A kind of recycling method of fumei slag

A technology of fumei slag and slag, which is applied in the improvement of process efficiency, organic chemistry, etc., to achieve the effect of increasing economic benefits

Active Publication Date: 2022-06-14
LANZHOU UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of these processes focus on the recycling of non-ferrous metals, such as obtaining non-ferrous metals by direct calcination, or using acid to dissolve and destroy organic matter, and then separate and recycle to obtain non-ferrous metals. Recycling is rarely reported

Method used

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  • A kind of recycling method of fumei slag
  • A kind of recycling method of fumei slag
  • A kind of recycling method of fumei slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In the present embodiment, the chemical composition analysis (unit: %) of Fumei slag sees the following table:

[0032]

[0033] For the Fumei slag whose chemical composition and content are shown in the above table, the following procedures are carried out. figure 1 Processing shown:

[0034] (1) Take 31.70 g of fume slag (the fome root contained is 15 g in terms of sodium fomelic acid dihydrate), beat with 100 mL of water, add 30.00 g of sodium sulfide nonahydrate, react at 85° C. for 2 hours, and filter. The filtrate is distilled under reduced pressure to dryness to obtain 7.1 g of sodium formate dihydrate, and the yield of organic matter formate is 47.3%, which can be reused in the purification and decobalt removal process of electrolytically producing metallic zinc. The filtered solid slag is processed in the following step (2).

[0035] (2) The solid residue was first leached with 150 mL of 100 g / L sulfuric acid to obtain a solution containing zinc, and the y...

Embodiment 2

[0038] In this embodiment, the Fumei slag is the Fumei slag in Example 1, that is, its chemical composition content is the same as that in Example 1.

[0039] The Fumei slag is carried out as follows figure 2 Processing shown:

[0040] (1) Take 31.70 g of fume slag (the fome root contained is 15 g in terms of sodium fomelic dihydrate), beat with 300 mL of water, add 24.00 g of sodium sulfide nonahydrate, react at 70° C. for 2 hours, and filter. The filtrate is distilled to dryness under reduced pressure to obtain 6.9 g of sodium formate dihydrate, and the yield of organic compound formate is 46%, which can be reused in the purification and removal of cobalt in the electrolytic production of metallic zinc. The filtered solid slag is processed in the following step (2).

[0041] (2) The solid slag was first beaten with 30mL water, and then 13.00g MnO 2 and 25mL of 6.00mol / L sulfuric acid at 70°C for 6 hours under normal pressure oxidative leaching to obtain a solution contai...

Embodiment 3

[0044] In this embodiment, the Fumei slag is the Fumei slag in Example 1, that is, its chemical composition content is the same as that in Example 1.

[0045] The treatment method of this Fumei slag is basically the same as Example 2, and the difference is:

[0046] In the step (1), the reaction temperature was 10° C. and the reaction time was 5 hours, to obtain 6.1 g of sodium formate dihydrate, and the yield of the organic compound formate was 40.67%.

[0047] In step (2), the solid slag used 35.00g Na 2 S 2 O 8 and 40.00 mL of 6.00 mol / L concentrated sulfuric acid at 70 °C for 6 h under normal pressure oxidative leaching to obtain a solution containing zinc and cadmium. The yields of zinc and cadmium are 89.1% and 88.7%, respectively.

[0048] In the step (3), the undissolved residue was subjected to suction filtration at 130° C. to obtain 1.6 g of sulfur. The residual slag was calcined in a muffle furnace at 600°C for 2 hours to obtain 0.91 g of cobalt tetroxide as a s...

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Abstract

The invention provides a method for recycling phomei residue. The liquid-solid phase reaction between sulfide precipitation conversion agent and thiram slag not only makes the precipitation of thiram metal salt with relatively small stability constant into the corresponding metal sulfide precipitation, which is easy for subsequent separation, but also converts the corresponding thiram root into water-soluble thiram The organic components of thiram root can be recycled and reused in a green and efficient manner, effectively avoiding the harm caused by the organic matter to the environment. In the present invention, the solid slag obtained by solid-liquid separation after the reaction is preferably pickled to recover the contained metals, especially the high value-added cobalt, so as to realize the separation and recycling of various non-ferrous metals in the phylum slag.

Description

technical field [0001] The invention belongs to the field of solid waste treatment, and in particular relates to a method for recycling Fumei slag. Background technique [0002] In the hydrometallurgical process, in order to improve the deficiencies of the existing impurity removal process, a new impurity removal method is proposed: organic N,N dimethyldithiocarbamate (Fomei salt) impurity removal method. [0003] For example, in the production process of electrolytic manganese, the use of sodium formate to remove heavy metal ions such as Co, Ni, and Cu has the advantages of good impurity removal effect and easy separation of precipitation. [0004] In addition, in the zinc hydrometallurgy process, as zinc enters the leaching solution in the form of zinc sulfate, other impurities such as Cu, Cd, Co, Ni and other elements also enter the solution. If the content of these impurities is too high, it will have a great impact on the electro-zinc process and quality. For this rea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C333/16C22B7/04C22B23/00C22B17/00C22B19/30C22B19/20
CPCC07C333/16C22B7/04C22B7/007C22B23/043C22B23/0438C22B17/04C22B19/30C22B19/22Y02P10/20
Inventor 张海军潘从明杨瑛
Owner LANZHOU UNIVERSITY
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