CN109439892A - The extracting method of valuable metal in a kind of cupro-nickel vulcanization type mineral - Google Patents
The extracting method of valuable metal in a kind of cupro-nickel vulcanization type mineral Download PDFInfo
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- CN109439892A CN109439892A CN201910030813.8A CN201910030813A CN109439892A CN 109439892 A CN109439892 A CN 109439892A CN 201910030813 A CN201910030813 A CN 201910030813A CN 109439892 A CN109439892 A CN 109439892A
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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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
- C22B1/08—Chloridising roasting
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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
- C22B11/00—Obtaining noble metals
- C22B11/04—Obtaining noble metals by wet processes
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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
- C22B15/00—Obtaining copper
- C22B15/0063—Hydrometallurgy
- C22B15/0065—Leaching or slurrying
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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
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The extracting method of valuable metal in a kind of cupro-nickel vulcanization type mineral of the invention, belong to nonferrous metallurgy field, step are as follows: will after the grinding of cupro-nickel vulcanization type mineral with chlorinating agent by certain mass than mixing after, be placed in closed shaft (tower) furnace, once roasted under oxidizing atmosphere or after baking.Gold, silver and the distillation of platinum group metal chloride are enriched with recycling after ammonia, hydrogen chloride and chlorine generated etc. condenses is reacted in roasting process.It roasts clinker to leach, filter through deionized water, obtains the solution of the valuable metals chloride such as cupric, nickel, cobalt, wherein the recovery rate of copper, nickel and cobalt is all larger than 80%.Iron ion content is less than 0.4mol/L in after baking leachate.This method realizes that the comprehensive of the valuable metals such as copper, nickel, cobalt is extracted at a lower temperature, and the rate of recovery is high, and the recovery rate of control impurity iron can be roasted by selectivity, realizes the enrichment of gold and silver and platinum group metal, simple process, low energy consumption.
Description
Technical field:
The invention belongs to non-ferrous metallurgy technology fields, and in particular to a kind of cupro-nickel vulcanization type mineral chloridising roasting-water
Extract the method for taking valuable metal, and in particular to the extracting method of valuable metal in a kind of cupro-nickel vulcanization type mineral.
Background technique:
World's continental rise nickel resources mainly include weathering type lateritic nickel ore and Magmatic Cu Ni sulphide mine two types.Due to sulphur
Change type nickel ore resource quality is good, mature technology, is the main resource for producing nickel product.In recent years, with world's nickel demand
Be continuously increased, minable high-grade vulcanization type nickel ore resource is increasingly depleted, low without new mineral resources support
Grade cupro-nickel vulcanization type nickel minerals has become the focus development object of nickel industry.
Low-grade copper nickel sulfide ore is composite ore band thicker between primary sulfide ore lean ore body and upper oxide band, association
A large amount of copper metal.This kind of mineral basic gangue content is high, and mineral phase structure is complicated, is carried out using existing nickel sulfide ore smelting process
The disadvantages of processing, it is high that there are energy consumptions, and recovery rate of valuable metals is low, and economic benefit is bad.Therefore it is badly in need of exploitation from cu-ni sulphide ore
The middle new method and new technology for extracting metal.
For the technique of preparing of the low-grade nickel sulfide ore in the area such as Jinchuan, Xinjiang, Yunnan, a large amount of scholars are from research new drug
Agent improves recovery rate in ore-dressing in terms of introducing new process and new equipment, increases concentrate grade, improves the rate of recovery of metal, but due to
The complexity of low-grade nickel sulfide ore the Nomenclature Composition and Structure of Complexes, the loss of the metals such as ore dressing process nickel, copper, cobalt are still that ore-dressing technique obtains
With the biggest problem overcome needed for application.
In terms of pyrometallurgical smelting, mainly from energy conservation and raising yield angle, USSR is developed low-grade nickel sulfide ore
After oxidation, at 900 DEG C with C and CaC12Or MgC12The technique for carrying out isolation roasting, the rate of recovery of Ni, Cu, Fe are respectively
82.5%, 73.8%, 6.1%.The problem that the rate of recovery of metal is low, energy consumption is higher constrains the hair of the technology to a certain extent
Exhibition and application.
Nitration mixture system, ammonia-ammonium salt system and the low product of Bioleaching are mainly had studied in terms of hydrometallurgy
Position cu-ni sulphide ore extracts metal, and acid system leaches and the rate of recovery of bioleaching process metal is higher, however basic gangue content
Height causes acid consumption larger, at high cost；Ammonia soaking technology metal recovery rate is low, low efficiency.
Summary of the invention:
The purpose of the present invention is overcoming above-mentioned the shortcomings of the prior art, it is difficult to be effectively treated in view of prior art process
In the case of low-grade cupro-nickel vulcanization type mineral and the failed industrial application of other process flows, a kind of cupro-nickel vulcanization type mine is provided
The extracting method of valuable metal in object realizes the high efficiente callback and comprehensive utilization of valuable metal in cupro-nickel vulcanization type mineral.
To achieve the above object, the invention adopts the following technical scheme:
The extracting method of valuable metal, includes the following steps: in a kind of cupro-nickel vulcanization type mineral
Step 1, material mixes:
After cupro-nickel vulcanization type mineral crushing grinding is formed miberal powder, it is uniformly mixed with chlorinating agent, wherein the miberal powder grain
Degree is less than 380 μm, and the chlorinating agent is (0.1~4) with miberal powder in mass ratio: 1 mixes；
Step 2, it roasts:
Material will be mixed to roast, generate roasting material, roasting clinker is obtained after cooling, wherein the roasting temperature
Degree is 100~950 DEG C, and calcining time is 0.5~4h, and calcination atmosphere is oxygen-containing 1~50% atmosphere；
Step 3, it leaches:
It is 1:(2~10 that clinker and water, which will be roasted, by solid-to-liquid ratio (solid masses and liquid volume ratio, unit g:ml)) it mixes
After conjunction, leaching, filtering obtains leachate and filter residue, completes to extract, wherein and the extraction temperature is 60~100 DEG C,
Extraction time is 0.5~4h.
In the step 1, cupro-nickel vulcanization type mineral are cupro-nickel vulcanization type nickel minerals or cupro-nickel vulcanization type nickel ore concentrate.
In the step (1), the major metal and its mass percentage that cupro-nickel vulcanization type mineral include, Ni≤
15%, Cu≤10%, Co 0~2%, TFe 10~50%, MgO≤40%, S10~40%, SiO2≤ 20%, remaining is micro
Al2O3, CaO etc., total amount≤15%.
In the step (1), chlorinating agent is mixture, ammonium chloride or the ferric chloride hexahydrate of sodium chloride and magnesium chloride
(FeCl3·6H2One of O).
In the step (1), when chlorinating agent is ammonium chloride, chlorinating agent and miberal powder are (0.5~4) in mass ratio: 1 is mixed
It closes；When chlorinating agent is ferric chloride hexahydrate, chlorinating agent is (0.1~4) with miberal powder in mass ratio: 1 is mixed；Chlorinating agent is sodium chloride
When with the mixture of magnesium chloride, chlorinating agent is (0.1~4) with miberal powder in mass ratio: 1 is mixed, and in mixture magnesium chloride matter
Measuring percentage composition is 1~100%.
In the step 2, when mixing the chlorinating agent in material is ammonium chloride, maturing temperature is 300~600 DEG C, roasting
The burning time is 0.5~4h；
When mixing the chlorinating agent in material is ferric chloride hexahydrate, maturing temperature is 100~300 DEG C, and calcining time is
0.5~4h；
When mixing the mixture that the chlorinating agent in material is sodium chloride and magnesium chloride, maturing temperature is 300~950 DEG C,
Calcining time is 0.5~4h.
In the step 2, mixing material is roasted after ball is made or roasting direct, the baking operation exist
It is carried out in closed shaft (tower) furnace, the lower end of shaft (tower) furnace connects device for recovering tail gas, and upper end connects gas access equipment.
In the step 2, in roasting process:
The cycling of elements such as copper, nickel, cobalt, magnesium, iron in cupro-nickel vulcanization type mineral are soluble metal chloride, cupro-nickel vulcanization
The precious metal elements such as gold, silver and platinum group metal in type mineral form corresponding precious metal chloride, while generating ammonia, chlorination
The gases such as hydrogen and chlorine；Realize that copper, nickel, the comprehensive of cobalt valuable metal are extracted.
In the step 2, in roasting process:
The precious metal chloride of generation is rich after device for recovering tail gas condenses with ammonia, hydrogen chloride and chlorine etc. through distilling
Collection recycling.
In the step 2, the type of cooling is furnace cooling.
In the step 2, chlorinating agent is cooked by ammonium chloride or ferric chloride hexahydrate and carries out roasting obtained roasting clinker
After baking is carried out, after baking material is obtained, after baking clinker is obtained after furnace cooling, then carries out the leaching behaviour of step 3
Make, specifically: after mixing after baking clinker by solid-to-liquid ratio with water, continue subsequent operation, wherein the after baking temperature
Degree is 300~600 DEG C, and the after baking time is 0.5~4h, and after baking atmosphere is oxygen-containing 10~50% atmosphere.
In the step 2, during after baking, the chloride for roasting the iron in clinker is converted into iron oxide, converts
Rate is greater than 90%.
In the step 3, leachate is the chloride solution for including the metals such as copper, nickel, magnesium, cobalt, iron, according to chlorinating agent
Choose the sulfate liquor for being also possible that iron, magnesium, sodium.
In the step 3, after the completion of leaching, the recovery rate of nickel, copper and cobalt is all larger than 80%, and iron ion contains in leachate
Amount is less than 0.4mol/L.
In the step 3, using ammonium chloride cook chlorinating agent by once roast or double roasting after, then leach, nickel and
The recovery rate of copper is all larger than 90%, and the recovery rate of cobalt is greater than 85%；Chlorinating agent is cooked by primary roasting using ferric chloride hexahydrate
Or after double roasting, then leach, for the recovery rate of nickel greater than 90%, the recovery rate of copper and cobalt is greater than 80%；Using sodium chloride and chlorine
Change magnesium compound and cook chlorinating agent after once roasting, then leach, the recovery rate of copper, nickel and cobalt is all larger than 80%.
In the method, chlorinating agent is cooked using ammonium chloride or ferric chloride hexahydrate, after once roasting, then is leached,
The leachate and filter residue of acquisition, iron ion content is greater than 0.4mol/L in leachate, after double roasting, then leaches, and obtains
Leachate and filter residue, iron ion content is less than 0.4mol/L in leachate；Chlorination is done using sodium chloride and magnesium chloride mixture
Agent is after once roasting, then leaches, the leachate and filter residue of acquisition, and iron ion content is less than 0.2mol/L in leachate.
It cooks chlorinating agent using ammonium chloride once to be roasted, chemical reaction (1)-as shown in Table 1 occurs for roasting process
(12)。
The chemical reaction that 1 ammonium chloride roasting process of table occurs
It cooks chlorinating agent using ferric chloride hexahydrate once to be roasted, metalliferous mineral occurs as shown in table 2 in roasting process
Chemical reaction (13)-(21) and table 1 shown in chemical reaction (7)-(12).
The chemical reaction that 2 ferric chloride hexahydrate roasting process of table occurs
It cooks chlorinating agent using sodium chloride and magnesium chloride mixture once to be roasted, metalliferous mineral occurs such as in roasting process
Chemical reaction (7)-shown in chemical reaction (19)-(23) shown in chemical reaction (24)-(29), table 2 shown in table 3 and table 1
(12)。
The chemical reaction that 3 sodium chloride of table and magnesium chloride mixture roasting process occur
The main chemical reactions equation that after baking process occurs are as follows:
FeCl3+O2(g)=Fe2O3+Cl2(g) (30)
Fe2(SO4)=Fe2O3+3SO3(g) (31)
Beneficial effects of the present invention:
Maturing temperature of the present invention is low, and low energy consumption；Copper, nickel, cobalt recovery rate it is high, it can be achieved that the synthetical recovery of valuable metal and
It utilizes；By control maturing temperature and atmosphere, impurity iron is made to be converted into iron oxide, realizes the pre-separation with copper, nickel, cobalt, magnesium,
Reduce the cost of valuable metal purification and impurity removal in subsequent solution；The gases such as ammonia and hydrogen chloride that chlorination process generates, through condensing
It can be achieved to recycle after recycling；The precious metal elements such as gold, silver and platinum group metal in miberal powder can be through distillation condensing recovery enrichment.
The strong applicability of present invention process, has a wide range of application, and ore raw materials is not limited by region, mine position, grade etc..
Detailed description of the invention:
Fig. 1 is that the technique stream of valuable metal is extracted in cupro-nickel vulcanization type mineral chloridising roasting-leaching of the embodiment of the present invention 1
Journey.
Specific embodiment:
Below with reference to embodiment, the present invention is described in further detail.
Embodiment 1
The extracting method of valuable metal in a kind of cupro-nickel vulcanization type mineral, process flow chart is as shown in Figure 1, include as follows
Step:
1) cupro-nickel vulcanization type nickel minerals is broken, grinding, screening process obtain the miberal powder that granularity is 75-80 μm, cupro-nickel vulcanization
The chemical composition of type nickel minerals is as shown in table 4.
The main metal element of 4 cupro-nickel vulcanization type nickel minerals of table forms and its mass percentage
2) it is uniform according to mass ratio 1:2 ground and mixed that 20g nickel minerals miberal powder and ammonium chloride are weighed.
3) mixed material is put into porcelain crucible, is placed on after capping in the shaft (tower) furnace containing 20% oxygen, with 15 DEG C/min
Rate rise to 500 DEG C of constant temperature 2.5h and complete roasting, furnace cooling obtains roasting clinker.
4) roasting clinker is placed in the shaft (tower) furnace containing 40% oxygen, in 450 DEG C of roasting temperature 2h, furnace cooling
Obtain after baking clinker.
5) after mixing after baking clinker by solid-to-liquid ratio 1:6 with deionized water, 40min is leached in 80 DEG C of mechanical stirrings,
Be obtained by filtration containing nickel, copper, iron, magnesium chloride leachate and filter residue.
6) content for measuring nickel, copper and iron in leachate, the recovery rate that nickel is calculated is 93.5%, and the recovery rate of copper is
95.7%, the concentration of iron is 0.024mol/L in leachate.
7) precious metal chloride that step 3) and step 4) roasting generate is passed through through distilling with ammonia, hydrogen chloride and chlorine etc.
Enriching and recovering after device for recovering tail gas condensation.
Embodiment 2
The extracting method of valuable metal, includes the following steps: in a kind of cupro-nickel vulcanization type mineral
1) cupro-nickel vulcanization type nickel ore concentrate is broken, grinding, screening process obtain the miberal powder that granularity is 80-96 μm, cupro-nickel sulphur
The chemical composition of change type nickel ore concentrate is as shown in table 5.
The main metal element of 5 cupro-nickel vulcanization type nickel ore concentrate of table forms and its mass percentage
2) 20g nickel ore concentrate miberal powder and ammonium chloride are weighed according to the uniform of mass ratio 1:2.5 ground and mixed
3) mixed material is put into porcelain crucible, is placed on after capping in the shaft (tower) furnace containing 25% oxygen, with 15 DEG C/min
Rate rise to 500 DEG C of constant temperature 3h and complete roasting, furnace cooling obtains roasting clinker.
4) roasting clinker is placed in the shaft (tower) furnace containing 30% oxygen, it is cold with furnace in 500 DEG C of roasting temperature 1.5h
But after baking clinker is obtained.
5) after mixing after baking clinker by solid-to-liquid ratio 1:5 with deionized water, 40min is leached in 90 DEG C of mechanical stirrings
Afterwards, be obtained by filtration containing nickel, copper, cobalt, iron, magnesium chloride leachate and filter residue.
6) content for measuring nickel, copper, cobalt, iron in leachate, the recovery rate that nickel is calculated is 92.4%, the recovery rate of copper
It is 93.8%, the recovery rate of cobalt is 89.9%, and the concentration of iron is 0.036mol/L in leachate.
7) precious metal chloride that step 3) and step 4) roasting generate is passed through through distilling with ammonia, hydrogen chloride and chlorine etc.
Enriching and recovering after device for recovering tail gas condensation.
Embodiment 3
The extracting method of valuable metal, includes the following steps: in a kind of cupro-nickel vulcanization type mineral
1) cupro-nickel vulcanization type nickel minerals is broken, grinding, screening process obtain the miberal powder that granularity is 109-120 μm, cupro-nickel sulphur
The chemical composition of change type nickel minerals is as shown in table 6.
The main metal element of 6 cupro-nickel vulcanization type nickel minerals of table forms and its mass percentage
2) 10g nickel minerals miberal powder is weighed, it is uniform according to mass ratio 1:1.5 ground and mixed with ferric chloride hexahydrate.
3) mixed material is put into porcelain crucible, is placed on after capping in the shaft (tower) furnace containing 20% oxygen, with 10 DEG C/min
Rate rise to 180 DEG C of constant temperature 2.5h and complete roasting, furnace cooling obtains roasting clinker.
4) roasting clinker is placed in the shaft (tower) furnace containing 30% oxygen, in 500 DEG C of roasting temperature 1h, furnace cooling
Obtain after baking clinker.
5) after mixing after baking clinker by solid-to-liquid ratio 1:5 with deionized water, 60min is leached in 90 DEG C of mechanical stirrings,
Be obtained by filtration containing nickel, copper, iron, magnesium chloride leachate and filter residue.
6) content for measuring nickel, copper and iron in leachate, the recovery rate that nickel is calculated is 94.9%, and the recovery rate of copper is
87.3%, the concentration of iron is 0.23mol/L in leachate.
7) precious metal chloride that step 3) and step 4) roasting generate is distilled is enriched with after device for recovering tail gas condenses
Recycling.
Embodiment 4
The extracting method of valuable metal, includes the following steps: in a kind of cupro-nickel vulcanization type mineral
1) cupro-nickel vulcanization type nickel ore concentrate is broken, grinding, screening process obtain the miberal powder that granularity is 120-150 μm, cupro-nickel
The chemical composition of vulcanization type nickel ore concentrate is as shown in table 7.
The main metal element of 7 cupro-nickel vulcanization type nickel ore concentrate of table forms and its mass percentage
2) 10g nickel ore concentrate miberal powder is weighed, it is equal according to mass ratio 1:2.4 ground and mixed with the mixture of sodium chloride and magnesium chloride
Even, wherein mass percentage of the magnesium chloride in mixed chlorinated dose is 70%.
3) mixed material is put into porcelain crucible, is placed on after capping in the shaft (tower) furnace containing 30% oxygen, with 15 DEG C/min
Rate rise to 850 DEG C of constant temperature 1.5h and complete roasting, furnace cooling obtains roasting clinker.
4) after roasting clinker being mixed with deionized water by solid-to-liquid ratio 1:10, after 80 DEG C of mechanical stirrings leach 40min, mistake
Filter obtains the mixing leachate and filter residue containing nickel, copper, cobalt, iron, magnesium, na chloride and sodium, magnesium sulfate.
5) content for measuring nickel, copper, cobalt, iron in leachate, the recovery rate that nickel is calculated is 83.6%, the recovery rate of copper
It is 81.3%, the recovery rate of cobalt is 82.4%, and the concentration of iron is 0.017mol/L in leachate.
6) precious metal chloride that step 3) roasting generates is distilled the enriching and recovering after device for recovering tail gas condenses.
Claims (10)
1. the extracting method of valuable metal in a kind of cupro-nickel vulcanization type mineral, which comprises the steps of:
Step 1, material mixes:
After cupro-nickel vulcanization type mineral crushing grinding is formed miberal powder, it is uniformly mixed with chlorinating agent, wherein the powder particle size is small
In 380 μm, the chlorinating agent is (0.1~4) with miberal powder in mass ratio: 1 is mixed；
Step 2, it roasts:
Material will be mixed to roast, generate roasting material, roasting clinker is obtained after cooling, wherein the maturing temperature is
100~950 DEG C, calcining time is 0.5~4h, and calcination atmosphere is oxygen-containing 1~50% atmosphere；
Step 3, it leaches:
By solid-to-liquid ratio (solid masses and liquid volume ratio, unit g:ml) it is 1:(2~10 by roasting clinker and water) after mixing,
Leaching, filtering, obtains leachate and filter residue, completes to extract, wherein the extraction temperature is 60~100 DEG C, when leaching
Between be 0.5~4h.
2. the extracting method of valuable metal in a kind of cupro-nickel vulcanization type mineral according to claim 1, which is characterized in that institute
In the step 1 stated, cupro-nickel vulcanization type mineral are cupro-nickel vulcanization type nickel minerals or cupro-nickel vulcanization type nickel ore concentrate, the cupro-nickel vulcanization type
The component and its mass percentage that mineral include are Ni≤15%, Cu≤10%, Co 0~2%, TFe 10~50%, MgO
≤ 40%, S 10~40%, SiO2≤ 20%, remaining is Al2O3And CaO, total amount≤15%.
3. the extracting method of valuable metal in a kind of cupro-nickel vulcanization type mineral according to claim 1, which is characterized in that institute
In the step of stating (1), chlorinating agent is mixture, ammonium chloride or the ferric chloride hexahydrate (FeCl of sodium chloride and magnesium chloride3·6H2O)
One of, in which:
When chlorinating agent is ammonium chloride, chlorinating agent is (0.5~4) with miberal powder in mass ratio: 1 is mixed；Chlorinating agent is six chloride hydrates
When iron, chlorinating agent is (0.1~4) with miberal powder in mass ratio: 1 is mixed；When chlorinating agent is the mixture of sodium chloride and magnesium chloride, chlorine
Agent is (0.1~4) with miberal powder in mass ratio: 1 mixes, and the mass percentage of magnesium chloride is 1~100% in mixture.
4. the extracting method of valuable metal in a kind of cupro-nickel vulcanization type mineral according to claim 3, which is characterized in that institute
In the step 2 stated, when mixing the chlorinating agent in material is ammonium chloride, maturing temperature is 300~600 DEG C；
When mixing the chlorinating agent in material is ferric chloride hexahydrate, maturing temperature is 100~300 DEG C；
When mixing the mixture that the chlorinating agent in material is sodium chloride and magnesium chloride, maturing temperature is 300~950 DEG C.
5. the extracting method of valuable metal in a kind of cupro-nickel vulcanization type mineral according to claim 1, which is characterized in that institute
It in the step 2 stated, mixes material and is roasted after ball is made or roasting direct, the baking operation is closed vertical
It is carried out in furnace, the lower end of shaft (tower) furnace connects device for recovering tail gas, and upper end connects gas access equipment.
6. the extracting method of valuable metal in a kind of cupro-nickel vulcanization type mineral according to claim 5, which is characterized in that institute
In the step 2 stated, in roasting process: the cycling of elements such as copper, nickel, cobalt, magnesium, iron in cupro-nickel vulcanization type mineral are soluble metal
Chloride, the precious metal elements such as gold, silver and platinum group metal in cupro-nickel vulcanization type mineral form corresponding precious metal chloride, together
The gases such as Shi Shengcheng ammonia, hydrogen chloride and chlorine；Realize that copper, nickel, the comprehensive of cobalt valuable metal are extracted, specifically, what is generated is expensive
Metal chloride through distilling, with ammonia, hydrogen chloride and chlorine etc. after device for recovering tail gas condenses enriching and recovering.
7. the extracting method of valuable metal in a kind of cupro-nickel vulcanization type mineral according to claim 3, which is characterized in that institute
In the step 2 stated, chlorinating agent is cooked by ammonium chloride or ferric chloride hexahydrate and carries out roasting the secondary roasting of obtained roasting clinker progress
It burns, obtains after baking material, after baking clinker is obtained after furnace cooling, then carry out the leaching operation of step 3, after baking
In the process, the chloride for roasting the iron in clinker is converted into iron oxide, and conversion ratio is greater than 90%.
8. the extracting method of valuable metal in a kind of cupro-nickel vulcanization type mineral according to claim 1, which is characterized in that institute
In the step 3 stated, after the completion of leaching, the recovery rate of nickel, copper and cobalt is all larger than 80%, and iron ion content is less than in leachate
0.4mol/L。
9. the extracting method of valuable metal in a kind of cupro-nickel vulcanization type mineral according to claim 7, which is characterized in that institute
In the step 3 stated:
Using ammonium chloride cook chlorinating agent by once roast or double roasting after, then leach, the recovery rate of nickel and copper is all larger than
90%, the recovery rate of cobalt is greater than 85%；
Using ferric chloride hexahydrate cook chlorinating agent by once roast or double roasting after, then leach, the recovery rate of nickel is greater than
90%, the recovery rate of copper and cobalt is greater than 80%；
Chlorinating agent is cooked after once roasting using sodium chloride and magnesium chloride mixture, then is leached, the recovery rate of copper, nickel and cobalt is equal
Greater than 80%.
10. the extracting method of valuable metal in a kind of cupro-nickel vulcanization type mineral according to claim 7, which is characterized in that
In the method:
Chlorinating agent is cooked using ammonium chloride or ferric chloride hexahydrate, after once roasting, then is leached, the leachate of acquisition and filter
Slag, iron ion content is greater than 0.4mol/L in leachate, after double roasting, then leaches, the leachate and filter residue of acquisition, soaks
Iron ion content is less than 0.4mol/L in liquid out；
Chlorinating agent is cooked after once roasting using sodium chloride and magnesium chloride mixture, then is leached, the leachate and filter residue of acquisition,
Iron ion content is less than 0.2mol/L in leachate.
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| CN201910030813.8A CN109439892B (en) | 2019-01-14 | 2019-01-14 | Method for extracting valuable metals from copper-nickel sulfide minerals |
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| CN201910030813.8A CN109439892B (en) | 2019-01-14 | 2019-01-14 | Method for extracting valuable metals from copper-nickel sulfide minerals |
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Cited By (2)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109881001A (en) * | 2019-04-02 | 2019-06-14 | 柳州光华科技有限公司 | The method of tin material is extracted in a kind of tin ore |
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