Method for preparing industrial molybdenum trioxide by roasting ammonia leaching residue

A technology of molybdenum trioxide and ammonia leaching slag, which is applied in the direction of improving process efficiency, etc., can solve the problems of high consumption of raw and auxiliary materials, poor economic benefits, and high labor intensity, so as to reduce equipment material requirements and reduce the cost of recycling molybdenum , Improve the effect of metal recovery rate

Inactive Publication Date: 2011-11-23
JINDUICHENG MOLYBDENUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new technology makes it easier than previous methods by making certain steps simpler or eliminating unnecessary materials like iron oxides from recovered metallic molybonate during production processes. It also saves on costs compared to existing techniques while still maintaining high efficiency rates.

Problems solved by technology

This patented technical solution described in this patents relates to recovering metals from spent nitride ores that have been dissolved during manufacturing process steps such as smelting operations. However, current techniques involve complicated and expensive treatments with environmental concerns due to their potential negative impact upon public health issues like water quality deterioration caused by excessive amounts of harmful substances released through these treatment routes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The ammonia leaching slag with molybdenum mass percentage content of 7% and molybdenum concentrate with molybdenum mass percentage content of 57% are mixed evenly according to the mass ratio of 1:4, then the mixture is placed in the rotary kiln, and the roasting temperature is Calcined at 450°C for 8 hours to obtain industrial molybdenum trioxide.

[0015] After testing (there is an error in actual detection), the mass percentage of Mo in the industrial molybdenum trioxide prepared by the present embodiment is 44.8%, the mass percentage of P is 0.016%, and the mass percentage of S is 0.037%, which meets Requirements for the production of ammonium molybdate, ferromolybdenum and other products.

Embodiment 2

[0017] The ammonia leaching slag that is 21% by mass of molybdenum and the molybdenum concentrate that is 57% by mass of molybdenum are mixed evenly according to the mass ratio of 1:4, then the mixture is placed in a rotary kiln, and the roasting temperature is Calcined at 500°C for 7 hours to obtain industrial molybdenum trioxide.

[0018] After testing (there is an error in actual detection), the mass percentage of Mo in the industrial molybdenum trioxide prepared by the present embodiment is 46.5%, the mass percentage of P is 0.02%, and the mass percentage of S is 0.05%, which meets Requirements for the production of ammonium molybdate, ferromolybdenum and other products.

Embodiment 3

[0020] The ammonia leaching slag that is 14% by mass of molybdenum and the molybdenum concentrate that is 57% by mass of molybdenum are mixed evenly according to the mass ratio of 1:5, then the mixture is placed in a rotary kiln, and the roasting temperature is Calcined at 680°C for 5 hours to obtain industrial molybdenum trioxide.

[0021] After testing (there is an error in actual detection), the mass percentage of Mo in the industrial molybdenum trioxide prepared by the present embodiment is 45.3%, the mass percentage of P is 0.012%, and the mass percentage of S is 0.04%, which meets Requirements for the production of ammonium molybdate, ferromolybdenum and other products.

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Abstract

The invention discloses a method for preparing industrial molybdenum trioxide by roasting ammonia leaching residue, which comprises the following steps: evenly mixing ammonia leaching residue and molybdenum concentrate in a mass ratio of 1:(4-6), putting the mixture in a rotary kiln, and roasting at 450-680 DEG C for 5-8 hours to obtain the industrial molybdenum trioxide. The preparation method disclosed by the invention is simple, shortens the metallic molybdenum technological process in recycling ammonia leaching residue, lowers the requirement for equipment material and the cost for recycling molybdenum, and increases the metal recovery rate of the ammonia leaching residue. The industrial molybdenum trioxide prepared by the method disclosed by the invention satisfies the requirements for producing ammonium molybdate, ferromolybdenum and other products.

Description

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Claims

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Application Information

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Owner JINDUICHENG MOLYBDENUM CO LTD
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