CN110055405A - A kind of preparation method of laterite nickel ore pellets - Google Patents
A kind of preparation method of laterite nickel ore pellets Download PDFInfo
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- CN110055405A CN110055405A CN201910319087.1A CN201910319087A CN110055405A CN 110055405 A CN110055405 A CN 110055405A CN 201910319087 A CN201910319087 A CN 201910319087A CN 110055405 A CN110055405 A CN 110055405A
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- Prior art keywords
- preparation
- nickel ore
- ore
- pelletizing
- grinding machine
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
-
- 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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
-
- 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
- C22B23/005—Preliminary treatment of ores, e.g. by roasting or by the Krupp-Renn process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
- B02C2023/165—Screen denying egress of oversize material
Abstract
A kind of preparation method of laterite nickel ore pellets, include the following steps: that the lateritic nickel ore 1) by granularity less than 400mm feeds first segment grinding machine, its ore discharge is classified through classifying equipoment A, and the material greater than 10mm returns to first segment grinding machine after crushing or enters second segment grinding machine；Material less than 10mm enters classifying equipoment B classification, and the material greater than 0.5mm enters second segment grinding machine, and ore discharge returns to classifying equipoment B, and the fine fraction less than 0.5mm is qualified grain size ore pulp；2) the resulting ore pulp of step A is dehydrated, obtains material of the moisture content less than 40%；3) step B resulting material is dried, obtains the material that moisture is suitble to pelletizing, powder additive is added, carried out pelletizing and sieve, screenings returns to pelletizing operation, and oversize is the pellet of qualified grain size.Production cost of the present invention is low, and process is smooth, is adapted to large-scale production.
Description
Technical field
The present invention relates to field of metallurgy, and in particular to a kind of preparation method of laterite nickel ore pellets.
Background technique
With the increasingly exhaustion of nickel sulfide ore resource, account for about the lateritic nickel ore resource of world land nickel reserves 70% in the whole world
The status of nickel industry increasingly rises.At present from the commercial run of lateritic nickel ore extraction nickel and cobalt based on pyrometallurgic methods, and
Lateritic nickel ore is prepared into pellet mostly in pyrometallurgic methods.One big feature of extraction lateritic nickel ore be moisture content compared with
Height, generally higher than 30%, and the preparation process of existing pellet is first to dry extraction lateritic nickel ore, is then crushed, then dry type
Ore grinding and classification, production equipment are difficult to enlargement, and grinding efficiency is low, and dust pollution is serious.Patent ZL201210203499.7
Disclose a kind of manufacturing method of laterite nickel ore pellets, this method be first by lateritic nickel ore 650 DEG C it is baked above at least
40min or more, then fine grinding is at least 60% less than 200 purposes, obtains finished product using mixing pelletizing, drying, roasting.The party
Method first carries out medium temperature roast, then levigate rear plus water pelletizing to lateritic nickel ore, increases process, energy consumption and expense.Patent
ZL20110035147.0 discloses a kind of method of producing pellets from laterite-nickel ore, which is in raw ore with addition of matter
The bentonite of score 1%~4% and 1%~8% quick lime are measured, mixes pelletizing, screening obtains qualified green-ball, then is roasted
Bake knot.The invention does not specify the granularity of raw ore, and bentonite pelletizing is added, and reduces the nickel grade of pellet, and product is additional
Value decreases.Patent ZL201310652952.7 discloses a kind of process for briquetting oxidation pellets from laterite nickel ore, which is first
Lateritic nickel ore is dried, partial size 3mm is then crushed to hereinafter, water and additive are added in lateritic nickel ore powder, is mixed into
Green-ball is carried out oxidizing roasting, then cooling obtains acid pellet by mixture pressure ball at green-ball by mixture.There are energy for the technique
The problems such as consuming and be costly.In conclusion existing pellet preparation method is raw ore drying → broken → dry milling
→ adding water pelletizing → drying high energy consumption technique, low, equipment that there are high energy consumption and efficiencies is difficult to enlarged, dust pollution is serious etc.
Outstanding problem.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, provide a kind of system of laterite nickel ore pellets
Preparation Method, it has, and production cost is low, does not have dust harzard, advantages of environment protection, is adaptable to large-scale production.
In order to solve the above technical problems, technical solution proposed by the present invention are as follows: a kind of preparation side of laterite nickel ore pellets
Method includes the following steps:
1) ore grinding and classification: the lateritic nickel ore by granularity less than 400mm feeds first segment grinding machine, and ore discharge is through classifying equipoment
A classification, the material greater than 10mm return to first segment grinding machine after crushing or enter second segment grinding machine；Material less than 10mm enters
Classifying equipoment B classification, the material greater than 0.5mm enter second segment grinding machine, and ore discharge returns to classifying equipoment B, thin less than 0.5mm
Grade is qualified grain size ore pulp, and ore pulp moisture content is greater than 50%；
2) it is concentrated and is dehydrated: ore pulp obtained in step 1) being concentrated and is dehydrated, obtains moisture content less than 40%
Material, the water return step 1 of removing) first segment grinding machine and classifying equipoment；
3) dry and pelletizing: resulting material in step 2) being dried using high-temperature gas, obtains moisture and is suitble to pelletizing
Material, be added powder additive, carry out pelletizing simultaneously sieve, screenings return pelletizing operation, oversize is qualified grain size
Pellet.
The further technical solution of the present invention are as follows: the moisture content of qualified fine fraction ore pulp is greater than 50% in the step 1).
Further, the water return step 1 removed in the step 2)) first segment grinding machine and classifying equipoment.
Further, the moisture content that the material of pelletizing is suitble in the step 3) is 5~10%.
Further, first segment grinding machine is autogenous tumbling mill or semi-autogenous mill in the step 1), and classifying equipoment A is single layer vibration
One of sieve, drum sieve or double-deck screen shale shaker；Second segment grinding machine is ball mill, and classifying equipoment B is cyclone, screw classifying
The combination of one or both of machine, vibrating screen；Broken greater than the material of 10mm uses gyratory crusher.
Further, concentration and dehydration equipment are concentrator, filter press, band filter, ceramic filter in the step 2)
One or more of machine, horizontal type screw settling centrifuge.
Further, the drying equipment in the step 3) is roller drier, in boiling drier, fluid bed dryer
It is one or more of；Balling equipment in the step 3) is disc balling machine or ball press, and sphere diameter is 5~50mm.
Further, the additive in the step 3) includes reducing agent, chlorinating agent and roasting auxiliary agent, and the reducing agent is coke
Powder or coal dust, the chlorinating agent are one or more of sodium chloride, potassium chloride, calcium chloride or magnesium chloride.
Further, the chlorinating agent is to recycle to obtain from the indirect roasting process in laterite nickel ore pellets later period.
Further, the pellet of qualified grain size obtained in the step 3) is used for the compound roasting procedure extraction nickel in later period
And cobalt.
Compared with the prior art, the advantages of the present invention are as follows:
1, due to the aqueous height of the lateritic nickel ore of extraction, and there is lump ore, the present invention first uses wet self-grinding or Semi-Autogenous
Or ball milling ore grinding, it can not only make rock processing direct motion, adapt to large-scale production, production cost is low, and does not have dust harzard,
It is environmental-friendly；
2, the water of grinding classification system of the invention can be recycled in inside, advantageously reduce production cost, protection ring
Border；
3, dry materials degree of the invention reaches the material requirement of pelletizing, and one can reduce drying cost, and two can subtract
Few dust harzard；
4, chlorinating agent of the invention may be either that solid-state form is added, and can also be added for solution form, this is from baking tail gases
The utilization of the chlorination agent solution of recycling creates condition, and can reduce chlorinating agent production link, reduces production cost.
Detailed description of the invention
Fig. 1 is process flow chart of the invention；
Fig. 2 is the technique and structural schematic diagram of the specific embodiment of the invention 1；
Fig. 3 is the technique and structural schematic diagram of the specific embodiment of the invention 2.
Marginal data:
1, granularity is less than the lateritic nickel ore of 350mm；2, semi-autogenous mill；3, linear vibrating screen；4, belt；5, crusher；6,
Pump box；7, Pulp pump；8, cyclone；9, ball mill；10, concentrator；11, horizontal type screw settling centrifuge；12, roller drying
Machine；13, high-temperature gas；14, the additive of powdery；15, mixing machine；16, balling disk (-sc)；17, screening plant；18, qualified grain size
Pellet (green-ball)；19, double-deck screen shale shaker；20, band filter；21, chloride containing agent solution；22, ball press.
Specific embodiment
To facilitate the understanding of the present invention, the present invention is made below in conjunction with Figure of description and preferred embodiment more complete
Face meticulously describes, but the protection scope of the present invention is not limited to the following specific embodiments.
Embodiment 1:
Referring to Fig. 1 and Fig. 2, a kind of preparation method of laterite nickel ore pellets, includes the following steps:
1) ore grinding and classification: the lateritic nickel ore 1 by granularity less than 350mm feeds semi-autogenous mill 2, and ore discharge is through straight-line oscillation
3 classification of sieve, the material greater than 10mm is delivered to after crusher 5 is crushed through belt 4 returns to semi-autogenous mill 2；Material less than 10mm
It send through pump box 6 and Pulp pump 7 to cyclone 8 and is classified, hydrocyclone sand enters 9 ore grinding of ball mill, and cyclone overflow is qualification
Grade (being less than 0.5mm) ore pulp, ore pulp moisture content is 60% or so；
2) it is concentrated and is dehydrated: for qualified grain size ore pulp, being first concentrated using concentrator 10, then is heavy using horizontal spiral
It drops centrifuge 11 to be dehydrated, obtains the material that moisture content is 30% or so, the water of removing returns to Semi-Autogenous and screening operation；
3) dry, ingredient and pelletizing: the material that moisture content is 30% or so is fed into roller drier 12, and introduces roasting
The high-temperature gas 13 that process generates is dried, and obtains the material that moisture is suitble to pelletizing, adds (the reduction of powder additive 14
Agent, chlorinating agent and auxiliary agent) it is mixed in mixing machine 15, pelletizing, the screened equipment of institute's pelletizing material are then carried out using balling disk (-sc) 16
17 screenings, oversize are the pellet (green-ball) 18 of qualified grain size, and screenings (powder) returns to pelletizing operation.
Embodiment 2:
Referring to Fig. 1 and Fig. 3, a kind of preparation method of laterite nickel ore pellets includes the following steps:
1) ore grinding and classification: the lateritic nickel ore 1 by granularity less than 350mm feeds semi-autogenous mill 2, and ore discharge is vibrated through bilayer
19 classification of sieve, the material greater than 10mm is delivered to after crusher 5 is crushed through belt 4 returns to semi-autogenous mill 2；The material of 3~10mm
Into 9 ore grinding of ball mill；The ore discharge of material and ball mill 9 less than 3mm, which is sent through pump box 6 and Pulp pump 7 to cyclone 8, to be divided
Grade, hydrocyclone sand enter 9 ore grinding of ball mill, and cyclone overflow is qualified grain size (being less than 0.5mm) ore pulp, ore pulp moisture content
It is 65% or so；
2) it is concentrated and is dehydrated: for qualified grain size ore pulp, being first concentrated using concentrator 10, then use band filter
20 dehydrations, obtain the material that moisture content is 30% or so, and the water of removing returns to Semi-Autogenous and screening operation；
3) dry, ingredient and pelletizing: the material that moisture content is 30% or so is fed into roller drier 12, and introduces roasting
The high-temperature gas 13 that process generates is dried, and obtains the material that moisture is suitble to pelletizing, the material being dehydrated is fed mixing machine
15, powder additive 14 (reducing agent, chlorinating agent and auxiliary agent) and chloride containing agent solution 21 are added, is uniformly mixed, roasting is introduced
The high-temperature gas 13 that burning process generates is dried, and obtains the material that moisture is suitble to pelletizing, is then made using ball press 22
Ball, the screened equipment 17 of institute's pelletizing material, oversize are the pellet (green-ball) 18 of qualified grain size, and screenings (powder) return is made
Ball operation.
Claims (10)
1. a kind of preparation method of laterite nickel ore pellets, which comprises the steps of:
1) ore grinding and classification: the lateritic nickel ore by granularity less than 400mm feeds first segment grinding machine, and ore discharge is through classifying equipoment A points
Grade, the material greater than 10mm return to first segment grinding machine after crushing or enter second segment grinding machine；Material less than 10mm, which enters, to be divided
Grade equipment B classification, the material greater than 0.5mm enter second segment grinding machine, and ore discharge returns to classifying equipoment B, the particulate less than 0.5mm
Grade is qualified grain size ore pulp；
2) it is concentrated and is dehydrated: concentration and dehydration equipment being carried out to ore pulp obtained in step 1), obtain moisture content less than 40%
Material；
3) dry and pelletizing: to resulting material in step 2), being dried using high-temperature gas, obtains the object that moisture is suitble to pelletizing
Powder additive is added in material, carries out pelletizing and sieves, screenings returns to pelletizing operation, and oversize is the pelletizing of qualified grain size
Mine.
2. the preparation method of laterite nickel ore pellets according to claim 1, which is characterized in that qualified in the step 1)
The moisture content of fine fraction ore pulp is greater than 50%.
3. the preparation method of laterite nickel ore pellets according to claim 1, which is characterized in that removing in the step 2)
Water return step 1) first segment grinding machine and classifying equipoment.
4. the preparation method of laterite nickel ore pellets according to claim 1, which is characterized in that be suitble in the step 3)
The moisture content of the material of pelletizing is 5~10%.
5. the preparation method of laterite nickel ore pellets described in any one of -4 according to claim 1, which is characterized in that the step
It is rapid 1) in first segment grinding machine be autogenous tumbling mill or semi-autogenous mill, classifying equipoment A be single-deck vibrating screen, drum sieve or double-deck screen shale shaker in
One kind；Second segment grinding machine is ball mill, and classifying equipoment B is one or both of cyclone, spiral classifier, vibrating screen group
It closes；Broken greater than the material of 10mm uses gyratory crusher.
6. the preparation method of laterite nickel ore pellets described in any one of -4 according to claim 1, which is characterized in that the step
Rapid 2) middle concentration and dehydration equipment are concentrator, filter press, band filter, ceramic filter, horizontal type screw settling centrifuge
One or more of.
7. the preparation method of laterite nickel ore pellets according to any one of claim 1-3, which is characterized in that the step
It is rapid 3) in drying equipment be one or more of roller drier, boiling drier, fluid bed dryer；The step 3)
In balling equipment be disc balling machine or ball press, sphere diameter be 5~50mm.
8. the preparation method of laterite nickel ore pellets described in any one of -4 according to claim 1, which is characterized in that the step
It is rapid 3) in additive include reducing agent, chlorinating agent and roasting auxiliary agent, the reducing agent be coke powder or coal dust, the chlorinating agent is
One or more of sodium chloride, potassium chloride, calcium chloride or magnesium chloride.
9. the preparation method of laterite nickel ore pellets according to claim 8, which is characterized in that the chlorinating agent is from red
It recycles and obtains in the indirect roasting process in native nickel ore pellet mine later period.
10. the preparation method of laterite nickel ore pellets described in any one of -4 according to claim 1, which is characterized in that described
The pellet of qualified grain size obtained in step 3) is used for the compound roasting procedure extraction nickel and cobalt in later period.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910319087.1A CN110055405A (en) | 2019-04-19 | 2019-04-19 | A kind of preparation method of laterite nickel ore pellets |
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| CN201910319087.1A CN110055405A (en) | 2019-04-19 | 2019-04-19 | A kind of preparation method of laterite nickel ore pellets |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112517235A (en) * | 2020-11-23 | 2021-03-19 | 连云港金红矿业有限公司 | Method for improving comprehensive utilization of durite tailings |
| CN115501961A (en) * | 2022-07-31 | 2022-12-23 | 秦国防 | Full autogenous grinding system and method capable of achieving yield quickly |
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|---|---|---|---|---|
| US3849113A (en) * | 1973-06-12 | 1974-11-19 | Mcdowell Wellman Eng Co | Process for the production of crude ferronickel |
| FR2777022A1 (en) * | 1998-04-06 | 1999-10-08 | Billiton Sa Limited | Beneficiation of nickel-containing laterite for ferronickel production |
| CN101643858A (en) * | 2009-06-22 | 2010-02-10 | 云南锡业集团（控股）有限责任公司 | High temperature chlorination processing method of lateritic nickel ore |
| CN102367512A (en) * | 2011-09-07 | 2012-03-07 | 王号德 | Method for deep reduction and magnetic separation of nickel and iron in lateritic nickel ore carbon-containing pellets |
| 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 |
| CN107937731A (en) * | 2017-12-04 | 2018-04-20 | 偏关县晋电化工有限责任公司 | A kind of lateritic nickel ore preprocess method and device |
| CN109097562A (en) * | 2018-07-18 | 2018-12-28 | 中南大学 | A kind of method of lateritic nickel ore selectivity sulfidation roasting |
| CN109355492A (en) * | 2018-11-08 | 2019-02-19 | 昆明理工大学 | A method of dilval is prepared using low-grade laterite nickel ore |
-
2019
- 2019-04-19 CN CN201910319087.1A patent/CN110055405A/en active Pending
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| US3849113A (en) * | 1973-06-12 | 1974-11-19 | Mcdowell Wellman Eng Co | Process for the production of crude ferronickel |
| FR2777022A1 (en) * | 1998-04-06 | 1999-10-08 | Billiton Sa Limited | Beneficiation of nickel-containing laterite for ferronickel production |
| CN101643858A (en) * | 2009-06-22 | 2010-02-10 | 云南锡业集团（控股）有限责任公司 | High temperature chlorination processing method of lateritic nickel ore |
| CN102367512A (en) * | 2011-09-07 | 2012-03-07 | 王号德 | Method for deep reduction and magnetic separation of nickel and iron in lateritic nickel ore carbon-containing pellets |
| 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 |
| CN107937731A (en) * | 2017-12-04 | 2018-04-20 | 偏关县晋电化工有限责任公司 | A kind of lateritic nickel ore preprocess method and device |
| CN109097562A (en) * | 2018-07-18 | 2018-12-28 | 中南大学 | A kind of method of lateritic nickel ore selectivity sulfidation roasting |
| CN109355492A (en) * | 2018-11-08 | 2019-02-19 | 昆明理工大学 | A method of dilval is prepared using low-grade laterite nickel ore |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112517235A (en) * | 2020-11-23 | 2021-03-19 | 连云港金红矿业有限公司 | Method for improving comprehensive utilization of durite tailings |
| CN112517235B (en) * | 2020-11-23 | 2022-09-27 | 江苏金红新材料股份有限公司 | Method for improving comprehensive utilization of durite tailings |
| CN115501961A (en) * | 2022-07-31 | 2022-12-23 | 秦国防 | Full autogenous grinding system and method capable of achieving yield quickly |
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