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Comprehensive Utilization Method of Molybdenum in Waste Molybdenum

A waste acid liquid and molybdenum dioxide technology, which is applied in the fields of molybdenum compounds, chemical instruments and methods, inorganic chemistry, etc., can solve the problems that are not conducive to emission reduction and environmental protection, slow oxidation process, high production cost, etc., and achieve short chemical reaction time , high molybdenum yield and short processing time

Inactive Publication Date: 2017-02-22
高立新
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the roasting and oxidation process of the coal is slow, the coal consumption is large, and a large amount of carbon dioxide is emitted.
The production cost is high, and the loss of molybdenum is large, which is not conducive to emission reduction and environmental protection

Method used

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  • Comprehensive Utilization Method of Molybdenum in Waste Molybdenum

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] see figure 1 , the comprehensive utilization method of molybdenum in waste molybdenum, comprises the steps:

[0026] S1. Pretreatment of waste molybdenum: initial oxidation and crushing of molybdenum mud, polishing in the molybdenum circle is carried out in the state of water mill, after decanting the water in the mud collection bucket, the molybdenum mud will gradually oxidize when it encounters air into molybdenum dioxide, then dry it in the air, and crush it into a particle size of 20 mesh, which should not be too fine, otherwise the reaction will be too strong and difficult to control.

[0027] S2. Adjusting the concentration of the molybdenum waste acid solution refers to the determination and adjustment of the concentration of nitric acid in the molybdenum waste acid solution. Calculated by the weight of the added molybdenum mud, the weight of nitric acid is 10%-20% more than the weight of molybdenum mud. Refers to nitric acid with a concentration of 3mol / L;

[...

Embodiment 2

[0033] A method for comprehensive utilization of molybdenum in waste molybdenum, comprising the steps of:

[0034] S1. Pretreatment of waste molybdenum: initial oxidation and crushing of molybdenum mud, polishing in the molybdenum circle is carried out in the state of water mill, after decanting the water in the mud collection bucket, the molybdenum mud will gradually oxidize when it encounters air into molybdenum dioxide, then dry it in the air, and crush it into a particle size of 15 mesh, which should not be too fine, otherwise the reaction will be too strong and difficult to control.

[0035] S2. Adjusting the concentration of the molybdenum waste acid solution refers to the determination and adjustment of the concentration of nitric acid in the molybdenum waste acid solution. Calculated based on the weight of the added molybdenum mud, the weight of nitric acid is 10% more than the weight of molybdenum mud. Nitric acid refers to the concentration 3mol / L nitric acid;

[00...

Embodiment 3

[0041] A method for comprehensive utilization of molybdenum in waste molybdenum, comprising the steps of:

[0042] S1. Pretreatment of waste molybdenum: initial oxidation and crushing of molybdenum mud, polishing in the molybdenum circle is carried out in the state of water mill, after decanting the water in the mud collection bucket, the molybdenum mud will gradually oxidize when it encounters air into molybdenum dioxide, then dry it in the air, and crush it into a particle size of 17 mesh, which should not be too fine, otherwise the reaction will be too strong and difficult to control.

[0043] S2. Adjusting the concentration of the molybdenum waste acid solution refers to the determination and adjustment of the concentration of nitric acid in the molybdenum waste acid solution. Calculated by the weight of the added molybdenum mud, the weight of nitric acid is 15% more than the weight of the molybdenum mud. Nitric acid refers to the concentration 3mol / L nitric acid;

[0044...

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Abstract

The invention relates to a comprehensive utilization method of molybdenum in waste molybdenum. The comprehensive utilization method comprises the following steps of: (S1) preprocessing the waste molybdenum; (S2) adjusting concentration of molybdenum acid pickle; (S3) adding the molybdenum acid pickle of which the concentration is adjusted into molybdenum mud, stirring for reacting in an enamel or stainless steel reaction vessel for 2 hours under the conditions that the initial temperature is 40-50 DEG C, the pressure is normal pressure and the stirring speed is 110 revolution / minute; (S4) regulating the pH to 1 by utilizing ammonium hydroxide so as to prepare molybdic acid; and (S5) filtering and separating the molybdic acid by utilizing a centrifugal machine or a compressor. By recycling and producing molybdenum products by utilizing the comprehensive utilization method, high economic benefit and remarkable social benefit are obtained.

Description

technical field [0001] The invention relates to a comprehensive utilization method of molybdenum in waste molybdenum (molybdenum waste acid solution and molybdenum mud). Background technique [0002] At present, in my country's relevant electric light source industries, such as enterprises producing energy-saving filaments, a large amount of molybdenum-containing waste liquid is produced during the production process of energy-saving filaments, and the molybdenum content of the waste liquid ranges from 40-80 grams per liter. The content of nitric acid is 3-5mol / L, and the acidity is strong. The treatment of the liquid was discarded at first, and then the waste molybdenum was made into molybdenum acid by ammonia neutralization, and then processed into molybdenum products such as ammonium molybdate and sodium molybdate for use. The legal disadvantage of ammonia is that ammonia consumption is large, more than two tons of ammonia are needed to produce one ton of ammonium molybda...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G39/00
Inventor 高立新
Owner 高立新
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