Smelting system and method of stibnite

A technology for stibnite and vacuum smelting, applied in the direction of improving process efficiency, improving energy efficiency, etc., can solve the problems of low recovery rate of antimony metal and high cost

Active Publication Date: 2020-04-28
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a smelting system and smelting method of stibnite, so as to solve the problems of low antimony metal recovery rate and high cost in the existing stibnite smelting method

Method used

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  • Smelting system and method of stibnite
  • Smelting system and method of stibnite

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preparation example Construction

[0050] In a preferred embodiment, the above preparation method further includes: adding a binder during the vacuum melting process. The addition of the binder is beneficial to improve the cohesive force of the stibnite, the reducing fuel and the basic additive, and further helps to improve the precise ratio of the raw materials in the reaction process. More preferably, the adhesives include, but are not limited to, pellet adhesives, silicone epoxy adhesives, UV curable adhesives, hot melt adhesives, pressure sensitive adhesives, polyurethane adhesives, waste molasses, and epoxy adhesives. one or more of the agents.

[0051] In a preferred embodiment, the binder is used in an amount of 0.2-15% based on the weight percentage of the stibnite. The amount of the binder includes but is not limited to the above-mentioned range, and limiting it within the above-mentioned range is beneficial to further improving the binding force of the stibnite, the reducing agent and the basic addit...

Embodiment 1

[0068] The amount of stibnite added is 2t, the amount of carbon powder added is 0.12t, and the amount of soda ash added is 1.4t. Mix the above raw materials evenly, and then add 0.1t of waste sucrose water to the mixture. After stirring evenly, pelletize Granulate in the machine to obtain pellets with a diameter of 0.5 cm. Afterwards, the produced pellets are put into a vacuum smelting device 10 (electric furnace) for vacuum smelting. The pressure in the furnace is 50Pa, the smelting temperature is 600°C, and the smelting time is 5 hours; the antimony-containing pellets are smelted in a vacuum furnace, and the antimony-containing pellets are put into the melting furnace 90 (electric furnace) for melting in a hot state. The material is heated to 1200°C and kept for 2 hours to produce crude antimony and slag. The results show that the yield of crude antimony is 0.96t, and the crude antimony contains 99.2% antimony.

Embodiment 2

[0070] The addition amount of stibnite is 3t, the addition amount of carbon powder is 0.18t, and the addition amount of soda ash is 2.1t. The above raw materials are mixed evenly, and then 0.15t waste sucrose water is added to the mixture. (disc pelletizer) to obtain pellets with a diameter of 0.5 cm. Afterwards, the produced pellets are put into a vacuum smelting device 10 (electric furnace) for the first vacuum smelting. The pressure in the furnace is 50Pa, the smelting temperature is 600°C, and the smelting time is 6 hours; the antimony-containing pellets are obtained by smelting in a vacuum furnace, and the antimony-containing pellets are put into the melting furnace 90 (electric heating furnace) in a hot state for melting , the furnace is heated to 1200 ° C, after 2 hours of heat preservation, the output of crude antimony and slag. The results show that the output of crude antimony is 1.51t, and the crude antimony contains 99.1% of antimony.

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Abstract

The invention provides a smelting system and method of stibnite. The melting system comprises a vacuum smelting device, a smelting furnace, a pressure control device and a refining device, the vacuumsmelting device and the smelting furnace are correspondingly selected from an electric heating device or an electromagnetic induction heating device, the pressure of the vacuum smelting device is 1-100 Pa, and a feeding opening and an antimony-containing product outlet are formed in the vacuum smelting device; and the smelting furnace pressure is atmospheric pressure, an antimony-containing product inlet, a crude antimony outlet and a slag discharging opening are formed in the smelting furnace, the antimony-containing product inlet communicates with the antimony-containing product outlet, thetemperature in the smelting furnace is higher than that in the vacuum smelting device, the pressure control device is used for controlling the vacuum degree in the vacuum smelting device and the smelting furnace, a crude antimony inlet and a metal antimony outlet are formed in the refining device, and the crude antimony inlet communicates with the crude antimony outlet. According to the smelting system of the stibnite, by adopting the above vacuum alkaline smelting system, the recovery rate of the metal antimony can not only be greatly improved, the technological process is simplified, the recovery cost is reduced, the environmental pollution and waste of sulfur elements can be further reduced, and the environmental protection property is improved.

Description

technical field [0001] The invention relates to the field of stibnite smelting, in particular to a smelting system and method for stibnite. Background technique [0002] The main phase in stibnite is antimony sulfide (Sb 2 S 3 ), the treatment process of stibnite is divided into pyrometallurgical process and wet process. At present, pyrometallurgical process has an absolute advantage, and more than 95% of stibnite adopts pyrometallurgical process to smelt metal antimony. The typical technological process of pyrometallurgy of stibnite is: blast furnace volatilization smelting-reverberatory furnace reduction; Furnace reduction produces crude antimony. [0003] Although the "blast furnace-reverberatory furnace" process is mature, it still has the following disadvantages: (1) Most of the sulfur in the stibnite is converted into SO in the blast furnace 2 Into the flue gas, but the concentration in the flue gas is low, the generated flue gas cannot produce acid, and the cost o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B30/02C22B1/244C22B5/10
CPCC22B30/02C22B1/2406C22B1/244C22B5/10Y02P10/25
Inventor 马登陈学刚裴忠冶王书晓郭亚光
Owner CHINA ENFI ENGINEERING CORPORATION
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