CN103706465A - Method for selecting preconcentration vanadium from high-calcium type stone coal in flotation mode - Google Patents
Method for selecting preconcentration vanadium from high-calcium type stone coal in flotation mode Download PDFInfo
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Abstract
The invention relates to a method for selecting preconcentration vanadium from high-calcium type stone coal in a flotation mode. According to the technical scheme, high-calcium type stone coal raw ore is smashed till the grain size is smaller than 25mm, the smashed high-calcium type stone coal raw ore is decarbonized and roasted for 1 hour to 2 hours at the temperature ranging from 600 DEG C to 750 DEG C, the decarbonized and roasted high-calcium type stone coal raw ore is ground till the part, with the grain size smaller than 0.074mm, of the high-calcium type stone coal raw ore accounts for 60-80wt% of the high-calcium type stone coal raw ore, and the ground high-calcium type stone coal raw ore is classified through a hydrocyclone. Calcium roughing is conducted on the classified coarse-fraction product, calcium scavenging is then conducted on the gangue after calcium roughing, vanadium roughing is conducted on the gangue after calcium scavenging, vanadium scavenging is conducted on the gangue after vanadium roughing, and flotation is adopted for all the mineral separation processes through floatation cells. The concentrate generated after calcium roughing, the concentrate generated after calcium scavenging and the gangue generated after vanadium scavenging are combined to form the final gangue, and classified fine-fraction product, the concentrate generated after calcium roughing, the concentrate generated after calcium scavenging and the concentrate generated after vanadium scavenging are combined to form the final concentrate. The method has the advantages of being reasonable in process, good in scavenging effect, small in amount of consumed collecting agents, high in concentrate grade, small in amount of consumed acid pH regulators, and capable of remarkably reducing follow-up chemical vanadium extraction cost.
Description
Technical field
The invention belongs to flotation preenrichment vanadium technical field.Be specifically related to a kind of from high-calcium type bone coal the method for flotation preenrichment vanadium.
Background technology
Bone coal is the distinctive a kind of navajoite resource of China, wherein V
2o
5reserves are 1.18 * 10
8t is V in vanadium titano-magnetite
2o
56.7 times of reserves, account for 87% of China's vanadium resource total amount, extract an important directions of Fan Shi China vanadium resource exploitation from bone coal.Because the vanadium in China's bone coal mainly replaces the Al(III of alumina octahedral in mica mineral with isomorphous form) exist, vanadium extraction difficulty is larger, and the technique of current extracting vanadium from stone coal generally comprises the operations such as decarburization preroast, roasting, water logging/acidleach, ion cleaning, precipitation and calcining.Due to the V in bone coal
2o
5grade is low, and the overwhelming majority is between 0.13～1.2%, and in vanadium extracting process, pan feeding grade is low, treating capacity is large; In bone coal, the consumption such as calcite amount of acidic substances is high in addition, causes acid consumption cost to increase; The problem that in extracting vanadium from stone coal process, production cost is high highlights.Therefore, before chemical vanadium extraction, carry out ore dressing preenrichment, to improve the V in bone coal
2o
5grade is very necessary.
" research of the preferred coal separation Vanadium Concentrationin of high-carbon bone coal new technology " (Wu Huiling, Zhao Wei, Deng. China rare earth journal, 2008,26:530～533.) result show, existence due to fine-grained carbon mud, cover cap, at other mineral surfaces, affects collecting agent in the selective absorption of each mineral surfaces, causes flotation conditions to worsen, flotation effect can not be embodied, and is difficult to realize the separation of carbon, vanadium and other gangue mineral with conventional floatation process." a kind of beneficiation method from high-calcium type navajoite enrichment vanadic anhydride " (CN102274795A) carrys out the method for flotation calcium by thick two single-minded techniques of sweeping, indirect Vanadium Concentrationin, the method only relies on jettisoning calcium mineral that vanadium grade in concentrate is increased, and directly not containing the flotation of vanadium mineral, flotation concentrate vanadium grade is not high.The vanadium mineral that contains in bone coal is generally mica mineral, and gangue mineral is mainly quartz, calcite and feldspar etc.The amine collector of take carries out mica and quartzy, feldspar FLOTATION SEPARATION need under the acid condition that be 2～3 in pH value, carry out (Wei Yunfeng. five of Shanxi Province sericite ore dressing amine is studied [J]. North China land resources, 2007, (2): 37-38.), under this condition, pH adjusting agent can be reacted with the calcium mineral calcite in bone coal, causes consuming a large amount of pH adjusting agents.In addition, in the bone coal ore pulp high to calcic, add a large amount of acid mediums, can produce a large amount of bubbles, easily cause " race groove " phenomenon, it is large that difficulty is controlled in operation.
Summary of the invention
The present invention is intended to overcome prior art defect, object be to provide a kind of process structure rationally, good separation effect, collector dosage is few, concentrate grade is high, acid pH adjusting agent consumption is little and can significantly reduce the method for flotation preenrichment vanadium from high-calcium type bone coal of subsequent chemistry vanadium extraction cost.
For achieving the above object, the concrete steps of the technical solution used in the present invention are:
1) fragmentation: high-calcium type bone coal crushing raw ore to particle diameter is less than to 25mm.
2) decarburization roasting: the high-calcium type bone coal after fragmentation is placed in to roaster, decarburization roasting 1～2h under 600～750 ℃ of conditions.
3) ore grinding: the high-calcium type bone coal after decarburization roasting is milled to the 60～80wt% that accounts for that particle diameter is less than 0.074mm.
4) classification: the high-calcium type bone coal with hydrocyclone after to ore grinding carries out classification, obtains particle diameter and is greater than the coarse fraction product of 0.020mm and the fine fraction product that particle diameter is less than 0.020mm, and the fine fraction product that particle diameter is less than 0.020mm is final concentrate.
5) calcium is roughly selected with calcium and is scanned: the coarse fraction product that particle diameter is greater than to 0.020mm adopts flotation cell to carry out calcium and roughly selects, and the mine tailing after calcium is roughly selected adopts flotation grain to carry out calcium again and scans; The fatty acid collecting agent consumption that calcium is roughly selected middle employing is 500～1000g/t, and the fatty acid collecting agent consumption that calcium is scanned middle employing is 200～500g/t; Calcium adds waterglass as inhibitor in roughly selecting, and waterglass consumption is 100～200g/t.
6) vanadium is roughly selected with vanadium and is scanned: the mine tailing after calcium is scanned adopts flotation cell to carry out vanadium and roughly selects, and the mine tailing after vanadium is roughly selected adopts flotation cell to carry out vanadium again and scans; The amine collector consumption that vanadium is roughly selected middle employing is 50～200g/t, and the amine collector consumption that vanadium is scanned middle employing is 30～100g/t; It is 2～3 that vanadium roughly selects that the pH value of scanning middle ore pulp with vanadium all controls; Vanadium adds prodan as inhibitor in roughly selecting, and prodan consumption is 50～150g/t.
Together with mine tailing that the concentrate that the concentrate that calcium is roughly selected, calcium are scanned is scanned with vanadium merges as true tailings; Together with concentrate that the concentrate that vanadium is roughly selected is scanned with vanadium merges as final concentrate; Vanadium is roughly selected with vanadium and is scanned and in process, all adopt amine collector.
V in described high-calcium type bone coal
2o
5grade is that 0.5～1.0%, CaO content is 4～15wt%.
The carbon-drop rate of described decarburization roasting is 75～95%.
Described fatty acid collecting agent is a kind of in oleic acid, enuatrol, tall oil, oxidized paraffin wax soap.
Described amine collector is a kind of in lauryl amine, lauryl amine acetate, dodecylamine hydrochloride, ether amine.
Owing to adopting technique scheme, the present invention compared with prior art has following good effect:
1) by decarburization roasting, can significantly reduce the preferential absorption of carbonaceous to flotation collector, reduce collector dosage.
2) solve carbonaceous cover cap in the problem of each mineral surfaces, collecting agent can be shown due selective to different minerals, separating effect is enhanced.
3) decarburization roasting process can be realized the oxidation of vanadium in bone coal and turn valency, and the concentrate after preenrichment can directly leach, and process structure is reasonable; In addition, the heat that in decarburization roasting process, carbon burning produces can be used for the leaching operation of chemical vanadium extraction, simultaneously also Vanadium Concentrationin to a certain extent of the scaling loss of carbon.
4) classification operation can, by partly separating containing the high fine fraction of vanadium, also play the effect of desliming on the one hand on the other hand to follow-up flotation operation; Calcium is roughly selected with calcium and is scanned and the calcic calcite jettisoning in high-calcium type bone coal not only can be able to be improved to the grade that vanadium is roughly selected vanadium in pan feeding, and can avoid vanadium to roughly select reacting of acid pH adjusting agent and calcite, significantly reduces the consumption of acid pH adjusting agent.Because the zero point of muscovite is less than the zero point of quartzy and feldspar, under the acid condition that is 2～3 in pH value, muscovite particle surface bear point, quartz and feldspar particle surface lotus are on schedule, adopt amine cation-collecting agent under this condition, to contain vanadium muscovite good with separation selectivity quartzy, feldspar, using prodan as the inhibitor of quartzy and feldspar simultaneously, can further strengthen separating effect;
5) concentrate obtaining by flotation preenrichment, as the pan feeding of chemical vanadium extraction, can obviously reduce the treating capacity of chemical vanadium extraction, and reduces the content of the sour mineral of consumption such as calcite in pan feeding, reduces the acid consumption leaching, and can significantly reduce subsequent chemistry vanadium extraction cost.
Therefore, the present invention have technique rationally, good separation effect, collector dosage is few, concentrate grade is high, acid pH adjusting agent consumption is little, can significantly reduce the feature of subsequent chemistry vanadium extraction cost.
Accompanying drawing explanation
Fig. 1 is a kind of process chart of the present invention.
The specific embodiment
In order to understand better the present invention, below in conjunction with the drawings and specific embodiments, further illustrate content of the present invention, but content of the present invention is not only confined to the following examples.
Now the fatty acid collecting agent described in the specific embodiment and amine collector unification are described below, in embodiment, repeat no more:
Fatty acid collecting agent is a kind of in oleic acid, enuatrol, tall oil, oxidized paraffin wax soap.
Amine collector is a kind of in lauryl amine, lauryl amine acetate, dodecylamine hydrochloride, ether amine.
Embodiment 1
A kind of from high-calcium type bone coal the method for flotation preenrichment vanadium.By the method, process the high-calcium type bone coal in somewhere, Hubei, V in described high-calcium type bone coal
2o
5grade is that 0.5～0.75%, CaO content is 7～15wt%.
The concrete steps of the present embodiment are as shown in Figure 1:
1) fragmentation: high-calcium type bone coal crushing raw ore to particle diameter is less than to 25mm.
2) decarburization roasting: the high-calcium type bone coal after fragmentation is placed in to roaster, decarburization roasting 1～1.5h under 600～700 ℃ of conditions, carbon-drop rate is 75～80%.
3) ore grinding: the high-calcium type bone coal after decarburization roasting is milled to the 60～70wt% that accounts for that particle diameter is less than 0.074mm.
4) classification: the high-calcium type bone coal with hydrocyclone after to ore grinding carries out classification, obtains particle diameter and is greater than the coarse fraction product of 0.020mm and the fine fraction product that particle diameter is less than 0.020mm, and the fine fraction product that particle diameter is less than 0.020mm is final concentrate.
5) calcium is roughly selected with calcium and is scanned: the coarse fraction product that particle diameter is greater than to 0.020mm adopts flotation cell to carry out calcium and roughly selects, and the mine tailing after calcium is roughly selected adopts flotation grain to carry out calcium again and scans; The fatty acid collecting agent consumption that calcium is roughly selected middle employing is 500～750g/t, and the fatty acid collecting agent consumption that calcium is scanned middle employing is 200～350g/t; Calcium adds waterglass as inhibitor in roughly selecting, and waterglass consumption is 100～150g/t.
6) vanadium is roughly selected with vanadium and is scanned: the mine tailing after calcium is scanned adopts flotation cell to carry out vanadium and roughly selects, and the mine tailing after vanadium is roughly selected adopts flotation cell to carry out vanadium again and scans; The amine collector consumption that vanadium is roughly selected middle employing is 50～120g/t, and the amine collector consumption that vanadium is scanned middle employing is 30～70g/t; It is 2～2.5 that vanadium roughly selects that the pH value of scanning middle ore pulp with vanadium all controls; Vanadium adds prodan as inhibitor in roughly selecting, and prodan consumption is 50～100g/t.
Together with mine tailing that the concentrate that the concentrate that calcium is roughly selected, calcium are scanned is scanned with vanadium merges as true tailings; Together with concentrate that the concentrate that vanadium is roughly selected is scanned with vanadium merges as final concentrate; Vanadium is roughly selected with vanadium and is scanned and in process, all adopt amine collector.The index of concrete flotation preenrichment vanadium is in Table 1.
Somewhere, table 1 Hubei high-calcium type bone coal flotation preenrichment vanadium index
Embodiment 2
A kind of from high-calcium type bone coal the method for flotation preenrichment vanadium.By the method, process the high-calcium type bone coal vanadium of Certain District, Hunan, described high-calcium type bone coal V
2o
5grade is that 0.75～1.0%, CaO content is 4～7wt%.
The concrete steps of the present embodiment are as shown in Figure 1:
1) fragmentation: high-calcium type bone coal crushing raw ore to particle diameter is less than to 25mm;
2) decarburization roasting: the high-calcium type bone coal after fragmentation is placed in to roaster, decarburization roasting 1.5～2h under 700～750 ℃ of conditions, carbon-drop rate is 80～95%.
3) ore grinding: the high-calcium type bone coal after decarburization roasting is milled to the 70～80wt% that accounts for that particle diameter is less than 0.074mm.
4) classification: the high-calcium type bone coal with hydrocyclone after to ore grinding carries out classification, obtains particle diameter and is greater than the coarse fraction product of 0.020mm and the fine fraction product that particle diameter is less than 0.020mm, and the fine fraction product that particle diameter is less than 0.020mm is final concentrate.
5) calcium is roughly selected with calcium and is scanned: the coarse fraction product that particle diameter is greater than to 0.020mm adopts flotation cell to carry out calcium and roughly selects, and the mine tailing after calcium is roughly selected adopts flotation grain to carry out calcium again and scans; The fatty acid collecting agent consumption that calcium is roughly selected middle employing is 750～1000g/t, and the fatty acid collecting agent consumption that calcium is scanned middle employing is 350～500g/t; Calcium adds waterglass as inhibitor in roughly selecting, and waterglass consumption is 150～200g/t.
6) vanadium is roughly selected with vanadium and is scanned: the mine tailing after calcium is scanned adopts flotation cell to carry out vanadium and roughly selects, and the mine tailing after vanadium is roughly selected adopts flotation cell to carry out vanadium again and scans; The amine collector consumption that vanadium is roughly selected middle employing is 120～200g/t, and the amine collector consumption that vanadium is scanned middle employing is 70～100g/t; It is 2.5～3 that vanadium roughly selects that the pH value of scanning middle ore pulp with vanadium all controls; Vanadium adds prodan as inhibitor in roughly selecting, and prodan consumption is 100～150g/t.
Together with mine tailing that the concentrate that the concentrate that calcium is roughly selected, calcium are scanned is scanned with vanadium merges as true tailings; Together with concentrate that the concentrate that vanadium is roughly selected is scanned with vanadium merges as final concentrate; Vanadium is roughly selected with vanadium and is scanned and in process, all adopt amine collector.The index of concrete flotation preenrichment vanadium is in Table 2.
Table 2 Certain District, Hunan high-calcium type bone coal flotation preenrichment vanadium index
This specific embodiment describes technical scheme of the present invention and essential implementation in detail; not that protection scope of the present invention is limited; all any simple modification that Spirit Essence is done according to the present invention and equivalent structure transformation or modification, within all should being encompassed in protection scope of the present invention.
This specific embodiment arranged the benefit that decarburization calcining process has following several respects before ore grinding:
1) by decarburization roasting, can significantly reduce the preferential absorption of carbonaceous to flotation collector, reduce collector dosage.
2) solve carbonaceous cover cap in the problem of each mineral surfaces, collecting agent can be shown due selective to different minerals, separating effect is enhanced.
3) decarburization roasting process can be realized the oxidation of vanadium in bone coal and turn valency, and the concentrate after preenrichment can directly leach, and process structure is reasonable; In addition, the heat that in decarburization roasting process, carbon burning produces can be used for the leaching operation of chemical vanadium extraction, simultaneously also Vanadium Concentrationin to a certain extent of the scaling loss of carbon.
4) classification operation can, by partly separating containing the high fine fraction of vanadium, also play the effect of desliming on the one hand on the other hand to follow-up flotation operation; Calcium roughly selects that scan with calcium can be by the calcic calcite jettisoning in high-calcium type bone coal, the grade of not only can vanadium roughly selecting vanadium in pan feeding, and can avoid vanadium to roughly select reacting of acid pH adjusting agent and calcite, can greatly reduce the consumption of acid pH adjusting agent; Because the zero point of muscovite is less than the zero point of quartzy and feldspar, under the acid condition that is 2～3 in pH value, muscovite particle surface bear point, quartz and feldspar particle surface lotus are on schedule, adopt amine cation-collecting agent under this condition, to contain vanadium muscovite good with separation selectivity quartzy, feldspar, using prodan as the inhibitor of quartzy and feldspar simultaneously, can further strengthen separating effect.
5) concentrate obtaining by flotation preenrichment, as the pan feeding of chemical vanadium extraction, can greatly reduce the treating capacity of chemical vanadium extraction, and reduces the content of the sour mineral of consumption such as calcite in pan feeding, reduces the acid consumption leaching, and can significantly reduce subsequent chemistry vanadium extraction cost.
Therefore this specific embodiment compared with the prior art, have technique rationally, good separation effect, collector dosage is few, concentrate grade is high, acid pH adjusting agent consumption is little and can significantly reduce the feature of subsequent chemistry vanadium extraction cost.
Claims (5)
1. a method for flotation preenrichment vanadium from high-calcium type bone coal, is characterized in that the concrete steps of the method are:
1) fragmentation: high-calcium type bone coal crushing raw ore to particle diameter is less than to 25mm;
2) decarburization roasting: the high-calcium type bone coal after fragmentation is placed in to roaster, decarburization roasting 1～2h under 600～750 ℃ of conditions;
3) ore grinding: the high-calcium type bone coal after decarburization roasting is milled to the 60～80wt% that accounts for that particle diameter is less than 0.074mm;
4) classification: the high-calcium type bone coal with hydrocyclone after to ore grinding carries out classification, obtains particle diameter and is greater than the coarse fraction product of 0.020mm and the fine fraction product that particle diameter is less than 0.020mm, and the fine fraction product that particle diameter is less than 0.020mm is final concentrate;
5) calcium is roughly selected with calcium and is scanned: the coarse fraction product that particle diameter is greater than to 0.020mm adopts flotation cell to carry out calcium and roughly selects, and the mine tailing after calcium is roughly selected adopts flotation grain to carry out calcium again and scans; The fatty acid collecting agent consumption that calcium is roughly selected middle employing is 500～1000g/t, and the fatty acid collecting agent consumption that calcium is scanned middle employing is 200～500g/t; Calcium adds waterglass as inhibitor in roughly selecting, and waterglass consumption is 100～200g/t;
6) vanadium is roughly selected with vanadium and is scanned: the mine tailing after calcium is scanned adopts flotation cell to carry out vanadium and roughly selects, and the mine tailing after vanadium is roughly selected adopts flotation cell to carry out vanadium again and scans; The amine collector consumption that vanadium is roughly selected middle employing is 50～200g/t, and the amine collector consumption that vanadium is scanned middle employing is 30～100g/t; It is 2～3 that vanadium roughly selects that the pH value of scanning middle ore pulp with vanadium all controls; Vanadium adds prodan as inhibitor in roughly selecting, and prodan consumption is 50～150g/t;
Together with mine tailing that the concentrate that the concentrate that calcium is roughly selected, calcium are scanned is scanned with vanadium merges as true tailings; Together with concentrate that the concentrate that vanadium is roughly selected is scanned with vanadium merges as final concentrate; Vanadium is roughly selected with vanadium and is scanned and in process, all adopt amine collector.
According to claim 1 from high-calcium type bone coal the method for flotation preenrichment vanadium, it is characterized in that V in described high-calcium type bone coal
2o
5grade is that 0.5～1.0%, CaO content is 4～15wt%.
According to claim 1 from high-calcium type bone coal the method for flotation preenrichment vanadium, it is characterized in that the carbon-drop rate of described decarburization roasting is 75～95%.
According to claim 1 from high-calcium type bone coal the method for flotation preenrichment vanadium, it is characterized in that described fatty acid collecting agent is a kind of in oleic acid, enuatrol, tall oil, oxidized paraffin wax soap.
According to claim 1 from high-calcium type bone coal the method for flotation preenrichment vanadium, it is characterized in that described amine collector is a kind of in lauryl amine, lauryl amine acetate, dodecylamine hydrochloride, ether amine.
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Cited By (7)
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| CN104060108A (en) * | 2014-06-10 | 2014-09-24 | 中南大学 | Method for extracting vanadium from high-calcium vanadium-containing siliceous shale |
| CN104437833A (en) * | 2014-11-07 | 2015-03-25 | 贵州省贵金属矿产资源综合利用工程技术研究中心有限公司 | Physical upgrading method for enrichment of carbonaceous shale type vanadium ore |
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| CN105032598A (en) * | 2015-05-29 | 2015-11-11 | 武汉理工大学 | Method for floatation of preconcentration vanadium from high-calcium mica type vanadium-bearing stone coal |
| CN106944243A (en) * | 2016-12-27 | 2017-07-14 | 核工业北京化工冶金研究院 | A kind of preprocess method of shale uranium ore |
| WO2021146797A1 (en) * | 2020-01-20 | 2021-07-29 | First Vanadium Corp. | Vanadium extraction from disparate shale ores |
| CN115178363A (en) * | 2022-07-08 | 2022-10-14 | 中南大学 | Preparation of ultra-pure quartz powder from argillaceous quartzite and comprehensive utilization process |
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| CN104437833A (en) * | 2014-11-07 | 2015-03-25 | 贵州省贵金属矿产资源综合利用工程技术研究中心有限公司 | Physical upgrading method for enrichment of carbonaceous shale type vanadium ore |
| CN104437833B (en) * | 2014-11-07 | 2017-11-24 | 贵州省贵金属矿产资源综合利用工程技术研究中心有限公司 | A kind of method of physical upgrading enrichment carbonaceous shale type navajoite |
| CN105032598A (en) * | 2015-05-29 | 2015-11-11 | 武汉理工大学 | Method for floatation of preconcentration vanadium from high-calcium mica type vanadium-bearing stone coal |
| CN104907163A (en) * | 2015-07-07 | 2015-09-16 | 湖南有色金属研究院 | Mineral separation method of finely disseminated vanadium contained carbonaceous shale |
| CN106944243A (en) * | 2016-12-27 | 2017-07-14 | 核工业北京化工冶金研究院 | A kind of preprocess method of shale uranium ore |
| CN106944243B (en) * | 2016-12-27 | 2020-02-18 | 核工业北京化工冶金研究院 | Pretreatment method of argillaceous uranium ore |
| WO2021146797A1 (en) * | 2020-01-20 | 2021-07-29 | First Vanadium Corp. | Vanadium extraction from disparate shale ores |
| US11697600B2 (en) | 2020-01-20 | 2023-07-11 | First Vanadium Corp. | Vanadium extraction from disparate shale ores |
| CN115178363A (en) * | 2022-07-08 | 2022-10-14 | 中南大学 | Preparation of ultra-pure quartz powder from argillaceous quartzite and comprehensive utilization process |
| CN115178363B (en) * | 2022-07-08 | 2024-03-01 | 中南大学 | Ultra-high purity quartz powder prepared from mudstone-containing quartz rock and comprehensive utilization process |
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