A method for comprehensive recovery of valuable metals from smelting ferromanganese by removing dust and waste slag
A technology for valuable metals and ferromanganese, which is applied in the field of preparing potassium hydroxide and manganese sulfate, can solve the problems of increased maintenance of sintering equipment, poor dust removal and mud sintering performance, etc., and achieves low cost, high economic value and high product quality. high purity effect
Active Publication Date: 2018-02-16
五矿湖铁(内蒙古)铁合金有限责任公司
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[0034] The dust removal ash / carbon-manganese slag used is a kind of waste from the electric furnace smelting ferromanganese, which still contains high Mn, and is rich in K and Zn (three times that of ordinary manganese ore). It is difficult to use the traditional manganese sulfate production process meet product requirements. For example, the chemical analysis results of the dust removal ash used are shown in Table 1, and the X-ray semi-quantitative analysis results are shown in Table 2.
[0035] Table 1 Chemical analysis results of electric furnace dedusting ash
[0036]
[0037] Table 2 X-ray semi-quantitative analysis results of dust removal dust in electric furnace (%)
[0038] K
Ca
Mg
Al
Si
S
Cl
mn
Zn
Fe
P
Pb
14.64
1.979
1.24
0.792
1.126
0.709
0.709
23.082
9.116
1.454
0.026
1.753
[0039] 1. Preparation of potassium hydroxide:
[0040] The technological process is as follows:...
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Abstract
The invention discloses a method for comprehensive recovery of valuable metal from ferromanganese melting fly ash and waste residues. The method comprises the steps that fly ash and / or carbon manganese residues generated in the electric furnace ferromanganese melting process are washed, a washing solution is subjected to concentration crystallization, and a potassium hydroxide product is obtained; washing residues are leached by sulfuric acid, an oxidizing agent is added into a leaching agent, pH is adjusted, and sedimentations Fe3+ and Al3+ are obtained; a weight removal agent is added, pH is adjusted, standing is performed, sedimentations Zn2+ and Zn4+ are obtained, and zinc residues are recycled; a post-solution of the sedimentations Zn2+ and Zn4+ is subjected to refined filtration, concentration crystallization and drying in sequence to obtain a manganese sulfate product. According to the method, byproducts electric furnace fly ash and carbon manganese residues in the electric furnace ferromanganese melting process are sufficiently utilized for recycling various valuable metal, particularly, the high-purity manganese sulfate and potassium hydroxide with the high value are obtained, and resources are comprehensively utilized.
Description
technical field [0001] The invention relates to a method for recycling and utilizing smelting ferromanganese dedusting ash and waste residue, in particular to a method for preparing potassium hydroxide and manganese sulfate by using smelting ferromanganese dedusting ash and waste slag raw materials, belonging to the technical field of comprehensive treatment of industrial waste. Background technique [0002] In recent years, with the continuous improvement of environmental protection measures such as electric furnace sealing and dust removal technology, the effective reuse of dust removal has been put on the agenda. [0003] The channels for generating dust and manganese slag from electric furnace are as follows: [0004] ① Production of by-products of high-carbon ferromanganese by electric furnace: use the flux method to continuously add qualified manganese ore, lime and coke into the 30MVA or 16.5MVA fully enclosed submerged arc furnace through electronic scales, and rely ...
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IPC IPC(8): C01D1/42C01D1/04C01G45/10
CPCC01D1/04C01D1/42C01G45/10C01P2006/80
Inventor 崔先云李际权袁国华祝建华陈烨
Owner 五矿湖铁(内蒙古)铁合金有限责任公司