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Vanadium ore oxidizing roast composite additive and vanadium ore calcination method

A compound additive and oxidative roasting technology, applied in the field of vanadium ore roasting, can solve the problems of low roasting conversion rate, pollute the environment, single components, etc., and achieve the effects of improving economic efficiency, low price and good adaptability

Active Publication Date: 2009-08-12
湖北汇锂新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a composite additive for vanadium ore oxidative roasting, which aims to solve the technical problems of the existing vanadium ore roasting additives with single components, low roasting conversion rate, environmental pollution and high cost

Method used

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  • Vanadium ore oxidizing roast composite additive and vanadium ore calcination method
  • Vanadium ore oxidizing roast composite additive and vanadium ore calcination method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The composition and ratio of the vanadium ore oxidation roasting composite additive are: causticizing mud 50%, Glauber's salt powder 35%, limestone ore powder 3%, dolomite ore powder 12%, and the composition ratio is mass percent (the percentages in the following descriptions are all mass percent).

[0034] Vanadium-containing ore powder is a mixed ore powder of weathered stone and stone coal, of which 80% is weathered stone powder and 20% is stone coal powder. The vanadium content measured by the alkali fusion method is V 2 o 5 That works out to be 1.42%.

[0035] Experimental steps: Step 1. Take 100g of vanadium-containing ore powder sieved with 60 meshes, and take 10g of composite additives; add appropriate amount of water, mix evenly, and make mineral balls with a diameter of 20-30mm.

[0036] Step 2. Put the ore balls into a horse boiler for roasting. When the roasting temperature rises to 850° C., keep the temperature at 830° C. to 850° C. for 3 hours. Close th...

Embodiment 2

[0039] The composition and proportion of the vanadium ore oxidation roasting compound additive are: industrial grade calcium carbonate powder 70%, industrial grade sodium sulfate powder 17%, industrial grade calcium oxide powder 10%, industrial grade magnesium carbonate powder 3%.

[0040] The vanadium-containing ore powder is stone coal ore powder, and its vanadium content is measured by the alkali melting method as V 2 o 5 That counts as 1.2%.

[0041] Experimental procedure: Step 1. Take 100g of vanadium-containing ore powder sieved with 60 meshes, add 8g of composite additives; add appropriate amount of water and mix evenly to make mineral balls with a diameter of 20-30mm.

[0042] Step 2, (with embodiment one)

[0043] Step 3, pulverize the roasted mineral balls, put 1.20 g of mineral powder in a conical flask, add 50 ml of 15% sulfuric acid solution, heat to boil, cool to room temperature, and the conversion rate is measured to be 88.1%.

Embodiment 3

[0045] The composition and ratio of the vanadium ore oxidation roasting composite additive are: caustic mud 70%, Glauber's salt powder 5%, limestone powder 5%, dolomite powder 20%.

[0046] Vanadium-containing ore powder: using weathered stone ore powder, the vanadium content measured by alkali fusion method is V 2 o 5 That counts as 1.75%.

[0047] Experimental steps:

[0048] Step 1. Take 100g of vanadium-containing ore powder sieved by 60 meshes, add 10g of composite additives, add appropriate amount of water and mix evenly, and make mineral balls with a diameter of 20-30mm.

[0049] Step 2, (with embodiment one)

[0050] Step 3, pulverize the roasted mineral balls, take 1.00 g of mineral powder and place it in a conical flask, add 50 ml of 15% sulfuric acid solution, heat to boil, then cool to room temperature, and the conversion rate is measured to be 85.4%.

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Abstract

The invention relates to composite additive for oxidizing roasting of vanadium ores and a method for roasting the vanadium ores. The additive is prepared by mixing four powder materials which are crushed into 20 to 80 meshes in percentage by mass: 30 to 95 percent of calcium carbonate powder, 0 to 50 percent of magnesium carbonate powder, 0 to 20 percent of calcium oxide powder and 0 to 50 percent of sodium sulfate powder, wherein the addition of the latter three powder materials is not 0 at the same time. The additive has low manufacturing cost, is well adaptive to various vanadium-containing ores, has the roasting conversion rate which reaches more than 85 percent and is more than 20 percent higher than that of the prior additive, and solves the technical problems of single composition, low roasting conversion rate, environmental pollution, high cost and the like in the prior additive for roasting the vanadium ores. Because the additive is well adaptive to various vanadium-containing ores, the additive can be taken as the roasting additive of various vanadium ores.

Description

technical field [0001] The invention relates to an additive for roasting vanadium ore and a roasting method for vanadium ore using the additive. Background technique [0002] There are a large amount of vanadium-bearing carbonaceous shale and vanadium-bearing regolith in southern my country. With the wide application of vanadium in metallurgy, chemical industry, new energy and other fields, the development of vanadium-bearing carbonaceous shale and vanadium-bearing weathered fossil mineral resources has great economic and social significance. The key process for effectively extracting vanadium in carbonaceous shale and regolith is roasting to convert non-pentavalent vanadium in vanadium-containing carbonaceous shale and regolith into pentavalent vanadium as much as possible. The additives in the roasting process can increase the conversion rate of non-pentavalent vanadium into pentavalent vanadium, which is one of the main factors affecting the conversion rate of roasting. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B1/24
Inventor 侯作义董鑫周万明
Owner 湖北汇锂新能源科技有限公司
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