Method for extracting molybdenum by roasting high impurity sodium carbonate nickel-ferro-molybdenum

A ferroalloy and sodium carbonate technology, applied in the direction of improving process efficiency, can solve the problems of large consumption of sodium carbonate reagent, loss of Mo, V, and high production cost, and achieve good roasting effect, low production cost and fast reaction speed. Effect

Inactive Publication Date: 2009-03-18
CENT SOUTH UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

High-impurity nickel-molybdenum-iron alloys are only added with sodium carbonate as a roasting additive. Not only the consumption of sodium carbonate reagent is large, the production cost is high, but also the concentration of impurities such as P, As, and Si in the calcination leach solution is high, and the amount of slag produced by solution purification is large. Severe loss of V

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  • Method for extracting molybdenum by roasting high impurity sodium carbonate nickel-ferro-molybdenum
  • Method for extracting molybdenum by roasting high impurity sodium carbonate nickel-ferro-molybdenum
  • Method for extracting molybdenum by roasting high impurity sodium carbonate nickel-ferro-molybdenum

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Experimental program
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Effect test

Embodiment 1

[0026] Add 35g Na to 100g high-impurity nickel-molybdenum-iron alloy powder 2 CO 3 (1.6 times the stoichiometric sum of the roasting reactions of Mo and V) and 25g CaO (1.1 times the stoichiometric sum of the roasting reactions of P, As and Si) were mixed and ground to -150 mesh, and roasted at 550°C for 4 hours. Liquid ratio 1:4, add water and stir, then add Na2CO 3 Adjust the pH of the solution to 11, stir and leach for 2 hours at 80°C, and then filter. The experimental result (%) of high impurity nickel-molybdenum-iron alloy sodium carbonate roasting is as follows:

[0027] Mo P As Si V Ni Fe molybdenum ferroalloy 18.23 5.48 0.301 4.03 1.52 8.17 51.23 Leach residue 0.281 3.89 0.214 2.87 0.311 5.83 36.58 Leaching rate 97.84 --- --- --- 71.36 --- ---

Embodiment 2

[0029] Add 28g Na to 100g high-impurity nickel-molybdenum-iron alloy powder 2 CO 3 , 15g CaO and 10g Ca(OH) 2 Mix and grind to -150 mesh, roast at 650°C for 3 hours, add water to the calcined sand at a solid-to-liquid ratio of 1:3 and stir, then add NaOH to adjust the pH of the solution to 12, stir and leach at 70°C for 2.5 hours, and then filter. The experimental result (%) of high impurity nickel-molybdenum-iron alloy sodium carbonate roasting is as follows:

[0030] Mo P As Si V Ni Fe molybdenum ferroalloy 18.23 5.48 0.301 4.03 1.52 8.17 51.23 Leach residue 0.265 3.81 0.210 2.85 0.245 5.82 36.60 Leaching rate 97.96 --- --- --- 77.43 --- ---

Embodiment 3

[0032] Add 25g Na to 100g high-impurity nickel-molybdenum-iron alloy 2 CO 3 and 30g Ca(OH) 2 Mix and grind to -180 mesh, roast at 700°C for 2 hours, add water and stir the calcined sand at a solid-to-liquid ratio of 1:2, add lime milk to adjust the pH of the solution to 13, stir and leach at 60°C for 4 hours, and then filter. The experimental result (%) of high impurity nickel-molybdenum-iron alloy sodium carbonate roasting is as follows:

[0033] Mo P As Si V Ni Fe molybdenum ferroalloy 16.25 7.41 1.27 2.24 1.41 10.03 53.78 Leach residue 0.236 5.44 0.932 1.65 0.173 7.38 39.53 Leaching rate 98.02 --- --- --- 82.81 --- ---

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Abstract

The invention relates to a method for extracting molybdenum by roasting nickel-molybdenum iron alloy sodium carbonate with high impurities. The process comprising three main steps of preparation, roasting and leaching is as follows: firstly adding sodium carbonate and lime into nickel-molybdenum iron alloy powder with high impurities to evenly mix and mill to roast the sodium carbonate and the lime; and leaching calcine obtained from roasting in a dilute alkali solution into molybdenum and vanadium. The method has the advantages of a small amount of sodium carbonate, high extraction rate of molybdenum and vanadium, low production cost and environment protection and so on.

Description

technical field [0001] The invention relates to a method for extracting molybdenum by roasting high-impurity nickel-molybdenum-iron alloy sodium carbonate. Background technique [0002] High-impurity nickel-molybdenum-iron alloy is an enrichment of valuable metals such as iron, nickel, molybdenum, and vanadium obtained by oxidation and roasting of carbon-containing nickel-molybdenum ore and then reduction smelting. In addition to Ni, Mo, Fe, V, the high-impurity nickel-molybdenum-iron alloy also contains impurity elements such as P, As, and Si. The existing process of roasting high-impurity nickel-molybdenum-iron alloy sodium carbonate is that sodium carbonate and high-impurity nickel-molybdenum-iron alloy are mixed and ground and then roasted, and the amount of sodium carbonate added is 50-70% of the mass of the high-impurity nickel-molybdenum-iron alloy. High-impurity nickel-molybdenum-iron alloys are only added with sodium carbonate as a roasting additive. Not only the c...

Claims

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Application Information

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IPC IPC(8): C22B34/34C22B34/22C22B3/12
CPCY02P10/20
Inventor 王学文王明玉施丽华
Owner CENT SOUTH UNIV
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