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Method for extracting manganese and silver from manganese ores

A technology of manganese ore and leaching method, which is applied in the field of metal chemical industry beneficiation, can solve the problems of unfinished industrial experiments and no application, etc., and achieve the effects of less energy consumption, less pollution and high heat utilization rate

Inactive Publication Date: 2014-07-09
刘楠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The above two processes are easy to implement in the laboratory, because of the stability of raw materials, tail gas treatment, unfinished industrial tests and other issues, they have not been applied in actual industrial production.

Method used

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  • Method for extracting manganese and silver from manganese ores

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: a kind of method that uses chlorination roasting-leaching method to extract manganese and silver from manganese ore, implementation steps are as follows:

[0037] (1) Dry and grind the manganese ore. Control the moisture content of the material after drying to less than 3%, and the particles passing through the 200-mesh sieve after grinding should be greater than 90%. The manganese ore is manganese oxide ore, containing 21.3% manganese and 109 g / t silver.

[0038] (2) The finely powdered manganese oxide ore is fully mixed with ammonium chloride, and the mixed material directly enters the roasting kiln. The weight ratio of manganese oxide ore to ammonium chloride is 1:0.4.

[0039] (3) The mixture of manganese oxide ore and ammonium chloride enters the roasting kiln, the roasting temperature is controlled at 425°C, and the roasting time is 30 minutes.

[0040] (4) Cloth bags are used to recover ammonium chloride from the tail gas in the kiln, and ammonia ...

Embodiment 2

[0048] Embodiment 2: a kind of method that uses chlorination roasting-leaching method to extract manganese and silver from manganese ore, implementation steps are as follows:

[0049] (1) Dry and grind the manganese ore. Control the moisture content of the material after drying to less than 3%, and the particles passing through the 200-mesh sieve after grinding should be greater than 90%. The manganese ore is complex polymetallic manganese ore, containing 18.9% manganese, 56 g / t silver, 3% copper, 0.5% nickel, 0.1% cobalt, 20% iron and 1% lead.

[0050] (2) The powdered manganese oxide ore is fully mixed with ammonium chloride, and the mixed material directly enters the roasting kiln. The weight ratio of manganese oxide ore and ammonium chloride is 1:0.5.

[0051] (3) The mixed material of manganese oxide ore and ammonium chloride enters the roasting kiln, the roasting temperature is controlled at 675°C, and the roasting time is 60 minutes.

[0052] (4) Cloth bags are used t...

Embodiment 3

[0060] Embodiment 3: a kind of method that uses chlorination roasting-leaching method to extract manganese and silver from manganese ore, implementation steps are as follows:

[0061] (1) Dry and grind the manganese ore. Control the moisture content of the material after drying to less than 3%, and the particles passing through the 200-mesh sieve after grinding should be greater than 90%. The manganese ore is manganese-rich slag, containing 34.1% manganese and 38 g / t silver.

[0062] (2) The finely powdered manganese oxide ore is fully mixed with ammonium chloride, and the mixed material directly enters the roasting kiln. The weight ratio of manganese oxide ore and ammonium chloride is 1:1.

[0063] (3) The mixed material of manganese oxide ore and ammonium chloride enters the roasting kiln, the roasting temperature is controlled at 740°C, and the roasting time is 80 minutes.

[0064] (4) Cloth bags are used to recover ammonium chloride from the tail gas in the kiln, and amm...

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Abstract

The invention discloses a method for extracting manganese and silver from manganese ores, which can be used for extracting manganese and silver from manganese ores by a chloridizing roasting-leaching process. The method comprises the following steps: drying the manganese ores, milling, mixing with ammonium chloride, roasting in a closed kiln, leaching the roasted product with systemic circulating water, regulating the pH value of the leach solution with ammonia water recovered from kiln tail gas, recovering silver and other metals with manganese powder, precipitating manganese with ammonium bicarbonate to recover the manganese, and recovering ammonium chloride from the raffinate for reutilization. The manganese recovery rate is up to higher than 93%, the silver recovery rate is up to higher than 84%, and further separation can be easily implemented. The technical process does not emit waste water or waste gas, conforms to the environmental requirements, and has obvious economic and social benefits.

Description

technical field [0001] The invention belongs to the field of metal chemical industry beneficiation, and in particular relates to a method for extracting manganese and silver from manganese ore by using a chlorination roasting-leaching method. Background technique [0002] Most of my country's manganese ore resources are medium and low-quality pyrolusite. The existing process for processing low-grade pyrolusite is mainly divided into reduction roasting, wet reduction and so on. The reduction roasting process has disadvantages such as unstable raw materials, high energy consumption, large pollution, and inability to separate metals such as silver; most wet reduction processes have complicated processes, high production costs, or strong corrosive materials, and metals such as silver cannot be separated, polluting the environment and other shortcomings. [0003] Chlorination roasting is a roasting process in which the target components in mineral raw materials are transformed ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/08C22B3/04C22B3/46C22B11/00C22B47/00
CPCY02P10/20
Inventor 刘楠
Owner 刘楠