CN105755283A - Method for selectively leaching valuable metals in laterite-nickel ore by aid of chloride - Google Patents
Method for selectively leaching valuable metals in laterite-nickel ore by aid of chloride Download PDFInfo
- Publication number
- CN105755283A CN105755283A CN201610130725.1A CN201610130725A CN105755283A CN 105755283 A CN105755283 A CN 105755283A CN 201610130725 A CN201610130725 A CN 201610130725A CN 105755283 A CN105755283 A CN 105755283A
- Authority
- CN
- China
- Prior art keywords
- leaching
- hydrochloric acid
- ore
- nickel
- villaumite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/12—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions
- C22B3/14—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions containing ammonia or ammonium salts
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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
- C22B23/04—Obtaining nickel or cobalt by wet processes
- C22B23/0407—Leaching processes
- C22B23/0446—Leaching processes with an ammoniacal liquor or with a hydroxide of an alkali or alkaline-earth metal
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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
- C22B47/00—Obtaining manganese
Abstract
The invention relates to the field of wet metallurgy on nonferrous metal, in particular to a method for extracting nickel, cobalt and manganese from laterite-nickel ore.The method includes steps of crushing, grinding and sieving ore samples to obtain ore samples with the granularity of 0.074-0.15 mm under the control; dissolving chloride in hydrochloric acid to obtain hydrochloric acid and chloride solution; directly leaching the laterite-nickel ore by the aid of the hydrochloric acid and chloride solution, controlling the leaching temperatures and the leaching time, and filling the laterite-nickel ore with oxidizing gas from the bottom to enhance leaching of valuable metals and restrain leaching of contaminating metals.The method has the advantages that nickel and the cobalt which are the valuable metals can be leached, leaching of iron can be restrained, and accordingly loss of the nickel and the cobalt due to precipitates generated by the iron in leach liquor in follow-up working procedures can be prevented; the nickel leaching rate can reach 83% at least, the cobalt leaching rate can reach 72% at least, the manganese leaching rate can reach 89% at least, but the iron leaching rate is only 11-19%, and accordingly leaching of the iron can be reduced to a great extent.
Description
Technical field
The present invention relates to non-ferrous metal field of hydrometallurgy, particularly to a kind of method extracting nickel, cobalt, manganese from lateritic nickel ore.
Background technology
Nickel, cobalt and manganese are important strategic reserves metals, are widely used in the aspect such as doping and metallic catalyst of alloy, particularly with the catalyst being used as hydrogenation.Nickel is mainly used to manufacture rustless steel and other corrosion-resistant materials in alloy, and the alloy that nickeliferous composition is higher, resistance to corrosion can be more strong.Cobalt and manganese are widely used in the aspect such as high temperature alloy and high-performance special alloy, energy storage material, magnetic material, electromagnetic shielding material, communication apparatus and battery.Due in the world 72% nickel resources deposit both be from lateritic nickel ore, and low-grade laterite nickel ore can not be enriched with significantly, so being not suitable for adopting pyrometallurgical smelting, even if leaching will also result in a large amount of energy consumption again after processing by reduction roasting.And ferrum and other impurity metal content are higher in the leachate that traditional wet method acid immersion process obtains, add the workload that later purification purifies.These shortcomings cause that the economic serviceability of related process is poor.
Summary of the invention
It is an object of the invention to provide a kind of method of valuable metal in villaumite Selectively leaching lateritic nickel ore, it is possible to be used for processing low-grade laterite nickel ore (nickeliferous below 1.3%).Its maximum advantage is just that of avoiding the firing stage in pyrometallurgical processes, reduces cost of investment and energy consumption, it also avoid high concentrated acid to problems such as the corrosion of equipment simultaneously.Adding villaumite in hydrochloric acid solution to be possible not only to strengthen hydrogen ion activity and increase the solvability of solution, and chloride ion has good depolarization and eliminates the effect of passivation, the process that solution leaches mineral is highly beneficial.The oxidizing gas passed in leaching process can the foreign metal such as ferrum oxide, suppress the leaching of ferrum while destroying ore deposit phase.
Technical scheme:
A kind of method of valuable metal in villaumite Selectively leaching lateritic nickel ore, comprises the following steps:
A, being sieved by sample ore crushing grinding, the Task-size Controlling of sample ore is at 0.074～0.15mm；
B, villaumite is dissolved in hydrochloric acid, is configured to hydrochloric acid chloride solution；
C, employing hydrochloric acid chloride solution directly leach lateritic nickel ore, control extraction temperature and extraction time, pass into oxidizing gas from bottom to strengthen the leaching of valuable metal and to suppress the leaching of foreign metal simultaneously；
Villaumite described in step B is ammonium chloride, and concentration of hydrochloric acid is 1～4mol/L, and villaumite concentration is 1～4mol/L；
Extraction temperature described in step C controls at 80～100 DEG C, and extraction time controls at 60～120min, for ensureing that in lateritic nickel ore, valuable metal reacts completely, and is defined as 1:4～6 by the solid-to-liquid ratio (mass volume ratio: g:mL) of ore pulp；
The oxidizing gas passed in step C is the one in air, oxygen or ozone, and the flow passed into is 0.5～1.5L/h.
The present invention adopts the direct leaching-out technique of villaumite to process low-grade lateritic nickel ore, it is achieved that the Selectively leaching of the valuable metal such as nickel, cobalt.By passing into certain oxidizing gas, control certain extraction temperature and extraction time, it is possible to while leaching valuable metal nickel, cobalt, suppress the leaching of ferrum, it is prevented that in subsequent handling, the ferrum in leachate generates precipitation and causes the loss of nickel cobalt.Present invention can ensure that nickel leaching rate reaches more than 83%, the leaching rate of cobalt reaches more than 72%, and the leaching rate of manganese reaches more than 89%, and the leaching rate of ferrum only has 11 19%, compared with other wet-leaching techniques, largely reduces the leaching of ferrum.
Compared with prior art, adopt villaumite and dilute hydrochloric acid solution and combine and pass into oxidizing gas and can realize valuable metal in Selectively leaching lateritic nickel ore, the nickel of the present invention, cobalt, manganese yield height, raw material adapts to strong, technique is simple, it is not necessary to high-temperature roasting device, and investment risk is extremely low；Do not need the leaching of high concentrated acid, the corrosion of material is low, hydrochloric acid recoverable, environmental effect is few.The exploitation that the present invention is low-grade laterite nickel ore provide the approach that extremely efficient and cost-effective is practical.
Detailed description of the invention
The present invention adopts to join villaumite and is made into villaumite hydrochloric acid solution in dilute hydrochloric acid solution, the valuable metal in Selectively leaching lateritic nickel ore in the process pass into oxidizing gas.
First, villaumite is dissolved in certain density hydrochloric acid solution, is configured to certain density villaumite hydrochloric acid solution.Then at a certain temperature villaumite hydrochloric acid solution is mixed with laterite and size mixing, control certain extraction time and be continually fed into oxidizing gas and make valuable metal be completely dissolved and the leaching that suppresses the foreign metal such as ferrum, magnesium.
Being below the section Example of the present invention, providing of these embodiments is the further description to the present invention, and does not mean that limitation of the present invention (solid-to-liquid ratio of ore pulp is mass volume ratio: g:mL).
Embodiment 1
It is that (the concentration 2mol/L of hydrochloric acid in the hydrochloric acid solution of 2mol/L ammonium chloride put into by 0.15mm lateritic nickel ore mineral aggregate by 20g granularity, the solid-to-liquid ratio of ore pulp is 1:4), air 1.5L/h is passed into from bottom, extraction temperature is 90 DEG C, after leaching 60min, sucking filtration carries out solid-liquid separation while hot, then measures Ni, Co, Mn, Fe leaching rate in leachate.By conditions above control, in low-grade laterite nickel ore, the leaching rate of nickel reaches 87%, and the leaching rate of cobalt reaches 75%, and the leaching rate of manganese reaches 90%.And the leaching rate of ferrum only has 19%, significantly reduce the treating capacity of subsequent purification remove impurity operation.
Embodiment 2
It is that (the concentration 1mol/L of hydrochloric acid in the hydrochloric acid solution of 1mol/L ammonium chloride put into by 0.074mm lateritic nickel ore mineral aggregate by 20g granularity, the solid-to-liquid ratio of ore pulp is 1:5), oxygen 1L/h is passed into from bottom, extraction temperature 100 DEG C, extraction time is 90min, sucking filtration while hot, then measures Ni, Co, Mn, Fe leaching rate in leachate.By conditions above control, in low-grade laterite nickel ore, the leaching rate of nickel reaches 83%, and the leaching rate of cobalt reaches 72%, and the leaching rate of manganese reaches 89%.And the leaching rate of ferrum only has 17%, significantly reduce the treating capacity of subsequent purification remove impurity operation.
Embodiment 3
It is that (the concentration 4mol/L of hydrochloric acid in the hydrochloric acid solution of 4mol/L ammonium chloride put into by 0.15mm lateritic nickel ore mineral aggregate by 20g granularity, the solid-to-liquid ratio of ore pulp is 1:6), ozone 0.5L/h is passed into from bottom, extraction temperature is 90 DEG C, leach after 120min sucking filtration while hot, carrying out solid-liquid separation, gained solution is leachate.By conditions above control, in low-grade laterite nickel ore, the leaching rate of nickel reaches 93%, and the leaching rate of cobalt reaches 83%, and the leaching rate of manganese reaches 91%.And the leaching rate of ferrum only has 11%, significantly reduce the treating capacity of subsequent purification remove impurity operation.
Claims (3)
1. a method for valuable metal in villaumite Selectively leaching lateritic nickel ore, is characterized in that: comprise the following steps:
A, being sieved by sample ore crushing grinding, the Task-size Controlling of sample ore is at 0.074～0.15mm；
B, villaumite is dissolved in hydrochloric acid, is configured to hydrochloric acid chloride solution；
C, employing hydrochloric acid chloride solution directly leach lateritic nickel ore, control extraction temperature and extraction time, pass into oxidizing gas from bottom to strengthen the leaching of valuable metal and to suppress the leaching of foreign metal simultaneously；
Villaumite described in step B is ammonium chloride, and concentration of hydrochloric acid is 1～4mol/L, and villaumite concentration is 1～4mol/L；
Extraction temperature described in step C controls at 80～100 DEG C, and extraction time controls at 60～120min, and the solid-to-liquid ratio of ore pulp is defined as 1:4～6, unit g:mL.
2. the method for valuable metal in a kind of villaumite Selectively leaching lateritic nickel ore according to claim 1, is characterized in that: the oxidizing gas passed in step C is the one in air, oxygen or ozone, and passing into flow is 0.5～1.5L/h.
3. the method for valuable metal in a kind of villaumite Selectively leaching lateritic nickel ore according to claim 1, it is characterized in that: be embodied as: be in the hydrochloric acid solution that 4mol/L ammonium chloride put into by 0.15mm lateritic nickel ore mineral aggregate by 20g granularity, wherein the concentration of hydrochloric acid is 4mol/L, the solid-to-liquid ratio of ore pulp is 1:6, unit g:mL；Pass into ozone 0.5L/h from bottom, extraction temperature is 90 DEG C, leaches after 120min sucking filtration while hot, carries out solid-liquid separation, and gained solution is leachate；By conditions above control, in low-grade laterite nickel ore, the leaching rate of nickel reaches 93%, and the leaching rate of cobalt reaches 83%, and the leaching rate of manganese reaches 91%, and the leaching rate of ferrum only has 11%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610130725.1A CN105755283B (en) | 2016-03-08 | 2016-03-08 | The method of valuable metal in villaumite Selectively leaching lateritic nickel ore |
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| CN201610130725.1A CN105755283B (en) | 2016-03-08 | 2016-03-08 | The method of valuable metal in villaumite Selectively leaching lateritic nickel ore |
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| CN105755283A true CN105755283A (en) | 2016-07-13 |
| CN105755283B CN105755283B (en) | 2017-09-12 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106086468A (en) * | 2016-08-09 | 2016-11-09 | 江苏省冶金设计院有限公司 | A kind of method and system utilizing ferronickel powder to extract nickel oxide |
| CN106086467A (en) * | 2016-08-09 | 2016-11-09 | 江苏省冶金设计院有限公司 | A kind of method and system utilizing lateritic nickel ore to extract nickel oxide |
| CN106119573A (en) * | 2016-08-09 | 2016-11-16 | 江苏省冶金设计院有限公司 | A kind of method and system utilizing lateritic nickel ore to extract nickel oxide |
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| EP0924307B1 (en) * | 1995-06-07 | 2003-01-29 | Cominco Engineering Services Ltd. | Solvent extraction of cobalt and nickel values from a magnesium containing solution |
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| CN103882222A (en) * | 2014-04-16 | 2014-06-25 | 江西理工大学 | Method for extracting nickel and cobalt from nickel laterite by chloride roasting |
-
2016
- 2016-03-08 CN CN201610130725.1A patent/CN105755283B/en active Active
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| EP0924307B1 (en) * | 1995-06-07 | 2003-01-29 | Cominco Engineering Services Ltd. | Solvent extraction of cobalt and nickel values from a magnesium containing solution |
| CN1511962A (en) * | 2002-12-31 | 2004-07-14 | 熊尚彬 | Compound leaching agent and leaching method for leaching out copper pyrite using compound leaching agent |
| CN1800422A (en) * | 2005-12-13 | 2006-07-12 | 浙江盈联科技有限公司 | Method for processing cobalt copper alloy |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106086468A (en) * | 2016-08-09 | 2016-11-09 | 江苏省冶金设计院有限公司 | A kind of method and system utilizing ferronickel powder to extract nickel oxide |
| CN106086467A (en) * | 2016-08-09 | 2016-11-09 | 江苏省冶金设计院有限公司 | A kind of method and system utilizing lateritic nickel ore to extract nickel oxide |
| CN106119573A (en) * | 2016-08-09 | 2016-11-16 | 江苏省冶金设计院有限公司 | A kind of method and system utilizing lateritic nickel ore to extract nickel oxide |
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| CN105755283B (en) | 2017-09-12 |
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Effective date of registration: 20180913 Address after: 430223 East Lake New Technology Development Zone, Wuhan, Hubei, A11-496 1, 1 SBI, Pioneer Street, Optics Valley. Patentee after: Wuhan solid technology partnership (limited partnership) Address before: No. 86, Hongqi Avenue, Ganzhou, Jiangxi Province Patentee before: Jiangxi University of Science and Technology |
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Effective date of registration: 20190227 Address after: 443200 Yichang City, Hubei province Zhijiang City Patentee after: Hubei Changchen Lithium Energy Circulation Technology Co., Ltd. Address before: 430223 East Lake New Technology Development Zone, Wuhan, Hubei, A11-496 1, 1 SBI, Pioneer Street, Optics Valley. Patentee before: Wuhan solid technology partnership (limited partnership) |