Novel environment-protection compound additive roasted by bone coal vanadium ore

A composite additive, stone coal vanadium technology, applied in the field of new environmental protection composite additives for roasting stone coal vanadium ore, can solve the problems of high sodium content, harsh working environment, serious environmental pollution, etc., to reduce the roasting conversion temperature and reduce exhaust gas emissions Quantity, the effect of controlling exhaust pollution

Inactive Publication Date: 2008-05-14
HUBEI HANHAI MINE INVESTMENT
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AI Technical Summary

Problems solved by technology

[0003] 1. Harmful gases such as chlorine gas, hydrogen chloride, sulfur trioxide, and arsenic trioxide cannot be treated centrally, causing serious pollution to the environment
[0004] 2. The amount of table salt is large, and it is easy to agglomerate during the roasting process, so that the oxidation conversion of low-priced vanadium is low, generally only 40-50%, and the sodium content in waste residue and wastewater is high, which is easy to cause harm to the soil environment
[0005] 3. It is difficult to control the roasting temperature of the flat kiln, the production workshop is extr

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0050] Additive formulation and implementation

[0051] (1) 2%Na 2 CO 3 , 2%Na 2 SO 4 , 9% NaCl, 13% (according to the total mass of the material);

[0052] (1) 0.025%V 2 o 5 , 1% MnO 2 , 3.975% slag, 5% in total;

[0053] (3) 82% of stone coal vanadium ore and additive (1) + (2) 18% are finely ground to 100 mesh (0.15mm) and fully mixed evenly.

[0054] A sample without V 2 o 5 , MnO 2 Slag, all other samples contain V 2 o 5 , MnO 2 of slag. Under the condition of 800°C, roast at constant temperature for 2 hours, the results are shown in Table 1:

[0055] Table 1 Roasting results of different additives

[0056]

[0057] It can be seen from the examples that the additives containing V 2 o 5 , MnO 2 Iron slag, vanadium slag and manganese slag, the conversion and leaching rate of stone coal vanadium ore roasting is significantly improved than the conversion and leaching rate of no slag, which fully demonstrates the effectiveness of the new environmental protec

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PUM

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Abstract

The invention relates to a novel environment-friendly compound additive by stone coal vanadium ore roasting which comprises a conversion agent which can generate vanadium to be easily leached by sulfate with low concentration, a catalyst and an oxidizer which can promote low-price vanadium catalysis and oxidation, and slag which can convert and solidify harmful gas which is generated by roasting the stone coal. The conversion agent, the catalyst, the oxidizer and the slag are mixed and then dried according to a certain proportion, and the acquired mixture is ground into 100 meshes (0.15mm), thus obtaining the novel environmental protection compound additive. The additive and the stone coal vanadium ore are mixed uniformly according to a certain proportion, and then the acquired mixture is roasted for more than two hours in a constant temperature rotary kiln. The conversation rate of the vanadium in the stone coal vanadium ore can reach over 80 percent with low loss on ignition of the additive, thus having less waste gas and pertaining to the novel environmental protection compound additive. The additive has universal applicability for roasting conversation of the vanadium of the stone coal vanadium ore exists in illite or other minerals in form of low price form absorption or isomorphism.

Description

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Claims

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Application Information

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Owner HUBEI HANHAI MINE INVESTMENT
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