Example of recovery of arsenic in tin tailings (Pinggui mining area)

The Pinggui Smelter Refinery Workshop is a selection plant that combines re-election, magnetic separation and flotation, with more complete mineral processing equipment and flexible mineral processing technology. With the depletion of Pinggui tin mining and mineral resources, selected works most of the time in a shutdown state, the production and economic benefits have been seriously affected. In order to fully exploit the mineral resources, comprehensive recovery of a variety of useful metals, full use of existing idle equipment, increase the economic efficiency of enterprises, selected works of cassiterite - sulphide ore tailings were featured multi-metal comprehensive recovery of production .
The tailings are a reverse-flotation process of the cassiterite-sulfurized ore fine concentrate, and the sulfide product floated by the yellow medicinal agent in the acid-containing ore slurry, which is accumulated for a long time, and the oxidation and agglomeration are more serious. Wherein the metal minerals are mainly cassiterite, arsenopyrite (arsenic pyrite), pyrrhotite, pyrite, sphalerite followed by a yellow and a small amount of copper ore Jamesonite lead ore, and gangue quartz sulfate Salt. The cassiterite is mainly in the form of continuum. It is closely related to gangue minerals and is mostly a granular aggregate. The cassiterite is mainly combined with arsenopyrite and sphalerite, and is associated with pyrite. The higher the grade of fine tin, the higher the arsenic content and the higher the sulfur content.
According to the experimental research, the tailings are comprehensively recovered by the principle of re-election-flotation-re-election, that is, firstly crushed and ground, and then enriched by spiral chute and shaker semi-tin and arsenic to obtain mixed concentrate. A large amount of tailings is discarded, and then flotation is carried out with sulfuric acid, butyl xanthate and pine oil, and arsenic concentrate is selected, and the tailings are floated and then shaken to obtain tin concentrate and tin rich ore. Production indicators are shown in Table 1.
Table 1 Production indicators. . (%)
product name
grade
Recovery rate
Raw ore grade
Arsenic concentrate
28
65.0
As14.82
Tin concentrate
34.5
35.20
Sn0.97
Xifu Middle Mine
2.6
15.60
Through production, tin concentrate with a tin grade of 34.5% and a recovery rate of 35.2% and a tin-rich ore with a tin content of 2.6% and a recovery of 15.6% and an arsenic grade of 28% and a recovery of 65% were obtained. Good indicators of arsenic concentrate have achieved the purpose of comprehensive utilization of mineral resources, increasing tin smelting raw materials, and achieved good economic and social benefits.

Corrosion resistant PTFE Tube

Corrosion resistant PTFE tube is a type of tube made from polytetrafluoroethylene (PTFE), a synthetic polymer that is known for its excellent chemical resistance and low friction properties. This type of tube is commonly used in applications where chemical resistance is required, such as in the chemical processing industry, oil and gas industry, and medical industry.
The unique properties of PTFE make it an ideal material for use in corrosive environments. PTFE is highly resistant to a wide range of chemicals, including acids, bases, and solvents. It also has a low coefficient of friction, making it an excellent choice for applications where low friction is required.
Corrosion resistant PTFE tube is typically manufactured using a process known as extrusion. During the extrusion process, a PTFE resin is heated and forced through a die to create the desired shape and size of the tube. The resulting tube is then cooled and cut to the desired length.
One of the key advantages of corrosion resistant PTFE tube is its ability to withstand high temperatures. PTFE has a melting point of around 327°C, which makes it suitable for use in high-temperature applications. It is also highly resistant to thermal shock, which means it can withstand rapid changes in temperature without cracking or breaking.
Another advantage of corrosion resistant PTFE tube is its non-stick properties. PTFE is a non-stick material, which means that it is easy to clean and does not attract dirt or other contaminants. This makes it an ideal material for use in applications where cleanliness is important, such as in the food and beverage industry.
Corrosion resistant PTFE tube is also highly flexible and can be easily bent and shaped to fit into tight spaces. This makes it an excellent choice for use in applications where space is limited, such as in medical devices or in industrial equipment.
In conclusion, corrosion resistant PTFE tube is a highly versatile and durable material that is ideal for use in a wide range of applications. Its excellent chemical resistance, low friction properties, and high-temperature resistance make it an ideal choice for use in corrosive environments. Whether you are working in the chemical processing industry, oil and gas industry, or medical industry, corrosion resistant PTFE tube is an excellent choice for your application.


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