CN110144470A - Lateritic nickel ore rotary kiln restores-blows smelting flow process - Google Patents

Lateritic nickel ore rotary kiln restores-blows smelting flow process Download PDF

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CN110144470A
CN110144470A CN201910492256.1A CN201910492256A CN110144470A CN 110144470 A CN110144470 A CN 110144470A CN 201910492256 A CN201910492256 A CN 201910492256A CN 110144470 A CN110144470 A CN 110144470A
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rotary kiln
temperature
metal
nickel ore
restores
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CN110144470B (en
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李朝侠
黄河
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Huang He
Li Chaoxia
Luoyang Luohua Powder Engineering Special Refractory Co ltd
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    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B13/00Making spongy iron or liquid steel, by direct processes
    • C21B13/0006Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B13/00Making spongy iron or liquid steel, by direct processes
    • C21B13/006Starting from ores containing non ferrous metallic oxides
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B13/00Making spongy iron or liquid steel, by direct processes
    • C21B13/08Making spongy iron or liquid steel, by direct processes in rotary furnaces
    • C21B13/085Making spongy iron or liquid steel, by direct processes in rotary furnaces wherein iron or steel is obtained in a molten state
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B23/00Obtaining nickel or cobalt
    • C22B23/02Obtaining nickel or cobalt by dry processes
    • C22B23/023Obtaining nickel or cobalt by dry processes with formation of ferro-nickel or ferro-cobalt

Abstract

The present invention provides a kind of lateritic nickel ore rotary kiln and restores-blow smelting abbreviated system, use raw material for the natural red soil low grade nickel ore of nickeliferous 0.8~3%, iron content 15~30%, add carbonaceous material, it is mixed with raw material, in a rotary kiln, the drying of completion aqueous mixture material, boiling dehydration, low temperature water gas reduction, the reduction of medium temperature dry gas, high temperature restore by force, and whole process derived from high-temperature oxygen-enriched blowing and the separation of rotary kiln forward metal and clay is worked continuously;Wherein, cryogenic temperature is no more than 400 DEG C, and medium temperature temperature is no more than 700 DEG C, and the strong reduction temperature of high temperature is 1100 DEG C~1300 DEG C, and high temperature blowing temperature is 1300 DEG C~1600 DEG C.Present invention process is on a rotary kiln, it completes from mixing carbonaceous material into kiln, finally in the abbreviated system for carrying out high temperature smelting process to carbonaceous mixture material, what is finally obtained is the metal product of high quality, the high-temperature calcination clay product of high stability and high-purity smokeshade, product harmless.

Description

Lateritic nickel ore rotary kiln restores-blows smelting flow process
Technical field
The invention belongs to field of chemical metallurgical technology, and in particular to and a kind of lateritic nickel ore rotary kiln restores-and the smeltingization that blows is short Flow process.
Background technique
Nickel is a kind of silvery white non-ferrous metal, has many excellent physics and chemical property, high-melting-point (1453 DEG C), Qiang Ci Property, good catalytic, anticorrosive and easy plating.Just because of these excellent performances, nickel is widely used in production not Corrosion-resisting alloy steel in steel, petroleum, chemical industry and the machinery manufacturing industry of becoming rusty, the high-temperature alloy steel in aviation boat too field, magnetic electrician The industries such as alloy, catalyst and plating.With the fast development of the development in these fields, especially stainless steel industry, the need of nickel The amount of asking will further improve.It is mainly at present nickel sulfide ore and lateritic nickel ore for the nickel resources of development and utilization.
Lateritic nickel ore is the nickeliferous high-speed rail clayey mine of a kind of nickeliferous 1~3%, iron content 15~30% forsterite property It produces.Coal blending or coke powder are mixed in laterite, are decomposed by reduction and high-temperature fusion, can be extracted dilval.Dilval is raw Produce the ferroalloy raw material of stainless steel.In China, lateritic nickel ore resource shortage relies on import substantially.
The main purpose of laterite smelting chemical industry skill is the nickel extracted in laterite.
Existing lateritic nickel ore smelting technical process, is broadly divided into three kinds:
The first is using three steps of raw material drying+carbon containing mixed raw material time high temperature prereduction+material high-temperature fusion sedimentation The smelting chemical industry skill of progress, this smelting method are also referred to as " RKEF " method.It is ferronickel water that this smelting method, which finally obtains product, is remained The 80% clay slag of remaininging is also to need to carry out secondary treatment as " solid waste " of heavy metals exceeding standard.In " RKEF " method, until It is needed less with three metallurgical furnace kilns: two rotary kilns is respectively adopted in dry and material activating prereduction technique, in material High-temperature fusion sedimentation uses closed submerged electric furnace.
It is for second the molten bath converting process of two sections of smelting chemical industry skills: is blown using raw material drying+oxygen-enriched high temperature of carbonaceous mixture material Refining, after material melts, the sedimentation separation in lower portion of furnace body molten bath, final products are also ferronickel water, the weight of residue 80% or so The exceeded clay slag of metal, still belongs to " solid waste ", needs secondary treatment.In " molten bath converting process ", at least need to use Two metallurgical furnace kilns: using rotary kiln in raw material drying, uses oxygen enriched molten bath converting furnace in the blowing of material high temperature.
The third is an a kind of step smelting chemical industry skill: this technique uses fewer.Concrete technology setting are as follows: raw material drying+ Carbonaceous mixture material forms semi-molten state in high temperature rotary kiln, has broken the molecular structure of laterite, and ferronickel particle cluster occurs, Then material kiln discharge water quenching, material magneticly elects ferronickel by several roads are levigate after water quenching, and a step smelting chemical industry skill is followed by multiple tracks machine Tool processing mill choosing, production line elongate, and energy waste is big, and technological operation narrow scope is difficult to control, therefore this technique is difficult to promote. This technique is pioneering by Japanese big rivers and mountains iron company and implements, also known as " big rivers and mountains method ".
Rotary kiln in prior art laterite smelting chemical industry skill is often used as raw material drying apparatus, a part ignored or abandoned The purpose of synthetical recovery in lateritic materials, this technique setting is relatively easy, without what is retained in view of smelting chemical industry skill The harmless treatment of slag.And the clay component in laterite (dry mine) occupies 70% or more of raw ore ingredient, traditionally smelting chemical industry The purpose and implementation route of skill, operating procedure are arranged relatively easy.Rare earth composition extracts nickel by various smelting chemical industry skills Iron, the source of the dilval for stainless steel.Due to SiO in laterite2The content of equal nonmetallic ores is several times as much as the content of Fe, number The content of Ni is decupled, so during extracting ferronickel, if with short as far as possible production line and investment expense, with more Supernumerary segment about with more environmentally-friendly controllable process form, in laterite in extraction process, makes metal nickel-iron alloy completely from " red It is thoroughly removed in soil ", is to measure the whether scientific and reasonable sole criterion of smelting extraction process.It is indicated with the rate of recovery of ferronickel.If Nickel+iron comprehensive recovery is greater than 97%, then the metal oxide impurities content in remaining laterite metallurgical slag just reaches The ingredient standard of the nonmetallic clay of country, the high-quality building material that " remaining laterite metallurgical slag " can be used as after high-temperature calcination are complete Volume uses;Otherwise, the heavy metal component of residue ferronickel contained in residue makes residue become " solid waste " pollution environment, must also Secondary treatment must be carried out, it is costly.
Based on the above issues, research and development energy conservation and environmental protection, high-quality and high-efficiency, easily operated process and equipment are still needed to.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of metallurgical abbreviated system of lateritic nickel ore rotary kiln blowing, solution It certainly needs individually to carry out raw material dehydration operation in the prior art, the problem of more equipment or multi-step and product need secondary treatment.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
The present invention provides a kind of lateritic nickel ore rotary kilns to restore-blow smelting abbreviated system, uses raw material to be nickeliferous 0.8~3%, the natural red soil low grade nickel ore of iron content 15~30% adds carbonaceous material, mixes with raw material, turns round at one In kiln, the drying of aqueous mixture material, dehydration of boiling, low temperature water gas reduction, the reduction of medium temperature dry gas, high temperature are completed by force also Whole process derived from original, high-temperature oxygen-enriched blowing and the separation of rotary kiln forward metal and clay is worked continuously;Wherein, low temperature Temperature is no more than 400 DEG C, and medium temperature temperature is no more than 700 DEG C, and the strong reduction temperature of high temperature is 1100 DEG C~1300 DEG C, high temperature blowing temperature Degree is 1300 DEG C~1600 DEG C;Water content is 8%~30% in the mixed material, and phosphorus content is 10%~30%, sulfur content It is 0~20%.
Preferably, it is fed in a manner of continuous charging to feed end, in discharge end collection material in a manner of continuous discharge; Discharge end material is metal a fluid stream, metal liquid frit and metal liquid granule state;The clay isolated partly is melted in softening Bulk, metal liquid frit and metal liquid granule are softened ball clay package or entrainment, with different location, mutually it is interspersed mutually not The form of interference is in periodically discharge.
Preferably, the nonmetallic oxidation of the metal oxide microparticle and high-purity high-activity of the high-purity high-activity isolated Object particle is collected by the smoke collecting device that cylinder of rotary kiln port is arranged, and is periodically taken out.
Preferably, the mixed material is attached at rotary kiln inner surface in rotary kiln, helical rotational trajectory is carried out, along interior Surface scrolls advance is climbed to turn back again and is fallen, and operational process is agglomerated into metal to be independent metal a fluid stream and clay is shelled From formation rotary kiln front end rolling type metal molten bath and metal a fluid stream make the spatial position that metal and clay are different in rotary kiln Discharging.
Preferably, the rotary kiln end configures burner to progress high temperature blowing in rotary kiln, while into rotary kiln Air or oxygen are sprayed, flue-gas temperature in kiln is made to reach 1400 DEG C~1600 DEG C high temperature.
Preferably, packet is connect in the setting heat preservation of rotary kiln discharge end, after separation of material disengaging rotary kiln, the metal stream isolated Beam enters heat preservation and connects packet.
Preferably, the leading portion high-temperature region of the rotary kiln is made of stainless steel, configures water-cooled jacket.
Preferably, whole process intelligent monitor system is configured.
Compared with the existing technology, present invention process is completed from mixing carbonaceous material into kiln, finally on a rotary kiln In the abbreviated system for carrying out high temperature smelting process to carbonaceous mixture material.According to the heterogeneity of material and final production Product requirement is specially designed and is customized formula production to rotary kiln and processed, rather than conventional commercial rotary kiln.The revolution of customization What kiln was finally obtained with horizontal type rotary kiln high temperature rotating abbreviated system is that the metal product of high quality, the high temperature of high stability are forged Burnedc lay product and high-purity smokeshade, product harmless.
Rotary kiln of the invention is restored-is blown in smelting abbreviated system, without the hot drying and dewatering technique of raw material, instead directly It connects and introduces the water in raw material among rotary kiln short processes;Water as ingredient component enter smelting chemical industry skill MaterialBalance Computation and In the conversion conversion of smelting chemical industry artistic skill source efficiency, and play a significant role.
Rotary kiln of the invention restores-blows smelting abbreviated system in implementation process, can satisfy cylinder of rotary kiln During interior laterite smelting, the requirement for the materiality working environment that metal is separated with clay.Used rotary kiln front end is high Warm area makes of stainless steel, there is Forced water cooling set.In used rotary kiln front-end configuration flame injection device and supplement air With the device of oxygen, supplement hot fume aperture is set in rotary kiln middle and back, expects configuration hot fume at rotary kiln rear-fed end Supplementary device.In rotary kiln front end, setting nickel hot-metal insulating connects packet and the dry slag material-receiving device of high temperature clay, the dry slag splicing dress of clay It sets and matches hot fume heat collection transmission energy-saving equipment, on the one hand the clay after high-temperature calcination is rapidly cooled, On the one hand iron removal by magnetic separation is carried out to the calcined clay in transmission belt.Then, high-temperature calcination clay enters ready dry pit, from So cooling, crushing, further iron removal by magnetic separation is examined.If iron content and carbon residue content are up to state standards, dry slag is totally converted For the sale of high-temperature calcination clay-ware.The heat collected in high-temperature calcination clay cooling procedure can enter the thermal cycle of factory Utilize system.High-temperature flue gas recovery system is arranged in rotary kiln upper front end in the present invention, according to the materiality feature of smoke particles By stages is collected smoke particles, packs, sells.
High temperature smelting abbreviated system of the invention may not only be applied to lateritic nickel ore refinement, also can be applied to various The short route of low-grade lean ore.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is that rotary kiln of the present invention restores-blow smelting abbreviated system schematic diagram;
1- dryer section;2- boiling dewatering period;3- low temperature water gas reduction section;4- medium temperature dry gas reduction section;5- high temperature Strong reduction section;The high-temperature oxygen-enriched blowing section of 6-;7- separation export section;8- burner;9- heat preservation connects packet;10- water-cooled jacket;11- metal A fluid stream;12- smoke collecting device;13- magnetic separation.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, With reference to embodiment to this hair It is bright to be described in further detail.It should be noted that in the absence of conflict, in the embodiment and embodiment in the present invention Feature can be combined with each other.
The raw material that the present invention uses can be bought on the market.
Embodiment 1
It blows metallurgical abbreviated system the present embodiment provides a kind of lateritic nickel ore rotary kiln, as shown in Figure 1, nickeliferous 1~ 3%, the sulfur-bearing of iron content 15~30% or not in the natural red soil low grade nickel ore raw material of sulfur-bearing, addition carbonaceous material mixes together It closes, is carried out in a rotary kiln, it is dry to pass sequentially through dryer section 1, boiling dewatering period 2, low temperature water gas reduction section 3, medium temperature The strong reduction section 5 of gas reduction section 4, high temperature, high-temperature oxygen-enriched blowing section 6, separation export this seven work sections of section, are completed aqueous mixed The drying of conjunction material, boiling dehydration, low temperature water gas reduction, the reduction of medium temperature dry gas, high temperature restore by force, high-temperature oxygen-enriched to blow Refining, and the whole process that separates of raw ore to the metal of separation seven kinds of technique forms of export of rotary kiln forward metal and clay is continuous Operation.Specifically comprise the following steps: for the mixed material containing moisture to be sent in rotary kiln, successively roasted through low-temperature boiling, Medium temperature reduction roasting, high temperature restore by force calcining, high temperature blowing, and the heavy metal in mixed material comprising ferronickel is made to separate to be formed High temperature nickel molten iron a fluid stream, the white olivine clay burning material that the also isolated light metal comprising magnesium and high temperature partly melt are described The light metal of magnesium, which is oxidized to form micronic dust and enters flue gas, to be collected.Wherein, low-temperature bake temperature is no more than 400 DEG C, medium temperature reduction Maturing temperature be no more than 700 DEG C, high temperature restore by force calcination temperature be 1100 DEG C~1300 DEG C, high temperature blowing temperature be 1300 DEG C~ 1600℃;Wherein water content permissible value is 8%~30% in the mixed material, and carbon containing permissible value is 10%~30%, sulfur-bearing Permissible value is 0~20%.
The energy required by the decomposition and separation of metal and clay is carried out to lateritic nickel ore in a rotary kiln in order to reach Energy, remains the inherent moisture of raw ore in the lateritic materials for adding carbon to mix, these water be inventor for a special purpose in this process The external energy of introduction.Water introduces after short route, and the reduction reaction for guiding, activating and strengthening entire rotary kiln short route is strong Degree.In different temperature stages, water is separately converted to carbon in steam energy and chemical energy and raw material, sulphur isoreactivity object together, swashs Hair, guidance and the reaction process and reaction energy levels that accelerate material.During short route, in 100 DEG C~350 DEG C temperature Section, water boiling are converted into vapor, and it is anti-that the ascension of vapor drives material to generate many activation such as boiling, friction, activation, heating It answers, these reactions facilitate the synthesis of low temperature water gas, to cause to be lauched coal gas and phase in the relatively low temperature no more than 400 DEG C The low-temperature reduction of material in mutual friction reacts, and therewith, causes and constantly reinforce at occurring no more than 700 DEG C the material accelerated High temperature reduction occurs with dry gas with the medium temperature reduction reaction of water-gas, persistently overheating to material to react, until facilitating and occurring Up to 1100 DEG C~1300 DEG C at a high temperature of, to the reduction reaction of the strong energy level of high-temperature material.These are caused and are activated by water The material structure in laterite raw ore is directly destroyed and destroyed to the reduction reaction of reinforcing, and metallic element is reduced, and remaining high temperature is viscous Soil.
The charging of mixed material described in the present embodiment, discharge method are continuous charging, continuous discharge, and discharge end material is Metal a fluid stream, metal liquid frit and metal liquid granule state;Remaining clay partly melts bulk, metal frit and gold in softening Belong to granule be softened ball clay package or entrainment, by different location, mutually intert it is non-interfering in the form of in periodically discharge.It returns The metal oxide microparticle of high-purity high-activity and high-purity is periodically taken out in the smoke collecting device 12 of rotary kiln barrel port setting The nonmetal oxide particle of high activity is spent, effective rate of recovery of three classes material reaches national environmental protection discharge 90% or more Standard.
The present invention by rotary kiln carry rotating mechanical energy, bring this process into, according to rotary kiln rotate in material carry out spiral shell Line rotational trajectory and material are to be attached at rotary kiln inner surface in rotary kiln, roll to advance to climb to turn back again along inner surface and fall The intrinsic equipment feature fallen is agglomerated into metal using the difference of specific gravity and running running track difference of metal and clay It is independent metal a fluid stream and clay is removed, form rotary kiln front end rolling type metal molten bath and metal a fluid stream, make metal It discharges with clay in the different spatial position of rotary kiln.
In addition, the high-temperature region of the rotary kiln front end makes of stainless steel in the present embodiment, it is provided with Forced water cooling set 10;While rotary kiln end configuration burner 8 is to high temperature blowing is carried out in kiln, air or oxygen are sprayed into kiln, makes kiln Interior flue-gas temperature reaches 1400 DEG C~1600 DEG C high temperature, under the carbon high temperature in rotary kiln material rapidly in conjunction with oxygen, in kiln Mixed material smelting state switchs to rapidly Strong oxdiative state from the strong reducing condition of high temperature, and laterite structure is decomposed collapse, and metal is broken Wall and go out to rotary kiln bottom sink, eventually form metal a fluid stream 11, rotary kiln discharging end bottom flow out rotary kiln.Remaining The semi-vitreous clay on metal a fluid stream surface is floated, as the node of the outflow of metal a fluid stream and a certain end face of rotary kiln revolves Turn to increase, the clay for partly melting state screws out outside rotary kiln after falling the latter timing in end face higher position, screws out position It is not overlapped with metal a fluid stream outflow space position, realizes slag iron separation.After being detached from rotary kiln, metal alloy a fluid stream largely enters Heat preservation connects packet 9, individual scattered metallic particles, and cooling velocity and volume contraction rate are greater than melting clay, although being mixed in viscous It is not bonded mutually but among local product material, as temperature reduction metal and nonmetallic substance sex differernce are gradually increased and are separated from each other, It is just completely clean only need to normally to sort magnetic separation 13 first and second for the high stability substance entirely different as two kinds.
In the abbreviated system of the present embodiment, without the hot drying and dewatering technique of raw material, directly the water in raw material is drawn instead Enter among rotary kiln short processes.Water enters smelting chemical industry skill MaterialBalance Computation and smelting chemical industry artistic skill source efficiency as ingredient component In conversion conversion, and play a significant role.By this abbreviated system, what is finally obtained is metal product, the height of high quality The high-temperature calcination clay product of stability and high-purity smokeshade, product harmless.During process operation, configure Mixed raw material from kiln tail feed endfeed, kiln hood high temperature discharging end reach metal and it is nonmetallic be directly separated discharging, obtain Three kinds of valuable resource substances: complete metal nickel-iron water stream, the white olivine high-temperature calcination for reaching national environmental standard are viscous Soil and extra light calcined magnesia, iron oxide, silica fume particle.
The core heat equipment of the metallurgical abbreviated system of lateritic nickel ore rotary kiln blowing of the present invention is only a rotary kiln.From The raw material prepared is to when entering rotary kiln, until make it have a variety of smelting chemical industry from the special integrated configuration of rotary kiln end The generation and bearing capacity of skill environment.It is divided into preheating and drying functional areas, low-temperature boiling functional areas, low temperature prereduction reaction in kiln Area, medium temperature reduction reaction area, High-Temperature Strengthening reduction reaction area, kiln front High-Temperature Strengthening blowing area and kiln hood high-temperature metal are isolated Expect area, this seven different work sections, maximum temperature, which is used for a long time, in material in kiln can reach nickel at 1500 DEG C or more The temperature condition and isolated time conditions that ferrous metal is separated with nonmetallic clay, the rotating operation being had by oneself using stove rotary kiln Mechanical energy, realization dilval and clay are kept completely separate the result screwed out in kilneye with different location.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.

Claims (8)

1. a kind of lateritic nickel ore rotary kiln restores-blow smelting abbreviated system, use raw material for nickeliferous 0.8~3%, iron content 15 ~30% natural red soil low grade nickel ore, which is characterized in that addition carbonaceous material is mixed with raw material, in a rotary kiln, The drying of completion aqueous mixture material, boiling dehydration, low temperature water gas reduction, the reduction of medium temperature dry gas, high temperature restore by force, high Whole process derived from the separation of warm oxygen-enriched air converting and rotary kiln forward metal and clay is worked continuously;Wherein, cryogenic temperature is not More than 400 DEG C, medium temperature temperature is no more than 700 DEG C, and the strong reduction temperature of high temperature is 1100 DEG C~1300 DEG C, and high temperature blowing temperature is 1300 DEG C~1600 DEG C;In the mixed material water content be 8%~30%, phosphorus content be 10%~30%, sulfur content be 0~ 20%.
2. lateritic nickel ore rotary kiln according to claim 1 restores-blows smelting abbreviated system, which is characterized in that with The mode of continuous charging feeds to feed end, in discharge end collection material in a manner of continuous discharge;Discharge end material is metal A fluid stream, metal liquid frit and metal liquid granule state;The clay isolated partly melts bulk, metal liquid frit in softening Be softened ball clay package or entrainment with metal liquid granule, by different location, mutually intert it is non-interfering in the form of in the period Property discharge.
3. lateritic nickel ore rotary kiln according to claim 1 restores-blows smelting abbreviated system, which is characterized in that point The metal oxide microparticle of the high-purity high-activity separated out and the nonmetal oxide particle of high-purity high-activity are by rotary kiln cylinder The smoke collecting device of body end mouth setting is collected, and is periodically taken out.
4. lateritic nickel ore rotary kiln according to claim 1 restores-blows smelting abbreviated system, which is characterized in that institute It states mixed material and is attached at rotary kiln inner surface in rotary kiln, carry out helical rotational trajectory, roll to advance along inner surface and climb It turns back and falls again, operational process is agglomerated into metal to be independent metal a fluid stream and clay is removed, form rotary kiln front end Rolling type metal molten bath and metal a fluid stream make metal and clay discharge in the different spatial position of rotary kiln.
5. lateritic nickel ore rotary kiln according to claim 1 restores-blows smelting abbreviated system, which is characterized in that institute Rotary kiln end configuration burner is stated to progress high temperature blowing in rotary kiln, while spraying air or oxygen into rotary kiln, Flue-gas temperature in kiln is set to reach 1400 DEG C~1600 DEG C high temperature.
6. lateritic nickel ore rotary kiln according to claim 1 restores-blows smelting abbreviated system, which is characterized in that The setting heat preservation of rotary kiln discharge end connects packet, and after separation of material is detached from rotary kiln, the metal a fluid stream isolated enters heat preservation and connects packet.
7. lateritic nickel ore rotary kiln according to claim 1 restores-blows smelting abbreviated system, which is characterized in that institute It states rotary kiln leading portion high-temperature region to be made of stainless steel, configures water-cooled jacket.
8. lateritic nickel ore rotary kiln according to any one of claims 1 to 7 restores-blows smelting abbreviated system, feature It is, configures whole process intelligent monitor system.
CN201910492256.1A 2019-06-06 2019-06-06 Laterite-nickel ore rotary kiln reduction-blowing smelting process Active CN110144470B (en)

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CN113247909A (en) * 2021-05-17 2021-08-13 李朝侠 Process for recycling red mud by rotary kiln method and rotary kiln
CN113322362A (en) * 2021-04-20 2021-08-31 四川龙蟒矿冶有限责任公司 Self-heating balance laterite reduction method

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CN105463147A (en) * 2015-07-17 2016-04-06 北海诚德镍业有限公司 Method for producing nickel iron powder by directly reducing nickel laterite ores in rotary kiln
CN105714009A (en) * 2016-04-29 2016-06-29 余金铭 Method and device for preparing ferronickel from laterite nickel ores

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AU2354499A (en) * 1998-04-06 1999-10-14 Billiton S.A. Limited Upgrading of nickel laterite ores
CN101403043A (en) * 2008-10-27 2009-04-08 昆明理工大学 Method for producing ferronickel granule with direct reduction of laterite nickel mine with rotary kiln
CN101538626A (en) * 2009-05-06 2009-09-23 毛黎生 Method for directly producing nickel-bearing pig iron in rotary kilns by using laterite-nickel
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Publication number Priority date Publication date Assignee Title
CN113322362A (en) * 2021-04-20 2021-08-31 四川龙蟒矿冶有限责任公司 Self-heating balance laterite reduction method
CN113247909A (en) * 2021-05-17 2021-08-13 李朝侠 Process for recycling red mud by rotary kiln method and rotary kiln

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