CN110184457B - Molybdenum concentrate decarbonizer and process for reducing carbon content of molybdenum concentrate - Google Patents

Molybdenum concentrate decarbonizer and process for reducing carbon content of molybdenum concentrate Download PDF

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CN110184457B
CN110184457B CN201910472922.5A CN201910472922A CN110184457B CN 110184457 B CN110184457 B CN 110184457B CN 201910472922 A CN201910472922 A CN 201910472922A CN 110184457 B CN110184457 B CN 110184457B
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molybdenum concentrate
carbon content
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CN110184457A (en
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黄万抚
胡运祯
李新冬
曾祥荣
张天锡
黄李金鸿
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China Molybdenum Co Ltd
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Jiangxi University of Science and Technology
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    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
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    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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    • C22B34/30—Obtaining chromium, molybdenum or tungsten
    • C22B34/34—Obtaining molybdenum
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Abstract

The application provides a molybdenum concentrate decarbonizer and a process for reducing the carbon content of molybdenum concentrate. The invention provides a molybdenum concentrate decarbonizer and a molybdenum concentrate decarbonizer, which comprise the following components in parts by weight: 20-25 parts of sodium dodecyl benzene sulfonate; 2-5 parts of phosphate; 1-2 parts of diethanolamine; 1-2 parts of a dispersing agent. The molybdenum concentrate decarbonizer can be used for reducing the carbon content of molybdenum concentrate, feed liquid prepared by the molybdenum concentrate decarbonizer is used in the process for reducing the carbon content of the molybdenum concentrate, the decarbonization rate of the molybdenum concentrate is enabled to reach over 75% by adopting a method of ultrasonic treatment, concentration and filter pressing, and the molybdenum concentrate with the carbon content lower than 0.7% can be continuously and stably produced; the problems of dust emission and environmental pollution are avoided, and environmental protection is facilitated; low production energy consumption and resource saving.

Description

Molybdenum concentrate decarbonizer and process for reducing carbon content of molybdenum concentrate
Technical Field
The invention relates to the field of mineral separation, and particularly relates to a molybdenum concentrate decarbonizer and a process for reducing the carbon content of molybdenum concentrate.
Background
Molybdenum concentrate MoS2The lead gray is similar to graphite, has metallic luster, belongs to a hexagonal crystal system, and has hexagonal flaky crystals, patterns on the bottom surface, soft texture, smooth feeling, thin and flexible sheets. The molybdenum concentrate can be used for producing ferro-molybdenum alloy, metal molybdenum, calcium molybdate, ammonium molybdate, lubricant and the like. The flotation method is a main method for selecting molybdenum concentrate, the flotation process of the molybdenum concentrate usually adopts a flow of rough grinding and rough selection, regrinding of rough concentrate and then selection, and the grinding medium has an important influence on the carbon content of the flotation molybdenum concentrate in the grinding step, so that the carbon content of the molybdenum concentrate is often larger than 1.19%, and the molybdenum concentrate cannot reach the qualified standard. Therefore, it is of great significance to reduce the carbon content during the production of molybdenum concentrate.
Carbon phase analysis in the molybdenum concentrate shows that carbon in the molybdenum concentrate is organic carbon, inorganic carbon, graphite carbon and the like, and the organic carbon accounts for about 24 percent. Currently, the molybdenum concentrate decarburization process runs through the whole flotation and preparation process of the molybdenum concentrate, for example, chinese patent CN106238214A discloses a molybdenum concentrate decarburization process, which includes replacing flotation reagents, concentrating and pressure filtering, and drying, wherein the drying process specifically comprises the following steps: feeding the molybdenum concentrate coarse ore into an electromagnetic spiral drying machine, drying at the temperature of 350-400 ℃ for 15-25min, and performing drying treatment at high temperature to decompose organic carbon. Although the above method can reduce the carbon content of the molybdenum concentrate to some extent, it still has the following disadvantages: the molybdenum concentrate has fine particles (more than 60 percent of a 400-mesh sieve), and the dust is serious, the production environment is poor, the pollution is serious and the emission cannot be realized in the drying treatment process; secondly, sulfur dioxide gas is produced through high-temperature drying treatment, so that the environment is polluted; thirdly, the processing energy consumption is high, the power of the dryer reaches 400KW, one ton of molybdenum concentrate is dried per hour, and the cost reaches 205 yuan; fourthly, the temperature of a hearth exceeds 400 ℃ in the drying process, the temperature of the surface of the furnace wall is higher, and part of molybdenum concentrate is oxidized to influence the quality of molybdenum disulfide. In addition, no report is found at present for the further decarburization process of the molybdenum concentrate obtained by flotation and a decarburization agent special for reducing the carbon content in the molybdenum concentrate obtained by flotation.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to provide a decarbonizer for molybdenum concentrate and a process for reducing the carbon content of molybdenum concentrate, which overcome the defects that the decarbonizer and the decarbonization process are not specially used for reducing the carbon content of the molybdenum concentrate obtained by flotation in the prior art, and the drying step causes environmental pollution and resource waste in the prior decarbonization process.
A molybdenum concentrate decarbonizer comprises the following components in parts by weight: 20-25 parts of sodium dodecyl benzene sulfonate; 2-5 parts of phosphate; 1-2 parts of diethanolamine; 1-2 parts of a dispersing agent.
Further, the molybdenum concentrate decarbonizer also comprises 50-63 parts of water.
A process for reducing the carbon content of molybdenum concentrate comprising: preparing molybdenum concentrate into molybdenum concentrate pulp; adding a decarbonization liquid medicine into the molybdenum concentrate pulp, and carrying out ultrasonic treatment, wherein the decarbonization liquid medicine is a liquid medicine prepared by the molybdenum concentrate decarbonizer; concentrating the molybdenum concentrate pulp subjected to ultrasonic treatment; and carrying out filter pressing on the concentrated molybdenum concentrate pulp to obtain a molybdenum concentrate filter cake.
Further, the amount of the decarbonization liquid medicine is 0.1-2% of the molybdenum concentrate pulp by weight.
Further, the preparation method of the decarbonization liquid medicine comprises the following steps: dissolving sodium dodecyl benzene sulfonate, phosphate, diethanolamine and dispersant in water, and stirring.
Further, the frequency of the ultrasonic treatment is 20 to 70 kHz.
Further, the time of ultrasonic treatment is 1-60 min.
Further, in the step of ultrasonic treatment, stirring was performed at a rotation speed of 100-.
Further, the temperature of the ultrasonic treatment is 25 to 100 ℃.
Further, the concentration of the molybdenum concentrate in the molybdenum concentrate pulp is 5% -25%.
The technical scheme of the invention has the following advantages:
1. the decarbonization liquid prepared by taking sodium dodecyl benzene sulfonate, phosphate and diethanolamine as raw materials has good decarbonization effect on the molybdenum concentrate, and can effectively reduce the carbon content of the molybdenum concentrate.
2. According to the process for reducing the carbon content of the molybdenum concentrate, provided by the invention, the decarbonization liquid prepared by the molybdenum concentrate decarbonizer provided by the invention is added in the ultrasonic treatment step by adopting the methods of ultrasonic treatment, concentration and filter pressing, so that the decarbonization rate of the molybdenum concentrate reaches over 75%, and the molybdenum concentrate with the carbon content lower than 0.7% can be continuously and stably produced; the problems of dust emission and environmental pollution are avoided, and environmental protection is facilitated; the method provided by the invention is particularly suitable for decarburization treatment of high-grade molybdenum concentrate containing more than or equal to 55% of Mo and with the fineness of-37 mu m accounting for more than 60%, thereby providing the high-quality molybdenum concentrate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic flow diagram of a process for reducing the carbon content of a molybdenum concentrate in an embodiment of the present invention;
figure 2 is a process flow diagram for reducing the carbon content of a molybdenum concentrate in an embodiment of the present invention.
Detailed Description
The following examples are provided to further understand the present invention, not to limit the scope of the present invention, but to provide the best mode, not to limit the content and the protection scope of the present invention, and any product similar or similar to the present invention, which is obtained by combining the present invention with other prior art features, falls within the protection scope of the present invention.
The examples do not show the specific experimental steps or conditions, and can be performed according to the conventional experimental steps described in the literature in the field. The reagents or instruments used are not indicated by manufacturers, and are all conventional reagent products which can be obtained commercially.
The present application will be further described with reference to the accompanying drawings.
As shown in figure 1, the process flow for reducing the carbon content of the molybdenum concentrate sequentially comprises molybdenum concentrate, size mixing, ultrasonic treatment, concentration, filter pressing and low-carbon molybdenum concentrate.
As shown in fig. 2, the process flow for reducing the carbon content of the molybdenum concentrate provided by the present application specifically comprises: adding water into the molybdenum concentrate for size mixing, adding decarbonization liquid prepared by a molybdenum concentrate decarbonizing agent, sending the mixture into an ultrasonic processor for ultrasonic treatment, returning overflow to the flotation stage of the molybdenum concentrate for recycling, sending underflow into a thickener for concentration, sending the underflow of the thickener into a filter press for filter pressing, obtaining a molybdenum concentrate filter cake which is low-carbon molybdenum concentrate, and returning filtrate obtained by filter pressing to the flotation stage of the molybdenum concentrate for recycling.
The decarbonizer for molybdenum concentrate and the above process will be specifically described with reference to specific examples.
Example 1
A decarbonizer for molybdenum concentrate comprises the following raw materials: 20kg of sodium dodecyl benzene sulfonate, 5kg of sodium hexametaphosphate, 1kg of diethanolamine and 2kg of propylene glycol block polyether.
Example 2
A decarbonizer for molybdenum concentrate comprises the following raw materials: 22kg of sodium dodecyl benzene sulfonate, 3kg of sodium tripolyphosphate, 1kg of diethanolamine and 2kg of propylene glycol block polyether.
Example 3
A decarbonizer for molybdenum concentrate comprises the following raw materials: 25kg of sodium dodecyl benzene sulfonate, 2kg of trisodium phosphate, 2kg of diethanolamine and 1kg of dopamine.
Example 4
A decarbonizer for molybdenum concentrate comprises the following raw materials: 24kg of sodium dodecyl benzene sulfonate, 4kg of sodium pyrophosphate, 2kg of diethanolamine, 1kg of propylene glycol block polyether and 1kg of dopamine.
Example 5
Preparing a decarburization liquid medicine:
the raw material components in the molybdenum concentrate decarbonizer in example 1 are dissolved in 50kg of water and stirred uniformly for later use.
A process for reducing the carbon content of molybdenum concentrate is used for treating molybdenum concentrate containing Mo 55%, and comprises the following steps:
size mixing: adding 700kg of water into 100kg of molybdenum concentrate, and performing size mixing to ensure that the concentration of the molybdenum concentrate pulp is 12.5 percent to obtain the molybdenum concentrate pulp;
ultrasonic treatment: feeding the molybdenum concentrate pulp into an ultrasonic processor, adding 0.8kg of decarbonization liquid medicine prepared by the method, uniformly stirring, and carrying out ultrasonic treatment under the conditions of: stirring at 25 deg.C with ultrasonic current of 30A and ultrasonic frequency of 68kHz at 500r/min, and ultrasonic processing for 25 min;
concentration: feeding the molybdenum concentrate pulp subjected to ultrasonic treatment into a thickener for concentration, wherein the concentration of underflow is 30%, and overflow returns to the flotation step of molybdenum concentrate for recycling;
and (3) filter pressing: and performing filter pressing on the concentrated bottom flow to obtain a molybdenum concentrate filter cake with the water content of 10%, and returning the filtrate to the flotation step of the molybdenum concentrate for recycling.
Example 6
Preparing a decarburization liquid medicine:
the raw material components in the molybdenum concentrate decarbonizer in the example 2 are dissolved in 60kg of water and are uniformly stirred for standby.
A process for reducing the carbon content of molybdenum concentrate is used for treating molybdenum concentrate containing Mo 55%, and comprises the following steps:
size mixing: adding 900kg of water into 100kg of molybdenum concentrate, and mixing the molybdenum concentrate pulp to make the concentration of the molybdenum concentrate pulp be 10% to obtain molybdenum concentrate pulp;
ultrasonic treatment: sending the molybdenum concentrate pulp into an ultrasonic processor, adding 1.5kg of decarbonization liquid medicine prepared by the method, uniformly stirring, and then carrying out ultrasonic processing under the conditions of: stirring at 25 deg.C with ultrasonic current of 30A and ultrasonic frequency of 68kHz at a rotation speed of 400r/min, and ultrasonic processing for 30 min;
concentration: feeding the molybdenum concentrate pulp subjected to ultrasonic treatment into a thickener for concentration, wherein the concentration of underflow is 40%, and overflow returns to the flotation step of molybdenum concentrate for recycling;
and (3) filter pressing: and performing filter pressing on the concentrated bottom flow to obtain a molybdenum concentrate filter cake with the water content of 15%, and returning the filtrate to the flotation step of the molybdenum concentrate for recycling.
Example 7
Preparing a decarburization liquid medicine:
the raw material components in the molybdenum concentrate decarbonizer in example 3 are dissolved in 63kg of water and stirred uniformly for later use.
A process for reducing the carbon content of molybdenum concentrate is used for treating molybdenum concentrate containing Mo 57%, and comprises the following steps:
size mixing: adding 1900kg of water into 100kg of molybdenum concentrate, and performing size mixing to ensure that the concentration of the molybdenum concentrate pulp is 5 percent to obtain the molybdenum concentrate pulp;
ultrasonic treatment: sending the molybdenum concentrate pulp into an ultrasonic processor, adding 2kg of decarbonization liquid medicine prepared by the method, uniformly stirring, and then carrying out ultrasonic treatment, wherein the conditions of the ultrasonic treatment are as follows: stirring at 50 deg.C with ultrasonic current of 30A and ultrasonic frequency of 20kHz at 100r/min, and ultrasonic processing for 1 min;
concentration: feeding the molybdenum concentrate pulp subjected to ultrasonic treatment into a thickener for concentration, wherein the concentration of underflow is 35%, and overflow returns to the flotation step of molybdenum concentrate for recycling;
and (3) filter pressing: and performing filter pressing on the concentrated bottom flow to obtain a molybdenum concentrate filter cake with the water content of 8%, and returning the filtrate to the flotation step of the molybdenum concentrate for recycling.
Example 8
Preparing a decarburization liquid medicine:
the raw material components in the molybdenum concentrate decarbonizer in example 4 are dissolved in 55kg of water and stirred uniformly for later use.
A process for reducing the carbon content of molybdenum concentrate is used for treating molybdenum concentrate containing Mo 57%, and comprises the following steps:
size mixing: adding 300kg of water into 100kg of molybdenum concentrate, and adjusting the slurry to ensure that the concentration of the molybdenum concentrate slurry is 25% to obtain the molybdenum concentrate slurry;
ultrasonic treatment: sending the molybdenum concentrate pulp into an ultrasonic processor, adding 8kg of decarbonization liquid medicine prepared by the method, uniformly stirring, and then carrying out ultrasonic treatment, wherein the conditions of the ultrasonic treatment are as follows: stirring at 100 deg.C with ultrasonic current of 30A and ultrasonic frequency of 70kHz at rotation speed of 800r/min, and ultrasonic processing for 60 min;
concentration: feeding the molybdenum concentrate pulp subjected to ultrasonic treatment into a thickener for concentration, wherein the concentration of underflow is 30%, and overflow returns to the flotation step of molybdenum concentrate for recycling;
and (3) filter pressing: and performing filter pressing on the concentrated bottom flow to obtain a molybdenum concentrate filter cake with the water content of 10%, and returning the filtrate to the flotation step of the molybdenum concentrate for recycling.
Comparative example
The process of comparative example was the same as example 1 except that the decarburization chemical was not added in the ultrasonic treatment step.
Examples of the experiments
Molybdenum concentrate samples were treated according to the process for reducing the carbon content of molybdenum concentrate in examples 5-8 and comparative examples, respectively, with 5 groups of treatment in parallel for each example/comparative example;
and (2) measuring the carbon content (carbon content before molybdenum concentrate treatment) of each group of molybdenum concentrate samples to be treated by adopting a Raman spectrum method and the carbon content (carbon content after molybdenum concentrate treatment) in the molybdenum concentrate filter cake obtained after the molybdenum concentrate samples are treated by adopting a corresponding process for reducing the carbon content of the molybdenum concentrate, and calculating the carbon removal rate, wherein the calculation formula of the carbon removal rate is as follows:
the decarbonization rate (%) (carbon content before molybdenum concentrate treatment-carbon content after molybdenum concentrate treatment)/carbon content before molybdenum concentrate treatment;
the test data obtained in 4 examples and comparative examples are expressed as "mean ± standard deviation";
the statistical results of the carbon contents and the carbon removal rates obtained in examples 5 to 8 and comparative example are shown in Table 1.
TABLE 1 carbon content and carbon removal rate of molybdenum concentrate filter cakes obtained in examples 5-8 and comparative examples
Group of Carbon content (%). before treatment Carbon content after treatment (%) Carbon removal Rate (%)
Comparative example 2.74 2.11±0.02 23.00±0.73
Example 5 2.74 0.62±0.03 77.37±1.09
Example 6 2.14 0.51±0.01 76.17±0.47
Example 7 2.14 0.52±0.01 75.70±0.47
Example 8 2.34 0.57±0.01 75.64±0.43
As can be seen from Table 1, the process for reducing the carbon content in the molybdenum concentrate provided by the invention can be used for decarbonizing the molybdenum concentrate, the carbon content in the molybdenum concentrate can be stably controlled to be below 0.7%, the decarbonization rate is as high as 75% or above, and the product quality of the molybdenum concentrate can be ensured. Compared with the comparative examples, in the examples 5 to 8, after the decarbonization liquid prepared by adding the molybdenum concentrate decarbonizer in the ultrasonic treatment process, the decarbonization rate is obviously improved, the carbon content in the molybdenum concentrate is reduced, and the purpose of reducing the carbon content in the molybdenum concentrate is realized. In addition, compared with the prior art, the process provided by the invention not only saves the drying and flue gas treatment operation, avoids the problems of dust raising, environmental pollution and the like of the prior art, but also reduces the energy consumption and saves resources (the prior intermediate frequency induction cooker,the energy consumption of electric dust collector and other equipment is about 800 KW.h per ton of mineral, while the energy consumption is about 200 KW.h per ton of mineral by adopting the process provided by the invention, if calculated according to annual treatment of 20000 tons of molybdenum concentrate, the electricity consumption is reduced by 1.2 multiplied by 10 every year7KW·h)。
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (10)

1. The decarbonizing agent for the molybdenum concentrate is characterized by comprising the following components in parts by weight:
20-25 parts of sodium dodecyl benzene sulfonate;
2-5 parts of phosphate;
1-2 parts of diethanolamine;
1-2 parts of a dispersant;
wherein the phosphate is sodium tripolyphosphate, sodium pyrophosphate or sodium hexametaphosphate;
the dispersing agent is dopamine or propylene glycol block polyether.
2. The molybdenum concentrate decarboniser of claim 1, further comprising 50-63 parts of water.
3. A process for reducing the carbon content of molybdenum concentrate comprising:
preparing molybdenum concentrate into molybdenum concentrate pulp;
adding a decarbonization liquid medicine into the molybdenum concentrate pulp for ultrasonic treatment, wherein the decarbonization liquid medicine is a liquid medicine prepared by the molybdenum concentrate decarbonizer according to claim 1 or 2;
concentrating the molybdenum concentrate pulp subjected to ultrasonic treatment;
and carrying out filter pressing on the concentrated molybdenum concentrate pulp to obtain a molybdenum concentrate filter cake.
4. The process for reducing the carbon content of molybdenum concentrate according to claim 3, wherein the amount of the decarbonization liquid is 0.1-2% by weight of the molybdenum concentrate pulp.
5. The process for reducing the carbon content of the molybdenum concentrate according to claim 3 or 4, wherein the preparation method of the decarburization liquid comprises the following steps: dissolving sodium dodecyl benzene sulfonate, phosphate, diethanolamine and dispersant in water, and stirring.
6. The process for reducing the carbon content of molybdenum concentrate according to claim 5, wherein the frequency of ultrasonic treatment is 20-70 kHz.
7. The process for reducing the carbon content of molybdenum concentrate according to claim 6, wherein the time of ultrasonic treatment is 1-60 min.
8. The process for reducing the carbon content of molybdenum concentrate as recited in claim 7, wherein the step of ultrasonic treatment comprises stirring at a speed of 100-.
9. The process for reducing the carbon content of molybdenum concentrate according to claim 8, wherein the temperature of the ultrasonic treatment is 25-100 ℃.
10. The process for reducing the carbon content of molybdenum concentrate according to claim 9, wherein the concentration of molybdenum concentrate in the molybdenum concentrate slurry is 5% to 25%.
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Citations (4)

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Publication number Priority date Publication date Assignee Title
CN101259450A (en) * 2008-03-12 2008-09-10 中南大学 High-efficiency ore sorting technique for nickel-molybdenum mineral
CN103817011A (en) * 2014-01-14 2014-05-28 纳雍县汇丰矿业有限公司 Carbon inhibitor and application thereof in molybdenum-nickel flotation from high-carbon molybdenum-nickel ores
CN106238214A (en) * 2016-08-10 2016-12-21 金堆城钼业股份有限公司 A kind of molybdenum concntrate decarbonization process
CN106540815A (en) * 2016-11-09 2017-03-29 长春黄金研究院 A kind of microfine zinc oxide ore beneficiation method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10055126C1 (en) * 2000-11-07 2002-05-23 Clariant Internat Ltd Muttenz Flotation reagent, used as collector in flotation of (complex) sulfide ore, especially copper ore, contains N,O-dialkyl thionocarbamate and 2-mercapto-benzothiazole compounds
AU2002366658B2 (en) * 2001-12-12 2006-08-10 Zoran Petkovic Selective flotation agent and flotation method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101259450A (en) * 2008-03-12 2008-09-10 中南大学 High-efficiency ore sorting technique for nickel-molybdenum mineral
CN103817011A (en) * 2014-01-14 2014-05-28 纳雍县汇丰矿业有限公司 Carbon inhibitor and application thereof in molybdenum-nickel flotation from high-carbon molybdenum-nickel ores
CN106238214A (en) * 2016-08-10 2016-12-21 金堆城钼业股份有限公司 A kind of molybdenum concntrate decarbonization process
CN106540815A (en) * 2016-11-09 2017-03-29 长春黄金研究院 A kind of microfine zinc oxide ore beneficiation method

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