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A method for recovering microfine coal in acidic leaching slag of stone coal vanadium ore

A technology of stone coal vanadium ore and microfine particles, applied in solid separation, flotation, etc., can solve the problems of low conversion rate and leaching rate of vanadium, long and complicated process, waste of coal-containing minerals, etc., to simplify the grinding process, The effect of reasonable process and effective recovery

Active Publication Date: 2016-09-14
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The main purpose of the flotation decarburization process of stone coal vanadium ore is to serve the roasting operation, and it is aimed at the stone coal vanadium ore with high carbon content, because when the carbon content in the stone coal vanadium ore is too high, it is easy to make the roasting operation If the temperature is too high, agglomeration and overoxidation will occur, resulting in low conversion rate and leaching rate of vanadium
In the traditional stone coal vanadium ore leaching operation with roasting process, when encountering stone coal vanadium ore with high carbon content (carbon content higher than 15wt%), the stone coal vanadium ore flotation decarburization process will be partially adopted ( Combustion decarbonization is more used), the purpose is to reduce the carbon content of the baked stone coal vanadium ore to about 5wt%, this process generally does not consider the quality of the removed coal-bearing minerals, this part is removed The coal-containing minerals will be wasted in vain; with the subsequent roasting operation, the remaining coal in the stone coal vanadium ore will also become unrecoverable; Before the roasting operation, the obtained decarbonized stone coal vanadium ore has to be dehydrated, filtered and dried, which obviously makes the process lengthy and complicated

Method used

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  • A method for recovering microfine coal in acidic leaching slag of stone coal vanadium ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: The acid leaching slag of stone coal vanadium ore in this example is a high siliceous stone coal vanadium ore acid leaching slag sample obtained from Jianggu, Guizhou, containing 6.14wt% of fixed carbon, SiO 2 81.36wt%, CaO 0.83wt%, MgO 0.71wt%, Al 2 o 3 3.09wt% etc. use as figure 1 The process flow shown, the specific process parameters and beneficiation indicators are as follows:

[0030] (1) Use high-frequency vibrating screen to pre-screen the acidic leaching residue of high-siliceous stone coal vanadium ore, and classify it into coarse-grained products with a particle size greater than 45 μm and fine-grained products with a particle size less than 45 μm

[0031] (2) Use a rod mill to finely grind the coarse-grained product obtained in step (1) until the ore particles with a particle size of less than 45 μm account for 90%, and the grinding concentration is 60wt%, and the obtained grinding product and step (1) are obtained The fine-grained products ...

Embodiment 2

[0037] Example 2: The acidic leaching slag of stone coal vanadium ore in this embodiment is a high-siliceous stone coal vanadium ore acid leaching slag sample obtained by sulfuric acid activation high-pressure leaching without roasting operation, which is taken from Shaanxi Shanjin, containing 7.81wt% of fixed carbon, SiO 2 73.96wt%, CaO 5.25wt%, MgO 0.063wt%, Al 2 o 3 0.47wt%; specific process parameters and beneficiation indicators are as follows:

[0038] (1) Use high-frequency vibrating screen to pre-screen the acidic leaching residue of high-siliceous stone coal vanadium ore, and classify it into coarse-grained products with a particle size greater than 45 μm and fine-grained products with a particle size less than 45 μm

[0039] (2) Use a rod mill to finely grind the coarse-grained product obtained in step (1) until the ore particles with a particle size of less than 45 μm account for 95%, and the grinding concentration is 65wt%, and the obtained grinding product and...

Embodiment 3

[0045] Example 3: The acidic leaching slag of stone coal vanadium ore in this example is a sample of acidic leaching slag of stone coal vanadium ore matured and leached with concentrated sulfuric acid, taken from Zhenyuan, Guizhou, containing 14.65wt% of fixed carbon, SiO 2 66.78wt%, CaO 0.64wt%, MgO 0.16wt%, Al 2 o 3 4.81wt%; specific process parameters and beneficiation indicators are as follows:

[0046] (1) Use high-frequency vibrating screen to pre-screen the acidic leaching residue of high-siliceous stone coal vanadium ore, and classify it into coarse-grained products with a particle size greater than 45 μm and fine-grained products with a particle size less than 45 μm

[0047] (2) Use a rod mill to finely grind the coarse-grained product obtained in step (1) until the ore particles with a particle size of less than 45 μm account for 85%, and the grinding concentration is 62wt%. The obtained grinding product and step (1) are obtained The fine-grained products are com...

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Abstract

The invention discloses a method for recovering coal in the acidic leaching slag of stone coal vanadium ore, which belongs to the technical field of mineral processing engineering; the leaching slag is pre-classified into coarse-grained products and fine-grained products; the coarse-grained products are finely ground, Grinding products and fine-grained products are combined into flotation feed; flotation roughing operation is divided into two stages, adding inhibitors, collectors and foaming agents in the first roughing, and adding collectors in the second roughing and foaming agent, the foam products of the two roughings are combined into a roughing concentrate, and the product in the tank is a roughing ore; the roughing ore is added with a collector and a foaming agent and then swept to obtain the swept ore and the final tailings , Sweep the middle ore and return to the second roughing operation; the rougher concentrate is selected twice, and a small amount of collector and foaming agent are added in the selection operation, and the middle ore selected for the first time returns to the first roughing operation , the middle ore selected for the second time returns to the first selection operation. The invention has reasonable technological process, simple process structure, wide adaptability to raw materials and easy industrial implementation.

Description

technical field [0001] The invention relates to a method for recovering fine grained coal in the acidic leaching slag of stone coal vanadium ore. This method uses a rod mill to open the ore after classification. The invention relates to a medicament for recovering microfine coal in the acidic leaching slag of low stone coal vanadium ore, and belongs to the technical field of mineral processing engineering. Background technique [0002] my country's stone coal reserves are 61.88 billion tons, and the V contained in stone coal 2 o 5 Reserves are about 118 million tons, of which V 2 o 5 The reserves of resources with a grade greater than 0.5% are about 77 million tons. More than 87% of domestic vanadium reserves are in stone coal vanadium ore, so there are a large number of stone coal vanadium ore leaching plants in China. [0003] Since the vanadium grade of stone coal vanadium ore is usually not high, roasting process is usually used in the traditional vanadium extractio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B1/00B03B1/04B03D1/02B03D101/02B03D101/04B03D101/06B03D103/08
Inventor 童雄吕昊子王祥坤谢贤邓政斌王晓韩彬侯凯
Owner KUNMING UNIV OF SCI & TECH
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