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An extraction method and antimony metal technology, applied in the field of antimony metal extraction, can solve the problems of poor environmental protection, low recovery rate and high energy consumption, and achieve the effects of solving poor environmental protection, improving recovery rate and improving melting strength
Active Publication Date: 2018-08-28
CHINA ENFI ENGINEERING CORPORATION +1
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[0004] The main purpose of the present invention is to provide a method for extracting antimony metal to solve the problems of poor environmental protection, high energy consumption and low recovery rate in the existing antimony smelting process
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Embodiment 1
[0063] First, by analyzing the antimony-containing materials that enter the furnace, according to the preferred smelting slag type, mix in iron ore and limestone target slag type, 60wt% SiO 2 , 10wt% FeO, 15wt% CaO target slag type.
[0064] Secondly, the above-mentioned materials to be treated are volatilized and smelted in an electric heating volatilization device (the first electric furnace), so that the Sb 2 S 3 is transformed into Sb 2 o 3 , get antimony oxide flue gas and volatile slag (type is FeO-SiO 2 -CaO, composed of 60wt% SiO 2 , 10wt% FeO, 15wt% CaO, and the rest are impurities), and the volatilization melting temperature is 1250°C.
[0065] The above-mentioned antimony oxide flue gas is gathered in the waste heat recovery device, and after cooling to 800°C, it enters the dust collection device to obtain antimony oxide dust (powder Sb 2 o 3 ). After finishing, the residual antimony content in the volatilized slag is only 0.12wt%.
[0066] Antimony oxide d...
Embodiment 2
[0068] First, by analyzing the antimony-containing materials that enter the furnace, according to the preferred smelting slag type, mix in iron ore and limestone target slag type, 60wt% SiO 2 , 10wt% FeO, 10wt% CaO target slag type.
[0069] Secondly, the above-mentioned materials to be treated are volatilized and smelted in an electric heating volatilization device (the first electric furnace), so that the Sb 2 S 3 is transformed into Sb 2 o 3 , to obtain antimony oxide flue gas and volatile slag, and the temperature of volatile smelting is 1250°C.
[0070] The above-mentioned antimony oxide flue gas is gathered in the waste heat recovery device, and after being cooled to 800°C, it enters the dust collection device to obtain antimony oxide dust (powder Sb 2 o 3 ). At the same time, oxygen-enriched blowing (oxygen blowing) is carried out on the above-mentioned volatile slag. After the end, the residual antimony content in the volatile slag is only 0.18wt%.
[0071] Anti...
Embodiment 3
[0073] The difference from Example 1 is: the volatilization melting temperature is 1350°C
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Abstract
The invention provides a method for extracting an antimony metal. A device adopted by the method for extracting the antimony metal comprises an electrothermal volatilization device, a first dust collection device and an electrothermal reduction device which are connected in sequence. The method comprises the following steps: performing volatilization smelting on an antimony-containing material inthe electrothermal volatilization device so as to obtain an antimony-containing flue gas, wherein the antimony-containing material comprises antimony sulfide; collecting the antimony-containing flue gas from the first dust collection device so as to obtain antimony oxide dust; performing reduction smelting on the antimony oxide dust in the electrothermal reduction device, so as to obtain the antimony metal. The antimony-containing material is subjected to volatilization smelting through electric heating, and the whole volatilization smelting process needs no air blown combustion fuel, so thatthe flue gas quantity can be greatly reduced, and the concentration of SO2 in the flue gas can be increased. High electric heating efficiency can be achieved, not only is the amount of a fluxing agentreduced, but also residues can be reduced, and comprehensive benefits of environment protection, energy conservation, recycling rate increase, and the like, can be achieved. Due to electrothermal reduction, the heat efficiency can be greatly improved, the energy consumption can be reduced, the smelting intensity can be greatly improved, and the number of reduction devices can be greatly reduced.
Description
technical field [0001] The invention relates to the field of metal smelting, in particular to a method for extracting antimony metal. Background technique [0002] Antimony smelting is divided into fire method and wet method. At present, antimony metallurgical production is dominated by pyrometallurgical processes, accounting for more than 90%. At present, the basic process of most antimony smelters in this field is antimony concentrate blast furnace volatilization smelting-crude antimony trioxide reverberatory furnace reduction smelting. [0003] The antimony blast furnace volatilization smelting process has poor environmental protection, high energy consumption, large flue gas volume, and SO in flue gas 2 The content is low, it is difficult to make acid and other disadvantages. At the same time, blast furnace waste slag contains high antimony, resulting in waste of resources. Blast furnaces cannot process low-grade antimony concentrates. The reverberatory furnace redu...
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