Tungsten-bearing limonite processing method

A technology of limonite and limonite, applied in the field of comprehensive utilization of resources, can solve problems such as difficult to achieve separation effect and comprehensive recovery and utilization of valuable resources, so as to improve comprehensive utilization efficiency, realize high-efficiency enrichment and selectivity Discrete, economical and reliable results

Active Publication Date: 2014-03-05
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the development and utilization of secondary tungsten minerals are still blank, such as tungsten blooms, iron tungsten blooms, tungsten-containing limonites, and tungsten-containing limonites formed by the oxidation of scheelite and wolframite due to geological structural dynamics and weathering. Wait
[0003] Conventional beneficiation methods (gravity separation, magnetic separation, flotation) for tungsten-containing limonite are difficult to achieve the separation effect, and it is difficult to realize the comprehensive recovery and utilization of valuable resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The process method is used to process tungsten-containing limonite containing 41wt% iron and 1.8wt% tungsten. Use dodecylamine as collector (100g / t), adjust pH to 4.5 with dilute sulfuric acid, use sodium humate (500g / t) as inhibitor, carry out flotation desiliconization, and flotation concentrate of tungsten limonite The ore and coke are mixed in a mass ratio of 5:1, the amount of reducing roasting enhancer sodium sulfite is 20% of the mass of the mixture of tungsten-containing limonite flotation concentrate and coke, the roasting temperature is 850 ° C, and the roasting time is 45 minutes. The product is ground by a mill until -0.074mm particles account for 70%, and neutral leaching is carried out at a solid-liquid volume ratio of 1:5. The leaching temperature is 50°C and the leaching time is 30 minutes. The obtained liquid is the tungstate solution, and the leaching residue Magnetic separation is carried out in a 400GS magnetic field, and the obtained concentrate is ...

Embodiment 2

[0032] The process method is used to process tungsten-containing limonite containing 32wt% iron and 3.1wt% tungsten. Use dodecylamine as collector (80g / t), adjust pH5.0 with dilute sulfuric acid, use caustic starch (500g / t) as inhibitor, carry out flotation desiliconization, and flotation concentrate of tungsten limonite Mix with coke in a mass ratio of 5:1, the amount of reducing roasting enhancer sodium nitrate is 20% of the mass of the mixture of tungsten-containing limonite flotation concentrate and coke, the roasting temperature is 900 ° C, and the roasting time is 30 minutes. The product is ground by a mill until -0.074mm particles account for 70%, and neutral leaching is carried out at a solid-liquid volume ratio of 1:5. The leaching temperature is 50°C and the leaching time is 30 minutes. The obtained liquid is the tungstate solution, and the leaching residue Magnetic separation is carried out in a 300GS magnetic field, and the obtained concentrate is iron concentrate,...

Embodiment 3

[0036]The process method is used to process tungsten-containing limonite containing 21wt% iron and 6.34wt% tungsten. Use dodecylamine as collector (200g / t), adjust pH5.0 with dilute sulfuric acid, use sodium carboxymethylcellulose (200g / t) as inhibitor, carry out flotation desiliconization, and tungsten-containing limonite The flotation concentrate and coke are mixed in a mass ratio of 5:1, the amount of reducing roasting enhancer sodium bicarbonate is 20% of the mass of the mixture of tungsten-containing limonite flotation concentrate and coke, the roasting temperature is 900 °C, and the roasting time is After 30 minutes, grind the roasted product until the -0.074mm particles account for 70%, and perform neutral leaching according to the solid-liquid volume ratio of 1:5. The leaching temperature is 50°C, and the leaching time is 30 minutes. The obtained liquid is tungstic acid Salt solution, leached slag were separated by magnetic separation in a 500GS magnetic field, the obt...

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Abstract

The invention discloses a tungsten-bearing limonite processing method. The method includes: subjecting the tungsten-bearing limonite to flotation to remove silicon-bearing ore so as to obtain tungsten-bearing limonite concentrate; mixing the tungsten-bearing limonite with coke and reduction roasting enhancer, performing reduction roasting, grinding a product of reduction roasting, and performing neutral leaching to obtain tungstate solution and leaching residue; subjecting the leaching residue to magnetic separation in magnetic field so as to obtain iron concentrate and valuable metal tailing. The equipment used in the method is simple, the process flow is short, operation is simple, and the method is economical and reliable; efficient enrichment and selective separation of valuable elements in the low-grade tungsten-bearing limonite can be achieved, and comprehensive utilization rate of the tungsten-bearing limonite resources is increased effectively.

Description

technical field [0001] The present invention relates to a method for processing tungsten-containing limonite, in particular to a new method for efficiently extracting tungsten elements from tungsten-containing limonite and comprehensively recovering iron, manganese, copper, bismuth, cobalt and other valuable metal elements at the same time. It belongs to the field of comprehensive utilization of resources. Background technique [0002] my country is rich in tungsten ore resources and has maintained a dominant position in the world for a long time. It is currently the world's largest producer, consumer and supplier of tungsten. Foreign countries mainly develop scheelite, and China has been mainly mining wolframite resources for a long time. Wolframite deposits are mostly steeply inclined thin veins, which have the advantages of good quality, easy mining, and easy selection, and are relatively concentrated in South China, which is convenient for development and utilization . ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/001C22B1/02C22B3/04B03C1/015
Inventor 孙伟韩海生刘文莉唐鸿鹄
Owner CENT SOUTH UNIV
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