine then and carry out sintering;
(3) above-mentioned burned agglomerate is entered crusher at the tail place and carry out fragmentation, carry out the heat screening then, the heat sinter that release mesh 10-50mm is about 700 ℃ ± 10 ℃ carries out next-step operation, and undersized agglomerate less than the defective granularity of 10mm carries out sintering again;
(4) enter in the hot stove in ore deposit after the heat sinter of above-mentioned release mesh and coke, Wingdale are prepared burden by 66%: 27%: 7% conventional proportioning and smelt, 1550～1600 ℃ of beginning fusions, nickeliferous greater than 10% ferronickel water by the iron notch iron ladle of packing into, pour into then and cast the ferronickel piece in the pig-casting machine, promptly obtain finished product.The slag that fusion produces enters in the slag bath by cinder notch, transports by automobile.
Technical process of the present invention is: red soil nickel ore-drying-batching-mixing-circular machine-transfer roller-mine heat furnace smelting-cast iron-finished product.
Red soil nickel ore is sent proportioning room red soil nickel ore ore storage bin in the described step (1), prepares burden with Wingdale, hard coal etc., is the routine batching, and the present invention does not have improvement to this, does not repeat them here.
Heat sinter and coke, the Wingdale of release mesh carry out proportioning in the described step (4), are conventional proportioning, and the present invention does not have improvement to this, does not repeat them here.
In the practical application, according to the content difference of Ni in the red soil nickel ore, general requirement Ni 〉=1.8% by proportioning, obtains containing the qualified ferronickel of Ni 〉=10%.
The present invention has following beneficial effect: one, because of adopting advanced circular machine technology, agglomerate is sent into the hot stove in ore deposit, replace present native sintering or shaft furnace sintering, each several part leaks ash, the leakage dirt pits is controlled effectively, improve environment greatly, helped workman's work; Circular machine burns speculative investment than band and economizes about 40%; Two, the agglomerate of release mesh is sent into the hot stove in ore deposit, improved the ventilation property of the bed of material in the hot stove in ore deposit, help smelting energy efficient.What circular machine adopted is hot riddler's skill, directly will return batch mixing less than the agglomerate of 10mm, and sintering has again guaranteed to go into the granularity of the hot stove in ore deposit, has increased ventilation property; Three, adopt heat sinter directly to enter the hot furnaceman's skill in ore deposit, reduced electric energy widely,, save energy and reduce the cost and made huge contribution, for huge profit margin has been created in ferronickel production for saving cost.Four, avoid the required equipment of agglomerate cooling, or waited for the trouble of native agglomerate cooling back transportation, made full use of the energy.Though five, the present invention's initial investment is bigger than native sintering or shaft furnace sintering, but to save manyly than band burning, stepped start-stop system sinter machine, and running cost is well below the cold burned stove of domestic common use now, huge profit margin is arranged, help environmental protection, have technology and be easy to realize, consume energy low, production cost is low, the payback period such as lacks at advantage.
Embodiment
The present invention is further illustrated below in conjunction with embodiment.
1 one kinds of methods of utilizing circular machine red soil nickel ore to be smelted into ferronickel of embodiment: step is as follows:
(1) at first in the red soil nickel ore that contains planar water, adds siccative and carry out drying, send granularity to proportioning room red soil nickel ore ore storage bin less than the red soil nickel ore of the release mesh of 10mm then, prepare burden with Wingdale, hard coal etc.;
(2) compound after the above-mentioned batching is sent into mixing machine and add water, mixing, granulation, be delivered to circular machine then and carry out sintering;
(3) above-mentioned burned agglomerate is entered crusher at the tail place and carry out fragmentation, carry out the heat screening then, about about 700 ℃ heat sinter of release mesh 10-50mm carries out next-step operation, and the agglomerate of undersized defective granularity carries out sintering again;
(4) enter in the hot stove in ore deposit after the heat sinter of above-mentioned release mesh and coke, Wingdale are prepared burden by 66%: 27%: 7% conventional proportioning and smelt, 1550～1600 ℃ of beginning fusions, nickeliferous greater than 10% ferronickel water by the iron notch iron ladle of packing into, pour into then and cast the ferronickel piece in the pig-casting machine, promptly obtain finished product.The slag that fusion produces enters in the slag bath by cinder notch, transports by automobile.
Technical process of the present invention is: red soil nickel ore-drying-batching-mixing-circular machine-transfer roller-mine heat furnace smelting-cast iron-finished product.
Red soil nickel ore is sent proportioning room red soil nickel ore ore storage bin in the described step (1), prepares burden with Wingdale, hard coal etc., is the routine batching, and the present invention does not have improvement to this, does not repeat them here.
Heat sinter and coke, the Wingdale of release mesh carry out proportioning in the described step (4), are conventional proportioning, and the present invention does not have improvement to this, does not repeat them here.
In the practical application, according to the content difference of Ni in the red soil nickel ore, general requirement Ni 〉=1.8% by proportioning, obtains containing the qualified ferronickel of Ni 〉=10%.
The present invention compares with Chinese patent application CN101418039, and advantage is as follows: this process implementing is more reliable: the first, and Chinese patent application CN101418039 is applicable to the existing sintering of using; Ripe sintering process mainly contains that band burns, ring burns, three kinds of stepped start-stop system sintering, and it is big that band burns investment, is to save investment, reduces factory building height, and it is whole that China adopts basically is cold riddler's skills, gives the ore deposit hot stove in all granularity agglomerate like this, will influence ventilation property; What the stepped start-stop system sintering adopted is process for cooling on the machine, does not also have sieving technology, therefore inapplicable.The second, Chinese patent application CN101418039 says that hot ore deposit advances ore storage bin, about 700 ℃ of hot ore deposit temperature, and ore storage bin is difficult to bear, and the time has been grown yielding, the normal operation of equipment below the influence.The 3rd, from the investment aspect, ring burns all will be saved manyly than band burning, stepped start-stop system sintering.
Claims (5)
1. the hot stove in the circular machine-ore deposit method of adding the red soil nickel ore smelting ferronickel is characterized in that step is:
(1) at first in the red soil nickel ore that contains planar water, adds siccative and carry out drying, then the red soil nickel ore of release mesh is sent to proportioning room red soil nickel ore ore storage bin, prepare burden;
(2) compound after the above-mentioned batching is sent into mixing machine and add water, mixing, granulation, be delivered to circular machine then and carry out sintering;
(3) above-mentioned burned agglomerate is entered crusher at the tail place and carry out fragmentation, carry out the heat screening then, the agglomerate of release mesh carries out next-step operation, and the agglomerate of undersized defective granularity carries out sintering again;
(4) heat sinter of above-mentioned release mesh and coke, Wingdale carry out entering in the hot stove in ore deposit after the proportioning and smelt, 1550～1600 ℃ of beginning fusions, qualified ferronickel water is poured into then and is cast the ferronickel piece in the pig-casting machine by the iron notch iron ladle of packing into, promptly obtains finished product.
2. the method that the hot stove in a kind of circular machine-ore deposit according to claim 1 adds the red soil nickel ore smelting ferronickel, it is characterized in that: the siccative in the described step (1) is a unslaked lime.
3. the method that the hot stove in a kind of circular machine-ore deposit according to claim 1 adds the red soil nickel ore smelting ferronickel is characterized in that: the red soil nickel ore of release mesh is the red soil nickel ore of granularity less than 10mm in the described step (1).
4. the method that the hot stove in a kind of circular machine-ore deposit according to claim 1 adds the red soil nickel ore smelting ferronickel is characterized in that: the agglomerate of release mesh is meant 700 ℃ ± 10 ℃ the heat sinter of 10-50mm in the described step (3).
5. the hot stove in a kind of circular machine-ore deposit according to claim 1 adds the method for red soil nickel ore smelting ferronickel, it is characterized in that: qualified ferronickel water is meant nickeliferous greater than 10% ferronickel water in the described step (4).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010607786 CN102010985A (en) | 2010-12-27 | 2010-12-27 | Method for smelting ferronickel by laterite-nickel ore added by circular sintering machine-submerged arc furnace |
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| CN 201010607786 CN102010985A (en) | 2010-12-27 | 2010-12-27 | Method for smelting ferronickel by laterite-nickel ore added by circular sintering machine-submerged arc furnace |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102220484A (en) * | 2011-05-27 | 2011-10-19 | 广西盛隆冶金有限公司 | Application and method of laterite nickel ore for producing sinter |
| CN103526025A (en) * | 2013-10-22 | 2014-01-22 | 河南省西保冶材集团有限公司 | Iron alloy furnace burden production system |
| CN106088694A (en) * | 2016-06-08 | 2016-11-09 | 中冶南方工程技术有限公司 | Lateritic nickel ore raw material storage and lateritic nickel ore stock preparation system |
| CN106676261A (en) * | 2017-01-23 | 2017-05-17 | 宝钢德盛不锈钢有限公司 | Efficient uniform mixing process for laterite nickel ore |
-
2010
- 2010-12-27 CN CN 201010607786 patent/CN102010985A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 《铁合金》 20100430 贾艳桦等 探讨适合的镍铁生产工艺 , 第2期 2 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102220484A (en) * | 2011-05-27 | 2011-10-19 | 广西盛隆冶金有限公司 | Application and method of laterite nickel ore for producing sinter |
| CN102220484B (en) * | 2011-05-27 | 2012-10-03 | 广西盛隆冶金有限公司 | Application and method of laterite nickel ore for producing sinter |
| CN103526025A (en) * | 2013-10-22 | 2014-01-22 | 河南省西保冶材集团有限公司 | Iron alloy furnace burden production system |
| CN106088694A (en) * | 2016-06-08 | 2016-11-09 | 中冶南方工程技术有限公司 | Lateritic nickel ore raw material storage and lateritic nickel ore stock preparation system |
| CN106088694B (en) * | 2016-06-08 | 2018-05-08 | 中冶南方工程技术有限公司 | Lateritic nickel ore raw material storage and lateritic nickel ore stock preparation system |
| CN106676261A (en) * | 2017-01-23 | 2017-05-17 | 宝钢德盛不锈钢有限公司 | Efficient uniform mixing process for laterite nickel ore |
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Application publication date: 20110413 |