CN203403141U - Device for preparing ferronickel roasted ores by means of nickel laterite ores - Google Patents
Device for preparing ferronickel roasted ores by means of nickel laterite ores Download PDFInfo
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- CN203403141U CN203403141U CN201320501729.8U CN201320501729U CN203403141U CN 203403141 U CN203403141 U CN 203403141U CN 201320501729 U CN201320501729 U CN 201320501729U CN 203403141 U CN203403141 U CN 203403141U
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- cyclone preheater
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Abstract
The utility model discloses a device for preparing ferronickel roasted ores by means of nickel laterite ores. The device comprises a hopper type lifting machine, an air inclined groove, an inclined groove fan, a rotary discharging device, a gate valve, a rotary kiln, a water cooling blending groove, a burner, a hot wind mixing chamber, a high-temperature fan, a cyclone dust collector, a bag type dust collector, a chain type conveying machine, a burner and a prereduction system. According to the device for preparing the ferronickel roasted ores by means of the nickel laterite ores, the heat transfer area of ore powder is large, each ore grain can evenly and completely complete the chemical reaction, the reaction time is short, and the utilization rate of the nickel laterite ores is high.
Description
Technical field
The utility model relates to a kind of device of preparing ferronickel roasted ore, relates in particular to a kind of device that utilizes red soil nickel ore to prepare ferronickel roasted ore.
Background technology
The roasted ore of ferronickel eutectic phase is the important intermediates of choosing nickel minerals, and it is the raw material of manufacturing the important nickeliferous products such as stainless steel that ferronickel roasted ore obtains high-grade nickel ore concentrate after magnetic separation.
The production method that tradition is prepared ferronickel product has following two kinds:
(1) rotary kiln for directly reducing method: Gu nickel minerals → oven dry → fragmentation → allocate into Multi-stage slag iron separation → particulate ferronickel → electric furnace melting down → refining desulfuration → ferronickels such as coke, the dehydration of flux mixing briquetting → preheating → rotary kiln, reduction → melt slag iron mixture → shrend → grind → jigging, high intensity magnetic separation.
The emphasis of the method is rotary kiln dehydration, reduction, the type of furnace used is generally rotary kiln, and maturing temperature is generally at 1300 ℃～1400 ℃, although in pyrometallurgical smelting ferronickel is produced at present, for equipment is the simplest, generate the production technique that metal flow process is the shortest, comprehensive energy consumption is minimum, its coke and flux briquetting enter after rotary kiln, the area that cause contacts with hot gas is limited, heat utilization ratio is low, and in rotary kiln, firing time is very long, and heat utilization efficiency is lower;
(2) blast furnace process: nickel minerals → dehydration, sintering, agglomeration → allocate coke into, Si, C, P, S → ferronickel fall in flux → blast-furnace smelting → thick ferronickel → refining.
The method is because country limits 400m
3the use of following small furnace, therefore adopts the low Ni ferronickel of large capacity blast-furnace smelting still immature.
Utility model content
The technical problems to be solved in the utility model is to overcome the deficiencies in the prior art, provides the red soil nickel ore that utilizes that a kind of resource utilization is high, the reaction times is short, volume of equipment utilization ratio is high, production environment is clean to prepare the device of ferronickel roasted ore.
For solving the problems of the technologies described above, the technical scheme the utility model proposes is:
Utilize red soil nickel ore to prepare a device for ferronickel roasted ore, comprise chapelet, air flume, skewed slot blower fan, rotary feeder, slide valve, rotary kiln, water-cooled steel basin, burner, hot blast wind mixed chamber, high-temperature blower, tornado dust collector, sack cleaner, chain conveyor, burner, described chapelet is connected with air flume by blanking scraper-trough conveyer, described skewed slot blower fan is connected with air flume by air-supply airduct, described air flume is connected with rotary feeder by blanking scraper-trough conveyer, described rotary feeder is connected with slide valve by blanking scraper-trough conveyer, described rotary kiln is fixed on a framework by tightness system and water-cooled steel basin, described burner stretches in rotary kiln after by suspension bracket, hot blast wind mixed chamber is fixed in described framework, described burner is directly fixed in described hot blast wind mixed chamber, described high-temperature blower connects tornado dust collector by air outlet tube, described tornado dust collector are by air outlet tube connecting bag dust-precipitator, described tornado dust collector and bag collector pass through blanking chute sub-connection to described chain conveyor, also comprise prereduction system, described prereduction system comprises bitubular one-level cyclone preheater, secondary cyclone preheater, three grades of cyclone preheaters, Category Four cyclone preheater, five-stage cyclone preheater, Reaktionsofen, the blast inlet of described bitubular one-level cyclone preheater connects the air outlet tube of secondary cyclone preheater, the blast inlet of described secondary cyclone preheater connects the air outlet tube of three grades of cyclone preheaters, the blast inlet of described three grades of cyclone preheaters connects the air outlet tube of Category Four cyclone preheater, the blast inlet of described Category Four cyclone preheater connects the air outlet tube of five-stage cyclone preheater, the air outlet tube ligation stove of described five-stage cyclone preheater.
In said apparatus, preferably, the tremie pipe of described bitubular one-level cyclone preheater connects the air outlet tube of three grades of cyclone preheaters, the tremie pipe of described secondary cyclone preheater connects the air outlet tube of Category Four cyclone preheater, the tremie pipe of described three grades of cyclone preheaters connects the air outlet tube of five-stage cyclone preheater, the tremie pipe ligation stove of described Category Four cyclone preheater, the air outlet tube of described secondary cyclone preheater connects the tremie pipe of rotary feeder.
In said apparatus, preferably, described Reaktionsofen is connected with rotary kiln by tightness system, and described hot blast wind mixed chamber is connected with Reaktionsofen by airduct, and the air outlet tube of described bitubular one-level cyclone preheater connects high-temperature blower.
Compared with prior art, the utility model has the advantage of:
1, device provided by the utility model, it reduces the residence time of material in rotary kiln by the prereduction system increasing, improve contact area and the reactive behavior of red soil nickel ore pulverulent material and reduction heat gas, make material abundant and the generation heat exchange of reductibility hot gas and reduction reaction in prereduction system, this reaction times only needs tens seconds, thereby reduced the time of material pre-thermal reduction in rotary kiln greatly, and the chemical reaction of raw material and the completeness of combustion reactions have been improved, improved the thermal technology state of whole rotary system, reduced the hear rate of burning till of whole device, improved the reduction ratio of material,
2, device provided by the utility model, its material that enters prereduction system requires as pulverulent material, granularity 0.075mm ~ 1.0mm, therefore material enters the distribution that can be uniformly dispersed as early as possible after system, reach good gas-solid contact state, material is increased in fluidization in prereduction system, with the coefficient of heat transfer of gas be independent the more than 600 times of the rotary kiln coefficient of heat transfer, the heat transfer efficiency of whole device increases greatly;
3, device provided by the utility model, its material first carries out fully heat exchange and the reaction of de-crystal water in cyclone preheater, and after arriving Reaktionsofen, in Reaktionsofen, air-flow forms the state that spurts, guarantee has rational temperature field in Reaktionsofen simultaneously, is beneficial to material and gas and carries out reduction reaction.
Accompanying drawing explanation
Fig. 1 is the device schematic diagram of preparing ferronickel roasted ore in the utility model embodiment;
Reference numeral:
01-chapelet; 02-air flume; 03-skewed slot blower fan; 04-rotary feeder; 05-slide valve; 06-bitubular one-level cyclone preheater; 07-secondary cyclone preheater; Tri-grades of cyclone preheaters of 08-; 09-Category Four cyclone preheater; 10-five-stage cyclone preheater; 11-Reaktionsofen; 12-rotary kiln; 13-water-cooled steel basin; 14-burner; 15-hot blast wind mixed chamber; 16-high-temperature blower; 17-tornado dust collector; 18-sack cleaner; 19-chain conveyor; 20-burner.
Embodiment
Below in conjunction with Figure of description and specific embodiment, the utility model is further described.
Embodiment 1: as shown in Figure 1, the utility model provides a kind of device that utilizes red soil nickel ore to prepare ferronickel roasted ore, comprises chapelet 01, air flume 02, skewed slot blower fan 03, rotary feeder 04, slide valve 05, rotary kiln 12, water-cooled steel basin 13, burner 14, hot blast wind mixed chamber 15, high-temperature blower 16, tornado dust collector 17, sack cleaner 18, chain conveyor 19, burner 20, described chapelet 01 is connected with air flume 02 by blanking scraper-trough conveyer, skewed slot blower fan 03 is connected with air flume 02 by air-supply airduct, air flume 02 is connected with rotary feeder 04 by blanking scraper-trough conveyer, rotary feeder 04 is connected with slide valve 05 by blanking scraper-trough conveyer, rotary kiln 12 is fixed on a framework by tightness system and water-cooled steel basin 13, burner 14 is by stretching into after suspension bracket in rotary kiln 12, hot blast wind mixed chamber 15 is fixed in described framework, burner 20 is directly fixed in hot blast wind mixed chamber 15, high-temperature blower 16 connects tornado dust collector 17 by air outlet tube, tornado dust collector 17 are by air outlet tube connecting bag dust-precipitator 18, tornado dust collector 17 and bag collector 18 pass through blanking chute sub-connection to chain conveyor 19, also comprise prereduction system, described prereduction system comprises bitubular one-level cyclone preheater 06, secondary cyclone preheater 07, three grades of cyclone preheaters 08, Category Four cyclone preheater 09, five-stage cyclone preheater 10, Reaktionsofen 11, the blast inlet of described bitubular one-level cyclone preheater 06 connects the air outlet tube of secondary cyclone preheater 07, the blast inlet of described secondary cyclone preheater 07 connects the air outlet tube of three grades of cyclone preheaters 08, the blast inlet of described three grades of cyclone preheaters 08 connects the air outlet tube of Category Four cyclone preheater 09, the blast inlet of described Category Four cyclone preheater 09 connects the air outlet tube of five-stage cyclone preheater 10, the air outlet tube ligation stove 11 of described five-stage cyclone preheater 10, the tremie pipe of described bitubular one-level cyclone preheater 06 connects the air outlet tube of three grades of cyclone preheaters 08, the tremie pipe of secondary cyclone preheater 07 connects the air outlet tube of Category Four cyclone preheater 09, the tremie pipe of three grades of cyclone preheaters 08 connects the air outlet tube of five-stage cyclone preheater 10, the tremie pipe ligation stove 11 of Category Four cyclone preheater 09, the air outlet tube of described secondary cyclone preheater 07 connects the tremie pipe of rotary feeder 04, described Reaktionsofen 11 is connected with rotary kiln 12 by tightness system, and hot blast wind mixed chamber 15 is connected with Reaktionsofen 11 by airduct, and the air outlet tube of bitubular one-level cyclone preheater 06 connects high-temperature blower 16.
Embodiment 2: as shown in Figure 1, the utility model provides a kind of method of utilizing red soil nickel ore to prepare ferronickel roasted ore, comprises the following steps:
(1) grind: red soil nickel ore fine grinding is made to breeze and after metering, send into chapelet 01, particle fineness, between 0.075mm ~ 1.0mm, is dried mineral in process of lapping simultaneously, makes the water content of breeze be less than 3wt%.
(2) pre-thermal reduction: material is introduced into chapelet 01, by blanking scraper-trough conveyer, entering air flume 02(skewed slot blower fan 03 again blows to air flume 02 by air-supply airduct, by the air distribution plate in air flume 02, material is sent), then by blanking scraper-trough conveyer, be connected with rotary feeder 04 and be delivered to the bitubular one-level cyclone preheater 06 entering in prereduction system, secondary cyclone preheater 07, three grades of cyclone preheaters 08, in Category Four cyclone preheater 09 and five- stage cyclone preheater 10, 05 lock wind effect of rotary feeder 04 and slide valve, with wherein from hot blast wind mixed chamber 16 hot flue gas out, carry out countercurrent flow, between each preheater and Reaktionsofen, by airduct and tremie pipe, connect, in warm, the hot flue gas that continues to pass into makes breeze be suspended state, and hot flue gas is derived from the gas of follow-up rotary kiln 12 high-temperature roastings and calcination process generation, wherein, temperature in bitubular one-level cyclone preheater 06 is controlled at 300 ℃～400 ℃, temperature in secondary cyclone preheater 07 is 400 ℃～500 ℃, temperature in three grades of cyclone preheaters 08 is 500 ℃～600 ℃, temperature in Category Four cyclone preheater 09 is 600 ℃～700 ℃, and the temperature in five-stage cyclone preheater 10 is 700 ℃～750 ℃, and warm adopts Pyatyi preheating, required time is 40s～50s, and after preheating, the temperature of breeze reaches 650 ℃～750 ℃, breeze after preheating enters in Reaktionsofen 11 and carries out reduction reaction, and temperature of reaction is 850 ℃ ~ 900 ℃, and the reaction times is 8s ~ 10s, react required high-temperature flue gas and come Self-air-heating wind mixed chamber 15, in hot blast wind mixed chamber, is furnished with burner 20, with coal, coal gas, Sweet natural gas or oil as fuel, for prereduction system provides most heat, a mixed gas part in hot blast wind mixed chamber 16 is from fresh air, and a part is from the tail gas of warm discharge and the tertiary air of rotary kiln head-shield.Above-mentioned high-temperature flue gas is week reduction, wherein contains the CO of 1%～5% volume fraction.The tail gas discharging in warm (containing a small amount of breeze) is transported in tornado dust collector 17 by high-temperature blower 16 through one-level cyclone preheater 06, at the gas after sack cleaner 18 dedustings, be divided into two portions, a part can be carried out grinding material to milling plant, and a part enters in hot blast wind mixed chamber 15 as preheating gas; After tornado dust collector 17 and sack cleaner 18 dedustings, isolated a small amount of breeze can be further delivered in raw material storage storehouse and be reentered in prereduction system by chain conveyor 19 circulations.
(3) calcining: the breeze after the pre-thermal reduction of Reaktionsofen 11, temperature is at 850 ℃ ~ 900 ℃, enter in rotary kiln 12, the head of rotary kiln 12 is equipped with burner 14(burner 14 and by support, is fixed on the kiln hood part of rotary kiln 12), fuel is coal, coal gas, Sweet natural gas or oil, and the temperature that produces high-temperature flue gas is about 1000 ℃ ~ 1300 ℃, makes mineral further reaction in rotary kiln 12, the roasted ore that forms nickel-contained pig iron, the whole reaction times is about 30min ~ 60min.
(4) cooling, separated: the breeze after high-temperature calcination forms bulk and enters in water-cooled steel basin 13, stir 10min～30min, obtain temperature and be the ferronickel roasted ore ore pulp of 60 ℃～80 ℃, obtain described ferronickel roasted ore; Ferronickel roasted ore ore pulp carries out solid-liquid separation again, and grinding obtains the nickel ore concentrate needing after the techniques such as magnetic separation.
In the preparation method of the present embodiment, by carrying out the rate of recovery of Fe and the rate of recovery measuring of Ni, (the normal rate of recovery of Fe is 90.48%, and the rate of recovery that reaches as high as 92.3%, Ni normally can reach 90.2%, reach as high as 92.53%), in red soil nickel ore powder, the utilization ratio of ferronickel is up to 90%.
Institute it should be noted that, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement the technical solution of the utility model, and not departing from the spirit and scope of technical solutions of the utility model, it all should be encompassed in the middle of claim scope of the present utility model.
Claims (3)
1. utilize red soil nickel ore to prepare a device for ferronickel roasted ore, it is characterized in that: comprise chapelet, air flume, skewed slot blower fan, rotary feeder, slide valve, rotary kiln, water-cooled steel basin, burner, hot blast wind mixed chamber, high-temperature blower, tornado dust collector, sack cleaner, chain conveyor, burner, described chapelet is connected with air flume by blanking scraper-trough conveyer, described skewed slot blower fan is connected with air flume by air-supply airduct, described air flume is connected with rotary feeder by blanking scraper-trough conveyer, described rotary feeder is connected with slide valve by blanking scraper-trough conveyer, described rotary kiln is fixed on a framework by tightness system and water-cooled steel basin, described burner stretches in rotary kiln after by suspension bracket, hot blast wind mixed chamber is fixed in described framework, described burner is directly fixed in described hot blast wind mixed chamber, described high-temperature blower connects tornado dust collector by air outlet tube, described tornado dust collector are by air outlet tube connecting bag dust-precipitator, described tornado dust collector and bag collector pass through blanking chute sub-connection to described chain conveyor, also comprise prereduction system, described prereduction system comprises bitubular one-level cyclone preheater, secondary cyclone preheater, three grades of cyclone preheaters, Category Four cyclone preheater, five-stage cyclone preheater, Reaktionsofen, the blast inlet of described bitubular one-level cyclone preheater connects the air outlet tube of secondary cyclone preheater, the blast inlet of described secondary cyclone preheater connects the air outlet tube of three grades of cyclone preheaters, the blast inlet of described three grades of cyclone preheaters connects the air outlet tube of Category Four cyclone preheater, the blast inlet of described Category Four cyclone preheater connects the air outlet tube of five-stage cyclone preheater, the air outlet tube ligation stove of described five-stage cyclone preheater.
2. the device that utilizes red soil nickel ore to prepare ferronickel roasted ore according to claim 1, it is characterized in that: the tremie pipe of described bitubular one-level cyclone preheater connects the air outlet tube of three grades of cyclone preheaters, the tremie pipe of described secondary cyclone preheater connects the air outlet tube of Category Four cyclone preheater, the tremie pipe of described three grades of cyclone preheaters connects the air outlet tube of five-stage cyclone preheater, the tremie pipe ligation stove of described Category Four cyclone preheater, the air outlet tube of described secondary cyclone preheater connects the tremie pipe of rotary feeder.
3. the device that utilizes red soil nickel ore to prepare ferronickel roasted ore according to claim 1, it is characterized in that: described Reaktionsofen is connected with rotary kiln by tightness system, described hot blast wind mixed chamber is connected with Reaktionsofen by airduct, and the air outlet tube of described bitubular one-level cyclone preheater connects high-temperature blower.
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| CN201320501729.8U CN203403141U (en) | 2013-08-16 | 2013-08-16 | Device for preparing ferronickel roasted ores by means of nickel laterite ores |
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| CN201320501729.8U CN203403141U (en) | 2013-08-16 | 2013-08-16 | Device for preparing ferronickel roasted ores by means of nickel laterite ores |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103468930A (en) * | 2013-08-16 | 2013-12-25 | 武汉建筑材料工业设计研究院有限公司 | Method and device for preparing nickel iron roasted ore by utilizing lateritic nickel ore |
| CN104032058A (en) * | 2014-05-14 | 2014-09-10 | 章钦成 | Method for producing nickel-iron particles by using coal-based reducing agent to directly reduce laterite nickel ore |
-
2013
- 2013-08-16 CN CN201320501729.8U patent/CN203403141U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103468930A (en) * | 2013-08-16 | 2013-12-25 | 武汉建筑材料工业设计研究院有限公司 | Method and device for preparing nickel iron roasted ore by utilizing lateritic nickel ore |
| CN104032058A (en) * | 2014-05-14 | 2014-09-10 | 章钦成 | Method for producing nickel-iron particles by using coal-based reducing agent to directly reduce laterite nickel ore |
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Granted publication date: 20140122 Termination date: 20210816 |
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| CF01 | Termination of patent right due to non-payment of annual fee |