2results about How to "Weak acid" patented technology

This invention provides a method and equipment for recovering lithium, fluorine, and aluminum from lithium-rich waste aluminum electrolyte, relating to the field of metal material recycling. The method for recovering lithium, fluorine, and aluminum from lithium-rich waste aluminum electrolyte includes the following steps: S1, the waste aluminum electrolyte is crushed, ground, sieved, and then dried for later use. The method provided by this invention utilizes ultrasonic-assisted leaching of lithium-containing waste aluminum electrolyte with organic acid (malonic acid). Compared with traditional inorganic acid leaching, organic acid has advantages such as good biodegradability, weak acidity, low corrosiveness, recyclability, and environmental friendliness. During neutralization, cryolite byproducts are obtained, which can be returned to the aluminum electrolysis cell for reuse, realizing the recycling of fluorine and aluminum. Finally, high-purity lithium phosphate is obtained through precipitation, effectively utilizing the lithium resources in the waste aluminum electrolyte.

This invention relates to the field of wear-resistant and corrosion-resistant centrifuge scrapers, specifically a wear-resistant and corrosion-resistant titanium-based composite centrifuge scraper and its preparation method. First, a vacuum consumable arc melting method is used to generate dispersed TiB whiskers and TiC particle reinforcing phases in situ within a Ti6Al4V alloy matrix, thereby improving the wear resistance of the titanium alloy. Then, the prepared ingot is centrifugally cast into a centrifuge scraper using a vacuum investment casting method. Addressing the problem of rapid wear caused by long-term scraping of salt slag layers on the scraper blade, this invention further utilizes laser cladding technology to form a gradient in-situ generated carbide layer on the blade surface, further improving the wear resistance of the centrifuge scraper. The centrifuge spiral scraper prepared by this method can meet the requirements for conveying high-halogen salts and corrosive solid-liquid two-phase substances and can be widely used in chlor-alkali, salt production, and coal chemical industries.