CN103555932A - Method for roasting molybdenum concentrate - Google Patents

Method for roasting molybdenum concentrate Download PDF

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Publication number
CN103555932A
CN103555932A CN201310576583.8A CN201310576583A CN103555932A CN 103555932 A CN103555932 A CN 103555932A CN 201310576583 A CN201310576583 A CN 201310576583A CN 103555932 A CN103555932 A CN 103555932A
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calcining
liquid
crystallization
molybdenum
sodium sulfate
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CN201310576583.8A
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CN103555932B (en
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蓝碧波
刘晓英
伍赠玲
衷水平
王春
刘涛
邹来昌
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Zijin Mining Group Co Ltd
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Zijin Mining Group Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract

The invention relates to a method for roasting a molybdenum concentrate. The method comprises the steps of mixing a certain amount of sodium sulfate into the molybdenum concentrate, then forming balls and roasting; performing alkaline leaching on calcine; performing ion exchange adsorption on molybdenum leachate, then performing liquid crystallization to obtain sodium sulfate, and returning the sodium sulfate to serve as a molybdenum concentrate roasting additive; performing molybdenum concentrate ball forming by using a liquid after crystallization. By adopting the method, the chemical dosage of molybdenum calcine alkaline leaching and the production cost can be greatly reduced; moreover, the sodium sulfate obtained through liquid crystallization after the ion exchange adsorption during a molybdenum extraction process flow and the liquid after crystallization can be fully used for performing molybdenum concentrate ball forming, and the wastewater treating amount can be reduced.

Description

A kind of method of calcining molybdenum ore concentrate
One. technical field
The present invention relates to metallurgy industry, relate to a kind of method of calcining molybdenum ore concentrate.
Two. background technology
Molybdenum is a kind of rare metal with multiple high-efficiency high-quality function, with the form of its pure metal, alloy and compound, is widely used in modern industry.The molybdenum major part of occurring in nature exists with moly-sulfide form.The core of concentrated molybdenum ore leach molybdenum process is the oxidation of moly-sulfide.The oxidizing process of moly-sulfide mainly contains oxidizing roasting, adds sodium carbonate roasting, acid hot-pressure oxidation, alkaline hot-pressure oxidation, chemical oxidation, electrooxidation etc.At present, the more technique of industrial application is oxidizing roasting technique.Molybdenum oxide calcining leaches the general techniques such as ammonia soaks, alkali soaks that adopt.Owing to having the advantages such as molybdenum leaching rate is high, adaptability to raw material is strong, the industrial application producer of molybdenum calcining alkali soaking technology is more and more.
Although it is high that molybdenum calcining alkali soaks the leaching yield of molybdenum, the part that also comes with some shortcomings is as large in dosings such as sodium hydroxide, sodium carbonate, calcining molybdenum content approximately 48%, and when alkali soaks, sodium hydroxide concentration reaches 50% of calcining weight.
Three. summary of the invention
The object of the invention is to overcome the deficiency of existing technique, a kind of method of calcining molybdenum ore concentrate is provided, adopt the method, can greatly reduce the dosing that molybdenum calcining alkali soaks, greatly reduce production costs.
The present invention adopts following technical scheme:
During calcining molybdenum ore concentrate, add a certain proportion of sodium sulfate, the sodium sulfate that the attached liquid crystallization of molybdenum leach liquor ion-exchange absorption obtains returns as calcining molybdenum ore concentrate additive, utilize crystallization after liquid carry out concentrated molybdenum ore ball processed.
Detailed process condition is as follows:
During calcining molybdenum ore concentrate, the addition of sodium sulfate is 5%～20% of concentrated molybdenum ore weight;
When calcining alkali soaks, sodium hydroxide concentration is 10%～40% of calcining weight;
When calcining alkali soaks, sodium carbonate add-on is 3%～10% of calcining weight;
When calcining alkali soaks, chlorine bleach liquor's add-on is 0.2～0.6m 3/ t calcining.
Per-cent in this specification sheets (%) all refers to mass percent.
A kind of step of method of calcining molybdenum ore concentrate and processing condition are as follows specifically:
1, ball processed: concentrated molybdenum ore is allocated the sodium sulfate that the attached liquid crystallization of ion-exchange absorption obtains into, and sodium sulfate addition is 5%～20% of concentrated molybdenum ore weight, mixes, then utilizes liquid ball processed after crystallization.
2, roasting: concentrated molybdenum ore pelletizing carries out roasting 570 ℃ of left and right, the about 2h of roasting time.
3, alkali soaks: after concentrated molybdenum ore calcining utilizes crystallization, liquid is sized mixing, add sodium hydroxide, sodium carbonate and chlorine bleach liquor, sodium hydroxide concentration is 10%～40% of calcining weight, and sodium carbonate add-on is 3%～10% of calcining weight, and chlorine bleach liquor's add-on is 0.2～0.6m 3/ t calcining.
4, ion-exchange: ion-exchange absorption is carried out in the immersion liquid of calcining alkali, obtains the molybdenum stripping liquid of high density after loaded resin desorb.
5, ammonia is heavy: molybdenum stripping liquid regulates after applicable pH value, the heavy ammonium molybdate that obtains of ammonia.
6, crystallization: the attached liquid of ion-exchange absorption carries out crystallization, obtains liquid after sodium sulfate and crystallization, and sodium sulfate returns as concentrated molybdenum ore additive, and after crystallization, liquid is used for when ball processed and calcining alkali soak sizing mixing.
The method has the following advantages:
1, can greatly reduce the dosing that molybdenum calcining alkali soaks, greatly reduce production costs;
2, can make full use of liquid crystallization obtains after leach molybdenum process flow process intermediate ion exchange adsorption sodium sulfate and crystallization after liquid carry out concentrated molybdenum ore ball processed, can reduce wastewater treatment capacity, reduce production costs.
Four. accompanying drawing explanation
Fig. 1 is the schema of the method for a kind of calcining molybdenum ore concentrate of the present invention.
Five. embodiment
Below in conjunction with accompanying drawing 1 and embodiment, the present invention is described in further detail, not as limiting the scope of the present invention.
Embodiment 1:
Certain concentrated molybdenum ore is containing molybdenum 45%, allocates 5% sodium sulfate of concentrated molybdenum ore weight into, mixes, and utilizes liquid ball processed after absorption; Concentrated molybdenum ore pelletizing is at 570 ℃ of roasting 2h; Calcining carries out alkali and soaks, and sodium hydroxide concentration is 30% of calcining weight, and sodium carbonate add-on is 5% of calcining weight, and chlorine bleach liquor's add-on is 0.2m 3/ t calcining, molybdenum leaching rate is 92%.
Embodiment 2:
Certain concentrated molybdenum ore is containing molybdenum 45%, allocates 10% sodium sulfate of concentrated molybdenum ore weight into, mixes, and utilizes liquid ball processed after absorption; Concentrated molybdenum ore pelletizing is at 570 ℃ of roasting 2h; Calcining carries out alkali and soaks, and sodium hydroxide concentration is 35% of calcining weight, and sodium carbonate add-on is 7% of calcining weight, and chlorine bleach liquor's add-on is 0.3m 3/ t calcining, molybdenum leaching rate is 95%.
Embodiment 3:
Certain concentrated molybdenum ore is containing molybdenum 45%, allocates 15% sodium sulfate of concentrated molybdenum ore weight into, mixes, and utilizes liquid ball processed after absorption; Concentrated molybdenum ore pelletizing is at 570 ℃ of roasting 2h; Calcining carries out alkali and soaks, and sodium hydroxide concentration is 40% of calcining weight, and sodium carbonate add-on is 8% of calcining weight, and chlorine bleach liquor's add-on is 0.6m 3/ t calcining, molybdenum leaching rate is 96%.
Embodiment 4:
Certain concentrated molybdenum ore is containing molybdenum 45%, allocates 20% sodium sulfate of concentrated molybdenum ore weight into, mixes, and utilizes liquid ball processed after absorption; Concentrated molybdenum ore pelletizing is at 570 ℃ of roasting 2h; Calcining carries out alkali and soaks, and sodium hydroxide concentration is 25% of calcining weight, and sodium carbonate add-on is 4% of calcining weight, and chlorine bleach liquor's add-on is 0.2m 3/ t calcining, molybdenum leaching rate is 94%.
Comparative example 1:
Certain concentrated molybdenum ore is containing molybdenum 45%, and at 570 ℃ of roasting 2h, calcining carries out alkali and soaks, and sodium hydroxide concentration is 50% of calcining weight, and sodium carbonate add-on is 10% of calcining weight, and chlorine bleach liquor's add-on is 0.7m 3/ t calcining, molybdenum leaching rate is 95%.
Comparative example 2:
Certain concentrated molybdenum ore is containing molybdenum 45%, and at 570 ℃ of roasting 2h, calcining carries out alkali and soaks, and sodium hydroxide concentration is 35% of calcining weight, and sodium carbonate add-on is 7% of calcining weight, and chlorine bleach liquor's add-on is 0.3m 3/ t calcining, molybdenum leaching rate is 82%.

Claims (1)

1. the method for a calcining molybdenum ore concentrate, it is characterized in that: step and processing condition are as follows: a, ball processed: concentrated molybdenum ore is allocated the sodium sulfate that the attached liquid crystallization of ion-exchange absorption obtains into, sodium sulfate addition is 5%～20% of concentrated molybdenum ore weight, mixes, and then utilizes liquid ball processed after crystallization.
B, roasting: concentrated molybdenum ore pelletizing carries out roasting 570 ℃ of left and right, the about 2h of roasting time.
C, alkali soak: after concentrated molybdenum ore calcining utilizes crystallization, liquid is sized mixing, add sodium hydroxide, sodium carbonate and chlorine bleach liquor, sodium hydroxide concentration is 10%～40% of calcining weight, and sodium carbonate add-on is 3%～10% of calcining weight, and chlorine bleach liquor's add-on is 0.2～0.6m 3/ t calcining.
D, ion-exchange: ion-exchange absorption is carried out in the immersion liquid of calcining alkali, obtain the molybdenum stripping liquid of high density after loaded resin desorb.
E, ammonia sink: molybdenum stripping liquid regulates after applicable pH value, the heavy ammonium molybdate that obtains of ammonia.
F, crystallization: the attached liquid of ion-exchange absorption carries out crystallization, obtain liquid after sodium sulfate and crystallization, and sodium sulfate returns as concentrated molybdenum ore additive, and after crystallization, liquid is used for when ball processed and calcining alkali soak sizing mixing.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106756122A (en) * 2016-11-25 2017-05-31 桂林理工大学 A kind of method that caustic fusion decomposes molybdenite
CN108085487A (en) * 2017-12-27 2018-05-29 燕山大学 The method of molybdenum is leached in a kind of molybdenum concntrate from low-temperature bake
CN108715944A (en) * 2018-05-03 2018-10-30 中南大学 A kind of one step alkali leaching method of molybdenum calcining

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US4444733A (en) * 1983-02-28 1984-04-24 Amax Inc. Process for recovering molybdenum and copper from sulfide concentrates
EP0555128A1 (en) * 1992-02-07 1993-08-11 Eurecat Europeenne De Retraitement De Catalyseurs Recovery of molybdenum and vanadium from used catalysts
CN1386870A (en) * 2002-04-30 2002-12-25 云南省冶金研究设计院 Process for recovering Mo from low-grade molybdenite by dump leaching
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CN101792851A (en) * 2009-11-17 2010-08-04 灵宝市金源矿业有限责任公司 Recovery process of low-grade oxidizing molybdenum ore
CN101876004A (en) * 2010-08-03 2010-11-03 北京科技大学 Method for recycling rare metal molybdenum from mineral dressing tailings of molybdenum
CN101956070A (en) * 2010-07-07 2011-01-26 紫金矿业集团股份有限公司 Recovery method of molybdenum concentrates
CN102199704A (en) * 2011-05-17 2011-09-28 葫芦岛辉宏有色金属有限公司 Recycling use method of sodium chloride or sodium sulfate in hydrometallurgy

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EP0555128A1 (en) * 1992-02-07 1993-08-11 Eurecat Europeenne De Retraitement De Catalyseurs Recovery of molybdenum and vanadium from used catalysts
CN1386870A (en) * 2002-04-30 2002-12-25 云南省冶金研究设计院 Process for recovering Mo from low-grade molybdenite by dump leaching
CN101660045A (en) * 2009-09-29 2010-03-03 金堆城钼业股份有限公司 Method for leaching and recovering molybdenum from ammonia leaching residue
CN101792851A (en) * 2009-11-17 2010-08-04 灵宝市金源矿业有限责任公司 Recovery process of low-grade oxidizing molybdenum ore
CN101956070A (en) * 2010-07-07 2011-01-26 紫金矿业集团股份有限公司 Recovery method of molybdenum concentrates
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106756122A (en) * 2016-11-25 2017-05-31 桂林理工大学 A kind of method that caustic fusion decomposes molybdenite
CN108085487A (en) * 2017-12-27 2018-05-29 燕山大学 The method of molybdenum is leached in a kind of molybdenum concntrate from low-temperature bake
CN108715944A (en) * 2018-05-03 2018-10-30 中南大学 A kind of one step alkali leaching method of molybdenum calcining
CN108715944B (en) * 2018-05-03 2020-02-18 中南大学 One-step alkali leaching method for molybdenum calcine

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