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Alkali breakdown process of molybdenum-vanadium multi-metal metallurgy smelting materials

A polymetallic and material technology is applied in the field of alkali decomposition of molybdenum vanadium polymetallic metallurgical materials, which can solve the problems of difficulty in subsequent processes and affect the Mo recovery rate, and achieve the effects of high leaching rate and prevention of harmful gas generation.

Inactive Publication Date: 2008-12-31
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low temperature softening of high-impurity molybdenum-iron alloys, the decomposition method is sodium carbonate mechanically activated oxidation roasting-water leaching, the leaching rate of Mo can reach more than 95%, but the leaching rate of V is only about 60%, and P, As, Si, etc. A large number of impurities enter the leaching solution, which not only brings difficulties to the subsequent process, but also affects the recovery rate of Mo

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Vanadium-bearing stone coal mine (V 2 o 5 0.82%) 100g with limestone (CaCO 3 ) 10g crushed and mixed evenly, ground to negative 200 mesh, put into muffle furnace for oxidative roasting at 800°C for 2 hours, add water and stir the calcined sand obtained by calcification roasting, add 10g of sodium carbonate and 2g of sodium hydroxide for leaching at 80°C for 1.5 hours and filter , must contain V 2 o 5 0.11% filter residue 94.7g.

Embodiment 2

[0042] 100g of carbon-containing nickel-molybdenum ore is crushed, mixed with 40g of quicklime (CaO), and ground to minus 200 mesh, put into a muffle furnace for oxidative roasting at 600°C for 3 hours, and the calcined sand obtained by calcification roasting is stirred with water, and mixed according to Mo, V Add 5 times the theoretical amount of leaching and add sodium carbonate to leaching for 1 hour at 90°C. Carbon-containing nickel-molybdenum ore calcification oxidation roasting - sodium carbonate leaching test results (%) are as follows:

[0043] Mo Fe Ni Ca As Si S V

Embodiment 3

[0045] High impurity ferromolybdenum alloy powder (minus 200 mesh) 100g and slaked lime powder (Ca(OH) 2 ) 40g after mixing evenly, put it into a muffle furnace for oxidative roasting at 650°C for 2 hours, add water and stir the calcined sand obtained by calcification roasting, add sodium carbonate at 95°C for 45min at 2.5 times the theoretical amount of Mo and V leaching. Carbon-containing nickel-molybdenum ore calcification oxidation roasting - sodium carbonate leaching test results (%) are as follows:

[0046] Mo Fe Ni V P Si

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PUM

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Abstract

The invention provides a molybdenum-vanadium polymetallic metallurgy material alkaline decomposition method, the method is characterized in that: metallurgy materials are firstly added with lime for calcinations in order to avoid harmful gases such as SO2 produced in the baking process and mass impurities such as P, As and Si produced in the leaching process from entering the solution, and the baked sand obtained by calcinations can be added with a mixture of NaOH or Na2CO3 or NaOH and Na2CO3 and be leached out in water by agitation. The method has the advantages of low processing cost, high leaching rate of valuable metals and good working environment.

Description

technical field [0001] The invention relates to an alkali decomposition method for molybdenum-vanadium polymetallurgical materials. Background technique [0002] Vanadium-bearing stone coal ore, carbon-containing nickel-molybdenum ore, and high-impurity molybdenum-iron alloy obtained by smelting nickel-molybdenum ore are typical molybdenum-vanadium polymetallic metallurgical materials, and their common feature is that it is difficult to separate and smelt. [0003] Stone coal mines generally contain 0.8-1% vanadium, and also contain a small amount of valuable metals such as molybdenum and nickel. Commonly used methods for decomposing vanadium-containing stone coal mines include sodium roasting-water leaching, calcification roasting-acid leaching, empty roasting-acid leaching, direct acid leaching of stone coal mines and acid leaching of stone coal mines under oxygen pressure. The sodium roasting of stone coal causes serious environmental pollution due to the generation of h...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B1/02C22B3/12
CPCY02P10/20
Inventor 王明玉王学文张贵清肖连生李青刚曹佐英
Owner CENT SOUTH UNIV
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