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A method for selectively recovering antimony, arsenic and alkali from arsenic-alkali slag

An arsenic-alkali slag and selective technology, applied in chemical instruments and methods, alkali metal carbonates, alkali metal compounds, etc., can solve the problems of comprehensive recycling and utilization methods without arsenic-alkali slag, and achieve the benefits of production efficiency and purity. High and low cost effect

Active Publication Date: 2022-06-07
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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  • A method for selectively recovering antimony, arsenic and alkali from arsenic-alkali slag
  • A method for selectively recovering antimony, arsenic and alkali from arsenic-alkali slag
  • A method for selectively recovering antimony, arsenic and alkali from arsenic-alkali slag

Examples

Experimental program
Comparison scheme
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Embodiment 1

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

[0037] The composition of the secondary alkali arsenic residue in the embodiment 1 of table 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 according to the present invention, the process flow diagram of which 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...

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 the secondary alkali arsenic slag in the embodiment 2 of table 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 arse...

Embodiment 3

[0058] The raw materials of alkali arsenic slag treated in this example are the same as those in Example 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) The arsenic-alkali slag is ground with a ball mill, and then the slag with a particle size of 30-100 μm is sieved 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) Place the gravity tailings and calcium chloride in a molar ratio of 1:1.2 in a grinding crucible for mixing and grinding for 1 hour, place the ground mixed sample in a corundum crucible, and then put the corundum crucible into a tubular The calcification transformation was carried out in the atmosphere furnace, and the parameters were set as: heating time 180min, reaction temperature...

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Abstract

The invention discloses a method for selectively recovering antimony, arsenic and alkali from arsenic-alkali slag: (1) ball milling the arsenic-alkali slag to 30‑100 μm; Gravity separation of tailings and antimony residues; (3) mixing the gravity separation tailings with calcium salts and heating to obtain calcified inversion slag; (4) immersing the calcification inversion slag in water and separating liquid and solid to obtain water leaching Alkali and water leaching slag; (5) The water leaching slag is mixed with a carbon-based reducing agent, and the temperature is first raised to 600-800°C, and the condensed flue gas is collected to obtain a metal arsenic product, and then the temperature is raised to 900-1000°C to obtain the reduced slag, and collect the condensed flue gas to obtain crude antimony products. The treatment method of the present invention can process the arsenic-alkali slag produced by different antimony refining enterprises, realize the efficient separation of antimony, arsenic and alkali, the recovery rate of antimony and arsenic can reach more than 95%, basically all the alkali can be recycled, and the process is simple , easy to operate and conducive to the improvement of production efficiency.

Description

technical field [0001] The invention belongs to the comprehensive recovery and treatment technology of arsenic-alkali slag, in particular to a method for selectively recovering antimony, arsenic and alkali from arsenic-alkali slag by utilizing low-temperature calcification reduction transformation-cascade reduction precision control technology. Background technique [0002] my country is a big country in the storage, production and export of antimony. There are more than 200 antimony manufacturers, mainly 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. Usually, crude antimony is refined to remove arsenic by alkaline refining method, which will produce a large amount of arsenic-alkali slag. The average content of arsenic in the arsenic alkali residue 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 lar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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