Treatment method of electrolytic manganese residues

A treatment method and technology for electrolytic manganese slag, applied in chemical instruments and methods, improvement of process efficiency, removal of solid waste, etc., can solve the problems of complex raw materials, secondary pollution, high cost, reduce ammonia nitrogen content, and reduce raw materials. , the effect of low cost

Pending Publication Date: 2022-08-05
CHONGQING ZONJO RENEWABLE RESOURCES DEV CO LTD +5
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The raw materials required by this method are complicated, the cost is high, and it is easy to cause secondary pollution

Method used

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  • Treatment method of electrolytic manganese residues

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Experimental program
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Effect test

Embodiment 1

[0047] 100 parts by weight of electrolytic manganese slag and 10 parts by weight of calcium oxide are uniformly stirred and then placed in a muffle furnace crucible for calcination; then cooled and crushed with the furnace to obtain processed manganese slag.

[0048] The calcination process conditions are as follows: heating up to 300°C at a heating rate of 10°C / min, and calcining at 300°C for 30min; heating up to 600°C at a heating rate of 10°C / min, and calcining at 600°C for 60min; The temperature was raised to 900 °C at a heating rate of min, and calcined at 900 °C for 60 min; the temperature was raised to 1500 °C at a heating rate of 5 °C / min, and calcined at 1500 °C for 180 min.

[0049] The manganese ion content and ammonia nitrogen content in the obtained manganese slag after treatment are shown in Table 1.

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Abstract

The invention discloses a treatment method of electrolytic manganese residues. The treatment method comprises the following steps that raw materials composed of electrolytic manganese residues and alkaline substances are calcined at the first calcination temperature, the second calcination temperature, the third calcination temperature and the fourth calcination temperature in sequence and then cooled, and treated manganese residues are obtained; wherein the alkaline substance is selected from one or more of calcium oxide, sodium oxide, calcium carbonate, sodium carbonate, calcium hydroxide and sodium hydroxide; based on 100 parts by weight of the electrolytic manganese residues, the dosage of the alkaline substance is 5-20 parts by weight. According to the treatment method, the ammonia nitrogen content and the manganese ion content in the electrolytic manganese residues can be effectively reduced.

Description

technical field [0001] The invention relates to a method for treating electrolytic manganese slag. Background technique [0002] Electrolytic manganese will produce a large amount of electrolytic manganese slag, which contains a large amount of metal manganese ions and ammonium ions. During the long-term stacking process, metal manganese ions and ammonium ions will migrate to soil and groundwater, causing environmental pollution. At present, the methods of treating electrolytic manganese slag include using electrolytic manganese slag to make manganese fertilizer or extracting heavy metals from electrolytic manganese slag. However, the production of manganese fertilizer from electrolytic manganese slag is only at the stage of theoretical research, and the economic cost of extracting heavy metals from electrolytic manganese slag is relatively high. [0003] CN103601378B discloses a preparation method of sodium oxide modified high vitreous phase manganese slag. The raw materi...

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Application Information

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IPC IPC(8): B09B3/70B09B3/40
CPCB09B3/70B09B3/40Y02P10/20
Inventor 陈先勇何兆益陈克凡乔宏霞王志美陈俊赤曹蔚琦田浩谢磊冯琼张仁立张军骆中涛杨帅袁秀香
Owner CHONGQING ZONJO RENEWABLE RESOURCES DEV CO LTD
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