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Roasting process for extracting vanadium from stone coal

A roasting process, stone coal technology, applied in the field of roasting process for extracting vanadium from stone coal, can solve the problems of poor effect, influence on oxidation effect, high oxygen consumption, etc., and achieve the effect of avoiding mutual restriction, good roasting effect and high conversion efficiency

Active Publication Date: 2014-02-19
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditionally, stone coal is roasted in a rotary kiln for decarburization and vanadium conversion. However, there are many problems in roasting with a rotary kiln. First, decarburization and vanadium conversion (oxidation) are carried out in the same rotary kiln. Due to decarburization The conversion of vanadium and vanadium takes a long time to complete, and the processing capacity of stone coal is large, resulting in large specifications, low speed, low utilization efficiency, and high investment costs of the rotary kiln for vanadium extraction from stone coal; secondly, the reaction of decarburization and oxidation The properties are different. Decarburization needs to consume a large amount of oxygen, but the required reaction time is relatively short, while the amount of oxygen required for vanadium conversion is relatively small, but the required reaction time is relatively long. The two systems in the same device system affect each other and contain each other. The effect is not good; again, the decarburization reaction is a violent oxidation reaction, which requires a good oxidizing atmosphere, and the contact between stone coal and air in the rotary kiln is mostly achieved by the rotation of the kiln body, and the contact is not sufficient, which affects the oxidation effect

Method used

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  • Roasting process for extracting vanadium from stone coal
  • Roasting process for extracting vanadium from stone coal
  • Roasting process for extracting vanadium from stone coal

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0031] In this embodiment, the decarburization device is a fluidized fluidized fluidized furnace, and the vanadium conversion device is a rotary kiln 200 . Wherein the rotary kiln 200 is connected with the fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized fluidized furnace" is used to transform the stone coal roasted and decarburized in the fluidized fluidized fluidized fluidized fluidized fluidized fluidized f...

no. 2 example

[0073] In this embodiment, both the decarburization unit and the vanadium conversion unit are fluidized fluidized fluidized furnaces.

[0074] Optionally, the decarbonization unit for decarbonization of stone coal has the same structure as the vanadium conversion unit for vanadium conversion. That is to say, the decarburization unit and the vanadium conversion unit can both be as described above figure 2 The example shown in the fluidized fluidized fluidized boiling furnace. Of course, the decarburization unit and the vanadium conversion unit can both be as above-mentioned image 3 The example shown in the fluidized fluidized fluidized boiling furnace.

[0075] Optionally, the decarburization unit for stone coal decarbonization has a different structure than the vanadium conversion unit for vanadium conversion. It can be understood here that the decarburization device can be as above figure 2 The fluidized fluidized fluidized fluidized furnace of the embodiment shown in,...

no. 3 example

[0078] In this embodiment, the decarbonization device is a stone coal combustion chamber 300, and the vanadium conversion device is a rotary kiln 200, wherein the rotary kiln 200 is such as Figure 4 The rotary kiln shown in.

[0079] like Figure 5 As shown, the stone coal combustion chamber 300 has a stone coal feed port 301 and a stone coal discharge port 302 for adding stone coal, and the stone coal combustion chamber 300 is provided with a combustion chamber for injecting fuel and air into the stone coal combustion chamber 300. chamber nozzle 400. Add stone coal from the stone coal feeding port 301 , and inject fuel and air into the stone coal combustion chamber 300 from the combustion chamber nozzle 400 , so that the stone coal undergoes decarbonization reaction in the stone coal combustion chamber 300 . Specifically, such as Figure 5 As shown, the fuel is fed into the coal combustion chamber 300 through the combustion chamber nozzle 400 , and at the same time, the f...

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Abstract

The invention discloses a roasting process for extracting vanadium from stone coal. The process comprises the following steps of: decarburizing the stone coal in an independent decarburization device; and performing vanadium transformation on the decarburized stone coal in an independent vanadium transformation container. According to the roasting process for extracting the vanadium from the stone coal, the independent decarburization device and the independent vanadium transformation container are used for the decarburization of the stone coal and the vanadium transformation respectively, so that the mutual restriction of the decarburization and the vanadium transformation is avoided, conditions in the decarburization device and the vanadium transformation container can be respectively and independently controlled conveniently, the process has a roasting effect, and the immersion ratio of products is high. In addition, the whole equipment is low in cost and small in floor area, and the investment is reduced.

Description

technical field [0001] The invention relates to a roasting process for extracting vanadium from stone coal. Background technique [0002] Roasting is a key process for extracting vanadium from stone coal, which has a significant impact on the conversion rate of vanadium and the efficiency of vanadium extraction. Traditionally, stone coal is roasted in a rotary kiln for decarburization and vanadium conversion. However, there are many problems in roasting with a rotary kiln. First, decarburization and vanadium conversion (oxidation) are carried out in the same rotary kiln. Due to decarburization The conversion of vanadium and vanadium takes a long time to complete, and the processing capacity of stone coal is large, resulting in large specifications, low speed, low utilization efficiency, and high investment costs of the rotary kiln for vanadium extraction from stone coal; secondly, the reaction of decarburization and oxidation The properties are different. Decarburization ne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/10C22B34/22
Inventor 吕东甘炤坤徐月和李少华杜国山
Owner CHINA ENFI ENGINEERING CORPORATION
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