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Comprehensive utilization method of pyrometallurgical manganese ore slag

A manganese slag and solution technology, which is applied in the field of comprehensive utilization solutions for pyrometallurgical manganese slag, can solve the problems of manganese element waste, environmental pollution, polluted water environment, etc.

Active Publication Date: 2014-01-29
BEIJING SUN SILVER SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as a common manganese metal smelting and extraction process, pyrometallurgy will produce a large amount of solid slag, and due to the residual manganese and other heavy metal elements in the slag, it cannot be directly used for building materials or agricultural purposes, and the accumulation of a large amount of slag is easy. It will cause waste of residual manganese, and also cause environmental pollution; a large amount of soluble salt contained in slag will seep into the soil with rainwater, causing deterioration of the soil environment in the environment; ammonium ions rich in soluble salt will pollute the water environment and cause water pollution. Ammonia nitrogen exceeding the standard

Method used

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  • Comprehensive utilization method of pyrometallurgical manganese ore slag

Examples

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Effect test

Embodiment example 1

[0032] Adopt the technical process described in the present invention to process pyrometallurgy manganese slag, the manganese slag treatment capacity is about 100,000 tons / year, the project reclaims manganese amount about 3200 tons / year, and reclaims ammonium sulfate 2500 tons / year, the project's The process conditions are:

[0033] In the washing section:

[0034] The weight of manganese slag and process water is 1:1;

[0035] Washing water temperature is 15°C o

[0036] In the evaporation and concentration section:

[0037] The evaporation ratio of the washing filtrate obtained after solid-liquid separation is 60%.

[0038] In the ammonia washing section:

[0039] Ammonia mass concentration is 5%;

[0040] The weight of ammonia water and filter cake is 1:1;

[0041] The ammonia washing temperature is 10°C.

[0042] In the deamination section:

[0043] The ammonia nitrogen content in the process water after deamination is 4-6mg / L;

[0044] The ammonia in the deammoni...

Embodiment example 2

[0046] Adopt the technical process described in the present invention to process pyrometallurgy manganese slag, the processing capacity of manganese slag is about 150,000 tons / year, the project reclaims manganese amount about 5000 tons / year, and reclaims ammonium sulfate 3800 tons / year, the project's The process conditions are:

[0047] In the washing section:

[0048] The weight of manganese slag and process water is 1:8;

[0049] The washing water temperature is 80°C.

[0050] In the evaporation and concentration section:

[0051] This example of the washing filtrate evaporation that obtains after solid-liquid separation is 95%.

[0052] In the ammonia washing section:

[0053] Ammonia mass concentration is 15%;

[0054] The weight of ammonia water and filter cake is 8:1;

[0055] The ammonia washing temperature is 80°C.

[0056] In the deamination section:

[0057] The ammonia nitrogen content in the process water after deamination is 8-10mg / L;

[0058] The ammonia...

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Abstract

The invention provides a resource recovery as well as environment-friendly solution of manganese ore slag, and mainly provides an engineering method for treating, recycling as well as reutilizing pyrometallurgical manganese ore slag. The comprehensive utilization method aims at recycling residual manganese elements in the ore slag as much as possible, and removing heavy metals in the ore slag, so that the treated ore slag can reach three-level soil requirements specified in the national standard GB15618-1995, and therefore, the ore slag can be conveniently reutilized in agriculture as well as building material industry, and the like.

Description

technical field [0001] The invention relates to a comprehensive utilization solution for pyrometallurgy manganese slag, which belongs to the fields of environmental protection and chemical industry. Background technique [0002] As one of the most important steel products in my country, manganese steel has been widely used in various industrial fields. However, as a common manganese metal smelting and extraction process, pyrometallurgy will produce a large amount of solid slag, and due to the residual manganese and other heavy metal elements in the slag, it cannot be directly used for building materials or agricultural purposes, and the accumulation of a large amount of slag is easy. It will cause waste of residual manganese, and also cause environmental pollution; a large amount of soluble salt contained in slag will seep into the soil with rainwater, causing deterioration of the soil environment in the environment; ammonium ions rich in soluble salt will pollute the water ...

Claims

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Application Information

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IPC IPC(8): C25C1/10
Inventor 宋云华刘欣陈建铭魏玉胜李璐
Owner BEIJING SUN SILVER SCI & TECH
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