CN104674025A - Method of pre-treating molybdenite containing copper - Google Patents
Method of pre-treating molybdenite containing copper Download PDFInfo
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- CN104674025A CN104674025A CN201310684810.9A CN201310684810A CN104674025A CN 104674025 A CN104674025 A CN 104674025A CN 201310684810 A CN201310684810 A CN 201310684810A CN 104674025 A CN104674025 A CN 104674025A
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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
- C22B34/00—Obtaining refractory metals
- C22B34/30—Obtaining chromium, molybdenum or tungsten
- C22B34/34—Obtaining molybdenum
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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
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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
Abstract
Disclosed is a method of pre-treating molybdenite containing copper. The method includes mixing molybdenite containing copper with sulfuric acid, performing a sulfation reaction through a heating process after the mixing process is performed, performing a water leaching process by putting and stirring water after the sulfation reaction is performed, separating a cake from liquid after the water leaching process is performed, and drying the separated cake.
Description
Technical field
The present invention relates to the pretreatment process of the cupric molybdenum glance removing the copper contained in low-grade molybdenum glance.
Background technology
Molybdenum plays the thermal creep characteristic improving iron and steel, prevents from tilting fragility, increases the corrosion proof effect of steel, is very important element in the manufacture of high temperature steel or as alloying element at the manufacture view of corrosion-resisting steel.Steel Determination of Copper in Molybdenum Iron processed is generally restricted to less than 0.5%.
Molybdenum glance (molybdenite, MoS
2) for there being the primary material of the molybdenum of economy, the concentration of the molybdenum in raw ore is generally only about 0.05 ~ 0.1 % by weight, and concentration is lower, but according to pyritous characteristic, can flotation be passed through, easily reclaim and concentrate sulfide together with copper, iron etc.
Copper Ores is also pyrite, is therefore difficult to only by beneficiating process, the copper content in molybdenum glance is reduced to less than 0.5%, and the rate of recovery of molybdenum also can decline, and the molybdenum glance that copper content is high is also difficult to reduce copper content, however, is also producing and is selling.
Be, after roasting molybdenum glance makes oxide compound, leach with dilution heat of sulfuric acid and to make a return journey copper removal by the method for the low grade molybdenite manufacture steel molybdenum-iron containing copper, carry out afterwards filtering and after drying through thermal reduction operation, produce molybdenum-iron.But according to method as above, when carrying out sulfuric acid leaching, dissolving in the aqueous solution and having a large amount of molybdenum, and causing molybdenum to lose, therefore need the operation reclaiming molybdenum, and MoO when leaching
3react with water, and exist with the form of molybdic acid, the moisture drying lot of energy of filter cake (cake) thus.In order to make up this shortcoming, just developing and leaching and the method removed for namely carrying out under the state of sulfide before roasting.United States Patent (USP) the 1st, 895, No. 811 (on 01 31st, 1933 open) relate to the pretreatment process (Process for the treatment of ores) of ore, exist and do not need the simple advantage of high pressure vessel, operation, but when the vitriol oil is added to molybdenum ore and pyroprocessing, temperature is higher, with the speed of response of copper sulfide and reactivity higher, therefore the surface that there is molybdenum glance is also oxidized, leaches the problem in the aqueous solution together with copper.Therefore can also by the operation of the minimize oxidation of molybdenum while needing to develop the clearance that can improve copper.
Summary of the invention
Therefore, the object of the invention is to, the pretreatment process minimize oxidation of molybdenum also only can being removed the cupric molybdenum glance of copper when the low grade molybdenite containing cupric sulfide and sulfuric acid react is provided.
The problem to be solved in the present invention is not limited to the above problem related to, and those skilled in the art can by clearly understanding the other problems do not related in following record.
In order to solve the problem, the invention provides the pretreatment process of cupric molybdenum glance, it comprises: the step of mixing cupric molybdenum glance and sulfuric acid; Mixing post-heating, carries out the step of sulfating reaction; Add water after above-mentioned sulfating reaction stirring, carries out the step that water logging goes out; Above-mentioned water logging goes out the step of rear separate solid and liquid; And dry step is carried out to isolated above-mentioned solid.
Now, be characterised in that, above-mentioned sulfating reaction carries out 20 ~ 80 minutes at 180 ~ 240 DEG C of temperature.
Be characterised in that, relative to molybdenum glance, the equivalence ratio with 0.9 ~ 1.8 mixes above-mentioned sulfuric acid.
Further, be characterised in that, above-mentioned sulfating reaction carries out 40 ~ 80 minutes at 210 ~ 240 DEG C of temperature.
Be characterised in that, above-mentioned water be selected from the group that is made up of distilled water, deionized water, hard water and heavy water more than one.
Further, the pretreatment process of cupric molybdenum glance of the present invention can also be included in the above-mentioned molybdenum glance of mixing and sulfuric acid before the step of above-mentioned molybdenum glance being carried out to flotation of carrying out.
According to the present invention, when in order to process molybdenum glance by the low grade molybdenite manufacture steel molybdenum-iron containing copper, regulating the temperature and time of sulfating reaction, thus can prevent molybdenum in the past from leaching the problem in the aqueous solution, the clearance of copper can also be improved.
Further, be only leach after copper sulfate to remove in water by copper sulphide conversion, and carried out compared with sulfuric acid leaching after baking in the past, easy solid-liquid separation, and the expense from waste acidity recovery molybdenum can be reduced.
Accompanying drawing explanation
Fig. 1 is the precedence diagram of the pretreatment process that cupric molybdenum glance of the present invention is shown.
Fig. 2 illustrates the graphic representation in water-sulfuric acid system based on the boiling point of sulfuric acid concentration.
Fig. 3 is the graphic representation based on the clearance of the copper of sulfuric acid addition in the pretreatment process that cupric molybdenum glance of the present invention is shown.
Fig. 4 is the X-ray diffraction analysis result based on the molybdenum glance of sulfuric acid addition in the pretreatment process of cupric molybdenum glance of the present invention.
Fig. 5 is the graphic representation of the concentration of copper in the molybdenum glance changed according to sulfating reaction temperature and reaction times in the pretreatment process that cupric molybdenum glance of the present invention is shown.
Fig. 6 is the graphic representation of the molybdenum dissolution rate changed according to sulfating reaction temperature and reaction times in the pretreatment process that cupric molybdenum glance of the present invention is shown.
Embodiment
Below, with reference to accompanying drawing, preferred embodiment of the present invention is described in detail.
The embodiment described in detail with reference to accompanying drawing can allow advantages and features of the invention and realize these advantages and feature method definitely.
But; the present invention is not limited to following the disclosed embodiments; can implement in mutually different various mode; the present embodiment is only for making disclosure of the present invention more complete; contribute to general technical staff of the technical field of the invention and intactly understand category of the present invention, the present invention defines according to the claimed scope of invention.
Further, when describing the present invention, when being judged as that the known technology etc. of being correlated with can mix up main idea of the present invention, its description is omitted.
The invention provides the pretreatment process of cupric molybdenum glance, it comprises: the step of mixing cupric molybdenum glance and sulfuric acid; Mixing post-heating, carries out the step of sulfating reaction; Add water after above-mentioned sulfating reaction stirring, carries out the step that water logging goes out; Above-mentioned water logging goes out the step of rear separate solid and liquid; And dry step is carried out to isolated above-mentioned solid.
Low-grade molybdenum glance containing cupric sulfide and sulfuric acid react by the pretreatment process of cupric molybdenum glance of the present invention, after the copper contained in molybdenum glance is become copper sulfate, go out to remove copper with water logging, when reacting with sulfuric acid, regulate temperature and time, thus the clearance of copper can be improved, and by the minimize oxidation of molybdenum.
Fig. 1 is the precedence diagram of the pretreatment process that cupric molybdenum glance of the present invention is shown.Below, with reference to Fig. 1, the present invention will be described in detail.
The pretreatment process of cupric molybdenum glance of the present invention comprises the step S100 of mixing cupric molybdenum glance and sulfuric acid.
In the pretreatment process of cupric molybdenum glance of the present invention, containing chalcopyrite (chalcopyrite, CuFeS in above-mentioned cupric molybdenum glance
2), copper glance (chalcocite, Cu
2and purple copper (bornite, Cu S)
5feS
4) etc., make copper sulfate by making these mineral and sulfuric acid react.Now, before molybdenum glance is mixed with sulfuric acid, also comprise and perform the step of flotation circuit, make the mineral with water repellent surface in molybdenum glance particle be attached to the surface of bubble and the surface to solution is floated up, and the mineral of hydrophilic surface stay in the solution, realize thus being separated.Further, also comprise the step of molybdenum glance being carried out to fragmentation and pulverizing, thus more can improve the reactivity of molybdenum glance and sulfuric acid.
Further, in order to mix molybdenum glance and sulfuric acid equably, when sulfuric acid not soaking all molybdenum glances, water can be added and mix equably.
The pretreatment process of cupric molybdenum glance of the present invention is included in mixing post-heating, carries out the step S200 of sulfating reaction.
Now, the sulfuric acid amount added need meet the amount that all elements that the copper (Cu), iron (Fe), zinc (Zn) etc. that make to be existed by the form of sulfide and the basic metal be contained in low grade molybdenite or alkaline earth metal oxide etc. can react with sulfuric acid reacts, but the kind of the sulfuric acid lost according to evaporation and impurity, reactive different, therefore according to raw material or reaction unit, the sulfuric acid amount of adding can be regulated.In pretreatment process of the present invention, preferably, relative to molybdenum glance, with the equivalence ratio mixing sulfuric acid of 0.9 ~ 1.8.When mixing above-mentioned sulfuric acid with the amount being less than 0.9 equivalence ratio, there is the problem that the clearance of the copper be contained in molybdenum glance is low, and when equivalence ratio is greater than 1.8, there is the problem that the molybdenum be contained in molybdenum glance leaches.
Fig. 2 illustrates the graphic representation in water-sulfuric acid system based on the boiling point (boiling point) of sulfuric acid concentration.As shown in Figure 2, can be under atmospheric pressure the sulfuric acid of about 98.3 % by weight and the azeotropic point (eutectic point) 330 DEG C of water by the top temperature of vitriolization, as a reference, the boiling point of the sulfuric acid of 90 % by weight be 255 DEG C.
Make molybdenum glance and sulfuric acid generation sulfating reaction, then, as shown in following reaction formula 1, reaction formula 2 and reaction formula 3, the copper be contained in molybdenum glance is formed as copper sulfate.
Reaction formula 1
1/2CuFeS
2+2H
2SO
4→1/2CuSO
4+1/2FeSO
4+S+2H
2O+SO
2↑
Reaction formula 2
1/2CuS
2+2H
2SO
4→CuSO
4+1/2S+2H
2O+SO
2↑
Reaction formula 3
1/4Cu
5FeS
4+3H
2SO
4→5/4CuSO
4+1/4FeSO
4+S+3H
2O+3/2SO
4↑
Following table 1 is for illustrating the CuFeS be contained in above-mentioned molybdenum glance
2, Cu
2s and Cu
5feS
4the reaction heat (Δ H) generated when reacting with sulfuric acid, Gibbs free energy (Δ G) and the equilibrium constant (K).As shown in Table 1, temperature is higher, and reactivity (equilibrium constant) more increases, and reaction heat is weak thermo-negative reaction (Δ H is positive number).
Table 1
If make molybdenum glance and sulfuric acid react, then according to reaction formula 4 or reaction formula 5, surface can be oxidized, and oxidized molybdenum glance is dissolved in water in a large number.
Reaction formula 4
MoS
2+2H
2SO
4→MoO
2+2S+2H
2O+2SO
2↑
Reaction formula 5
MoS
2+3H
2SO
4→MoO
3+2S+3H
2O+3S O
2↑
Following table 2 is for illustrating the reaction heat (Δ H) of the oxidizing reaction of molybdenum glance and sulfuric acid, Gibbs free energy (Δ G) and the equilibrium constant (K).Known, the oxidizing reaction of molybdenum glance and sulfuric acid is also also increase along with temperature increases reactivity (equilibrium constant).
Table 2
From the above, copper sulfide and molybdenum glance all also uprise along with temperature increases reactivity.But, copper (Cu) and molybdenum (Mo) with the reactivity of the vitriol oil on variant.That is, the oxide compound of copper (Cu), iron (Fe) etc. is basic oxide, easy and sulfuric acid reaction.On the contrary, the oxide compound of molybdenum (Mo) is acidic oxide, is not easy and sulfuric acid reaction.Similarly, copper sulfide than molybdenum sulfide easily with sulfuric acid reaction.Therefore, suitably regulate the reaction conditions with sulfuric acid, then most copper sulfide can be made to be formed as copper sulfate, molybdenumdisulphide (MoS
2) do not react.Therefore, preferably, above-mentioned sulfating reaction carries out 20 ~ 80 minutes at 180 ~ 240 DEG C of temperature.When the temperature of above-mentioned sulfating reaction is lower than 180 DEG C, the problem that the clearance that there is copper declines, and when higher than 240 DEG C, the leaching yield that there is molybdenum increases, and needs the problem reclaiming molybdenum from infusion solution.Further, when the above-mentioned sulfating reaction time is less than 20 minutes, there is the copper be contained in molybdenum glance and remove to obtain sufficient not problem, and when more than 80 minutes, there is the problem that molybdenum leaches.
Sulfating reaction device can be intermittent type or continous way, but intermittent reaction device makes reaction nitride layer thin, makes reactant entirety keep uniform temperature.Continuous reaction apparatus also makes reactor monolith temperature keep evenly, and the flowing of reactant is remained laminar flow (plug flow), to make reactant identical in the residence time of the inside of reactor.Preferably, the reactant terminated after sulfating reaction is discharged, and is cooled to the temperature of less than 100 DEG C.
Add water after the pretreatment process of cupric molybdenum glance of the present invention comprises above-mentioned sulfating reaction stirring, carries out the step S300 that water logging goes out.
In the pretreatment process of cupric molybdenum glance of the present invention, to the molybdenum glance terminated after sulfating reaction, intermittent type or continous way can be utilized at the leaching vat with agitator, copper sulfate and other impurities etc. are gone out to remove with water logging.Above-mentioned water can use in the group being selected from and being made up of distilled water, deionized water, hard water and heavy water more than one.
Secondly, the pretreatment process of cupric molybdenum glance of the present invention comprises the step S400 that above-mentioned water logging goes out rear separate solid and liquid.
In the pretreatment process of cupric molybdenum glance of the present invention, carry out after above-mentioned water logging goes out, performing the solid-liquid separation of solid and the liquid isolated in solution.Now, solid-liquid separation can perform at filtration units such as belt filter (belt filter) or drum strainers (drum filter).
The pretreatment process of cupric molybdenum glance of the present invention comprises the step S500 isolated above-mentioned solid being carried out to drying.
In order to the moisture in drying solid, drying process can be performed to isolated above-mentioned solid (cake).
Further, the invention provides the pretreatment process of cupric molybdenum glance, it comprises: the step of mixing cupric molybdenum glance and sulfuric acid; Mixing post-heating to 210 ~ 240 DEG C, carry out the step of sulfating reaction; Add water after above-mentioned sulfating reaction stirring, carries out the step that water logging goes out; Above-mentioned water logging goes out the step of rear separate solid and liquid; And dry step is carried out to isolated above-mentioned solid.
In the pretreatment process of cupric molybdenum glance of the present invention, above-mentioned sulfating reaction carries out 40 ~ 80 minutes at 210 ~ 240 DEG C of temperature, and copper is removed more than 99%, and molybdenum is reclaimed more than 99.7% (with reference to experimental example 2 and experimental example 3).Now, preferably, relative to molybdenum glance, the equivalence ratio with 0.9 ~ 1.8 mixes above-mentioned sulfuric acid, and above-mentioned restriction reason is described above.
Embodiment 1: the pre-treatment of cupric molybdenum glance
Illustrate in following table 3 and flotation has been carried out to the molybdenum glance taked from Jin Yin mine, North Kyongsang luxuriant precious prefecture and the constitution element of the concentrate obtained and content.Put the molybdenum glance 20g of following table 3 and the concentrated sulfuric acid solution 50ml being dissolved with sulfuric acid into porcelain crucible, and after mixing equably with glass stick, utilize retort furnace (muffle furnace) to carry out sulfating reaction.Take out sample after sulfating reaction and after cooling, in 1000ml flask, put into distilled water 200ml, at 90 DEG C of temperature, stir 60 minutes with 300rpm (per minute rotating speed), realizing leaching.By the sample prepared like this, after utilizing glass fiber filter paper to filter, drying 24 hours at 112 DEG C of temperature.
Table 3
Experimental example 1: based on concentration and the clearance analysis of the copper of sulfuric acid addition
In the pretreatment process of cupric molybdenum glance of the present invention, analyze the concentration based on the copper of sulfuric acid addition and clearance, and the results are shown in following table 4, Fig. 3 and Fig. 4.
Table 4
As above shown in table 4 and Fig. 3, sulfating reaction temperature be 180 DEG C and 225 DEG C time, all along with the increase of sulfuric acid addition, copper removal rate also increases (sulfating reaction time: 40 minutes).When sulfating reaction temperature is 225 DEG C, show the copper removal rate of 97% when sulfuric acid addition is 16g, along with sulfuric acid addition increases, the clearance of copper also increases.Further, even if known sulfuric acid addition is identical, when sulfating reaction temperature is 225 DEG C, the clearance of copper is the situation of 180 DEG C higher than sulfating reaction temperature.
Further, Fig. 4 is the X-ray diffraction analysis result based on the molybdenum glance of sulfuric acid addition in the pretreatment process of cupric molybdenum glance of the present invention.Can confirm with reference to Fig. 4, the molybdenum glance before sulfating reaction has observed molybdenum glance and quartz (quartz), but there are molybdenum glance, sulphur (sulfur) and quartz etc. after sulfating reaction.
Experimental example 2: based on the analysis of the concentration of the copper of sulfating reaction temperature and time
In the pretreatment process of cupric molybdenum glance of the present invention, analyze the concentration based on the copper in sulfating reaction temperature and the molybdenum glance in reaction times, the results are shown in table 5 and Fig. 5.
Table 5
| Sulfating reaction | 180℃ | 210℃ | 225℃ | 240℃ | 270℃ | 300℃ |
| 10 minutes | 7.64 | 3.5 | 2.15 | 1.76 | 0.22 | 0.14 |
| 20 minutes | 6.03 | 2.12 | 0.54 | 0.34 | 0.18 | 0.14 |
| 30 minutes | 2.7 | 0.81 | 0.33 | 0.05 | 0.058 | 0.043 |
| 40 minutes | 1.38 | 0.65 | 0.074 | 0.045 | 0.042 | 0.031 |
| 80 minutes | 0.76 | 0.06 | 0.031 | 0.032 | 0.031 | 0.029 |
From upper table 5 and Fig. 5, if sulfating reaction temperature performs the sulfating reaction of 80 minutes when being 210 DEG C, then remain the copper of 0.06 % by weight, if perform 30 minutes 225 DEG C time, then only remain the copper of 0.33 % by weight, if perform 20 minutes at 240 DEG C, then remain the copper of 0.34 % by weight, if perform 10 minutes 270 DEG C and 300 DEG C, then only remain 0.22 % by weight, 0.14 % by weight (H respectively
2sO
4addition: 32g).Therefore, under the temperature of reaction of 210 DEG C, carry out the sulfating reaction of 80 minutes, copper content in molybdenum glance can be reduced to less than 0.5 % by weight, 30 minutes are carried out at 225 DEG C, carry out 20 minutes at 240 DEG C, only carry out 10 minutes 270 DEG C and 300 DEG C, just the copper content in molybdenum glance can be removed to less than 0.5 % by weight.
Experimental example 3: based on the analysis of the molybdenum dissolution rate of sulfating reaction temperature and time
In the pretreatment process of cupric molybdenum glance of the present invention, analyze the molybdenum dissolution rate based on sulfating reaction temperature and time, the results are shown in table 6 and Fig. 6.
Table 6
| Sulfating reaction | 180℃ | 210℃ | 225℃ | 240℃ | 270℃ | 300℃ |
| 10 minutes | 0.11 | 0.1 | 0.2 | 0.15 | 0.23 | 0.27 |
| 20 minutes | 0.13 | 0.12 | 0.19 | 0.16 | 0.15 | 0.21 |
| 30 minutes | 0.18 | 0.14 | 0.18 | 0.16 | 1.17 | 5.88 |
| 40 minutes | 0.21 | 0.18 | 0.23 | 0.15 | 3 | 8.1 |
| 80 minutes | 0.18 | 0.22 | 0.15 | 3.49 | 3.58 | 8.6 |
From upper table 6 and Fig. 6, along with sulfating reaction temperature is higher, the time is longer, the dissolution rate of molybdenum more increases.(H
2sO
4: 32g, molybdenum glance: 20g).That is, if 240 DEG C of reactions more than 80 minutes, 270 DEG C of reactions more than 30 minutes, then the surface of molybdenum glance was oxidized.Therefore, being judged as within the scope of the sulfatizing temperature of 210 ~ 240 DEG C, if regulate the sulfating reaction time, then when not having molybdenum to lose, copper can being removed completely.That is, at the sulfating reaction temperature of 210 ~ 240 DEG C, perform the reaction of 40 ~ 80 minutes, then copper can be removed more than 99%, and molybdenum is reclaimed more than 99.7%.
Up to the present, the specific embodiment of the pretreatment process of cupric molybdenum glance of the present invention is illustrated, but it is apparent for can carrying out various distortion in not departing from the scope of the present invention.
Therefore, scope of the present invention can not be confined to illustrated embodiment, should depend on the claimed scope of invention and equivalent replacement thereof.
Namely; should be interpreted as; aforesaid embodiment is only exemplarily property explanation in every respect; be not used in restriction the present invention; scope of the present invention is not represent in detailed description; but according to the claimed Range Representation of invention, the form of the meaning of the scope that the present invention will protect, scope and all changes of deriving from its equivalents and distortion is all within the scope of the present invention.
Claims (11)
1. a pretreatment process for cupric molybdenum glance, is characterized in that, comprising:
The step of mixing cupric molybdenum glance and sulfuric acid;
Mixing post-heating, carries out the step of sulfating reaction;
Add water after above-mentioned sulfating reaction stirring, carries out the step that water logging goes out;
Above-mentioned water logging goes out the step of rear separate solid and liquid; And
Dry step is carried out to isolated above-mentioned solid.
2. the pretreatment process of cupric molybdenum glance according to claim 1, is characterized in that, at 180 ~ 240 DEG C of temperature, carry out above-mentioned sulfating reaction.
3. the pretreatment process of cupric molybdenum glance according to claim 1, is characterized in that, above-mentioned sulfating reaction carries out 20 ~ 80 minutes.
4. the pretreatment process of cupric molybdenum glance according to claim 1, is characterized in that, relative to molybdenum glance, the equivalence ratio with 0.9 ~ 1.8 mixes above-mentioned sulfuric acid.
5. the pretreatment process of cupric molybdenum glance according to claim 1, is characterized in that, with the equivalence ratio mixing sulfuric acid of 0.9 ~ 1.8, carries out 20 ~ 80 minutes above-mentioned sulfating reactions at 180 ~ 240 DEG C of temperature.
6. the pretreatment process of cupric molybdenum glance according to claim 1, is characterized in that, at 210 ~ 240 DEG C of temperature, carry out above-mentioned sulfating reaction.
7. the pretreatment process of cupric molybdenum glance according to claim 6, is characterized in that, above-mentioned sulfating reaction carries out 40 ~ 80 minutes.
8. the pretreatment process of cupric molybdenum glance according to claim 6, is characterized in that, relative to molybdenum glance, the equivalence ratio with 0.9 ~ 1.8 mixes above-mentioned sulfuric acid.
9. the pretreatment process of cupric molybdenum glance according to claim 1, is characterized in that, with the equivalence ratio mixing sulfuric acid of 0.9 ~ 1.8, carries out 40 ~ 80 minutes above-mentioned sulfating reactions at 210 ~ 240 DEG C of temperature.
10. the pretreatment process of cupric molybdenum glance according to claim 1, is characterized in that, above-mentioned water be selected from the group that is made up of distilled water, deionized water, hard water and heavy water more than one.
The pretreatment process of 11. cupric molybdenum glances according to claim 1, is characterized in that, the step of above-mentioned molybdenum glance being carried out to flotation of carrying out before being also included in the above-mentioned molybdenum glance of mixing and sulfuric acid.
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| CN109338108A (en) * | 2018-11-16 | 2019-02-15 | 王水平 | A kind of wet-treating tungsten product molybdenum removal slag and the process for recycling molybdenum, copper, tungsten, sulphur |
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| CL2018003101A1 (en) * | 2018-10-30 | 2018-12-14 | Molibdenos Y Metales S A | Process for the selective removal of copper compounds and other impurities with respect to molybdenum and rhenium, from molybdenite concentrates. |
| CN109482363A (en) * | 2018-12-29 | 2019-03-19 | 紫金矿业集团股份有限公司 | Copper-molybdenum bulk concentrate sulfur acid pretreatment separating flotation method |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP5833621B2 (en) | 2015-12-16 |
| JP2015105436A (en) | 2015-06-08 |
| US20150147247A1 (en) | 2015-05-28 |
| WO2015080326A1 (en) | 2015-06-04 |
| KR20150064258A (en) | 2015-06-11 |
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