Method for leaching and measuring molybdenum metal in nickel-molybdenum ore

A nickel-molybdenum ore, leaching technology, applied in the field of nickel-molybdenum ore processing and determination of molybdenum content, can solve the problems of molybdenum concentrate grade and recovery rate, etc., achieve good sample processing and detection methods, less reagent consumption, Strong digestion effect

Inactive Publication Date: 2014-06-25
HENAN INST OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The grade and recovery rate of molybdenum concentrate in beneficiation are affected

Method used

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  • Method for leaching and measuring molybdenum metal in nickel-molybdenum ore
  • Method for leaching and measuring molybdenum metal in nickel-molybdenum ore
  • Method for leaching and measuring molybdenum metal in nickel-molybdenum ore

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Experimental program
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Effect test

Embodiment

[0017] (1) Dissolution of the sample

[0018] Molybdenum is stable in air or water at room temperature. The experimental results show that molybdenum can resist the corrosion of dilute sulfuric acid, hydrochloric acid, hydrofluoric acid and phosphoric acid. However, when the temperature reaches 400°C, slight oxidation begins to occur, and when the temperature reaches 600°C, severe oxidation occurs to form molybdenum trioxide. This experiment adopts the orthogonal design method, takes sodium hydroxide as leaching agent, selects roasting time (A), roasting temperature (B), three factors of sodium hydroxide concentration (C), adopt L 9 (4 3 ) orthogonal design, three factors and three levels of experiments were carried out to optimize the extraction conditions of molybdenum content in nickel-molybdenum ore. The factors and levels are shown in Table 1.

[0019] Table 1L 9 (4 3 ) Orthogonal Design

[0020]

[0021] From the range analysis of the table, it can be seen that ...

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Abstract

The invention discloses a method for leaching and measuring molybdenum metal in a nickel-molybdenum ore. The nickel-molybdenum ore is treated by a roasting-alkaline leaching method, and a three-factor and three-level test is executed by an L9(43) orthogonal design, so that extraction conditions for the molybdenum content of the nickel-molybdenum ore are optimized; leaching liquid under optimal conditions is centrifugally filtered and then is diluted and quantified; the content of molybdenum is measured by an atomic emission spectrometer; a result shows that the following factors which affect the extraction rate of the molybdenum content of the nickel-molybdenum ore mainly comprise the concentration of sodium hydroxide, the roasting time and the roasting temperature in sequence; under the optimal conditions of leaching molybdenum through sodium hydroxide, the roasting time is 2.5h, the roasting temperature is 500 DEG C, and the concentration of sodium hydroxide is 40 percent. Under the same atomic emission spectroscopy optimized conditions, a marking recycling experiment is performed on a sample. The recycling rate of elements measured by the method is 97.2-102.3 percent, so that the method is high in accuracy. The relative standard deflection is 0.92-1.24 percent, so that the method is high in precision. Therefore, the method can be used for reliably analyzing the molybdenum content of the nickel-molybdenum ore.

Description

technical field [0001] The invention relates to a method for processing nickel-molybdenum ore and measuring molybdenum content. Background technique [0002] Molybdenum is an important rare metal with high melting point and good temperature resistance. Molybdenum is mainly used in the steel industry. Molybdenum oxides and sulfides are used for catalysts, and lubricant molybdates are used for corrosion inhibition materials. The material has broad development prospects in the fields of coating, pigment industry and optoelectronics. [0003] Nickel-molybdenum ore is a kind of polymetallic composite ore with complex composition, containing a variety of metal and non-metal elements, mainly in the form of carbon sulfur molybdenum ore, but due to its complex composition and relatively low grade, the traditional Physical and chemical beneficiation techniques are difficult to effectively enrich the useful components. [0004] The recovery rate of molybdenum is low due to poor proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/63G01N1/44
Inventor 杨理杨雪峰马金友张建伟王青苏晓肖香珍
Owner HENAN INST OF SCI & TECH
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