Method for extracting vanadic anhydride from stone coal

A technology of vanadium pentoxide and stone coal vanadium, applied in vanadium oxide and other directions, can solve the problems of high energy consumption, environmental pollution, large land occupation, etc., and achieve high comprehensive recovery rate, wide process adaptability and low production cost. Effect
CN101274778BActive Publication Date: 2010-06-02ZIJIN MINING GROUP
6 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZIJIN MINING GROUP
Publication Date
2010-06-02

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

The invention relates to a method for extracting vanadic oxide from stone coal, which comprises the process flow in sequence as follows: mixing and fine grinding, limestone mine is added into stone coal vanadium ore for carrying out mixing and fine grinding; pellet making; roasting; grinding of pellets; lixiviation, water and vitriol are added for carrying out lixiviation at normal temperature; filtration, leached slag and leached liquid are filtered; washing-pretreatment of the leached liquid; ion exchange; desorption; regulation of PH value; sedimentation, sedimentation is carried out to obtained ammonium meta-vanadate; washing for removing the ion of incidental elements absorbed on the surface of ammonium meta-vanadate precipitation; drying; roasting and obtaining the vanadic oxide products with the metallurgical purity of 98 to 99. The method is characterized by wide technical applicability, high comprehensive recovery ratio, low exhaust emission, low energy consumption, low production cost and high purity of products, and that waste water can be recycled, and so on.
Need to check novelty before this filing date? Find Prior Art

Description

1. Technical field

[0001] The invention relates to a method for extracting vanadium pentoxide from stone coal. 2. Background technology

[0002] At present, most of the domestic stone coal vanadium mines use sodium salt roasting extraction method. The process flow is ore crushing, ball milling, ball making, sodium salt roasting, ore ball grinding, leaching with sulfuric acid at a temperature of 80-100 ° C, extraction and stripping , ammonia precipitation, ammonium metavanadate washing and dehydration, and roasting into vanadium pentoxide. The process has high labor intensity, high energy consumption, low comprehensive recovery rate, and produces Cl during roasting. 2 , HCl and other toxic gases, causing serious pollution.

[0003] In order to eliminate serious exhaust gas pollution and increase the recovery rate, many domestic research institutes have carried out exploration and research in various ways in the past ten years. For example, the Chinese patent discloses "a l...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More