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Raw material pretreatment process for extracting vanadium from vanadium slag

A technology for pretreatment and vanadium slag, applied in the field of vanadium extraction from vanadium slag, can solve problems such as pollution, waste of raw materials, unfavorable costs, etc., and achieve the effects of reducing production costs, increasing conversion rate, and reducing vanadium loss

Active Publication Date: 2013-04-03
攀枝花卓越钒业科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional raw material pretreatment process has the following disadvantages: using a rotary kiln for drying materials, dust flying when raw materials are dried, waste of raw materials, serious pollution, and occupying the rotary kiln for roasting equipment, affecting the production of vanadium pentoxide; the most important When adding sodium salt and mixing ingredients, the demand for sodium salt is large, which is not conducive to cost saving

Method used

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  • Raw material pretreatment process for extracting vanadium from vanadium slag

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Embodiment 1

[0032] Embodiment one inventive method handles vanadium slag

[0033] The vanadium slag is in the form of black fine particles, and the mass fraction of the main components is shown in Table 1:

[0034] Table 1 Main components of vanadium slag

[0035] name

V 2 o 5 / %

-120mesh / %

MFe / %

h 2 O / %

Vanadium-containing residue

1.60

45.0

2.5

20.0

[0036] Add quantitative water to the vanadium slag with the particle size in Table 1, put it into a wet ball mill (model ∮1.5×5.7m) according to the volume of vanadium slag: water = 1:3, and grind it finely. 2mm)" to screen out large particles of metallic iron and control it within the qualified range, that is, MFe≤1.0%. The particle size of vanadium slag after ball milling is controlled at -120 mesh and the amount is ≥85.0%. The slurry passes through a rubber belt filter ( The model is DU25 / 1800) and the suction filter is clean, and the moisture content of the wet abrasive is c...

Embodiment 2

[0044] Embodiment two inventive method handles vanadium slag

[0045] The vanadium slag is in the form of black fine particles, and the mass fraction of the main components is shown in Table 1.

[0046] Add quantitative water to the vanadium slag with the particle size in Table 1, put it into a wet ball mill (model ∮1.5×5.7m) according to the volume of vanadium slag: water = 1:3, and grind it finely. 2mm)" to screen out large particles of metallic iron and control it within the qualified range, that is, MFe≤1.0%. The particle size of vanadium slag after ball milling is controlled at -120 mesh and the amount is ≥85.0%. The slurry passes through a rubber belt filter ( The model is DU25 / 1800), and the water content of the wet abrasive is controlled between 15 and 20%, which meets the process requirements. The throughput is 230 tons / 24 hours, which fully meets the production requirements of 2 lines. The specific process indicators of the wet abrasive are shown in the table 4.

...

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Abstract

The invention discloses a raw material pretreatment process for extracting vanadium from vanadium slag. The process comprises the following steps of: a, performing wet ball milling on the vanadium slag, and filtering the vanadium slag; b, drying the vanadium slag filtered in the step a in a drying kiln, and controlling the drying temperature to be between 150 and 300 DEG C; and c, adding a sodium salt adjuvant into the vanadium slag dried in the step b, and performing sodium roasting on the vanadium slag. By adopting the process, the vanadium slag is high in alkalinity, so that an alkali is not needed, the total amount of an additive during material blending is reduced, the used amount of a sodium salt is less than one half of that of the conventional process additive, and then the production cost is reduced. According to the process, a rotary kiln is not independently used for drying the vanadium slag, a vertical drying kiln is directly used, and the vanadium slag can be dried by using the waste heat generated in the sodium roasting process, so that the cost is reduced to the maximum extent and the space occupied by equipment is reduced.

Description

technical field [0001] The invention belongs to the technical field of vanadium extraction from vanadium slag, and in particular relates to a raw material pretreatment process for extracting vanadium with vanadium slag. Background technique [0002] Iron and steel plants will get a lot of high V 2 o 5 The content of vanadium slag is called high vanadium slag. The high vanadium slag will be V 2 o 5 The vanadium-containing residue with relatively low content is directly called vanadium slag. Vanadium slag usually contains V 2 o 5 1.6~2.5%, MFe0.8~2.5%, H 2 O15.0~20.0%, the rest is SiO 2 , CaO, MgO, MnO, Cr 2 o 3 and other impurities, the particle size is usually 45-60% through a 120-mesh sieve. Vanadium slag is mainly used for roasting to extract vanadium, so that the remaining vanadium can be recycled to produce flake vanadium pentoxide. [0003] The traditional process of extracting vanadium from vanadium slag mainly includes 5 processes of raw material pretreatm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B1/00C22B34/22
Inventor 张坚
Owner 攀枝花卓越钒业科技股份有限公司
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