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Method for recovering antimony, arsenic and alkali selectively from arsenic alkali residue

An arsenic-alkali slag, selective technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal carbonates, etc., can solve the problems of comprehensive recycling methods without arsenic-alkali slag

Active Publication Date: 2020-06-26
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no effective and low-cost comprehensive recycling method for arsenic-alkali slag

Method used

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  • Method for recovering antimony, arsenic and alkali selectively from arsenic alkali residue
  • Method for recovering antimony, arsenic and alkali selectively from arsenic alkali residue
  • Method for recovering antimony, arsenic and alkali selectively from arsenic alkali residue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In this embodiment, the secondary alkali arsenic slag is used as the raw material, and its composition is shown in Table 1.

[0037] The composition of secondary alkali arsenic slag in table 1 embodiment 1

[0038] element O F Na Mg Al Si P S Cl Element(%) 26.80 0.15 24.45 0.316 1.81 3.34 0.59 3.205 0.586 element K Ca sc Ti Cr mn Fe Cu Zn Element(%) 0.303 1.32 0.079 0.137 0.0419 0.0176 1.665 0.008 0.173 element As Se Rb Sr Zr In Sb Pb other Element(%) 4.185 0.2155 0.002 0.0076 0.0059 0.013 7.36 0.036 23.1835

[0039] A method for selectively recovering antimony, arsenic and alkali from arsenic-alkali slag of the present invention, its process flow chart is as follows figure 1 shown, including the following steps:

[0040] (1) Grinding the arsenic-alkali slag with a ball mill, and then sieving the arsenic-alkali slag with a particle size of 30-100 μm through a vib...

Embodiment 2

[0047] In this embodiment, secondary alkali arsenic slag is used as raw material, and its composition is shown in Table 2.

[0048] The composition of secondary alkali arsenic slag in table 2 embodiment 2

[0049] element O F Na Mg Al Si P S Cl Element(%) 24.32 0.21 27.78 0.423 1.56 2.7 0.34 2.956 0.378 element K Ca sc Ti Cr mn Fe Cu Zn Element(%) 0.563 1.87 0.0365 0.125 0.0369 0.0132 1.789 0.0056 0.23 element As Se Rb Sr Zr In Sb Pb other Element(%) 6.987 0.334 0.005 0.0065 0.0036 0.032 9.86 0.024 17.4117

[0050] A method for selectively recovering antimony, arsenic and alkali from arsenic-alkali slag of the present invention comprises the following steps:

[0051] (1) Grinding the arsenic-alkali slag with a ball mill, and then sieving the arsenic-alkali slag with a particle size of 30-100 μm through a vibrating screen;

[0052] (2) Get 30g of alkali arsenic slag af...

Embodiment 3

[0058] The alkali arsenic slag raw material treated in this embodiment is the same as that in Embodiment 1.

[0059] A method for selectively recovering antimony, arsenic and alkali from arsenic-alkali slag of the present invention comprises the following steps:

[0060] (1) Grinding the arsenic-alkali slag with a ball mill, and then sieving the slag with a particle size of 30-100 μm through a vibrating screen;

[0061] (2) Get 30g of alkali arsenic slag after step (1), utilize gravity separator to carry out gravity separation, obtain gravity separation tailings and antimony slag;

[0062] (3) Put gravity separation tailings and calcium chloride in a molar ratio of 1:1.2 and mix and grind in a grinding crucible for 1 hour, put the ground mixed sample in a corundum crucible, and then put the corundum crucible into a tubular The calcification transformation is carried out in the atmosphere furnace, and the setting parameters are: heating time 180min, reaction temperature 900°C,...

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Abstract

The invention discloses a method for recovering antimony, arsenic and alkali selectively from arsenic alkali residue. The method comprises the steps that (1) the arsenic alkali residue is subjected toball-milling until the specification is 30-100 [mu]m; (2) gravity separation is performed on the arsenic alkali residue subjected to ball-milling, and gravity separation tailings and antimony residueare obtained; (3) the gravity separation tailings and calcium salt are mixed and heated to obtain calcified transformation residue; (4) the calcified transformation residue is subjected to water leaching to achieve solid-liquid separation, and water leaching alkali liquor and water leaching residue are obtained; and (5) the water leaching residue and a carbon-based reductive agent are mixed and heated to 600-800 DEG C, condensate gas is collected to obtain a metal arsenic product, then a mixture is heated to 900-1000 DEG C, reductive residue is obtained, and condensate gas is collected to obtain a crude antimony product. The processing method provided by the invention can be used for processing arsenic alkali residue produced by different antimony smelting enterprises, efficient separating of antimony, arsenic and alkali is achieved, the antimony and arsenic recovery rates can reach up above 95%, almost all alkali can be recycled, the process is simple and convenient to operate, and the production efficiency can be improved easily.

Description

technical field [0001] The invention belongs to the comprehensive recovery and treatment technology of arsenic-alkali slag, and in particular relates to a method for selectively recovering antimony, arsenic and alkali from arsenic-alkali slag by using low-temperature calcification reduction transformation-step reduction precision control technology. Background technique [0002] my country is a big storage, production and export country of antimony. There are more than 200 antimony manufacturers, mainly distributed in Hunan, Guangxi, Yunnan and other places. The output of antimony products is about 100,000 tons, accounting for more than 80% of the world's total. Alkaline refining is usually used to refine crude antimony to remove arsenic, which will produce a large amount of arsenic-alkali slag. The average content of arsenic in arsenic-alkali slag is 1% to 15%, and it exists in the form of soluble sodium arsenate, which is highly toxic. In addition, it is also rich in a larg...

Claims

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Application Information

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IPC IPC(8): C22B30/02C22B30/04C22B7/00C22B1/00C22B5/10C01D7/00
CPCC22B30/02C22B30/04C22B7/006C22B1/005C22B5/10C01D7/00Y02P10/20
Inventor 田磊徐志峰严康金复忠金承永吴选高
Owner JIANGXI UNIV OF SCI & TECH
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