What are some good suggestions for using peristaltic pumps in the acidification of minerals with sulfuric acid?
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In the metallurgical industry, it is planned to use peristaltic pumps in the acid treatment process of a certain ore – after mixing sulfuric acid with the minerals, the mixture is to be transported to the reaction equipment using peristaltic pumps. I wonder if this is feasible. The solid-to-liquid ratio is around 1:1 to 1:2, and the viscosity is quite high. What are some good recommendations regarding the selection of hoses? For material properties, please refer to the table below: Types include nitrile rubber, neoprene, fluororubber, polytetrafluoroethylene, and food-grade rubber. In terms of resistance to various chemicals, the values are as follows: Smoke-producing acids: *ao; Strong acids: ××△△; Concentrated sulfuric acid: ××△△; Concentrated *ao acids: ××△△; Concentrated salts: Acid resistance: ×△△△; Concentrated phosphoric acid: ×△△△; Concentrated acetic acid: ××××△; Concentrated hydrogen peroxide: Sodium hydroxide: ○○△△; Anhydrous ammonia: △△△△; Dilute *ao acids: ××○△; Dilute sulfuric acid: △△△△; Dilute salts: Acid resistance: ××△; Ammonia water: △△×○; Benzene: ××○○; Gasoline: ○○○○; Petroleum: △×○○; Carbon tetrachloride: ○○○; Ethanol: ○○○○; Propanol: ×△×○; Cresol: ×△△○; Acetaldehyde: ××△○; Ethylbenzene: ××△○; Butanol: ○○○○; Butadiene: ○×△○; Styrene: ××△○. The symbols indicate lifespan: ○—long lifespan, △—average lifespan, ×—not suitable for use. This table takes corrosion resistance into account only; since polytetrafluoroethylene has lower elasticity compared to rubber, the actual lifespan is influenced by factors such as operating pressure, pump stroke length, and the number of bends. Food-grade rubber is specifically designed for the food and beverage industry.
Unless domestic peristaltic pumps come with fluororubber hoses, foreign pumps may not have them. However, since your acid concentration is not high, EPDM pipes will suffice
This post was last edited by *nht1 on 2016-4-8 at 10:19. With a sulfuric acid concentration of 92.5%, reactions produce acidic substances such as hydrofluoric acid, silfluoric acid, and phosphoric acid. The reaction temperature ranges from 90 to 120°C, with the typical reaction temperature for the materials used being around 110°C.
That won’t work; the temperature is too high. Only fluorocarbon hoses can be considered, but hose pumps or peristaltic pumps are likely not suitable.
We previously tested screw pumps and pneumatic diaphragm pumps, but neither worked well. Sir, do you have any better suggestions?
Please, don’t be polite; I certainly don’t deserve such a title. Tell me the flow head, and I’ll check it out. Perhaps there is a special diaphragm pump that could be considered