Two-stage calcining treatment method for electrolytic manganese ammonium sulfate slag

A technology of electrolytic manganese metal and calcination treatment, which is applied in the direction of non-metallic elements, chemical instruments and methods, sulfur compounds, etc., and can solve problems such as undetermined reaction conditions, huge economic pressure and environmental protection burden

Pending Publication Date: 2020-10-27
NINGXIA TIANYUAN MANGANESE LIMITED
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] (3) Extraction method: At present, the research on the separation of magnesium and manganese from the solution of double salt crystals by extraction method is still in its infancy, and the reaction conditions have not yet been determined.
[0009] (6) Stockpiling in slag warehouses: use slag warehouses for stockpiling, and this method will bring huge economic pressure and environmental protection burden to enterprises

Method used

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  • Two-stage calcining treatment method for electrolytic manganese ammonium sulfate slag
  • Two-stage calcining treatment method for electrolytic manganese ammonium sulfate slag
  • Two-stage calcining treatment method for electrolytic manganese ammonium sulfate slag

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Embodiment 1

[0034] A two-stage calcination treatment method for electrolytic metal manganese ammonium sulfate slag, comprising the following steps.

[0035] (1) One-stage calcination for sulfur fixation and deamination:

[0036] (a) Take the air-dried and pulverized ammonium sulfate slag, add it to the mixer together with the Ghanaian manganese ore powder after grinding, disperse and mix, and send it into the rotary calciner through the conveying equipment. The material flows from the kiln tail to the kiln head and The hot gas is in reverse contact, and the ammonium sulfate in the material is decomposed from 280°C to 550°C. The calcination time of the material in the kiln is 1h, the sulfur in the ammonium sulfate is fixed, and the water and NH in the ammonium sulfate are removed. 3 , and a small amount of SO 2 and CO 2 ;

[0037](b) Ammonium sulfate generates sulfuric acid and ammonia gas at a temperature of 550°C, and sulfuric acid reacts with manganese carbonate to form manganese sul...

Embodiment 2

[0044] (1) One-stage calcination: three groups of parallel samples are used for calcination, the mixing ratios of ammonium sulfate slag and manganese carbonate ore are 4:6 and 3:7 respectively, and the deamination rate, loss on ignition, and sulfur fixation rate are detected and analyzed after the experiment etc., and the data obtained are shown in Table 1.

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Abstract

The invention belongs to the technical field of chemical industry treatment, and relates to a two-stage calcination treatment method for electrolytic manganese ammonium sulfate slag. The method comprises the following steps: 1, carrying out first-stage calcination sulfur fixation and deamination: mixing ammonium sulfate slag with manganese ore powder, feeding the mixture into a rotary kiln at 550DEG C, and carrying out a reaction to generate a semi-finished product mainly containing manganese sulfate and magnesium sulfate and a mixed gas mainly containing ammonia gas and SO2; and 2, carryingout two-stage calcination desulfurization to prepare sulfuric acid: sending the semi-finished product into a rotary kiln with a temperature of 1200 DEG C, carrying out a reaction to generate solid slag mainly comprising magnesium oxide and magnesium dioxide, and SO2 gas, and preparing the SO2 gas into sulfuric acid. According to the method, dry calcination is adopted, and a two-stage calcination mode is adopted, so that the calcination efficiency is high, the generated gas, solid and the like can be recycled, the resource utilization rate is high, and the economic benefit is good.

Description

technical field [0001] The invention belongs to the technical field of chemical treatment, and relates to a two-stage calcination treatment method for electrolytic metal manganese ammonium sulfate slag. Background technique [0002] In the production process of electrolytic manganese, the compounding section mainly adopts acid-soluble form to dissolve the effective components in the manganese ore. After removing impurities, ammonia water is added to the filtrate to adjust the pH value of the electrolyte and generate ammonium sulfate at the same time. It forms manganese ammonium complex ions with manganese sulfate, which increases the conductivity of the electrolyte and acts as a buffer. As the temperature decreases, the saturation of the electrolyte will gradually increase during the static process, and crystals will gradually precipitate out, and the lower the temperature, the more crystals will be precipitated; after measurement, the crystals are ammonium manganese sulfate...

Claims

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Application Information

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IPC IPC(8): C01C1/02C01B17/50C01B17/74C22B47/00C22B26/22C22B1/02
CPCC01C1/028C01C1/022C01B17/501C01B17/74C22B47/00C22B26/22C22B1/02Y02P10/20
Inventor 贾天将宋正平马鹏飞张志华张国举
Owner NINGXIA TIANYUAN MANGANESE LIMITED
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