The invention relates to a method for removing arsenic from smoke containing arsenic and solidifying arsenic. The method comprises the following steps that production of comprehensive recovering of valuable metal such as arsenic, antimony, lead and bismuth from smelting smoke containing arsenic, antimony and lead is conducted, and arsenic accumulation in a system is reduced to enable arsenic to be harmless. According to the method provided by the invention, through normal-pressure alkaline leaching, soluble arsenic in the smoke is removed, after trivalent arsenic in a leaching agent is changed to pentavalent arsenic through catalytic oxidation, a stable solid arsenic mineral is compounded through a lime arsenic precipitation method, and then the solid arsenic mineral is solidified through a cement solidifying mode; and leaching slag is subjected to the processes such as washing, reduction smelting and oxidizing blowing, and then all valuable elements are recycled to the maximum. According to the method, by removing arsenic from smoke and leaving antimony, lead, bismuth and the like in the arsenic removed slag as far as possible, separation of arsenic and the valuable metal and harmlessness can be achieved; the comprehensive using rate of the resources is high, the application range of raw materials is wide, the pollution problem in the extracting process of a traditional technique is solved, and particularly dust generated in the lead-zinc smelting process is avoided, and the advantage of the method is more obvious.

Method for removing arsenic from smoke containing arsenic and solidifying arsenic

The invention relates to a method for carrying out bath smelting concentration on valuable metals in arsenic-containing refractory gold ore. The method comprises the following steps of mixing and blending arsenic-containing refractory gold ore, a copper-containing material and a solvent to obtain a mixture, adding the mixture into high-temperature slag having a certain composition and carrying out oxidation smelting by introducing oxygen so as to produce gold-containing low-grade copper matte by controlling the end point of the oxidation smelting, after arsenic and sulfur are oxidized, enabling the oxidized arsenic and sulfur to enter flue gas, cooling the flue gas, collecting dust to produce As2O3 smoke dust and purifying the SO2-containing flue gas subjected to dust collection for preparation of sulfuric acid. By the method, gold and other non-ferrous metals are effectively concentrated so as to facilitate recovery in the subsequent processes and the recovery rate of gold in low-grade copper matte is above 98%; the main raw material for smelting is refractory concentrate, gold is concentrated from the low-grade copper matte in which the content of copper is less than 10%, a large amount of copper concentrate does not need to be mixed and the mass ratio of copper to gold is small; since the content of copper in smelting slag is small, the copper lost with the slag is also little.

Method for carrying out bath smelting concentration on valuable metals in arsenic-containing refractory gold ore

The invention relates to a comprehensive utilization method of arsenic-containing materials. According to the method, production of comprehensive recovery of valuable metals such as arsenic, antimony, lead, bismuth and the like from smelting dust containing the arsenic, the antimony and the lead is performed, accumulation of the arsenic in the system is reduced, and harmless treatment is performed on the arsenic. With the method, through normal pressure alkaline leaching, soluble arsenic in the dust is removed, leaching residues are subjected to procedures of washing, reduction smelting, oxidizing blowing and the like, and various valuable elements are recycled. With the method, the arsenic is removed from the dust and enters a leaching solution, and impurities such as antimony, lead, tin and the like are separated out in the form of precipitates through purification and impurity removal of the leaching solution. A purified solution is used for arsenic salt purification of a zinc sulfate solution during zinc hydrometallurgy, and purification residues are sent for lead smelting, so that separation and harmless treatment of the arsenic and the valuable metals are realized. According to the method, the comprehensive utilization rate of resources is high, the raw material application range is wide, the problem of pollution in the extraction process of the traditional technology is solved, and the method has the more obvious advantages for the dust produced in the lead and zinc smelting process particularly.

Comprehensive utilization method of arsenic-containing materials

The invention discloses a method for metallic arsenic production directly through reducing sulfur-fixed roasting of arsenic precipitating slag. The arsenic precipitating slag produced in the process of lead refinery through the fire assaying method serves as a raw material, lead oxide and a reducing agent are added, reducing sulfur-fixed roasting is conducted at the temperature of 300-700 DEG C after ingredients are mixed, roasted products are subjected to vacuum separation at the temperature of 700-1000 DEG C, and thus metallic arsenic is directly obtained; and distillation slag is subjected to sorting of reselection and flotation to obtain multi-metal powder and lead sulfide concentrates correspondingly, and valuable metal is recovered and returns to the smelting working procedure. According to the method for metallic arsenic production directly through reducing sulfur-fixed roasting of the arsenic precipitating slag, efficient harmless utilization of the arsenic precipitating slag containing lead can be achieved, high-value products of arsenic are directly produced, the process is short, energy consumption is low, the process is clean, and the direct recovery rate of the metallic arsenic reaches up to 96.32%; and meanwhile, recovery of the valuable metal existing in the arsenic precipitating slag is completed, the lead oxide is recovered in a high-quality lead sulfide concentrate mode finally, the resource utilization rate is high, and comprehensive recovery is good.

Method for metallic arsenic production directly through reducing sulfur-fixed roasting of arsenic precipitating slag

The invention relates to a method for arsenic removal of arsenic-containing dust and comprehensive recycling of valuable elements. According to the method, production of comprehensive recovery of valuable metals such as arsenic, antimony, lead, bismuth and the like from smelting dust containing the arsenic, the antimony and the lead is performed, accumulation of the arsenic in the system is reduced, and harmless treatment is performed on the arsenic. With the method, through normal pressure alkaline leaching, soluble arsenic in the dust is removed, after trivalent arsenic in a leaching solution becomes pentavalent arsenic through catalytic oxidation, stable arsenic-fixing minerals are synthesized with the method for arsenic precipitation with lime and the precipitation transforming method and are solidified through piling, leaching residues are subjected to procedures of washing, reduction smelting, oxidizing blowing and the like, and the various valuable elements are recycled to the maximum extent. With the method, the arsenic is removed from the dust, the antimony, the lead, the bismuth and the like are left in the arsenic-removed residues as much as possible, and separation and harmless treatment of the arsenic and the valuable metals can be realized. According to the method, the comprehensive utilization rate of resources is high, the raw material application range is wide, the problem of pollution in the extraction process of the traditional technology is solved, and the method has the more obvious advantages for the dust produced in the lead and zinc smelting process particularly.

Method for arsenic removal of arsenic-containing dust and comprehensive recycling of valuable elements

The invention discloses a treatment method for a polymetallic alloy formed by arsenic-lead-antimony and noble metal. In order that the polymetallic alloy formed by arsenic-lead-antimony and noble metal is directly prepared to meet the international standard Sb20399.8, the noble metal is enriched in the noble metal alloy. The treatment method comprises the following steps of: carrying out alkalification and deep dearsenification treatment on the polymetallic alloy formed by arsenic-lead-antimony and noble metal; then converting antimony white at low temperature in a special converting furnace; and finally blasting and highly oxidizing lead slagging to obtain the noble metal alloy. According to the treatment method, the antimony directly satisfies the output requirement of antimony white; the energy consumption is low, and the direct yield rate of the noble metal is improved to more than 98%; and the converting and slagging time of residual alloy after removal of arsenic and antimony is shortened within 30 hours, which is reduced by more than 50% compared with the conventional process.

Treatment method for polymetallic alloy formed by arsenic-lead-antimony and noble metal

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Treatment method for polymetallic alloy formed by arsenic-lead-antimony and noble metal