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Process for extracting vanadium from stone coal by acid method for performing curing pretreatment on raw ore

A technology for pretreatment and stone coal acid, applied in the field of vanadium extraction by stone coal acid method, can solve the problems of wasting vanadium-containing resources, low sedimentation performance leaching rate, etc., and achieves improved leaching rate, filtration and sedimentation performance, iron content reduced effect

Inactive Publication Date: 2010-04-21
SHAANXI ZHENGDAO INVESTMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practice, there are many types of stone coal, especially the stone coal which is difficult to acid leaching and filtration and has poor sedimentation performance. 2 o 5 The leaching rate is very low, which greatly wastes vanadium-containing resources

Method used

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  • Process for extracting vanadium from stone coal by acid method for performing curing pretreatment on raw ore
  • Process for extracting vanadium from stone coal by acid method for performing curing pretreatment on raw ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036]Put the raw ore crushed to 1 mm into the aging furnace; heat the aging furnace, the temperature of the aging heating is controlled at 600°C, and the aging time is 2 hours; stop heating, take the matured clinker out of the aging furnace, and let it stand to cool down to Appropriate temperature for wet grinding; then wet grind the matured clinker to the particle size required by the acid leaching process; then carry out the rest of the procedures, V 2 o 5 The leaching rate was 65%.

Embodiment 2

[0038] Put the raw ore broken to 4mm into the slaking furnace; heat the slaking furnace, the temperature of the slaking heating is controlled at 900°C, and the slaking time is 4 hours; stop heating, take out the matured clinker from the slaking furnace, and let it stand to cool down to Appropriate temperature for wet grinding; then wet grind the matured clinker to the particle size required by the acid leaching process; then carry out the rest of the procedures, V 2 o 5 The leaching rate was 66%.

Embodiment 3

[0040] Put the raw ore broken to 2mm into the slaking furnace; heat the slaking furnace, the temperature of the slaking heating is controlled at 650°C, and the slaking time is 2.5 hours; stop heating, take the matured clinker out of the slaking furnace, let it stand and cool down to Appropriate temperature for wet grinding; then wet grind the matured clinker to the particle size required by the acid leaching process; then carry out the rest of the procedures, V 2 o 5 The leaching rate was 68%.

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Abstract

The invention discloses a process for extracting vanadium from stone coal by an acid method for performing curing pretreatment on raw ore, which mainly comprises the steps of raw ore grinding, acid leaching, liquid-solid separation, solution pretreatment, extraction and back-extraction, oxidation, vanadium precipitation, red vanadium obtaining and deamination. Before the step of acid leaching, the process also comprises raw ore curing pretreatment steps, namely, smashing the raw ore and filling the smashed raw ore in a furnace, curing and heating the smashed raw ore, taking a clinker out and wet milling the clinker. The invention can destroy the isomorphism of vanadium, remarkably improve the leaching rate of V2O5, and can improve the leaching rate of the V2O5 from 30-50 percent to 65-75 percent, reduces iron content in a solution by half to one third, improves filtering and depositing performances of acid dipping slurry, has no environmental pollution because no chemical agent is added in the curing step, and achieves the aim of saving energy and reducing emission by comprehensively using the own heat energy of the stone coal.

Description

technical field [0001] The invention relates to a process for extracting vanadium from stone coal by acid method, in particular to a process for extracting vanadium by acid method from stone coal for slaking and pretreating raw ore. Background technique [0002] Vanadium-bearing stone coal is one of the unique rich vanadium resources in my country. Therefore, the industrial use of vanadium-containing stone coal to extract V 2 o 5 There are also many crafts. The previous research results on the material composition of stone coal show that the material composition of vanadium-containing stone coal is relatively complex, and the occurrence state and valence state of vanadium vary and are finely dispersed. It is generally believed that most of the vanadium in stone coal is V +3 The form exists in clay minerals such as mica and kaolin. In mica, vanadium replaces Al in the silicon-oxygen tetrahedral "double network layer" and aluminum-oxygen octahedral "single network layer" i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/22C22B1/02
Inventor 杜怀亭
Owner SHAANXI ZHENGDAO INVESTMENT
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