CN101480631A - Mineral separation process of high-carbon molybdenum-nickel ore - Google Patents
Mineral separation process of high-carbon molybdenum-nickel ore Download PDFInfo
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- CN101480631A CN101480631A CNA2009100424934A CN200910042493A CN101480631A CN 101480631 A CN101480631 A CN 101480631A CN A2009100424934 A CNA2009100424934 A CN A2009100424934A CN 200910042493 A CN200910042493 A CN 200910042493A CN 101480631 A CN101480631 A CN 101480631A
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Abstract
The invention provides a beneficiation method for a high-carbon molybdenum nickel ore, which adopts floatation decarbonization so as to eliminate the influence of high-content carbon substances on subsequent nickel floatation. Furthermore, the beneficiation process adopts sieve classification with jigging and tail throwing so as to enhance the floatation and selected grade, then rough concentrates are selected again and treated by floatation after being ground, and the ore concentrates are selected again with tail throwing to enhance the floatation and selected grade without ore grinding. The invention can greatly reduce the floatation quantity, has good beneficiation index and provides a new way for developing a low-grade high-carbon molybdenum nickel ore.
Description
Technical field
The present invention relates to ore dressing field, be specifically related to a kind of beneficiation method of high-carbon molybdenum-nickel ore.
Background technology
Along with the develop rapidly of global economic integration, national economy grows with each passing day to the demand of non-ferrous metal.Molybdenum, nickel, vanadium also are important strategic resource and military project raw material as the means of production important in industrial production and the people's lives.Because it is modern metallurgical, electronics, space flight, industry such as chemistry is fast-developing, in the mankind's activity more and more widely with the nickel molybdenum and contain molybdenum nickel fuel cell, the whole world annual molybdenum nickel demand is about 180,000 tons, not only there is huge breach, and demand increases rapidly, the molybdenum international market price by before 2004 100000 yuan/ton rise to 600,000 yuan/ton, be stabilized in about 500,000 yuan/ton in 2007, the international market price of nickel also by before 2005 100000 yuan/ton rise to 300,000 yuan/ton, although China is molybdenum nickel production big country, but far can not satisfy the demand in market, also want a large amount of molybdenums of import every year, the nickel metal.According to last analysis, there is not marketing problem in the product of producing after this project implementation, and Yan Jiukaifa select smelting new technology, new technology has important dissemination to bargh of the same type simultaneously.
The high-carbon nickel-molybdenum ore is the stratiform nickel-molybdenum ore along the uniqueness of discovery black shale in the following Cambrian in the ancient basin, south, Chinese the Changjiang river in the sixties, is novel nickel-molybdenum ore kind.It is different from traditional nickel sulfide, sulfuration molybdenum ore.The main feature of high-carbon nickel-molybdenum ore is the carbon containing height, and the molybdenum ore owner will be adsorbed on the culm mineral with atomic state, exists with the aggregate form, has only a spot of molybdenum to exist with the molybdenite form, and most molybdenums exist with culm aggregate form; High-carbon nickel-molybdenum ore value of exploiting and utilizing height very contains rare precious metals such as association vanadium, phosphorus, copper, lead, zinc, uranium, platinum and palladium except containing the nickel molybdenum; Area, the western Hunan, Hunan high-carbon nickel-molybdenum ore is nickeliferous usually to be 0.1-1.5%, contain molybdenum 0.1-3%, reaches 6% individually, and nickel molybdenum content height has very high value of exploiting and utilizing.And high-carbon nickel-molybdenum ore reserves are very abundant, mainly are distributed in ground such as Hunan, Guizhou, Yunnan, and only grade nickel-molybdenum ore reserves in Hunan Province's high-carbon ground are at 10,000,000 tons.
High-carbon nickel molybdenum carbon containing height, ore character is very complicated, the ore dressing difficulty is very big, reclaim at present high-carbon nickel-molybdenum ore dressing and smelting process and be picking, roasting, alkali and soak and reclaim key and obtain ammonium molybdate, its PROCESS FOR TREATMENT cost height, the rate of recovery is low, technology simply can only reclaim and contain molybdenum and be higher than high-grade nickel-molybdenum ore more than 3%, the low ore grade nickel molybdenum ore is for containing molybdenum less than 1.5%, and traditional dressing and smelting process is handled loss of capital, can't reclaim.According to the high-carbon nickel molybdenum exploitation measuring and calculating of Zhangjiajie area: whenever adopt eight tons of nickel-molybdenum ores only less than one ton of nickel-molybdenum ore that contains molybdenum 3%, have eight tons mostly to be and to contain the low-grade nickel-molybdenum ore of molybdenum at 0.1-1.5%.Low-grade nickel-molybdenum ore ground mass originally is not recovered utilization and is dropped, and becomes the face of land one big pollution sources, takies a large amount of fields; As at Cili Dong Xi, the big level ground of Yongding District, ground such as mining area, the Tian Mu Shan Mountain all have this lean ore heap of few hundred thousand tonnes of to abandon, and nobody shows any interest in, and cause the huge waste of resource.Area, the western Hunan, Hunan high-carbon nickel-molybdenum ore often considers that from economic angle adopt rich ore and abandon lean ore, by inference, ten Duo Jia mines of legal right to mine have been obtained in the area, Zhangjiajie, abandon low-grade high-carbon nickel-molybdenum ore every year at least more than 100,000 tons at present.Present conventional dressing and smelting process falls behind, and the sulfur dioxide of roasting output causes great harm to environment, and the nickel molybdenum recovery is low, the production cost height, and many associated valuable metals are not all comprehensively reclaimed.
Collecting agent is the major terms of ore dressing field, and its effect is to change mineral surfaces, makes the mineral hydrophobicity, and the ore particle that swims is attached on the bubble, and this floating agent is collecting agent.The kind of collecting agent is a lot, can be divided into anionic, cationic, amphoteric and nonionic by its ionic nature; The collecting agent that can be divided into sulfide mineral collector, oxide ore collecting agent, nonpolar mineral collector and plated metal by its range of application.Collecting agent has physical absorption, chemisorbed and surface chemical reaction in the effect of mineral surfaces.The absorption of collecting agent and mineral floating behavior have substantial connection.In certain collecting agent concentration range, along with drug concentration improves, adsorbance increases, and flotation recovery rate significantly rises; Concentration reach mutually on duty after, the rate of recovery diminishes with the amplitude that concentration and adsorbance improve; During the collecting agent excessive concentration, adsorbance also can continue to increase, but flotation recovery rate no longer raises, even decline on the contrary.Therefore, in floatation process, to correctly grasp the consumption of collecting agent, to obtain optimum efficiency.
Summary of the invention
For overcoming the defective that exists in the above-mentioned technology, the invention provides the beneficiation method of the low-grade molybdenum nickel minerals of a kind of high-carbon, its technical scheme comprises the steps:
1) the nickel-molybdenum ore raw ore adopts reciprocating sieve to carry out classification through after the coarse crushing, and being classified into three grades is 3-8mm, 8-20mm, and 20-30mm, these three granularity ranks are carried out the jigging gravity treatment respectively;
2) concentrate of described three the granularity rank jigging gravity treatment gained of step 1) and chats merge with-3mm raw ore again, then through ore grinding, being milled to fineness is the 84.6%-200 order, carry out flotation again, flotation decarburization operation is carried out in described flotation earlier, obtain flotation carbon containing molybdenum concntrate and decarburization mine tailing, the decarburization mine tailing carries out the flotation molybdenum and roughly selects operation, and gained is roughly selected the molybdenum concntrate product that selected molybdenum concntrate that molybdenum concntrate obtains through the triple cleaning operation again and decarburization flotation carbon containing molybdenum concntrate merge to the end;
3) step 2) described flotation molybdenum is roughly selected mine tailing that operation obtains and is carried out flotation nickel and roughly select operation, and the nickel of gained is roughly selected concentrate and carried out the triple cleaning operation again, obtains the nickel ore concentrate product.
Na is adopted in the described flotation decarburization of above-mentioned steps (2) operation
2SiO
3Inhibitor, kerosene and 2 as gangue mineral
#Oil, enters flotation device and carries out the decarburization flotation after stirring as the collecting agent of carbonaceous thing, obtains the carbon containing molybdenum concntrate.
The described Na of step (2)
2SiO
3Consumption is 30 gram/tons-35 gram/tons, and the kerosene consumption is 400 gram/tons-430 gram/tons, 2
#The oil consumption is 100 gram/tons-110 gram/tons.
The described flotation nickel of above-mentioned steps (3) is roughly selected operation and is adopted butyl xanthate and 25
#Black powder is as collecting agent, CuSO
4As activator, Na
2S is for adjusting agent.
The described CuSO of step (3)
4Consumption be 390 gram/tons-425 gram/tons, Na
2The consumption of S is 260 gram/tons-285 gram/tons, and the consumption of butyl xanthate is 175 gram/tons-190 gram/tons, 25
#The consumption of black powder is 15 gram/tons-20 gram/tons.
The consumption of described medicament is meant the weight of the employed medicament of all ores that participation per ton sorts.
In the molybdenum floatation process, because a large amount of existence of carbonaceous thing have a strong impact on the flotation of purpose mineral, nickel molybdenum flotation effect is very poor.The present invention adopts the flotation decarburization, and the flotation to the nickel-molybdenum ore thing after the decarburization flotation is very useful, has got rid of the influence of carbon to follow-up nickel flotation, solves high-carbon to the serious technical barrier that disturbs of nickel molybdenum flotation.The activity of carbonaceous thing is very strong, and a large amount of beneficiation reagent of its absorption causes the nickel molybdenum to be difficult to flotation, and reagent consumption is big, and collector dosage increases by three times usually, and the rate of recovery is lower more than 20% than not decarburization.High-carbon nickel-molybdenum ore carbon containing is up to 40%, and the flotation decarburization is to adopt ore-dressing technique successfully to reclaim one of key technology of low-grade high-carbon nickel molybdenum.Therefore can reduce the dosing in the follow-up flotation flowsheet after the flotation decarburization to a great extent, thereby on the basis that reduces production costs, make the recovery maximization of purpose mineral.In conjunction with the gravity separation technology flow process of front, adopt the flotation decarburization more respectively the technological process of flotation molybdenum, nickel mineral can under the situation that head grade fluctuates within the specific limits, obtain stable sorting index.The nickel flotation adopts xanthate and black powder as collecting agent, carries out the flotation nickel mineral, obtains nickel ore concentrate.
Technical solution of the present invention adopts weight-floating process flow, can fall tail in advance under the condition that does not need ore grinding by gravity treatment, reduces beneficiation cost significantly, increases the ore dressing benefit, also can improve flotation effect simultaneously.The present invention selects weight-floating process flow for use, adopts sieve classification, and the classification jigging is lost tail, improves the selected grade of flotation, carries out the flotation of nickel-molybdenum ore thing then behind the gravity treatment rough concentrate ore grinding.Gravity treatment is lost tail and is improved the selected grade of flotation, reduces ore grinding amount and flotation amount significantly, has low cost, free of contamination characteristics.This technological process has mineral processing index stablizes, and adaptability is strong, higher concentration ratio, and lower characteristics such as beneficiation cost provide a new way for developing low-grade high-carbon nickel-molybdenum ore resource.
Adopting the classification jigging to roughly select the selected grade that improves flotation is an innovative point in the field of sorting of high-carbon nickel-molybdenum ore, utilize the big characteristics of re-selection process amount to come the mineral of a large amount of size fractionated and grade are handled, abandoning some of them does not have the impurity thing of recovery value, to obtain the flotation raw ore than high-grade.Can also reduce the treating capacity of flotation operation, reduce beneficiation cost.Gravity treatment is conventional ore-dressing technique, but does not adopt gravity separation technology to handle the report of high-carbon nickel-molybdenum ore at present both at home and abroad.
Beneficiation method of the present invention also has characteristics cheaply, can reduce the mineral of consumption acid consumption alkali such as silica, alundum (Al, calcium oxide, magnesia etc. significantly, these impurity are removed rate more than 70%, thereby can reduce metallurgical cost effectively, improve smelting recovery and product quality.Ore dressing obtains the nickel molybdenum concntrate and adopts the smelting recovery to obtain ammonium molybdate, vanadic anhydride and nickel matallurgical products.
Description of drawings
Fig. 1 is the beneficiation flowsheet key diagram of high-carbon molybdenum-nickel ore of the present invention;
Fig. 2 is the beneficiation method detail flowchart of high-carbon molybdenum-nickel ore of the present invention.
The specific embodiment
Embodiment
Nickel-molybdenum ore bulk raw ore is divided into 3-8mm through coarse crushing, 8-20mm, and three ranks of 20-30mm are carried out the jigging gravity treatment more respectively.Three grade classification jiggings the results are shown in Table 1.
The result (%) of table 1 classification jigging
Productive rate after the concentrate of jigging and chats merge is 45.91%, and the molybdenum grade is 0.28%, and the rate of recovery is 73.07%; The nickel grade is 0.23%, and the rate of recovery is 80.37%.The productive rate of jigging mine tailing is 54.09%, and the molybdenum grade is 0.095%, and the rate of recovery is 26.93%; The nickel grade is 0.065%, and the rate of recovery is 19.63%.
Gravity concentrate and chats and-the 3mm raw ore merges through the ball mill ore grinding, ore grinding to fineness is the 84.6%-200 order.High-carbon nickel-molybdenum ore carbon containing reaches 40%, carries out flotation decarburization operation.Na is adopted in flotation decarburization operation
2SiO
3Inhibitor, kerosene and 2 as gangue mineral
#Oil, enters flotation device and carries out the decarburization flotation after stirring as the collecting agent of carbonaceous thing, wherein, and Na
2SiO
3Consumption be 30.5 gram/tons, the kerosene consumption is 408.7 gram/tons, 2
#The oil consumption is 103.7 gram/tons.The decarburization operation obtains flotation carbon containing molybdenum concntrate and decarburization mine tailing, the decarburization mine tailing carries out the flotation molybdenum and roughly selects operation, the molybdenum rough concentrate of gained again through after the triple cleaning operation with the molybdenum ore thing of decarburization flotation and molybdenum concntrate product to the end, carbon-drop rate is 82%, i.e. decarburization mine tailing carbon containing 7.2%.
Molybdenum is roughly selected the mine tailing that obtains and is entered flotation nickel and roughly select operation, adopts butyl xanthate and 25
#Black powder is as collecting agent, with CuSO
4As activator, Na
2S is for adjusting agent, and SJQ is an inhibitor, carries out the flotation nickel mineral, and the consumption of butyl xanthate is 183 gram/tons, and 25
#The consumption of black powder is 183 gram/tons, CuSO
4Consumption be 407 gram/tons, Na
2The consumption of S is 275 gram/tons, and flotation nickel is roughly selected the concentrate that obtains after the operation and carried out triple cleaning and obtain final nickel ore concentrate product.
Flow process the results are shown in Table 2 as shown in Figure 2.The overall recovery 85.57% of molybdenum concntrate, nickel ore concentrate overall recovery 84.01%, nickel molybdenum bulk concentrate contain molybdenum 2.23%, nickeliferous 1.52%, and the concentration ratio of molybdenum is 2.54, and the concentration ratio of nickel is 2.52.
The ore dressing result (%) of table 2 high-carbon molybdenum-nickel ore
This beneficiation method can reduce the mineral of consumption acid consumption alkali such as silica, alundum (Al, calcium oxide, magnesia etc., and these impurity are removed rate more than 70%, and concentrate product and raw ore have been carried out the chemical examination of contrast multielement, and result of laboratory test sees Table 3, SiO
2Remove 74.32%, Al
2O
3Remove 71.58%, CaO removes 72.20%.Silica, alundum (Al, calcium oxide and the magnesia removal effect of consumption acid consumption alkali are better.
Table 3 product and raw ore multivariate analysis result (%)
Claims (5)
1, a kind of beneficiation method of high-carbon nickel-molybdenum ore is characterized in that, comprises the steps:
(1) the nickel-molybdenum ore raw ore adopts reciprocating sieve to carry out classification through after the coarse crushing, and being classified into three grades is 3-8mm, 8-20mm, and 20-30mm, these three granularity ranks are carried out the jigging gravity treatment respectively;
(2) concentrate of described three the granularity rank jigging gravity treatment gained of step (1) and chats merge with-3mm raw ore again, then through ore grinding, being milled to fineness is the 84.6%-200 order, carry out flotation again, flotation decarburization operation is carried out in described flotation earlier, obtain flotation carbon containing molybdenum concntrate and decarburization mine tailing, the decarburization mine tailing carries out the flotation molybdenum and roughly selects operation, obtain molybdenum and roughly select concentrate and molybdenum rougher tailings, molybdenum is roughly selected the molybdenum concntrate product that selected molybdenum concntrate that concentrate obtains through the triple cleaning operation again and decarburization flotation carbon containing molybdenum concntrate merge to the end;
(3) the described molybdenum rougher tailings of step (2) carries out flotation nickel and roughly selects operation, and the nickel of gained is roughly selected concentrate and carried out the triple cleaning operation again, obtains the nickel ore concentrate product.
2, method according to claim 1 is characterized in that, Na is adopted in the described flotation decarburization of step (2) operation
2SiO
3Inhibitor, kerosene and 2 as gangue mineral
#Oil, enters flotation device and carries out the decarburization flotation after stirring as the collecting agent of carbonaceous thing, obtains the carbon containing molybdenum concntrate.
3, method according to claim 2 is characterized in that, the described Na of step (2)
2SiO
3Consumption is 30 gram/tons-35 gram/tons, and the kerosene consumption is 400 gram/tons-430 gram/tons, 2
#The oil consumption is 100 gram/tons-110 gram/tons.
4, method according to claim 1 is characterized in that, the described flotation nickel of step (3) is roughly selected operation and adopted butyl xanthate and 25
#Black powder is as collecting agent, CuSO
4As activator, Na
2S is for adjusting agent.
5, method according to claim 4 is characterized in that, the described CuSO of step (3)
4Consumption be 390 gram/tons-425 gram/tons, Na
2The consumption of S is 260 gram/tons-285 gram/tons, and the consumption of butyl xanthate is 175 gram/tons-190 gram/tons, 25
#The consumption of black powder is 15 gram/tons-20 gram/tons.
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| CN115193573B (en) * | 2022-06-21 | 2024-08-30 | 广东省科学院资源利用与稀土开发研究所 | Ore dressing method for molybdenite rich in easy-floating gangue |
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Application publication date: 20090715 |