Method for extracting lead and molybdenum from lead and molybdenum associated mineral

A technology for associated ore and galena, which is applied in the field of extracting lead and molybdenum, and can solve problems such as being unsuitable for processing low-grade ores or complex lead-molybdenum associated ore.

Inactive Publication Date: 2014-11-05
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Today, the traditional lead smelting process (sintering-smelting process, direct lead smelting process) and molybdenum smelting process (roasting-ammonia leaching process) are only for high-grade concentrates of single galena or molybdenite, and are not suitable for processing low-grade ore. Grade ore or complex lead-molybdenum associated ore

Method used

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  • Method for extracting lead and molybdenum from lead and molybdenum associated mineral
  • Method for extracting lead and molybdenum from lead and molybdenum associated mineral
  • Method for extracting lead and molybdenum from lead and molybdenum associated mineral

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025]

[0026] The extraction steps are as follows:

[0027] 1. Put the above-mentioned lead-molybdenum associated ore into a muffle furnace with a constant temperature of 600°C for oxidative roasting for 1 hour to obtain calcined sand containing 2.25% molybdenum, 25.41% lead, and 5.12% sulfur;

[0028] 2. Mix the calcined sand obtained in step 1 with a sodium hydroxide solution with a concentration of 30% by weight, and the weight ratio is calcined sand: NaOH=1: 1.2, place it in a reaction kettle, heat up to 130°C, and react Hours later, the slurry was filtered to obtain leachate and slag containing sodium plumbate and sodium molybdate. The concentrations of lead and molybdenum in the leaching solution are 85.82g / L and 6.63g / L respectively; the leaching residue contains 0.11% molybdenum and 0.87% lead. The leaching rates of lead and molybdenum are 98.3% and 97.5% respectively.

[0029] 3. Evaporate and concentrate the leaching solution obtained in step 2 to an alkali so...

Embodiment 2

[0031] The extraction steps are as follows:

[0032] 1. Put the above-mentioned lead-molybdenum associated ore into a muffle furnace at a constant temperature of 700°C for oxidative roasting for 0.5 hours to obtain calcined sand containing 2.04% molybdenum, 25.67% lead, and 12.69% sulfur;

[0033] 2. Mix the calcined sand obtained in step 1 with a sodium hydroxide solution with a concentration of 20% by weight, and the weight ratio is calcined sand: NaOH=1:0.6, place it in a reaction kettle, heat up to 110°C, and react Hours later, the slurry was filtered to obtain leachate and slag containing sodium plumbate and sodium molybdate. The concentrations of lead and molybdenum in the leaching solution are 100.10g / L and 8.39g / L respectively; the leaching residue contains 0.14% molybdenum and 6.42% lead. The leaching rates of lead and molybdenum are 85.29% and 95.99% respectively.

[0034] 3. Evaporate and concentrate the leaching solution obtained in step 2 to an alkali solution c...

Embodiment 3

[0036] The extraction steps are as follows:

[0037] 1. Put the above-mentioned lead-molybdenum associated ore into a muffle furnace at a constant temperature of 550°C for oxidative roasting for 2 hours to obtain calcined sand containing 2.16% molybdenum, 23.43% lead, and 5.92% sulfur;

[0038] 2. Mix the calcined sand obtained in step 1 with a sodium hydroxide solution with a concentration of 15% by weight, and the weight ratio is calcined sand: NaOH=1:1, place it in a reaction kettle, heat up to 150° C., and react 3 Hours later, the slurry was filtered to obtain leachate and slag containing sodium plumbate and sodium molybdate. The concentrations of lead and molybdenum in the leaching solution were 42.17g / L and 3.62g / L respectively; the leaching residue contained 0.11% molybdenum and 2.04% lead. The leaching rates of lead and molybdenum are 95.68% and 97.11% respectively.

[0039] 3. Evaporate and concentrate the leaching solution obtained in step 2 to an alkali solution c...

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Abstract

The invention discloses a method for extracting lead and molybdenum from lead and molybdenum associated mineral and especially relates to a method for extracting lead and molybdenum from lead and molybdenum associated mineral containing galena, molybdenite, lead molybdate ore and pyrite. The method comprises the following steps of carrying out roasting pre-treatment on lead and molybdenum associated mineral at a certain temperature to obtain a roasted product containing lead sulfate, lead molybdate, molybdenum trioxide and iron sesquioxide, immersing the roasted product in a sodium hydroxide solution to obtain a leachate containing sodium plumbite and sodium molybdate, carrying out evaporation concentration, cooling crystallization, washing and drying of the leachate to obtain lead oxide powder, and recovering molybdenum in the crystallization mother liquor by extraction separation or resin exchange. The method is used for high efficiency extraction separation of lead and molybdenum in lead and molybdenum associated mineral.

Description

technical field [0001] The invention relates to a method for extracting lead and molybdenum from lead-molybdenum associated ores, in particular to a method for extracting lead and molybdenum from lead-molybdenum associated ores of various minerals such as galena, molybdenite, lead molybdate, and pyrite The method belongs to the field of nonferrous metal smelting. technical background [0002] my country is rich in molybdenum ore resources. The total reserves of molybdenum are 8.4 million tons, ranking second in the world, but most of them are low-grade deposits. The average grade of low-grade deposits in mining areas is less than 0.1%, and their reserves account for 65% of the total reserves. Although the grade of molybdenum ore in my country is low, there are many beneficial components associated with it, and the economic value is high. Many of the molybdenum deposits contain high lead, and these molybdenum deposits produce molybdenum concentrates through flotation and pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/02C22B3/12C22B13/00C22B34/34
CPCY02P10/20
Inventor 张亦飞刘艳陈芳芳张懿
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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