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Method for roasting vanadium pentoxide extracted by scherbinaite coal contained primary ore

A vanadium pentoxide, primary technology, applied in vanadium oxide and other directions, can solve the problems of high cost and low slag output, and achieve the effects of low production cost, low sulfuric acid consumption and short process flow

Inactive Publication Date: 2010-12-15
淅川县玉典钒业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, because the primary ore of vanadium-containing stone coal contains 8-10% carbon, if it is directly roasted in a rotary kiln or a rotary kiln without decarbonization and adding additives (barium salt), the slag yield is extremely low, only 1 / 8 to 1 / 10 of the output of oxide ore, and the cost is high
Successful examples of industrial vanadium extraction by non-boiling roasting and rotary kiln roasting of primary ore containing vanadium-bearing stone coal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Select primary ore of vanadium-containing stone coal, whose fixed carbon content is 10.56% (if the fixed carbon content is less than 8%, coal must be blended to make the fixed carbon content reach more than 8%, in order to meet the requirements of boiling roasting), crushed to more than 5mm, into the main 1. The auxiliary bed is 3 square meters fluidized fluidized fluidized boiling furnace. The main bed and auxiliary bed are installed side by side with equal volume. The blast intensity of the main bed is greater than that of the auxiliary bed. A cooling pipe is installed inside to connect with the waste heat boiler, and the steam produced is used for heating and leaching, and the temperature of the roasting furnace of the main and auxiliary beds of the fluidized fluidized fluidized fluidized furnace is controlled to 850-900°C, and the coarse slag obtained from the roasting of the main bed is discharged from the bottom of the main bed. Discharge, fine slag and fine ash ar...

Embodiment 2

[0023] Select primary ore of vanadium-containing stone coal, its fixed carbon content is 9.6% (if the fixed carbon content is less than 8%, coal must be blended to make the fixed carbon content reach more than 8%, in order to meet the requirements of boiling roasting), crushed to over 7mm, into the main 1. The auxiliary bed is 3 square meters fluidized fluidized fluidized boiling furnace. The main bed and auxiliary bed are installed side by side with equal volume. The blast intensity of the main bed is greater than that of the auxiliary bed. A cooling pipe is installed inside to connect with the waste heat boiler, and the steam produced is used for heating and leaching, and the temperature of the roasting furnace of the main and auxiliary beds of the fluidized fluidized fluidized fluidized furnace is controlled to 850-900°C, and the coarse slag obtained from the roasting of the main bed is discharged from the bottom of the main bed. Discharge, fine slag and fine ash are dischar...

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Abstract

The invention relates to a method for roasting vanadium pentoxide extracted by scherbinaite coal contained primary ore. After being smashed to certain mesh degree, scherbinaite coal contained primary ore is sent into the main bed and the secondary bed of a fluidzed bed furnace; different blasting intensities when the main bed and the secondary bed roast are controlled, twice fluidization roasting is carried out to completely decarburize; after the decarburization material of the main bed and the secondary bed is added with barium salt, the mixture is roasted in a rotary kiln. The invention has the beneficial effects of short process flow, simple and easy operation, high yield and low production cost and can realize production automation control; vanadium has high immersion ratio which can be above 80%; and sulfuric acid consumption amount is low, only about 50 kg of sulfuric acid is consumed for each ton of cinder. The invention is the optimum path for comprehensively utilizing scherbinaite coal contained primary ore and can realize 'one ore three factories', i.e. a stone coal mine, a power station, a vanadium plant and a cement plant. The scherbinaite coal contained primary ore is in fluidized bed roasting to generate electricity; electricity is generated for the cinder to extract vanadium; the vanadium extracting tailings are high-quality filler of the cement plant to realize comprehensive utilization of resources, thus creating great economic benefit and social benefit.

Description

technical field [0001] The invention relates to the metallurgical industry of rare nonferrous metals, in particular to a roasting method for extracting vanadium pentoxide from primary ore of vanadium-containing stone coal. Background technique [0002] The roasting methods for extracting vanadium pentoxide from vanadium-containing stone coal currently include sodium, calcification, and barium salt ingredients into the open hearth furnace and shaft kiln roasting process / adding barium salt to the oxidized ore into the rotary kiln and rotary kiln roasting process. [0003] However, because the primary ore of vanadium-containing stone coal contains 8-10% carbon, if it is directly roasted in a rotary kiln or a rotary kiln without decarbonization and adding additives (barium salt), the slag yield is extremely low, only 1 / 8 to 1 / 10 of the output of oxide ore, and the cost is high. At present, there are successful examples of vanadium-extracting industrial vanadium-bearing stone co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/02
Inventor 杨秋良
Owner 淅川县玉典钒业有限责任公司
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