CN107312939A - A kind of lateritic nickel ore powder state smelting ferronickel equipment and technique - Google Patents
A kind of lateritic nickel ore powder state smelting ferronickel equipment and technique Download PDFInfo
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- CN107312939A CN107312939A CN201710760028.9A CN201710760028A CN107312939A CN 107312939 A CN107312939 A CN 107312939A CN 201710760028 A CN201710760028 A CN 201710760028A CN 107312939 A CN107312939 A CN 107312939A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/02—Obtaining nickel or cobalt by dry processes
- C22B23/023—Obtaining nickel or cobalt by dry processes with formation of ferro-nickel or ferro-cobalt
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C35/00—Master alloys for iron or steel
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Abstract
A kind of lateritic nickel ore powder state smelting ferronickel equipment and technique, belong to ferronickel production equipment and process.Equipment includes：Drying device, grinding device and smelting apparatus；Drying device, grinding device and smelting apparatus are linked in sequence.Processing step：1）Dry；2）Grinding；3）Melting；The waste heat flue gas of Flash Smelting Furnace, which enters, to be dried and grinding system, and heat acts on dry link in one side gas, and UTILIZATION OF VESIDUAL HEAT IN reduces energy consumption；Pit wood material, which is fallen to, in another aspect flue gas dries with grinding system, again returns to smelting system, improves productivity ratio, reduces pollutant emission.Qualified discharge after total system stream closed operation, waste gas purification；Equipment includes：Drying device, grinding device and smelting apparatus；Drying device, grinding device and smelting apparatus are linked in sequence.Advantage：Fully, substantially, technological process is simple, advantages of environment protection for energy-saving effect for waste gas, UTILIZATION OF VESIDUAL HEAT IN.
Description
Technical field
The present invention relates to a kind of ferronickel production equipment and process, more particularly to a kind of lateritic nickel ore phenolphthalein smelting ferronickel equipment and work
Skill.
Background technology
Nickel iron series stainless steel is due to itself excellent combination property, and production and consumption rate increase are rapid, cause China's nickel
Consumption is increased rapidly, and laterite-type nickel ore can produce the intermediate products such as nickel oxide, sulphur nickel, iron nickel, and lateritic nickel ore produces nickel
In the method for iron, the ripe large-scale production of technics comparing is based on pyrometallurgy.Chinese Enterprises are with the production work of pyrometallurgy
Skill is blast furnace process and electric furnace smelting, and blast furnace process and electric furnace smelting process have high energy consumption, high pollution, me do not met increasingly
State's environmental protection policy requirement, will be phased out.
The content of the invention
It is an object of the invention to provide a kind of energy consumption is low, technique is simple, environment-friendly powder state smelting ferronickel equipment and work
Skill, solves the problem of high energy consumption of generally existing, high pollution in existing smelting process.
The object of the present invention is achieved like this, and the present invention includes powder state ferronickel smelting proces and powder state smelting ferronickel is set
It is standby；
Described powder state smelting ferronickel equipment includes：Drying device, grinding device and smelting apparatus；Drying device, grinding device
It is linked in sequence with smelting apparatus.
Described drying device includes：Lateritic nickel ore heap canopy, reclaimer, crushing conveyor, break up conveyer, revolution drying
Conveyer, Gan Kuang storehouses conveyer, beater, rotary drying machine, drying thermal chimney, drying kiln, nozzle, cooler, raw ore are broken
Broken machine, dry ore deposit disintegrating machine, dry ore storage bin and drying dust-precipitator；Lateritic nickel ore heap canopy mouthful is close with feeding machine inlet, and reclaimer goes out
Material mouth and crushing conveyor and break up conveyer entrance and overlap respectively, crushing conveyor delivery outlet is taken with crushing raw ore machine entrance
Connect, crushing raw ore machine is exported with breaing up conveyer overlap joint, breaks up conveyer, beater, rotary drying machine, drying kiln, cooler
Overlapped with the entrance and exit order of dry ore deposit disintegrating machine；The outlet of beater passes through, turns round drying conveyor and rotary drying machine
Entrance is overlapped；It is connected between the end that rotary drying machine and drying kiln are mutually overlapped, dries thermal chimney；In the another of drying kiln
There is nozzle one end, and nozzle is connected with melting fume pipe；The exhanst gas outlet of rotary drying machine and cooler connects drying and received simultaneously
Dirt device, the delivery outlet of dry ore deposit disintegrating machine is connected by Gan Kuang storehouses conveyer with the entrance of dry ore storage bin.
Described grinding device includes：Vertical Mill conveyer, powder storehouse conveyer, dry ore bucket are carried, powder storehouse bucket is carried, dry ore deposit
Storehouse, grinding dust-precipitator, Vertical Mill, cyclone separator, filler bin and Vertical Mill measuring chute；The delivery outlet of dry ore storage bin is overlapped on dry ore bucket and carried
Entrance；The outlet that dry ore bucket is carried is connected with Vertical Mill measuring chute entrance, and the outlet of Vertical Mill measuring chute is connected with Vertical Mill entrance, Vertical Mill
Product outlet is overlapped on above Vertical Mill conveyer by cyclone separator, and the discharge end of Vertical Mill conveyer is located at powder storehouse and struggles against what is carried
Feeding mouth, the powder storehouse discharging opening that carries of bucket passes through, powder storehouse conveyer and the feeding mouth overlap joint in powder storehouse；Grinding dust-precipitator enters
Mouth is connected with the dust outlet of cyclone separator upper end, and the outlet of grinding dust-precipitator is positioned at the top of Vertical Mill conveyer；In Vertical Mill
Smoke inlet is connected with melting thermal chimney.
Described smelting apparatus includes：Melting conveyer, filler bin, melting measuring chute and Flash Smelting Furnace；The discharging in powder storehouse
Mouth is overlapped with melting conveyer entrance, and melting conveyer output end is connected with melting measuring chute entrance, melting measuring chute and flash
The feeding mouth connection of stove.
The lateritic nickel ore powder state ferronickel smelting proces, comprise the following steps：
（1）Dry：Lateritic nickel ore raw material through disintegrating machine, beater it is scattered after sequentially enter rotary drying machine, dry in drying kiln
Dehydration；
（2）Grinding：Grinding is carried out to flour in nickel minerals raw material feeding grinding machine after drying, and material enters material storing after grinding
In storehouse；
（3）Flash Smelting Furnace melting：Material enters melting in Flash Smelting Furnace after drying；
（4）The waste heat flue gas of Flash Smelting Furnace discharge leads directly to drying steps, grinding step.
The step（1）In, the material moisture control after rotary drying machine drying is 15 ~ 20% or so, after drying kiln is dried
Material moisture is controlled within 5%；
The step（2）Material grinding fineness is less than 0.08mm；
The step（1）With step（2）Thermal source comes from Flash Smelting Furnace waste heat flue gas；Flash Smelting Furnace discharges high-temperature flue gas through latter portion of burning
Divide and drying kiln is entered by drying kiln nozzle, then heat smoke enters rotary drying machine from drying kiln hood, is provided for drying system
Heat, another part enter grinding machine grinding system in there is provided grinding system heat, finally purified gather dust is discharged into air.
The step（4）Flash Smelting Furnace melting discharge flue gas enters iron-doped nickel oxide in drying system and grinding system, flue gas
It is deposited in and dries with grinding system, is again introduced into Flash Smelting Furnace melting.
Beneficial effect and advantage：
1st, flash furnace smelting process discharge waste heat flue gas is rationally utilized, heat is effectively applied to dried and grinding device respectively
In, UTILIZATION OF VESIDUAL HEAT IN reduces energy consumption.
2nd, part iron-doped nickel oxide enters dry with grinding system, returning to Flash Smelting Furnace melting, carrying with flue gas in Flash Smelting Furnace
High production rate, reduces pollutant emission.
3rd, using lateritic nickel ore powder state ferronickel smelting proces, technological process is easy, and control is simple, and energy consumption cost significantly drops
Low, system off gas purification discharge improves production efficiency and social benefit.
Brief description of the drawings
Fig. 1 is lateritic nickel ore powder state ferronickel smelting proces flow chart of the invention.
Fig. 2 is drying technology process figure of the invention.
Fig. 3 is grinding process figure of the invention.
Fig. 4 is ferronickel smelting proces flow chart of the invention.
In figure：1st, lateritic nickel ore heap canopy；2nd, reclaimer；3-1, crushing conveyor；3-2, break up conveyer；3-3, revolution are dried
Dry conveyer；3-4, Gan Kuang storehouse conveyer；3-5, Vertical Mill conveyer；3-6, powder storehouse conveyer；3-7 melting conveyers；4th, beat
Dissipate machine；5th, rotary drying machine；5-1, drying thermal chimney；6th, drying kiln；6-1, nozzle；7th, cooler；8-1, crushing raw ore machine；
8-2, dry ore deposit disintegrating machine；9th, dry ore storage bin；10-1, drying dust-precipitator；10-2, grinding dust-precipitator；11st, Vertical Mill；11-1 smelting heat cigarettes
Tracheae；12nd, cyclone separator；13rd, filler bin；14-1, Vertical Mill measuring chute；14-2, melting measuring chute；15-1, dry ore bucket are carried；
15-2, powder storehouse bucket are carried；16th, Flash Smelting Furnace；16-1, coal charge entrance；16-2, pulverized limestone and quartz powder materials entrance；16-3, flue；
16-4, slag notch；16-5, tapping hole.
Embodiment
The present invention includes powder state ferronickel smelting proces and powder state smelting ferronickel equipment；
Described powder state smelting ferronickel equipment includes：Drying device, grinding device and smelting apparatus；Drying device, grinding device
It is linked in sequence with smelting apparatus.
Described drying device includes：Lateritic nickel ore heap canopy 1, reclaimer 2, crushing conveyor 3-1, break up conveyer 3-2,
Turn round drying conveyor 3-3, Gan Kuang storehouse conveyer 3-4, beater 4, rotary drying machine 5, drying thermal chimney 5-1, drying kiln
6th, nozzle 6-1, cooler 7, crushing raw ore machine 8-1, dry ore deposit disintegrating machine 8-2, dry ore storage bin 9 and drying dust-precipitator 10-1；Laterite nickel
1 mouthful of ore deposit heap canopy is close with the charging aperture of reclaimer 2, the discharging opening of reclaimer 2 and crushing conveyor 3-1 and breaks up conveyer 3-2 entrances
Overlap respectively, crushing conveyor 3-1 delivery outlets are overlapped with crushing raw ore machine 8-1 entrances, crushing raw ore machine 8-1 is exported with breaing up defeated
Send machine 3-2 to overlap, break up conveyer 3-2, beater 4, rotary drying machine 5, drying kiln 6, cooler 7 and dry ore deposit disintegrating machine 8-2
Entrance and exit order overlap；The outlet of beater 4 is overlapped by turning round drying conveyor 3-3 with the entrance of rotary drying machine 5；
Drying thermal chimney 5-1 is connected between the end that rotary drying machine 5 and drying kiln 6 are mutually overlapped；In the other end of drying kiln 6
There are nozzle 6-1, nozzle 6-1 to be connected with melting thermal chimney 11-1；The exhanst gas outlet of rotary drying machine 5 and cooler 7 is simultaneously
Connection drying dust-precipitator 10-1, the delivery outlet for doing ore deposit disintegrating machine 8-2 is connected by the entrance of Gan Kuang storehouses conveyer 3-4 and dry ore storage bin 9
Connect.
Described grinding device includes：Vertical Mill conveyer 3-5, powder storehouse conveyer 3-6, dry ore bucket carry 15-1, powder storehouse
Bucket carries 15-2, dry ore storage bin 9, grinding dust-precipitator 10-2, Vertical Mill 11, cyclone separator 12, filler bin 13 and Vertical Mill measuring chute 14-1；
The delivery outlet of dry ore storage bin 9 is overlapped on the entrance that dry ore bucket carries 15-1；Dry ore bucket proposes 15-1 outlet and Vertical Mill measuring chute 14-1 enters
Mouth is connected, and Vertical Mill measuring chute 14-1 outlets are connected with the entrance of Vertical Mill 11, and the product outlet of Vertical Mill 11 is taken by cyclone separator 12
It is connected on above Vertical Mill conveyer 3-5, Vertical Mill conveyer 3-5 discharge end is located at the feeding mouth that powder storehouse bucket carries 15-2, powder storehouse
The discharging opening that bucket carries 15-2 is overlapped by powder storehouse conveyer 3-6 and the feeding mouth in powder storehouse 12；Grinding dust-precipitator 10-2's enters
Mouth is connected with the dust outlet of the upper end of cyclone separator 12, and grinding dust-precipitator 10-2 outlet is positioned at the upper of Vertical Mill conveyer 3-5
Side；Melting thermal chimney 11-1 is connected with the smoke inlet of Vertical Mill 11.
Described smelting apparatus includes：3-7, melting conveyer；13rd, filler bin；14-2, melting measuring chute；16th, flash
Stove；The discharging opening in powder storehouse 13 is overlapped with melting conveyer 3-7 entrances, melting conveyer 3-7 output ends and melting measuring chute 14-
2 entrances are connected, and melting measuring chute 14-2 is connected with the feeding mouth of Flash Smelting Furnace 16；There are coal charge entrance 16-1, lime on Flash Smelting Furnace
Powder and quartz powder materials entrance 16-2, flue 16-3, slag notch 16-4 and tapping hole 16-5.
The lateritic nickel ore powder state ferronickel smelting proces, comprise the following steps：
（1）Dry：Lateritic nickel ore raw material through disintegrating machine, beater it is scattered after sequentially enter rotary drying machine, dry in drying kiln
Dehydration；
（2）Grinding：Grinding is carried out to flour in nickel minerals raw material feeding grinding machine after drying, and material enters material storing after grinding
In storehouse；
（3）Flash Smelting Furnace melting：Material enters melting in Flash Smelting Furnace after drying；
（4）The waste heat flue gas of Flash Smelting Furnace discharge leads directly to drying steps, grinding step.
The step（1）In, the material moisture control after rotary drying machine drying is 15 ~ 20% or so, after drying kiln is dried
Material moisture is controlled within 5%；
The step（2）Material grinding fineness is less than 0.08mm；
The step（1）With step（2）Thermal source comes from Flash Smelting Furnace waste heat flue gas；Flash Smelting Furnace discharges high-temperature flue gas through latter portion of burning
Divide and drying kiln is entered by drying kiln nozzle, then heat smoke enters rotary drying machine from drying kiln hood, is provided for drying system
Heat, another part enter grinding machine grinding system in there is provided grinding system heat, finally purified gather dust is discharged into air.
The step（4）Flash Smelting Furnace melting discharge flue gas enters iron-doped nickel oxide in drying system and grinding system, flue gas
It is deposited in and dries with grinding system, is again introduced into Flash Smelting Furnace melting.
Embodiment 1：The present invention is a kind of lateritic nickel ore powder state ferronickel smelting proces, and its embodiment is as follows：
The lateritic nickel ore used in the present embodiment comes from Indonesia, nickeliferous more than 1.9%, Total iron content 14.6%, moisture
About 30 ~ 35%（Outer water）.
A kind of lateritic nickel ore powder state ferronickel smelting proces, its process chart is as shown in figure 1, comprise the following steps：
Step 1, dry：Lateritic nickel ore is taken, is taken off in the lateritic nickel ore feeding rotary drying machine and drying kiln after crushing, break up
Water, lateritic nickel ore enters Gan Kuang storehouses after drying.Wherein：Material moisture after rotary drying machine drying（Outer water）Control is 15 ~ 20%
Left and right, material moisture after drying kiln is dried（Outer water）Control is 5%.（See Fig. 2）（Outer water, interior water is not handled）
Step 2, grinding：Material takes out from Gan Kuang storehouses enters flour mill, through levigate to isolating powder through cyclone separator after powdery
Shape thing, is transported to powder storehouse.（See Fig. 3）.
Step 3, Flash Smelting Furnace melting：Material enters Flash Smelting Furnace melting after grinding, and slag separates discharging with dilval.（See
Fig. 4）
Flash Smelting Furnace discharge waste heat gas is passed through drying system and grinding system, and waste gas is purified is discharged into air for discharge.
Those skilled in the art is not under conditions of the spirit and scope of the present invention of claims determination are departed from, also
Various modifications can be carried out to above content.Therefore the scope of the present invention is not limited in the explanation of the above, but by
The scope of claims is determined.
Claims (8)
1. a kind of lateritic nickel ore powder state smelting ferronickel equipment, it is characterized in that：Powder state smelting ferronickel equipment includes：Drying device, powder
Mill apparatus and smelting apparatus；Drying device, grinding device and smelting apparatus are linked in sequence.
2. a kind of lateritic nickel ore powder state smelting ferronickel equipment according to claim 1, it is characterized in that：Described drying device
Including：Lateritic nickel ore heap canopy, reclaimer, crushing conveyor, break up conveyer, revolution drying conveyor, Gan Kuang storehouses conveyer, beat
Dissipate machine, rotary drying machine, drying thermal chimney, drying kiln, nozzle, cooler, crushing raw ore machine, dry ore deposit disintegrating machine, dry ore storage bin
With drying dust-precipitator；Lateritic nickel ore heap canopy mouthful is close with feeding machine inlet, reclaimer discharging opening and crushing conveyor and breaks up
Conveyer entrance is overlapped respectively, and crushing conveyor delivery outlet is overlapped with crushing raw ore machine entrance, and crushing raw ore machine is exported with breaing up
Conveyer is overlapped, and breaks up the entrance and exit of conveyer, beater, rotary drying machine, drying kiln, cooler and dry ore deposit disintegrating machine
Order is overlapped；The outlet of beater passes through, turns round drying conveyor and rotary drying machine entrance overlap joint；In rotary drying machine and baking
It is connected between the end that dry kiln is mutually overlapped, dries thermal chimney；Have in the other end of drying kiln, nozzle, nozzle and melting cigarette
Tracheae is connected；The exhanst gas outlet of rotary drying machine and cooler connects drying dust-precipitator simultaneously, does the delivery outlet of ore deposit disintegrating machine
It is connected by Gan Kuang storehouses conveyer with the entrance of dry ore storage bin.
3. a kind of lateritic nickel ore powder state smelting ferronickel equipment according to claim 1, it is characterized in that：Described grinding device
Including：Vertical Mill conveyer, powder storehouse conveyer, dry ore bucket are carried, powder storehouse bucket is carried, dry ore storage bin, grinding dust-precipitator, Vertical Mill, whirlwind
Separator, filler bin and Vertical Mill measuring chute；The delivery outlet of dry ore storage bin is overlapped on the entrance that dry ore bucket is carried；Outlet that dry ore bucket is carried with
Vertical Mill measuring chute entrance is connected, and the outlet of Vertical Mill measuring chute is connected with Vertical Mill entrance, and the product outlet of Vertical Mill passes through cyclone separator
It is overlapped on above Vertical Mill conveyer, the discharge end of Vertical Mill conveyer is located at the feeding mouth that powder storehouse bucket is carried, and what powder storehouse bucket was carried goes out
Material mouth is overlapped by, powder storehouse conveyer and the feeding mouth in powder storehouse；The entrance of grinding dust-precipitator and cyclone separator upper end
Dust outlet is connected, and the outlet of grinding dust-precipitator is positioned at the top of Vertical Mill conveyer；Smelting heat is connected with Vertical Mill smoke inlet
Fume pipe.
4. a kind of lateritic nickel ore powder state smelting ferronickel equipment according to claim 1, it is characterized in that：Described smelting apparatus
Including：Melting conveyer, filler bin, melting measuring chute and Flash Smelting Furnace；The discharging opening in powder storehouse is overlapped with melting conveyer entrance,
Melting conveyer output end is connected with melting measuring chute entrance, the feeding mouth connection of melting measuring chute and Flash Smelting Furnace.
5. a kind of lateritic nickel ore powder state ferronickel smelting proces, it is characterized in that：Comprise the following steps：
（1）Dry：Lateritic nickel ore raw material through disintegrating machine, beater it is scattered after sequentially enter rotary drying machine, dry in drying kiln
Dehydration；
（2）Grinding：Grinding is carried out to flour in nickel minerals raw material feeding grinding machine after drying, and material enters material storing after grinding
In storehouse；
（3）Flash Smelting Furnace melting：Material enters melting in Flash Smelting Furnace after drying；
（4）The waste heat flue gas of Flash Smelting Furnace discharge leads directly to drying steps, grinding step.
6. a kind of technique of lateritic nickel ore powder state smelting ferronickel according to claim 5, it is characterized in that：
The step（1）In, the material moisture control after rotary drying machine drying is in 15 ~ 20% or so, material after drying kiln is dried
Moisture is controlled within 5%；
The step（2）Material grinding fineness is less than 0.08mm.
7. a kind of lateritic nickel ore powder state ferronickel smelting proces according to claim 5, it is characterized in that：Flash Smelting Furnace discharges high temperature cigarette
Gas enters drying kiln through burning rear portion by drying kiln nozzle, and then heat smoke enters rotary drying machine from drying kiln hood,
Heat is provided for drying system, and another part enters in the grinding system of grinding machine there is provided grinding system heat, finally purified
Gather dust and be discharged into air.
8. a kind of lateritic nickel ore powder state ferronickel smelting proces according to claim 5, it is characterized in that：The step（4）Flash
Stove melting discharge flue gas enters iron-doped nickel oxide in drying system and grinding system, flue gas and is deposited in dry and grinding system,
It is again introduced into Flash Smelting Furnace melting.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710760028.9A CN107312939A (en) | 2017-08-30 | 2017-08-30 | A kind of lateritic nickel ore powder state smelting ferronickel equipment and technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710760028.9A CN107312939A (en) | 2017-08-30 | 2017-08-30 | A kind of lateritic nickel ore powder state smelting ferronickel equipment and technique |
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| CN107312939A true CN107312939A (en) | 2017-11-03 |
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ID=60176506
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| CN201710760028.9A Pending CN107312939A (en) | 2017-08-30 | 2017-08-30 | A kind of lateritic nickel ore powder state smelting ferronickel equipment and technique |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0643147A2 (en) * | 1993-08-30 | 1995-03-15 | Mintek | The production of ferronickel from nickel containing laterite |
| CN201912984U (en) * | 2010-11-19 | 2011-08-03 | 武汉长利玻璃有限责任公司 | Drying structure of petroleum coke powder fuel flour mill |
| CN102492859A (en) * | 2011-12-22 | 2012-06-13 | 云锡元江镍业有限责任公司 | Material charging method for laterite electric furnace smelting |
| CN104018008A (en) * | 2014-06-25 | 2014-09-03 | 吉林吉恩镍业股份有限公司 | Method for producing nickel iron by laterite-nickel ore flash furnace reduction smelting |
| CN106399718A (en) * | 2016-08-31 | 2017-02-15 | 广西盛隆冶金有限公司 | Lateritic nickel ore treating method capable of efficiently recovering nickel resources |
| CN106705621A (en) * | 2016-12-30 | 2017-05-24 | 天津闪速炼铁技术有限公司 | Drying device for metallurgical raw materials and drying method applying drying device |
-
2017
- 2017-08-30 CN CN201710760028.9A patent/CN107312939A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0643147A2 (en) * | 1993-08-30 | 1995-03-15 | Mintek | The production of ferronickel from nickel containing laterite |
| CN201912984U (en) * | 2010-11-19 | 2011-08-03 | 武汉长利玻璃有限责任公司 | Drying structure of petroleum coke powder fuel flour mill |
| CN102492859A (en) * | 2011-12-22 | 2012-06-13 | 云锡元江镍业有限责任公司 | Material charging method for laterite electric furnace smelting |
| CN104018008A (en) * | 2014-06-25 | 2014-09-03 | 吉林吉恩镍业股份有限公司 | Method for producing nickel iron by laterite-nickel ore flash furnace reduction smelting |
| CN106399718A (en) * | 2016-08-31 | 2017-02-15 | 广西盛隆冶金有限公司 | Lateritic nickel ore treating method capable of efficiently recovering nickel resources |
| CN106705621A (en) * | 2016-12-30 | 2017-05-24 | 天津闪速炼铁技术有限公司 | Drying device for metallurgical raw materials and drying method applying drying device |
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