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Process for preparing sodium pyroantimonate from arsenic- and stibium-containing smoke ash

A technology of sodium pyroantimonate and soot, which is applied in the field of hydrometallurgy to achieve the effects of low investment, simple equipment requirements, and easy industrialization

Active Publication Date: 2011-04-27
CHENZHOU CITY JINGUI SILVER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is: to develop a process for preparing sodium pyroantimonate with arsenic-containing antimony soot, by treating the soot, separate and recover As and Sb in the soot, comprehensively recover valuable elements, and prepare high value-added Sodium pyroantimonate products reduce the amount of soot returned to smelting, and solve the secondary pollution to the environment with high economic efficiency of production

Method used

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  • Process for preparing sodium pyroantimonate from arsenic- and stibium-containing smoke ash
  • Process for preparing sodium pyroantimonate from arsenic- and stibium-containing smoke ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Take 200g of soot, containing As: 9.4%, Sb: 33.8%, Pb: 22.3%. During the pretreatment for arsenic removal, the solid-to-liquid ratio is 1:5, the NaOH concentration is 80g / L, and the NaOH concentration is 80g / L. 2 CO 3 The concentration is 20g / L, the temperature is 85-90°C, and the reaction time is 2 hours to control the reaction conditions. The treatment effects of As leaching rate of 95.42%, Pb leaching rate of 6.36%, and Sb leaching rate of 4.87% are achieved. When arsenic is precipitated by sodium sulfide in the leaching solution, the temperature is 70°C, the amount of sodium sulfide added is 1.5 times the mass of arsenic in the solution, the precipitation rate of arsenic is 89.73%, and the content of As in arsenic sulfide is 51.82%. When the leaching slag is pretreated by sulfide leaching, the solid-to-liquid ratio is 1:8, and Na 2 The concentration of S is 120g / L, the concentration of NaOH is 20g / L, the temperature is 95°C, and the reaction time is 3 hours. The...

Embodiment 2

[0034] 200g of soot in this example contains As: 6.08%, Sb: 35.46%, and Pb: 21.39%. When pretreatment to remove arsenic, according to solid-liquid ratio 1:4, NaOH concentration 100g / L, NaOH 2 CO 3 Concentration of 10g / L, temperature of 90-95°C, and reaction time of 4 hours control the reaction conditions. The treatment effects of As leaching rate of 98.35%, Pb leaching rate of 7.12%, and Sb leaching rate of 5.25% are achieved. When sodium sulfide in the leaching solution precipitates arsenic, the temperature is 60°C, the amount of sodium sulfide added is twice the mass of arsenic in the solution, the arsenic precipitation rate is 93.74%, and the arsenic sulfide contains As: 48.68%. When alkali sulfide leaching pre-treats the leached slag, the solid-to-liquid ratio is 1:10, the Na2S concentration is 110g / L, the NaOH concentration is 10g / L, the temperature is 90°C, and the reaction time is 4 hours. The antimony leaching rate is 96.18%, and the lead slag rate is 99.43%. When ...

Embodiment 3

[0036] Take 200g of soot, containing As: 9%, Sb: 35.2%, Pb: 21.2%. When pretreatment to remove arsenic, according to solid-liquid ratio 1:3; NaOH concentration 40g / L, NaOH 2 CO 3Concentration of 40g / L, temperature of 80-90°C and reaction time of 0.5 hours control the reaction conditions. The treatment effects of As leaching rate of 95.42%, Pb leaching rate of 6.36%, and Sb leaching rate of 4.87% are achieved. When arsenic is precipitated by sodium sulfide in the leaching solution, the temperature is 50°C, the amount of sodium sulfide added is twice the mass of arsenic in the solution, the precipitation rate of arsenic is 89.73%, and the content of As in arsenic sulfide is 51.82%. When the leaching slag is pretreated by sulfide leaching, the solid-to-liquid ratio is 1:4, and Na 2 The concentration of S is 80g / L, the concentration of NaOH is 50g / L, the temperature is 80°C, and the reaction time is 2 hours. The antimony leaching rate is 95.37%, and the lead slag rate is 99.65...

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Abstract

The invention discloses a process for preparing sodium pyroantimonate from arsenic- and stibium-containing smoke ash and belongs to the field of wet-process metallurgy. The production process for preparing the sodium pyroantimonate is characterized by comprising the following steps of: using NaOH and Na2CO3 or mixing the NaOH and Na2CO3, and performing wet-process pretreatment to remove arsenic; precipitating arsenic in arsenic-containing leaching liquor by using Na2S to obtain an arsenic sulfide byproduct; leaching arsenic- and stibium-containing leaching residues by mixing the Na2S and NaOH, returning lead residue, smelting, and recovering lead, silver and other valuable metals; blowing oxygen-rich compressed air into stibium-containing leaching liquor to prepare a sodium pyroantimonateproduct; and concentrating and crystallizing oxidized liquor to prepare Na2S2O3. The process has the advantages of no environmental pollution, simple equipment, low investment, high comprehensive utilization rate, low cost, suitability for industrial production, and the like.

Description

technical field [0001] The invention relates to a process for preparing sodium pyroantimonate with arsenic-containing antimony soot, belonging to the field of hydrometallurgy. technical background [0002] At present, most of the rare and precious metal products such as silver and bismuth produced by most precious metal smelting enterprises in my country are recovered from copper and lead anode slime. When our company recovers silver from lead anode slime, a large amount of soot containing arsenic and antimony is produced in the process of converter blowing, and contains a certain amount of valuable metals such as lead and silver. Among them, Sb: 30%-40%, As: 5%-10%, Pb: 20%-25%, Ag: 1%-2%; As and Sb mainly exist in oxidized form. If it cannot be used effectively, it will not only affect the production efficiency, but also easily cause secondary pollution to the environment, and the low utilization rate of valuable metals will affect the company's economic benefits. The tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/02C22B3/04C22B30/04C22B11/00C22B13/00C22B30/02
CPCY02P10/20
Inventor 谢兆凤张圣南季勇马辉曹永贵曹永德
Owner CHENZHOU CITY JINGUI SILVER IND CO LTD
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