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Method for recycling fine pea coal in stone coal navajoite leaching residues

A stone coal vanadium ore, fine particle technology, applied in solid separation, flotation and other directions, can solve the problems of low vanadium conversion rate and leaching rate, long and complicated process flow, waste of coal-bearing minerals, etc., to simplify the grinding process, Reasonable process flow and effective recovery effect

Active Publication Date: 2014-11-19
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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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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  • Method for recycling fine pea coal in stone coal navajoite leaching residues

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 sieve 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 a...

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 sieve 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 sieve 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 recycling fine pea coal in stone coal navajoite leaching residues, and belongs to the technical field of mineral processing engineering. The leaching residues are graded in advance and divided into coarse products and fine products; the coarse products are ground fine, and the ground products and the fine products are combined to form flotation feeding ore; flotation roughing is divided into two procedures, inhibitors, collectors and foaming agents are added in primary roughing, collectors and foaming agents are added in secondary roughing, foam products produced in two times of roughing are combined to form roughed concentrate, and products in grooves are roughed middling; after collectors and foaming agents are added into the roughed middling, scavenging is carried out, scavenged middling and final tailing are obtained, and the scavenged middling return to the second roughing procedure; the roughed concentrate is concentrated twice, a small quantity of collectors and foaming agents are added in the concentration process, the middling in the primary concentration returns to the primary roughing process, and middling in the secondary concentration returns to the first concentration process. The method is reasonable in process procedure, simple in procedure structure, wide in raw material adaptability, and easy to implement industrially.

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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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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