CN102776357A - Method for processing lateritic nickel ore by microwave-ammonia leaching - Google Patents
Method for processing lateritic nickel ore by microwave-ammonia leaching Download PDFInfo
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- CN102776357A CN102776357A CN2012102162124A CN201210216212A CN102776357A CN 102776357 A CN102776357 A CN 102776357A CN 2012102162124 A CN2012102162124 A CN 2012102162124A CN 201210216212 A CN201210216212 A CN 201210216212A CN 102776357 A CN102776357 A CN 102776357A
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Abstract
本发明涉及一种微波-氨浸技术处理红土镍矿的方法，具体的过程为配料-混料-造球-干燥-微波加热-冷却-氨浸-过滤。在该工艺中，红土镍矿与碳源及添加剂混合，利用微波加热还原，微波还原产物再经氨浸，提取镍。该方法具有加热速度快，还原效率高以及氨浸提镍具有良好的选择性等优点。The invention relates to a microwave-ammonia leaching method for treating laterite nickel ore. The specific process is batching-mixing-pelletizing-drying-microwave heating-cooling-ammonia leaching-filtering. In this process, the laterite nickel ore is mixed with carbon sources and additives, and then heated and reduced by microwaves, and the microwave reduced products are then leached with ammonia to extract nickel. The method has the advantages of fast heating speed, high reduction efficiency, good selectivity for ammonia leaching nickel, and the like.
Description
Technical field
The present invention relates to the non-ferrous metallurgy technology field, be specifically related to provide microwave-ammonia soaking technology to handle the method for red soil nickel ore.
Background technology
Nickel is a kind of hard, tough, forgeable silvery white metal, and nickel is widely used in industrial every field as structured material and functional materials in the modern society.
The mineral of nickel mainly comprise two kinds of sulfide type mineral and oxidized form mineral.There is tangible interface owing to different intercrystallines in the sulfide type mineral; Be easy to be broken into gangue particle and dissociated sulfide mineral particle; Can valuable mineral dissociated out from ore according to particulate surface property and particulate magneticinduction discards gangue, and the part of separating that contains a large amount of valuable minerals is become concentrate by enrichment.Different with sulphide ores, the valuable mineral of the oxidized form mineral of nickel is similar with the remaining valence link characteristic in gangue quartz mineral interface, causes the flotation agent poor selectivity, adopts the method concentration and separation difficulty of ore dressing, and the recovery is low; Further limit its development and use because basic gangue content is high and the valuable metal occurrence status is complicated again, the refining nickel output that makes reserves account for the red soil nickel ore production of nickel total reserves more than 60% only accounts for about 23% of ultimate production.But such mineral of nickel have reserves big, be easy to advantage such as exploitation, therefore, along with the growing tension of nickel resources, the utilization of red soil nickel ore becomes current research focus gradually.
The existing method of handling red soil nickel ore comprises wet method and pyrogenic process, and two kinds of methods comprise the different processes route again.Wherein wet method mainly contains: normal pressure pickling process, pressure pickling process, biological lixiviation process.The advantage of wet method is that the recovery and the purity of nickel is all higher, and shortcoming is a long flow path, complex equipments.The existing pyrometallurgical smelting method of red soil nickel ore comprises: retailoring ferronickel technology-small furnace technology, matte smelting technology, rotary kiln-eaf process.Its advantage is that flow process is short, but because the nickel content in the red soil nickel ore is generally lower, so mass energy consumption is being melted on the slag in the traditional technology.
Summary of the invention
The present situation of and highly energy-consuming low to efficient in the existing red soil nickel ore smelting process the invention provides the method that a kind of microwave-ammonia soaks the technical finesse red soil nickel ore.
Main flow process of the present invention is: ball-drying---microwave heating-cooling-ammonia soaks-filters for batching-batch mixing-make.This method may further comprise the steps:
(1), it is subsequent use less than 1mm red soil nickel ore to be ground to granularity;
(2), the red soil nickel ore that step (1) is prepared compares uniform mixing with carbonaceous reducing agent, additive by certain mass.Wherein the quality of carbonaceous reducing agent is 1～20% of a red soil nickel ore quality, and the additive quality is 0～50% of a red soil nickel ore quality;
(3), raw material thorough mixing that step (2) is prepared is even, process behind the pelletizing at 120 ℃ of following drying and dehydratings;
(4), place microwave equipment to add thermal reduction the dry pelletizing of step (3) gained, be 1～120min heat-up time
(5), with step (4) gained reduzate cooling, broken back by liquid-solid ratio 1～5: 1 ratio places the leaching plant that contains ammonia solution, ammonia leaching 0.5～3h under room temperature～90 ℃, bubbling air condition;
(6), step (5) gained solution is filtered; Obtain nickeliferous ammonia solution and filter residue; Ammonia solution continues on for using in the step (4), reaches 0.5～12.0g/L until the concentration of nickel and obtains the nickel strong solution, carries nickel with extraction process; Perhaps extract the nickel in the nickel strong solution with the sulphide precipitation deposition, the solution behind raffinate and the removal nickelous sulfide all can and replenish suitable ammonia and ammonium salt through adjustment be used further to step (4); Filter residue is used to carry iron as iron-smelting raw material.
Carbonaceous reducing agent in the step according to the invention (2) comprises various carbon raw materials such as gac, brown coal, bituminous coal, hard coal, charcoal, coke, graphite, carbon dust.Additive comprises wilkinite, Wingdale, peridotites, rhombspar, lime carbonate, magnesiumcarbonate and self-control composite additive.
Microwave equipment comprises intermittent type industrial microwave oven or continous way industrial microwave oven or microwave fluidized-bed in the step according to the invention (4).
Ammonia solution is ammoniacal liquor and ammonia chloride or sulfate of ammoniac or volatile salt liquid mixture prepared in the step according to the invention (5), and total ammonia amount is at 2～6mol/L, and the mol ratio of ammonia and ammonium salt is 1～10: 1; Leaching plant comprises ball milling leaching plant or high pressure leaching plant or normal pressure leaching plant.
The invention has the advantages that the fast efficient of microwave reduction and the efficient and selectivity that ammonia soaks, leached mud can be used as iron-smelting raw material, and ammonia solution can repeatedly recycle, and greatly reduces the discharging of waste liquid and waste residue, has good economic benefits and social benefit.
Embodiment
Embodiment 1
Raw material is certain nickel laterite, consists of: Ni:0.9%, Fe
2O
346.1%, MgO:12.6%, SiO
2: 10.1%.
Nickel laterite is ground to below the 45 μ m, itself and gac and quicklime are pressed 1: 01: 0.1 uniform mixing of mass ratio after, process pelletizing; Dry 24h under 120 ℃; Place intermittent type microwave equipment to add thermal reduction 10min group behind the dry ball, reduzate places the ball-grinding machine that contains ammonia solution in 2: 1 ratio of liquid-solid ratio after being cooled to room temperature, and at room temperature ball milling leaches 1h; Filter; Filtrating turns back in the extract technology continues to use, and reaches 6g/L until the concentration of nickel, adopts extraction process to extract nickel.
Embodiment 2
Raw material is certain nickel laterite, consists of: Ni:1.6%, Fe2O3 31.1%, MgO:15.6%, SiO2:33.5%..
Nickel laterite is ground to below the 75 μ m, itself and gac and rhombspar are pressed 1: 015: 0.2 uniform mixing of mass ratio after, process pelletizing; Dry 24h under 120 ℃; Place continuous-type microwave equipment to add thermal reduction 30min group behind the dry ball, grog places the normal pressure that contains ammonia solution to leach still in 5: 1 ratio of liquid-solid ratio, under room temperature and bubbling air flow velocity 10L/min condition, leaches 1.5h; Filter; Filtrating turns back in the extract technology continues to use, and reaches 10g/L until the concentration of nickel, adopts sulphide precipitation to extract nickel.
Claims (4)
1. method that microwave-ammonia soaks the technical finesse red soil nickel ore is characterized in that may further comprise the steps:
(1), it is subsequent use less than 1mm red soil nickel ore to be ground to granularity;
(2), the red soil nickel ore that step (1) is prepared compares uniform mixing with carbonaceous reducing agent, additive by certain mass.Wherein the quality of carbonaceous reducing agent is 1～20% of a red soil nickel ore quality, and the additive quality is 0～50% of a red soil nickel ore quality;
(3), raw material thorough mixing that step (2) is prepared is even, process behind the pelletizing at 120 ℃ of following drying and dehydratings;
(4), place microwave equipment to add thermal reduction the dry pelletizing of step (3) gained, be 1～120min heat-up time;
(5), with step (4) gained reduzate cooling, broken back by liquid-solid ratio 1～5: 1 ratio places the leaching plant that contains ammonia solution, ammonia leaching 0.5～3h under room temperature～90 ℃ and bubbling air condition;
(6), step (5) gained solution is filtered, obtain nickeliferous ammonia solution and filter residue, ammonia solution continues on for using in the step (4), reaches 0.5～12.0g/L until the concentration of nickel and obtains the nickel strong solution.
2. microwave-ammonia according to claim 1 soaks the method for technical finesse red soil nickel ore, it is characterized in that: the reductive agent of use comprises carbon raw materials such as gac, brown coal, bituminous coal, hard coal, charcoal, coke, graphite, carbon dust.Additive comprises wilkinite, Wingdale, peridotites, rhombspar, lime carbonate, magnesiumcarbonate and self-control composite additive.
3. microwave-ammonia according to claim 1 soaks the method for technical finesse red soil nickel ore, it is characterized in that: microwave equipment comprises intermittent type industrial microwave oven or continous way industrial microwave oven or microwave fluidized-bed.
4. microwave-ammonia according to claim 1 soaks the method for technical finesse red soil nickel ore; It is characterized in that: ammonia solution is ammoniacal liquor and ammonia chloride or sulfate of ammoniac or volatile salt liquid mixture prepared; Total ammonia amount is at 2～6mol/L, and the mol ratio of ammonia and ammonium salt is 1～10: 1; Leaching plant comprises ball milling leaching plant or high pressure leaching plant or normal pressure leaching plant.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102162124A CN102776357A (en) | 2012-06-28 | 2012-06-28 | Method for processing lateritic nickel ore by microwave-ammonia leaching |
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| CN2012102162124A CN102776357A (en) | 2012-06-28 | 2012-06-28 | Method for processing lateritic nickel ore by microwave-ammonia leaching |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104014307A (en) * | 2014-05-30 | 2014-09-03 | 石河子大学 | Microwave heating modifying method capable of enhancing basic groups on surface of active carbon |
| CN112723428A (en) * | 2020-12-18 | 2021-04-30 | 湖南德景源科技有限公司 | Method for preparing battery-grade nickel oxide by using metallic nickel |
| CN112941313A (en) * | 2021-01-29 | 2021-06-11 | 广东邦普循环科技有限公司 | Recovery method and application of rough ferronickel alloy |
| CN114318005A (en) * | 2022-01-04 | 2022-04-12 | 中南大学 | Method for preparing high-grade nickel product by treating low-grade laterite-nickel ore with microwave |
| CN114540613A (en) * | 2020-11-27 | 2022-05-27 | 北京博萃循环科技有限公司 | Method for separating nickel and cobalt from laterite-nickel ore |
| CN115821041A (en) * | 2022-09-01 | 2023-03-21 | 广东邦普循环科技有限公司 | Method for recovering nickel |
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| US3388870A (en) * | 1965-04-07 | 1968-06-18 | Int Nickel Co | Upgrading of lateritic ores |
| US3788841A (en) * | 1971-09-28 | 1974-01-29 | Kennecott Copper Corp | Recovery of metal values from manganese nodules |
| US4311520A (en) * | 1980-02-28 | 1982-01-19 | Cato Research Corporation | Process for the recovery of nickel, cobalt and manganese from their oxides and silicates |
| WO2004101832A2 (en) * | 2003-05-08 | 2004-11-25 | Belle Watkins Mines, Inc. | Microwave enhancement of the segregation roast |
| CN101230422A (en) * | 2008-02-02 | 2008-07-30 | 贵研铂业股份有限公司 | Method for enriching nickel from lateritic nickel with co-production of iron-oxide red |
| CN101323909A (en) * | 2008-07-17 | 2008-12-17 | 东北大学 | A method of microwave selective reduction roasting-dilute acid leaching nickel oxide ore |
| CN101575676A (en) * | 2009-06-18 | 2009-11-11 | 中南大学 | Method for removing iron and enriching nickel cobalt through precipitation of laterite type nickel ores |
| CN101956081A (en) * | 2010-09-10 | 2011-01-26 | 平安鑫海资源开发有限公司 | Process for strengthening ammonia leaching nickel cobalt from low-grade laterite-nickel ore |
| CN102051471A (en) * | 2011-01-30 | 2011-05-11 | 湖南隆达微波冶金有限公司 | Method for processing enrichment of laterite-nickel ore in form of ferronickel by microwave |
-
2012
- 2012-06-28 CN CN2012102162124A patent/CN102776357A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3388870A (en) * | 1965-04-07 | 1968-06-18 | Int Nickel Co | Upgrading of lateritic ores |
| US3788841A (en) * | 1971-09-28 | 1974-01-29 | Kennecott Copper Corp | Recovery of metal values from manganese nodules |
| US4311520A (en) * | 1980-02-28 | 1982-01-19 | Cato Research Corporation | Process for the recovery of nickel, cobalt and manganese from their oxides and silicates |
| WO2004101832A2 (en) * | 2003-05-08 | 2004-11-25 | Belle Watkins Mines, Inc. | Microwave enhancement of the segregation roast |
| WO2004101832A3 (en) * | 2003-05-08 | 2005-11-10 | Belle Watkins Mines Inc | Microwave enhancement of the segregation roast |
| CN101230422A (en) * | 2008-02-02 | 2008-07-30 | 贵研铂业股份有限公司 | Method for enriching nickel from lateritic nickel with co-production of iron-oxide red |
| CN101323909A (en) * | 2008-07-17 | 2008-12-17 | 东北大学 | A method of microwave selective reduction roasting-dilute acid leaching nickel oxide ore |
| CN101575676A (en) * | 2009-06-18 | 2009-11-11 | 中南大学 | Method for removing iron and enriching nickel cobalt through precipitation of laterite type nickel ores |
| CN101956081A (en) * | 2010-09-10 | 2011-01-26 | 平安鑫海资源开发有限公司 | Process for strengthening ammonia leaching nickel cobalt from low-grade laterite-nickel ore |
| CN102051471A (en) * | 2011-01-30 | 2011-05-11 | 湖南隆达微波冶金有限公司 | Method for processing enrichment of laterite-nickel ore in form of ferronickel by microwave |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104014307A (en) * | 2014-05-30 | 2014-09-03 | 石河子大学 | Microwave heating modifying method capable of enhancing basic groups on surface of active carbon |
| CN114540613A (en) * | 2020-11-27 | 2022-05-27 | 北京博萃循环科技有限公司 | Method for separating nickel and cobalt from laterite-nickel ore |
| CN112723428A (en) * | 2020-12-18 | 2021-04-30 | 湖南德景源科技有限公司 | Method for preparing battery-grade nickel oxide by using metallic nickel |
| CN112941313A (en) * | 2021-01-29 | 2021-06-11 | 广东邦普循环科技有限公司 | Recovery method and application of rough ferronickel alloy |
| CN114318005A (en) * | 2022-01-04 | 2022-04-12 | 中南大学 | Method for preparing high-grade nickel product by treating low-grade laterite-nickel ore with microwave |
| CN114318005B (en) * | 2022-01-04 | 2022-11-29 | 中南大学 | Method for preparing high-grade nickel product by treating low-grade laterite-nickel ore with microwave |
| CN115821041A (en) * | 2022-09-01 | 2023-03-21 | 广东邦普循环科技有限公司 | Method for recovering nickel |
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Application publication date: 20121114 |