CN106507815B - A kind of method for improving uranium molybdenum ore leaching rate - Google Patents
A kind of method for improving uranium molybdenum ore leaching rateInfo
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- CN106507815B CN106507815B CN201110011713.4A CN201110011713A CN106507815B CN 106507815 B CN106507815 B CN 106507815B CN 201110011713 A CN201110011713 A CN 201110011713A CN 106507815 B CN106507815 B CN 106507815B
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Abstract
The present invention provides a kind of method for improving uranium molybdenum ore leaching rate, and which comprises the steps：(1) mill is broken；(2) first step alkaline Leaching；(3) second step acid system is leached.The present invention cracks sulfide, then the substep extract technology of acid system Strengthen education by first alkaline Leaching oxidation, and uranium molybdenum obtains higher leaching rate, it is ensured that the synthetical recovery of resource, while reducing reagent consumption.In addition the introducing of the difficult ion-oxygen agent such as chloride or nitrate anion is avoided, the reuse of fresh water (FW) can be realized, meet current environmental protection theory.
Description
Technical field
The present invention relates to the Comprehensive Recovery Technology of uranium molybdenum ore resource, and in particular to a kind of uranium molybdenum ore that improves is leached
The method of rate.
Background technology
For the synthetical recovery of uranium molybdenum ore, once the research of some was carried out both at home and abroad, its leaching-out technique achievement
Mainly there are following several respects：
(1) dump leaching is processed.The advantage of the method is that ore grain size is thicker, it is to avoid solid-liquid separation, saves
Cost, but often the leaching effect cycle is long, and leaching rate is low, and is not suitable for cold district.Such as Argentina
Cerro Solo mining areas once carried out stack-soak test, the best result of uranium molybdenum leaching rate is respectively 76% He
47%；And the white crane rock uranium molybdenum ore of China was also carried out mixing sour ripening stack-soak test research, but the leaching of molybdenum
Rate only 30% or so.
(2) convention stir is leached.For with respect to dump leaching, ore treatment granularity is thinner, and leaching effect has one
Fixed raising, but processing cost is therefore also increased, while the increase rate of molybdenum leaching rate is often limited.Such as
Sandstone of the Glan Ci Chang (Grants) in the U.S. using acidleach routine leaching process uranium-bearing molybdenum Lycoperdon polymorphum Vitt, the leaching of uranium
Go out rate up to 90%, but the leaching rate of molybdenum is still very low.
(3) leaching of ore deposit ripening Strong oxdiative is mixed.Will Ore first admix concentrated sulphuric acid maturation process, then
The strong oxidizer such as sodium chlorate or nitrate is added to be aoxidized in leaching process, the method can be obtained preferably
Uranium molybdenum leaching effect.Ore deposit is mixed using sulphuric acid such as A Kuta factories of the Niger, it is aided with nitric acid oxidation, uranium is returned
Yield is up to 94%；Beijing Inst. of Chemical Metallurgy, Ministry of Nuclear Industry of China ore deposit ripening is mixed using sulphuric acid and sodium chlorate
Process certain uranium molybdenum ore, up to 90%, the leaching rate of molybdenum is up to more than 75% for the leaching of uranium.The method is being worked as
When can be described as a kind of effective technique, but at present due to the demand of environmental protection, fresh water (FW) need to return profit
With, and nitrate anion and chlorine root are difficult to economic removal, and can be more long-pending higher after return, affect technique normally to enter
OK, so being difficult to implement again.
(4) pressure leaching.The temperature of Leach reaction is improved by high pressure during Ore leaching
Mineral while being passed through oxidant oxygen, are aoxidized, for the leaching of molybdenum ore thing can be played by degree
Certain lifting effect.Original uranium molybdenum ore such as China adopts pressure leaching, the leaching rate nearly 90% of uranium,
The leaching rate of molybdenum has also brought up to more than 60%.But the method requires higher, the throwing of needs to leaching equipment
Money is larger.Additionally, due to be with pressure carry out, there is higher requirement also to the safe operation of equipment, be intended to
Ask and take appointment with certificate, therefore general manufacturing enterprise is avoided as far as possible using pressurization production.
In sum, currently used for the technology for processing uranium molybdenum ore, or leaching rate is relatively low, or being difficult to full
The current environmental requirement of foot or the high pressure equipment for needing input higher, especially to some intractable uranium
Molybdenum ore, does not also have a kind of simple handling process.
Content of the invention
It is an object of the invention to provide a kind of method for improving uranium molybdenum ore leaching rate, which is easy to operate, energy
Enough meet current environmental requirement, the extract technology of the difficult uranium molybdenum ore of suitable treatment China.
Realize the technical scheme of the object of the invention：A kind of improve uranium molybdenum ore leaching rate method, it include as
Lower step：
(1) mill is broken：It is milled to broken for uranium molybdenum ore below -60 mesh of granularity；
(2) first step alkaline Leaching：Alkaline Leaching is carried out to step (1) gained uranium molybdenum ore, is added
Leaching agent and oxidant stirring pulping, leaching agent are (1～5) with the liquid-solid ratio of uranium molybdenum ore: 1, leach
Temperature be room temperature～80 DEG C, extraction time 1～8 hour；Described leaching agent is sodium hydroxide, hydroxide
Potassium, sodium carbonate or solution of potassium carbonate, wherein sodium hydroxide, potassium hydroxide, sodium carbonate or potassium carbonate quality
For uranium molybdenum ore quality 1～15%；Oxidant is potassium permanganate or hydrogen peroxide, wherein potassium permanganate quality
For the 0.2～3% of uranium molybdenum ore quality, dioxygen water quality for uranium molybdenum ore quality 1～15%；After leaching
Solid-liquid separation obtains alkali leaching liquor and a leached mud；
(3) second step acid system is leached：Acid system leaching is carried out to leached mud of step (2) gained, plus
The liquid-solid ratio for entering leaching agent and oxidant stirring pulping, leaching agent and a leached mud is (1～5): 1,
Extraction temperature be room temperature～90 DEG C, extraction time 1～8 hour；Leaching agent is sulfuric acid solution, wherein sulphuric acid
Quality is the 3～30% of a leached mud quality；Oxidant be potassium permanganate, hydrogen peroxide or pyrolusite, its
Middle potassium permanganate quality is the 0.2～3% of a leached mud quality, and dioxygen water quality is once leaching slag
The 1～15% of amount, pyrolusite quality is the 1～10% of a leached mud quality；Solid-liquid separation obtains acidleach
Go out liquid and secondary leached mud；
Above-mentioned alkali leaching liquor and acid leaching liquor enter subsequent processing and carry out uranium, molybdenum element recovery；Secondary leaching
Slag sends into tailings storehouse.
As above a kind of improve uranium molybdenum ore leaching rate method, which is entered using sour water to secondary leached mud
Tailings storehouse is re-fed into after row washing；PH≤1.5 of wherein sour water, the liquid of sour water consumption and secondary leached mud
Gu than being (1～5): 1；The leaching that gained wash water is leached as step (3) second step acid system after adding sulphuric acid
Go out agent.
As above a kind of improve uranium molybdenum ore leaching rate method, it is characterised in that：Step (2) is described
First step alkaline Leaching, the preferred sodium hydroxide of leaching agent or sodium carbonate liquor, the preferred permanganic acid of oxidant
Potassium or hydrogen peroxide；Second step acid system leaching described in step (3), the preferred pyrolusite of oxidant or hydrogen peroxide.
Effect of the invention is that：
Method uranium molybdenum ore of the present invention is first passed around brokenly and is milled to certain particle size (below -60 mesh), is made
Mineral therein obtain a certain degree of exposure；(water soluble alkali is solvable to be subsequently adding appropriate leaching agent
Acid carbonate etc.) and oxidant, while stir keeping ore particles being uniformly distributed in ore pulp, make leaching
Go out agent and oxidant and reaction is fully contacted with the associated minerals in Ore, for oxygen under sulfide alkaline environment
Change and crack current potential well below this characteristic of sour environment, using oxidizing dissolving sulfur make its to related
Mineral depart from, and expose primary molybdenum ore thing, while leaching section molybdenum ore thing and uranium mineral, reaction a period of time
Afterwards, by solid-liquid separation on ore pulp, leachate is used for reclaiming uranium molybdenum, and leached mud adds acid lixiviant (sulfur again
Aqueous acid) and oxidant slurrying, the high oxidation potential using oxidant in sour environment is to exposing
Low price molybdenum and remaining uranium mineral aoxidized strongly, leach again, to improve uranium molybdenum leaching rate.
Sulfide, then the substep extract technology of acid system Strengthen education, uranium are cracked by the oxidation of first alkaline Leaching
Molybdenum obtains higher leaching rate, it is ensured that the synthetical recovery of resource, while reducing reagent consumption.Separately
The introducing of the difficult ion-oxygen agent such as chloride or nitrate anion is avoided outward, the reuse of fresh water (FW) can be realized,
Meet current environmental protection theory.
For example：China's uranium molybdenum deposit Ore, is leached using conventional acid, and sour addition is ore quality
20%, add 1% potassium permanganate, the leaching rate of molybdenum to be less than 40%, improve potassium permanganate consumption
To more than the 10% of ore quality, the cinder grade of uranium below 0.02%, the leaching rate of molybdenum up to 75% with
On, and up to 15000 yuan/ton of potassium permanganate price, reagent cost is mutually expensive.First alkali using the present invention
Method is leached, and the substep extract technology that rear acid system is leached, potassium permanganate consumption are controlled below 2%, and cost is big
Width declines, and the cinder grade of uranium may remain in less than 0.02%, and the leaching rate of molybdenum is up to 80%.
Description of the drawings
Fig. 1 is a kind of method flow diagram for improving uranium molybdenum ore leaching rate of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings with specific embodiment to a kind of side for improving uranium molybdenum ore leaching rate of the present invention
Method is further described.
Embodiment 1：
Uranium molybdenum ore raw ore uranium grade 0.155%, molybdenum grade 0.952%.
Comprised the steps using method of the present invention：
(1) mill is broken：It is milled to broken for uranium molybdenum ore below -60 mesh of granularity.
(2) first step alkaline Leaching：Alkaline Leaching is carried out to step (1) gained uranium molybdenum ore, is added
Leaching agent and oxidant stirring pulping, leaching agent are 3: 1 with the liquid-solid ratio of uranium molybdenum ore, and extraction temperature is
40 DEG C, leach 4 hours；Described leaching agent is sodium carbonate liquor, and wherein sodium carbonate quality is uranium molybdenum ore
The 13% of stone quality；Oxidant is potassium permanganate, wherein potassium permanganate quality for uranium molybdenum ore quality 1%；
After leaching, solid-liquid separation obtains alkali leaching liquor and a leached mud.
(3) second step acid system is leached：Acid system leaching is carried out to leached mud of step (2) gained, plus
The liquid-solid ratio for entering leaching agent and oxidant stirring pulping, leaching agent and a leached mud is 3: 1, leaches temperature
Spend for 40 DEG C, leach 4 hours；Leaching agent is sulfuric acid solution, and wherein sulphuric acid quality is once leaching slag
The 10% of amount；Oxidant is pyrolusite, and wherein pyrolusite quality is the 2% of a leached mud quality；Solid-liquid
Isolated acid leaching liquor and secondary leached mud.
Above-mentioned alkali leaching liquor and acid leaching liquor enter subsequent processing and carry out uranium, molybdenum element recovery；To secondary leaching
Slagging tap in tailings storehouse of be re-fed into after being washed using sour water.
The cinder grade 0.014% of final uranium, slag meter leaching rate 90.97%, molybdenum cinder grade 0.189%, slag meter
Leaching rate 80.15%.
Embodiment 2
Uranium molybdenum ore raw ore uranium grade 0.155%, molybdenum grade 0.952%.
As shown in figure 1, being comprised the steps using method of the present invention：
(1) mill is broken：It is milled to broken for uranium molybdenum ore below -60 mesh of granularity.
(2) first step alkaline Leaching：Alkaline Leaching is carried out to step (1) gained uranium molybdenum ore, is added
Leaching agent and oxidant stirring pulping, leaching agent are 2: 1 with the liquid-solid ratio of uranium molybdenum ore, and extraction temperature is
30 DEG C, leach 8 hours；Described leaching agent is solution of potassium carbonate, and wherein potassium carbonate quality is uranium molybdenum ore
The 10% of stone quality；Oxidant is potassium permanganate, and wherein potassium permanganate quality is uranium molybdenum ore quality
1.5%；After leaching, solid-liquid separation obtains alkali leaching liquor and a leached mud.
(3) second step acid system is leached：Acid system leaching is carried out to leached mud of step (2) gained, plus
The liquid-solid ratio for entering leaching agent and oxidant stirring pulping, leaching agent and a leached mud is 2: 1, leaches temperature
Spend for 30 DEG C, leach 8 hours；Leaching agent is sulfuric acid solution, and wherein sulphuric acid quality is once leaching slag
The 15% of amount；Oxidant is pyrolusite, and wherein pyrolusite quality is the 4% of a leached mud quality；Solid-liquid
Isolated acid leaching liquor and secondary leached mud.
Above-mentioned alkali leaching liquor and acid leaching liquor enter subsequent processing and carry out uranium, molybdenum element recovery；
Tailings storehouse is re-fed into secondary leached mud after washing using sour water；Wherein, PH≤1.5 of sour water,
Sour water consumption is 5: 1 with the liquid-solid ratio of secondary leached mud；Gained wash water is added after sulphuric acid as step (3)
The leaching agent that second step acid system is leached.
The cinder grade 0.020% of final uranium, slag meter leaching rate 87.10%, molybdenum cinder grade 0.173%, slag meter
Leaching rate 81.83%.
Embodiment 3
Uranium molybdenum ore raw ore uranium grade 0.155%, molybdenum grade 0.952%.
As shown in figure 1, being comprised the steps using method of the present invention：
(1) mill is broken：It is milled to broken for uranium molybdenum ore below -60 mesh of granularity.
(2) first step alkaline Leaching：Alkaline Leaching is carried out to step (1) gained uranium molybdenum ore, is added
Leaching agent and oxidant stirring pulping, leaching agent are 5: 1 with the liquid-solid ratio of uranium molybdenum ore, and extraction temperature is
50 DEG C, leach 2 hours；Described leaching agent is sodium hydroxide solution, and wherein sodium hydroxide quality is uranium
The 8% of molybdenum ore quality；Oxidant is potassium permanganate, and wherein potassium permanganate quality is uranium molybdenum ore quality
3%；After leaching, solid-liquid separation obtains alkali leaching liquor and a leached mud；
(3) second step acid system is leached：Acid system leaching is carried out to leached mud of step (2) gained, plus
The liquid-solid ratio for entering leaching agent and oxidant stirring pulping, leaching agent and a leached mud is 5: 1, leaches temperature
Spend for 50 DEG C, leach 2 hours；Leaching agent is sulfuric acid solution, and wherein sulphuric acid quality is once leaching slag
The 20% of amount；Oxidant is pyrolusite, and wherein pyrolusite quality is the 6% of a leached mud quality；Solid-liquid
Isolated acid leaching liquor and secondary leached mud；
Above-mentioned alkali leaching liquor and acid leaching liquor enter subsequent processing and carry out uranium, molybdenum element recovery；
Tailings storehouse is re-fed into secondary leached mud after washing using sour water；Wherein, PH≤1.5 of sour water,
Sour water consumption is 3: 1 with the liquid-solid ratio of secondary leached mud；Gained wash water is added after sulphuric acid as step (3)
The leaching agent that second step acid system is leached.
The cinder grade 0.020% of final uranium, slag meter leaching rate 87.10%, molybdenum cinder grade 0.170%, slag meter
Leaching rate 82.14%.
Embodiment 4
Uranium molybdenum ore raw ore uranium grade 0.155%, molybdenum grade 0.952%.
Comprised the steps using method of the present invention：
(1) mill is broken：It is milled to broken for uranium molybdenum ore below -60 mesh of granularity.
(2) first step alkaline Leaching：Alkaline Leaching is carried out to step (1) gained uranium molybdenum ore, is added
Leaching agent and oxidant stirring pulping, leaching agent are 2: 1 with the liquid-solid ratio of uranium molybdenum ore, and extraction temperature is
40 DEG C, leach 4 hours；Described leaching agent is potassium hydroxide solution, and wherein potassium hydroxide quality is uranium
The 15% of molybdenum ore quality；Oxidant is hydrogen peroxide, wherein dioxygen water quality for uranium molybdenum ore quality 2%；
After leaching, solid-liquid separation obtains alkali leaching liquor and a leached mud；
(3) second step acid system is leached：Acid system leaching is carried out to leached mud of step (2) gained, plus
The liquid-solid ratio for entering leaching agent and oxidant stirring pulping, leaching agent and a leached mud is 2: 1, leaches temperature
Spend for 50 DEG C, leach 2 hours；Leaching agent is sulfuric acid solution, and wherein sulphuric acid quality is once leaching slag
The 30% of amount；Oxidant is hydrogen peroxide, and dioxygen water quality is the 10% of a leached mud quality；Solid-liquid point
From obtaining acid leaching liquor and secondary leached mud；
Above-mentioned alkali leaching liquor and acid leaching liquor enter subsequent processing and carry out uranium, molybdenum element recovery；Secondary leaching
Slag sends into tailings storehouse.
The cinder grade 0.018% of final uranium, slag meter leaching rate 88.39%, molybdenum cinder grade 0.180%, slag meter
Leaching rate 81.09%.
Embodiment 5
Uranium molybdenum ore raw ore uranium grade 0.117%, molybdenum grade 0.808%.
Comprised the steps using method of the present invention：
(1) mill is broken：It is milled to broken for uranium molybdenum ore below -60 mesh of granularity.
(2) first step alkaline Leaching：Alkaline Leaching is carried out to step (1) gained uranium molybdenum ore, is added
Leaching agent and oxidant stirring pulping, leaching agent are 4: 1 with the liquid-solid ratio of uranium molybdenum ore, and extraction temperature is
60 DEG C, leach 3 hours；Described leaching agent is sodium carbonate and sodium bicarbonate mixed solution, wherein carbonic acid
Sodium quality for uranium molybdenum ore quality 10%, sodium bicarbonate quality for uranium molybdenum ore quality 3%；Oxidant
For potassium permanganate, potassium permanganate quality for uranium molybdenum ore quality 1%；After leaching, solid-liquid separation obtains alkali leaching
Go out liquid and a leached mud；
(3) second step acid system is leached：Acid system leaching is carried out to leached mud of step (2) gained, plus
The liquid-solid ratio for entering leaching agent and oxidant stirring pulping, leaching agent and a leached mud is 4: 1, leaches temperature
Spend for 60 DEG C, leach 3 hours；Leaching agent is sulfuric acid solution, and wherein sulphuric acid quality is once leaching slag
The 3% of amount；Oxidant is potassium permanganate, and wherein potassium permanganate quality is the 1% of a leached mud quality；
Solid-liquid separation obtains acid leaching liquor and secondary leached mud；
Above-mentioned alkali leaching liquor and acid leaching liquor enter subsequent processing and carry out uranium, molybdenum element recovery；Secondary leaching
Slag sends into tailings storehouse.
The cinder grade 0.011% of final uranium, slag meter leaching rate 90.60%, molybdenum cinder grade 0.144%, slag meter
Leaching rate 82.18%.
Embodiment 6
Uranium molybdenum ore raw ore uranium grade 0.117%, molybdenum grade 0.808%.
Comprised the steps using method of the present invention：
(1) mill is broken：It is milled to broken for uranium molybdenum ore below -60 mesh of granularity.
(2) first step alkaline Leaching：Alkaline Leaching is carried out to step (1) gained uranium molybdenum ore, is added
Leaching agent and oxidant stirring pulping, leaching agent are 2: 1 with the liquid-solid ratio of uranium molybdenum ore, and extraction temperature is
80 DEG C, leach 1 hour；Described leaching agent is sodium hydroxide, and wherein sodium hydroxide quality is uranium molybdenum ore
The 1% of stone quality；Oxidant is hydrogen peroxide, and dioxygen water quality is the 1% of uranium molybdenum ore quality；After leaching
Solid-liquid separation obtains alkali leaching liquor and a leached mud；
(3) second step acid system is leached：Acid system leaching is carried out to leached mud of step (2) gained, plus
The liquid-solid ratio for entering leaching agent and oxidant stirring pulping, leaching agent and a leached mud is 2: 1, leaches temperature
Spend for 90 DEG C, leach 1 hour；Leaching agent is sulfuric acid solution, and wherein sulphuric acid quality is once leaching slag
The 10% of amount；Oxidant is pyrolusite, and wherein pyrolusite quality is the 10% of a leached mud quality；Gu
The isolated acid leaching liquor of liquid and secondary leached mud；
Above-mentioned alkali leaching liquor and acid leaching liquor enter subsequent processing and carry out uranium, molybdenum element recovery；
Tailings storehouse is re-fed into secondary leached mud after washing using sour water；Wherein, PH≤1.5 of sour water,
Sour water consumption is 3: 1 with the liquid-solid ratio of secondary leached mud；Gained wash water is added after sulphuric acid as step (3)
The leaching agent that second step acid system is leached.
The cinder grade 0.018% of final uranium, slag meter leaching rate 84.62%, molybdenum cinder grade 0.132%, slag meter
Leaching rate 83.66%.
Embodiment 7
Uranium molybdenum ore raw ore uranium grade 0.117%, molybdenum grade 0.808%.
Comprised the steps using method of the present invention：
(1) mill is broken：It is milled to broken for uranium molybdenum ore below -60 mesh of granularity.
(2) first step alkaline Leaching：Alkaline Leaching is carried out to step (1) gained uranium molybdenum ore, is added
Leaching agent and oxidant stirring pulping, leaching agent are 1: 1 with the liquid-solid ratio of uranium molybdenum ore, and extraction temperature is
Room temperature, leaches 5 hours；Described leaching agent is sodium hydroxide, and wherein sodium hydroxide quality is uranium molybdenum ore
The 8% of stone quality；Oxidant is potassium permanganate, wherein potassium permanganate quality for uranium molybdenum ore quality 1.5%；
After leaching, solid-liquid separation obtains alkali leaching liquor and a leached mud；
(3) second step acid system is leached：Acid system leaching is carried out to leached mud of step (2) gained, plus
The liquid-solid ratio for entering leaching agent and oxidant stirring pulping, leaching agent and a leached mud is 1: 1, leaches temperature
Spend for room temperature, leaching 5 hours；Leaching agent is sulfuric acid solution, and wherein sulphuric acid quality is once leaching slag
The 15% of amount；Oxidant is hydrogen peroxide, and wherein dioxygen water quality is the 5% of a leached mud quality；Solid-liquid
Isolated acid leaching liquor and secondary leached mud；
Above-mentioned alkali leaching liquor and acid leaching liquor enter subsequent processing and carry out uranium, molybdenum element recovery；
Tailings storehouse is re-fed into secondary leached mud after washing using sour water；Wherein, PH≤1.5 of sour water,
Sour water consumption is 1: 1 with the liquid-solid ratio of secondary leached mud；Gained wash water is added after sulphuric acid as step (3)
The leaching agent that second step acid system is leached.
The cinder grade 0.019% of final uranium, slag meter leaching rate 83.76%, molybdenum cinder grade 0.162%, slag meter
Leaching rate 79.95%.
The inventive method is directed to the characteristics of sulfide-oxidation current potential is relatively low in alkaline environment, first with alkalescence leaching
Go out reagent and oxidant to be reacted with raw ore in advance, oxidation is cracked and separates sulfide, is got through diffusion admittance, is made
Uranium molybdenum ore thing therein fully exposes, while leaching section uranium molybdenum, to reduce follow-up reagent consumption.
Then recycle the high oxidation potential of acid medium oxidant, add acidic leaching reagent and oxidant with upper
Leached mud secondary response again is stated, the remaining hardly possible of the molten leaching of emphasis oxidation soaks mineral, to improve leaching rate, final uranium
Cinder grade is maintained at less than 0.02%, and the leaching rate of molybdenum can reach more than 80%.This method avoid difficulty
Reason chlorine root and the introducing of nitrate anion, with equipment investment is few, uranium molybdenum leaching rate high, oxidant consumption is few,
Advantages of environment protection.
Claims (4)
1. a kind of improve uranium molybdenum ore leaching rate method, it is characterised in that the method comprises the steps：
(1) mill is broken：It is milled to broken for uranium molybdenum ore below -60 mesh of granularity；
(2) first step alkaline Leaching：Alkaline Leaching is carried out to step (1) gained uranium molybdenum ore, is added
Leaching agent and oxidant stirring pulping, leaching agent are (1～5) with the liquid-solid ratio of uranium molybdenum ore: 1, leach
Temperature be room temperature～80 DEG C, extraction time 1～8 hour；Described leaching agent is sodium hydroxide, hydroxide
Potassium, sodium carbonate or solution of potassium carbonate, wherein sodium hydroxide, potassium hydroxide, sodium carbonate or potassium carbonate quality
For uranium molybdenum ore quality 1～15%；Oxidant is potassium permanganate or hydrogen peroxide, wherein potassium permanganate quality
For the 0.2～3% of uranium molybdenum ore quality, dioxygen water quality for uranium molybdenum ore quality 1～15%；After leaching
Solid-liquid separation obtains alkali leaching liquor and a leached mud；
(3) second step acid system is leached：Acid system leaching is carried out to leached mud of step (2) gained, plus
The liquid-solid ratio for entering leaching agent and oxidant stirring pulping, leaching agent and a leached mud is (1～5): 1,
Extraction temperature is room temperature～90 DEG C, leaches 1～8 hour；Leaching agent is sulfuric acid solution, wherein sulphuric acid quality
For a leached mud quality 3～30%；Oxidant be potassium permanganate, hydrogen peroxide or pyrolusite, wherein high
Potassium manganate quality is the 0.2～3% of a leached mud quality, and dioxygen water quality is a leached mud quality
1～15%, pyrolusite quality is the 1～10% of a leached mud quality；Solid-liquid separation obtains acid leaching liquor
With secondary leached mud；
Above-mentioned alkali leaching liquor and acid leaching liquor enter subsequent processing and carry out uranium, molybdenum element recovery；Secondary leaching
Slag sends into tailings storehouse.
2. according to claim 1 a kind of improve uranium molybdenum ore leaching rate method, it is characterised in that：
Tailings storehouse is re-fed into secondary leached mud after washing using sour water；PH≤1.5 of wherein sour water, acid
Water consumption is (1～5) with the liquid-solid ratio of secondary leached mud: 1；Gained wash water is added after sulphuric acid as step
(3) leaching agent that second step acid system is leached.
3. according to claim 1 a kind of improve uranium molybdenum ore leaching rate method, it is characterised in that：
First step alkaline Leaching described in step (2), the preferred sodium hydroxide of leaching agent or sodium carbonate liquor, oxidation
The preferred potassium permanganate of agent or hydrogen peroxide.
4. according to claim 1 a kind of improve uranium molybdenum ore leaching rate method, it is characterised in that：
Second step acid system leaching described in step (3), the preferred pyrolusite of oxidant or hydrogen peroxide.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN107739851A (en) * | 2017-09-15 | 2018-02-27 | 核工业北京化工冶金研究院 | A kind of method of coated uranium molybdenum ore oxidizing roasting Strengthen education extraction uranium molybdenum |
| CN107760889A (en) * | 2017-09-15 | 2018-03-06 | 核工业北京化工冶金研究院 | A kind of method for improving coated uranium molybdenum ore acidic leaching slurry filtration performance |
| CN109593956A (en) * | 2018-12-10 | 2019-04-09 | 核工业北京化工冶金研究院 | A kind of enriching apparatus and method of uranium solution |
| CN109593956B (en) * | 2018-12-10 | 2020-08-21 | 核工业北京化工冶金研究院 | Uranium solution enrichment device and method |
| CN110714119A (en) * | 2018-12-19 | 2020-01-21 | 中核沽源铀业有限责任公司 | Oxygen pressure acid leaching industrialization method for primary uranium molybdenum ore |
| CN110714119B (en) * | 2018-12-19 | 2021-09-17 | 中核沽源铀业有限责任公司 | Oxygen pressure acid leaching industrialization method for primary uranium molybdenum ore |
| CN109517970A (en) * | 2018-12-21 | 2019-03-26 | 金堆城钼业股份有限公司 | A kind of method of potassium element and wolfram element content in reduction molybdenite |
| CN110983058A (en) * | 2019-12-06 | 2020-04-10 | 核工业北京化工冶金研究院 | Method for leaching uranium in refractory coal fly ash by countercurrent washing alkali method |
| CN112430754A (en) * | 2020-11-04 | 2021-03-02 | 南华大学 | Method for leaching uranium from multi-sulfide carbonate type uranium ore through high-temperature pressurized alkaline leaching |
| CN114653739A (en) * | 2022-04-13 | 2022-06-24 | 中国人民解放军63653部队 | Method for removing uranium in gravel-containing original rock loose sandy soil |
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