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A process for step-by-step production of high-grade molybdenum concentrate and ordinary molybdenum concentrate

A high-grade molybdenum concentrate technology, applied in the field of molybdenum concentrate production, can solve the problems of low recovery rate of molybdenum concentrate, long beneficiation process, high fine tail running, solve the problem of medium ore circulation and enhance the collection capacity , the effect of reducing the number of selections

Active Publication Date: 2019-05-07
JINDUICHENG MOLYBDENUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, point-like molybdenite is wrapped in gangue minerals and is not easy to dissociate, which makes the recovery of molybdenite more difficult, and the molybdenum grade of molybdenum concentrate gradually decreases.
[0003] At present, the focus of molybdenum ore production is on the production of high-grade molybdenum concentrates with a molybdenum grade of more than 57%. High-grade molybdenum concentrates can be improved by improving the beneficiation process, increasing the beneficiation times, or reducing the impurity metal content in molybdenum ores. In the production process, there are generally problems such as long beneficiation process, repeated circulation of medium ore and high tailing run, which not only increases the production cost, but also causes a large loss of molybdenum concentrate, and the recovery rate of molybdenum concentrate in the product is low.
The invention patent with the notification number CN103386375B discloses a method for screening molybdenum concentrates. The molybdenum ore with a molybdenum grade of 0.2% is sequentially crushed, ore-grinded, classified, flotation, beneficiated and dehydrated to obtain a molybdenum grade of 45%. Molybdenum concentrate with a recovery rate of 85%; but this method can only produce ordinary molybdenum concentrate, and cannot produce high-grade molybdenum concentrate with a molybdenum grade of 57% or more

Method used

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  • A process for step-by-step production of high-grade molybdenum concentrate and ordinary molybdenum concentrate
  • A process for step-by-step production of high-grade molybdenum concentrate and ordinary molybdenum concentrate

Examples

Experimental program
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Effect test

Embodiment 1

[0034] The technique of the present embodiment comprises the following steps:

[0035] Step 1, adding water to grind molybdenum raw ore with a molybdenum grade of 0.115% to obtain a molybdenum slurry with a mass concentration of 30%, wherein the grinding fineness of the molybdenum raw ore is -0.074mm, accounting for 50wt%;

[0036] Step 2: Add main collector No. 0 diesel oil, auxiliary collector butylammonium black medicine and foaming agent terpineol oil to the molybdenum slurry obtained in step 1, and roughen for 10 minutes to obtain molybdenum rough tailings and molybdenum grade of 5% Molybdenum crude concentrate, the addition of No. 0 diesel oil, butyl ammonium black drug and terpineol oil is calculated according to the quality of molybdenum raw ore: No. 0 diesel oil 110g / t, butyl ammonium black drug 7g / t, terpineol oil 70g / t; Then the molybdenum coarse concentrate is subjected to rapid flotation for 35s to obtain the rapid flotation molybdenum tailings and the rapid flot...

Embodiment 2

[0043] The technique of the present embodiment comprises the following steps:

[0044] Step 1, adding water to grind the molybdenum raw ore with a molybdenum grade of 0.102% to obtain a molybdenum slurry with a mass concentration of 33%, wherein the grinding fineness of the molybdenum raw ore is -0.074mm, accounting for 65% by weight;

[0045] Step 2: Add main collector No. 0 diesel oil, auxiliary collector butyl ammonium black medicine and foaming agent terpineol oil to the molybdenum slurry obtained in step 1, and roughen for 8 minutes to obtain molybdenum coarse tailings and molybdenum grade of 3% Molybdenum crude concentrate, the addition of No. 0 diesel oil, butyl ammonium black drug and terpineol oil is calculated according to the quality of molybdenum raw ore: No. 0 diesel oil 90g / t, butyl ammonium black drug 5g / t, terpineol oil 55g / t, and then the molybdenum coarse concentrate is subjected to rapid flotation for 30s to obtain the rapid flotation molybdenum tailings an...

Embodiment 3

[0052] The technique of the present embodiment comprises the following steps:

[0053] Step 1. Grinding molybdenum raw ore with a molybdenum grade of 0.080% with water to obtain a molybdenum slurry with a mass concentration of 35%, wherein the grinding fineness of the molybdenum raw ore is -0.074mm, accounting for 60wt%;

[0054] Step 2. Add main collector No. 0 diesel oil, auxiliary collector butylammonium black medicine and loose foaming agent alcohol oil to the molybdenum slurry obtained in step 1. Roughly select molybdenum crude tailings and molybdenum grade of 2% molybdenum crude concentrate, the addition of No. 0 diesel oil, butyl ammonium black drug and terpineol oil is calculated according to the quality of molybdenum raw ore: No. 0 diesel oil 70g / t, butyl ammonium black drug 2g / t, terpineol oil 40g / t, and then the molybdenum coarse concentrate is subjected to rapid flotation for 15s to obtain the rapid flotation molybdenum tailings and the rapid flotation molybdenum ...

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Abstract

The invention discloses a process for step-by-step production of high-grade molybdenum concentrates and ordinary molybdenum concentrates. The process comprises the following steps that 1, molybdenum crude ore is added with water and ground, and molybdenum ore pulp is obtained; 2, the molybdenum ore pulp is subjected to roughing, molybdenum rough concentrates and molybdenum rough tailings are obtained, the molybdenum rough concentrates or the molybdenum ore pulp is subjected to fast flotation, and fast flotation molybdenum rough concentrates and fast flotation molybdenum tailings are obtained; 3, the fast flotation molybdenum rough concentrates are subjected to two-stage regrinding and selection for five times, and the high-grade molybdenum concentrates where the grade of molybdenum is larger than 57% are obtained; 4, the fast flotation molybdenum tailings obtained through the molybdenum ore pulp are subjected to roughing, and molybdenum rough concentrates and molybdenum rough tailings are obtained; and 5, the fast flotation molybdenum tailings obtained through the molybdenum rough concentrates or the molybdenum rough concentrates in the step 4 are subjected to pre-selection at first and then subjected to two-stage regrinding, selection for eight times and scrubbing for one time, and molybdenum fine tailings and the ordinary molybdenum concentrates where the grade of molybdenum is 52%-55% are obtained. According to the process for step-by-step production of the high-grade molybdenum concentrates and the ordinary molybdenum concentrates, a differential flotation technology is utilized, the molybdenum concentrates of different grades are obtained, the number of selection is shortened, and the total recovery rate of the molybdenum concentrates is increased.

Description

technical field [0001] The invention belongs to the technical field of molybdenum concentrate production, in particular to a process for step-by-step production of high-grade molybdenum concentrate and common molybdenum concentrate. Background technique [0002] Molybdenite is the most widely distributed molybdenum ore among molybdenum-bearing minerals. It has natural hydrophobicity and good buoyancy, and is the main raw material for the production of molybdenum concentrate. However, molybdenite raw ore molybdenum grade is low, it must be processed before it can be produced. Ore body fractures and fault dislocations occurred during the mineralization process, resulting in the variation of the crystal shape of molybdenite and reducing its buoyancy; and the film-like structure, over-crushing and mudification of some molybdenites also seriously affected Floatability of molybdenite. At the same time, point-shaped molybdenite is wrapped in gangue minerals and is not easy to dis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00B03D1/018B03D1/02B03D101/02B03D101/06B03D103/02
CPCB03B7/00B03D1/018B03D1/025B03D2201/02B03D2201/06B03D2203/02
Inventor 王漪靖周少珍俞国庆于传兵王永超宋磊李卫昌胡志凯
Owner JINDUICHENG MOLYBDENUM CO LTD
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