CN101225481B - Metallurgical extraction method of molybdenum-tungsten oxide bulk concentrate - Google Patents
Metallurgical extraction method of molybdenum-tungsten oxide bulk concentrate Download PDFInfo
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Abstract
The invention discloses a metallurgy extraction method of molybdenum-tungsten oxide ore bulk concentrate. The process takes molybdenum-tungsten oxide ore as a raw material, uses acid to leach, and filter residue is rough concentrate containing tungsten after filtration; adding a certain amount of oxidant into the filtrate to oxidize the molybdenum blue into high-valence molybdenum, then carrying out neutralization precipitation, filtering, drying and roasting the obtained precipitate to obtain a molybdenum oxide product containing more than or equal to 50% of molybdenum. The process has simple operation and high recovery rate, and realizes the separation of molybdenum and tungsten preliminarily. Has the following advantages and effects: 1. the recovery rate is high, the process has simple procedures and few steps, and the total recovery rate of molybdenum is kept between 85 and 95 percent. 2. The separation of tungsten and molybdenum is realized. In the process, because the solubility difference of molybdenum and tungsten in acid is very large, the tungsten content in the obtained molybdenum trioxide product is less than or equal to 0.75 percent, and the molybdenum content in leaching residues is less than or equal to 0.7 percent, thereby better realizing the separation of tungsten and molybdenum.
Description
Technical field
The present invention relates to a kind of metallurgical extraction method, especially relate to a kind of metallurgical extraction method of molybdenum-tungsten oxide bulk concentrate.
Background technology
Molybdenum, tungsten resource are China's superior resources mineral, and the molybdenum resource reserve of China, exploitation amount of finish, volume of trade occupy an important position in the world.The occurring in nature molybdenum mainly exists with molybdenum glance sulfides form, and other a spot of molybdenum then exists with oxidized ore forms such as molybdine molybdite, molybdenum calcium ore deposit, powellite, yellow lead ores.
Very ripe to the ore dressing of sulphide ores, metallurgical treatment process, and select the utilization of complicated aluminium mineral still to be in the exploratory stage for some difficulties.Particularly the oxidizing molybdenum ore resource reserve is few, has independent molybdenum oxide mineral deposit hardly, but all has a certain amount of molybdenum oxide ore in China main molybdenum ore district, does not have to recycle because of developing difficulty.External only USSR (Union of Soviet Socialist Republics) mining industry institute has carried out the experimental study and the commerical test of oxidized ore, but fails to carry out industrial implementation owing to cost recovery height, technico-economical comparison are low; U.S. gram Lai Maikesi company and China's Luanchuan molybdenum ore only carried out preliminary experimental study to local oxygen enrichment molybdenum ore, but still untapped utilization.
Summary of the invention
Purpose of the present invention just is on the basis of molybdenum tungsten oxidized ore beneficiation new process flow process, its molybdenum tungsten concentrate of selecting is handled, reach and improve two kinds of metals grade and the isolating purpose of aluminium tungsten in concentrate separately respectively, thereby a kind of metallurgical extraction method of molybdenum-tungsten oxide bulk concentrate is provided.
Purpose of the present invention can realize by following measure:
Technology of the present invention mainly comprises leaching, oxidation, neutralization and four steps of roasting, and technical process is as follows:
A, leaching
With molybdenum tungsten oxidized ore is raw material, in the steel basin that is coated with the acid-proof liner, adding acid leaches, liquid-solid ratio after the control adding acid is between 1: 1～1: 3.5, and acid concentration is controlled at 50～350g/L, and extraction temperature is 20～90 ℃, reaction times is 1～10h, react the after-filtration that finishes, molybdenum content is 80～120g/L in the filtrate, is the thick tungsten concentrate that W content is improved through the filter residue that washs;
B, oxidation
Add oxygenant the low price molybdenum is oxidized to the high price molybdenum, oxygenant is 1-10 with the parts by weight of raw materials ratio: 100;
C, neutralization
The control neutral temperature is at 20～70 ℃, under stirring condition, with concentration be 10～20% ammonium salt class alkaline substance or ammoniacal liquor join lentamente that oxidation finishes contain in the molybdenum solution control terminal point pH=1.0～2.5, behind reaction 1～5h, can obtain the throw out of pistac;
D, roasting
After the throw out drying after the filtration, under 350～550 ℃ temperature, carry out roasting, can obtain molybdenum content and be 50%～60% molybdic oxide product.
Among the present invention in the raw material molybdenum tungsten oxidized ore existence form of Mo be mainly molybdine molybdite and calcium molybdate, molybdenum content 〉=3%, ore grain size reach-100 order 〉=70%.Acid is one or more mixtures in hydrochloric acid, nitric acid, sulfuric acid, the phosphoric acid in the steps A.Oxygenant can be one or more mixtures in hydrogen peroxide, Manganse Dioxide, potassium permanganate, nitric acid or the nitrate among the step B.Ammonium salt class alkaline substance includes bicarbonate of ammonia or urea among the step C.Ammonia concn is 10～20% among the step C.
The present invention is owing to adopt the aforesaid method step, and advantage and effect that it has are as follows:
1. rate of recovery height
This technique process is simple, step is few, and the total yield of molybdenum is remaining between 85～95%.
2. realized the tungsten separation
In this technological process, because molybdenum, the difference in solubility of tungsten in acid are very big, W content≤0.75% in the molybdic oxide product that obtains, molybdenum content≤0.7% in the leached mud has been realized the tungsten separation preferably.
Description of drawings
Accompanying drawing is a process flow sheet of the present invention;
Embodiment
The present invention does with detailed description below in conjunction with drawings and Examples:
Embodiment 1
As shown in the figure, technology of the present invention comprises leaching, oxidation, neutralization and four steps of roasting, and technical process is as follows:
A, leaching
With molybdenum tungsten oxidized ore is raw material, in the steel basin that is coated with the acid-proof liner, adding acid leaches, liquid-solid ratio after the control adding acid is between 1: 1, and acid concentration is controlled at 50g/L, and extraction temperature is between 20 ℃, reaction times is 1h, react the after-filtration that finishes, molybdenum content is 80g/L in the filtrate, is the thick tungsten concentrate that W content is improved through the filter residue that washs;
B, oxidation
Add oxygenant the low price molybdenum is oxidized to the high price molybdenum, oxygenant is 1: 100 with the parts by weight of raw materials ratio;
C, neutralization
The control neutral temperature is at 20 ℃, under stirring condition, is that 10% ammonium salt class alkaline substance or ammoniacal liquor join containing in the molybdenum solution that oxidation finishes lentamente with concentration, and control terminal point pH=1.0 behind the reaction 1h, can obtain the throw out of pistac;
D, roasting
After the throw out drying after the filtration, under 350 ℃ temperature, carry out roasting, can obtain molybdenum content and be 50% molybdic oxide product.
Among the present invention in the raw material molybdenum tungsten oxidized ore existence form of Mo be mainly molybdine molybdite and calcium molybdate, molybdenum content 〉=3%, ore grain size reach-100 order 〉=70%.Acid is one or more mixtures in hydrochloric acid, nitric acid, sulfuric acid, the phosphoric acid in the steps A.Oxygenant can be one or more mixtures in hydrogen peroxide, Manganse Dioxide, potassium permanganate, nitric acid or the nitrate among the step B.Ammonium salt class alkaline substance includes bicarbonate of ammonia or urea among the step C.Ammonia concn is 10% among the step C.
Embodiment 2
As shown in the figure, technology of the present invention mainly comprises leaching, oxidation, neutralization and four steps of roasting, and technical process is as follows:
A, leaching
With molybdenum tungsten oxidized ore is raw material, in the steel basin that is coated with the acid-proof liner, adding acid leaches, liquid-solid ratio after the control adding acid is between 1: 2, and acid concentration is controlled at 100g/L, and extraction temperature is between 30 ℃, reaction times is 3h, react the after-filtration that finishes, molybdenum content is 90g/L in the filtrate, is the thick tungsten concentrate that W content is improved through the filter residue that washs;
B, oxidation
Add oxygenant the low price molybdenum is oxidized to the high price molybdenum, oxygenant is 2: 100 with the parts by weight of raw materials ratio;
C, neutralization
The control neutral temperature is at 30 ℃, under stirring condition, is that 12% ammonium salt class alkaline substance or ammoniacal liquor join containing in the molybdenum solution that oxidation finishes lentamente with concentration, and control terminal point pH=1.3 behind the reaction 2h, can obtain the throw out of pistac;
D, roasting
After the throw out drying after the filtration, under 380 ℃ temperature, carry out roasting, can obtain aluminium content and be 52%% molybdic oxide product.
Among the present invention in the raw material molybdenum tungsten oxidized ore existence form of Mo be mainly molybdine molybdite and calcium molybdate, molybdenum content 〉=3%, ore grain size reach-100 order 〉=70%.Acid is one or more mixtures in hydrochloric acid, nitric acid, sulfuric acid, the phosphoric acid in the steps A.Oxygenant can be one or more mixtures in hydrogen peroxide, Manganse Dioxide, potassium permanganate, nitric acid or the nitrate among the step B.Ammonium salt class alkaline substance includes bicarbonate of ammonia or urea among the step C.Ammonia concn is 12% among the step C.
Embodiment 3
As shown in the figure, technology of the present invention mainly comprises leaching, oxidation, neutralization and four steps of roasting, and technical process is as follows:
A, leaching
With molybdenum tungsten oxidized ore is raw material, in the steel basin that is coated with the acid-proof liner, adding acid leaches, control add after the acid liquid-solid ratio 1: 2～between, acid concentration is controlled at 150g/L, extraction temperature is between 50 ℃, reaction times is 5h, react the after-filtration that finishes, molybdenum content is 100g/L in the filtrate, is the thick tungsten concentrate that W content is improved through the filter residue that washs;
B, oxidation
Add oxygenant the low price molybdenum is oxidized to the high price molybdenum, oxygenant is 5: 100 with the parts by weight of raw materials ratio;
C, neutralization
The control neutral temperature is at 40 ℃, under stirring condition, is that 15% ammonium salt class alkaline substance or ammoniacal liquor join containing in the molybdenum solution that oxidation finishes lentamente with concentration, and control terminal point pH=～2.0 behind the reaction 3h, can obtain the throw out of pistac;
D, roasting
After the throw out drying after the filtration, under 500 ℃ temperature, carry out roasting, can obtain molybdenum content and be 55% molybdic oxide product.
Among the present invention in the raw material molybdenum tungsten oxidized ore existence form of Mo be mainly molybdine molybdite and calcium molybdate, molybdenum content 〉=3%, ore grain size reach-100 order 〉=70%.Acid is one or more mixtures in hydrochloric acid, nitric acid, sulfuric acid, the phosphoric acid in the steps A.Oxygenant can be one or more mixtures in hydrogen peroxide, Manganse Dioxide, potassium permanganate, nitric acid or the nitrate among the step B.Ammonium salt class alkaline substance includes bicarbonate of ammonia or urea among the step C.Ammonia concn is 15% among the step C.
Embodiment 4
As shown in the figure, technology of the present invention mainly comprises leaching, oxidation, neutralization and four steps of roasting, and technical process is as follows:
A, leaching
With molybdenum tungsten oxidized ore is raw material, in the steel basin that is coated with the acid-proof liner, adding acid leaches, liquid-solid ratio after the control adding acid is between 1: 3.2, and acid concentration is controlled at 300g/L, and extraction temperature is between 80 ℃, reaction times is 8h, react the after-filtration that finishes, molybdenum content is 110g/L in the filtrate, is the thick tungsten concentrate that W content is improved through the filter residue that washs;
B, oxidation
Add oxygenant the low price molybdenum is oxidized to the high price molybdenum, oxygenant is 8: 100 with the parts by weight of raw materials ratio;
C, neutralization
The control neutral temperature is at 60 ℃, under stirring condition, is that 18% ammonium salt class alkaline substance or ammoniacal liquor join containing in the molybdenum solution that oxidation finishes lentamente with concentration, and control terminal point pH=2.3 behind the reaction 4h, can obtain the throw out of pistac;
D, roasting
After the throw out drying after the filtration, under 520 ℃ temperature, carry out roasting, can obtain molybdenum content and be 58% molybdic oxide product.
Among the present invention in the raw material molybdenum tungsten oxidized ore existence form of Mo be mainly molybdine molybdite and calcium molybdate, molybdenum content 〉=3%, ore grain size reach-100 order 〉=70%.Acid is one or more mixtures in hydrochloric acid, nitric acid, sulfuric acid, the phosphoric acid in the steps A.Oxygenant can be one or more mixtures in hydrogen peroxide, Manganse Dioxide, potassium permanganate, nitric acid or the nitrate among the step B.Ammonium salt class alkaline substance includes bicarbonate of ammonia or urea among the step C.Ammonia concn is 18% among the step C.
Embodiment 5
As shown in the figure, technology of the present invention mainly comprises leaching, oxidation, neutralization and four steps of roasting, and technical process is as follows:
A, leaching
With molybdenum tungsten oxidized ore is raw material, in the steel basin that is coated with the acid-proof liner, adding acid leaches, liquid-solid ratio after the control adding acid is between 1: 3.5, and acid concentration is controlled at 350g/L, and extraction temperature is between 90 ℃, reaction times is 10h, react the after-filtration that finishes, molybdenum content is 120g/L in the filtrate, is the thick tungsten concentrate that W content is improved through the filter residue that washs;
B, oxidation
Add oxygenant the low price molybdenum is oxidized to the high price molybdenum, oxygenant is 10: 100 with the parts by weight of raw materials ratio;
C, neutralization
The control neutral temperature is at 70 ℃, under stirring condition, is that 20% ammonium salt class alkaline substance or ammoniacal liquor join containing in the molybdenum solution that oxidation finishes lentamente with concentration, and control terminal point pH=2.5 behind the reaction 5h, can obtain the throw out of pistac;
D, roasting
After the throw out drying after the filtration, under 550 ℃ temperature, carry out roasting, can obtain aluminium content and be 60% molybdic oxide product.
Among the present invention in the raw material molybdenum tungsten oxidized ore existence form of Mo be mainly molybdine molybdite and calcium molybdate, molybdenum content 〉=3%, ore grain size reach-100 order 〉=70%.Acid is one or more mixtures in hydrochloric acid, nitric acid, sulfuric acid, the phosphoric acid in the steps A.Oxygenant can be one or more mixtures in hydrogen peroxide, Manganse Dioxide, potassium permanganate, nitric acid or the nitrate among the step B.Ammonium salt class alkaline substance includes bicarbonate of ammonia or urea among the step C.Ammonia concn is 20% among the step C.
Embodiment 6
Ore dressing mixing molybdenum tungsten concentrate
Raw material main chemical compositions: Mo7～12%, WO
36～8%, the existence form of Mo is mainly molybdine molybdite and calcium molybdate, and tungsten is that the form with calcium salt and tungstic oxide exists.
Purpose of the present invention is exactly to improve molybdenum and tungsten grade to a certain extent, realizes that tentatively molybdenum, tungsten separate, and becomes utilizable high-grade ore mixing the ore deposit, improves the utilization ratio of resource.The present invention mainly is applicable to molybdenum tungsten mixed oxidization ore deposit, and the existence form of Mo is mainly molybdine molybdite and calcium molybdate, molybdenum content 〉=3%.Its technology mainly comprises leaching, oxidation, neutralization and four steps of roasting, and following being described in detail done in concrete technical process respectively:
1. leach
Reaching-100 orders 〉=70% collective concentrate with granularity is raw material, in the steel basin that is coated with the PE liner, adds concentrated hydrochloric acid and leaches, liquid-solid ratio behind the control adding hydrochloric acid is between 1: 1～1: 3.5 (as 1: 2,1: 2.5), and acid concentration is controlled at 50～350g/L (as 50,70,120,260,330 etc.), extraction temperature be 20～90 ℃ (as 25,30,40,60,80 etc.) between, reaction times be 1～5h (as 1,2,3,4,5 etc.), react the after-filtration that finishes, molybdenum content is that 80～120g/L is (as 80 in the filtrate, 90,100,105,115 etc.), the filter residue through twice washing is the thick tungsten concentrate that W content is improved.
2. oxidation
Owing to contain a certain amount of medicament and low price iron in the sample ore with reductibility, in leaching process, make a part of molybdenum be reduced, exist with lower valency.The low price molybdenum is difficult in N-process and separates out with the form of molybdic acid, therefore, needs to add a certain amount of oxygenant and be oxidized to molybdenum at high price to the low price molybdenum.Oxygenant can be selected hydrogen peroxide, Manganse Dioxide, potassium permanganate, nitric acid or nitrate, and solution becomes little green transparent solution by mazarine and can be used as oxygenant adding terminal point, and the oxygenant add-on is too much, very few, all will cause productive rate to reduce.
3. neutralization
Control neutral temperature 20～70 ℃ (as 25,30,40,50,60,65 etc.), having under the condition of stirring, is 10～20% (as 10 with concentration, 12,15,18 etc.) industrial ammonia joins containing in the molybdenum solution that oxidation finishes lentamente, control terminal point pH=1.5～2.5 (as 1.1,1.3,1.5.2.0.2.3 etc.), reaction 1～5h (as 1,2,3,4,5 etc.) after, can obtain the throw out of pistac.
4. roasting
Throw out after the filtration carries out roasting under the temperature of 350～550 ℃ (as 350,400,450,480,530 etc.) after 105 ℃ of oven dry, can obtain molybdenum content is the molybdic oxide product of 50%～60% (as 50,52,55,58,60 etc.).
Main processes is raw material, water, hydrochloric acid to be mixed according to the above ratio (can get each point value in each parameter area value as required), leaches under stirring condition, leaches finish after-filtration, washing, and filter residue is the tungsten ore that has separated molybdenum; Filtrate adds the ammoniacal liquor neutralization after oxidation, obtain the throw out based on molybdic acid after sedimentation, the filtration, obtains containing the product of Mo 〉=50% after oven dry, the roasting.
Concrete technical qualification are as follows:
Raw material granularity :-100 orders 〉=83%; Extraction temperature: 50 ℃; Extraction time: 2.5h; Liquid-solid ratio: 1.5: 1; Oxygenant: nitric acid; About terminal point pH:2.0; In and afterreaction time: 1h; Maturing temperature: 350 ℃
Claims (5)
1. the metallurgical extraction method of a molybdenum-tungsten oxide bulk concentrate, it is characterized in that: present method technology mainly comprises leaching, oxidation, neutralization and four steps of roasting, and technical process is as follows:
A, leaching
With molybdenum tungsten oxidized ore is raw material, in the steel basin that is coated with the acid-proof liner, adding acid leaches, liquid-solid ratio after the control adding acid is between 1: 1～1: 3.5, and acid concentration is controlled at 50～350g/L, and extraction temperature is between 20～90 ℃, reaction times is 1～10h, react the after-filtration that finishes, molybdenum content is 80～120g/L in the filtrate, is the thick tungsten concentrate that W content is improved through the filter residue that washs;
B, oxidation
Add oxygenant the low price molybdenum is oxidized to the high price molybdenum, oxygenant is 1-10 with the parts by weight of raw materials ratio: 100;
C, neutralization
The control neutral temperature is at 20～70 ℃, under stirring condition, with concentration be 10～20% ammonium salt class alkaline substance or ammoniacal liquor join lentamente that oxidation finishes contain in the molybdenum solution control terminal point pH=1.0～2.5, behind reaction 1～5h, can obtain the throw out of pistac;
D, roasting
After the throw out drying after the filtration, under 350～550 ℃ temperature, carry out roasting, can obtain molybdenum content and be 50%～60% molybdic oxide product.
2. the metallurgical extraction method of molybdenum-tungsten oxide bulk concentrate according to claim 1, it is characterized in that: the existence form of Mo is mainly molybdine molybdite and calcium molybdate in the described raw material molybdenum tungsten oxidized ore, and molybdenum content 〉=3%, ore grain size reach-100 order 〉=70%.
3. the metallurgical extraction method of molybdenum-tungsten oxide bulk concentrate according to claim 1 and 2 is characterized in that: acid is one or more mixtures in hydrochloric acid, nitric acid, sulfuric acid, the phosphoric acid in the described steps A.
4. the metallurgical extraction method of molybdenum-tungsten oxide bulk concentrate according to claim 1 and 2, it is characterized in that: oxygenant is one or more mixtures in hydrogen peroxide, Manganse Dioxide, potassium permanganate, nitric acid or the nitrate among the described step B.
5. the metallurgical extraction method of molybdenum-tungsten oxide bulk concentrate according to claim 1 and 2, it is characterized in that: ammonium salt class alkaline substance is a bicarbonate of ammonia among the described step C.
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| CN101824533B (en) * | 2010-05-07 | 2012-02-01 | 范颖 | Method for extracting tungsten trioxide and molybdenum trioxide by pretreating tungsten-molybdenum concentrates with concentrated acid |
| DE112011104540B4 (en) * | 2010-12-24 | 2016-03-24 | Central South University | Process for extracting tungsten from scheelite |
| CN102303908A (en) * | 2011-08-19 | 2012-01-04 | 西北有色金属研究院 | Method for preparing high-solubility industrial molybdenum oxide |
| CN103255288B (en) * | 2012-02-17 | 2014-11-26 | 苏州艾默特材料技术有限公司 | Purification method of industrial molybdenum powder |
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| CN106745637A (en) * | 2016-12-07 | 2017-05-31 | 江西稀有金属钨业控股集团有限公司 | A kind of Application way of tungsten slag, using device and purposes |
| CN108677036A (en) * | 2018-05-05 | 2018-10-19 | 广西大学 | A method of it is disseminated in raw ore from molybdenum oxide particulate and directly recycles molybdenum |
| CN109554548B (en) * | 2018-12-20 | 2020-06-23 | 信丰华锐钨钼新材料有限公司 | Method for extracting tungsten and molybdenum from tungsten smelting sludge |
| CN114686683B (en) * | 2020-12-31 | 2024-01-30 | 中南大学 | Method for recycling multiple metal elements from molybdenite based on molybdenum calcine |
| CN113684378A (en) * | 2021-08-07 | 2021-11-23 | 信丰华锐钨钼新材料有限公司 | Method for improving leaching rate of tungsten and molybdenum in scheelite containing molybdenum sulfide |
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