2results about How to "Change nature" patented technology

The application discloses a method and system for comprehensively utilizing high-magnesium nickel sulfide ore by a low-temperature oxygen-rich method. The method comprises the following steps: obtaining pre-leaching residue by pre-leaching and magnesium removal with high-magnesium nickel sulfide ore as raw material; obtaining activated ore slurry by mechanically activating the pre-leaching residue; and obtaining a nickel-containing leaching solution by low-temperature oxygen-rich leaching of the activated ore slurry. The application has wide application range, is simple and reliable, easy to control, and low in investment cost, and can convert metals into corresponding products, so that high-magnesium nickel sulfide concentrate can be treated at low cost and high efficiency.

The invention relates to a laser cladding ceramic phase composite reinforced iron-based high-entropy alloy coating as well as a preparation method and application thereof. The laser cladding ceramic phase composite reinforced iron-based high-entropy alloy coating comprises high-entropy powder and WC powder, the mass of the WC powder accounts for 1 wt.%-40 wt.% of the mass of the high-entropy powder; the high-entropy powder comprises Fe metal powder, Co metal powder, Cr metal powder, Ni metal powder and Mo metal powder which are arranged in an equal molar ratio. Compared with the prior art, the WC is added into the high-entropy alloy coating to change the structure of the coating, so that the properties of the coating in practical application are changed. The Mo element can promote formation of a sigma phase, a hard net-shaped framework is formed in the material, the grain boundary stability is improved, then the structural stability of the coating is improved, and excessive precipitation of a brittle phase is avoided while carbide distribution is optimized through a proper amount of WC. And the addition of WC can cause the solid solution strengthening effect of the high-entropy alloy, so that the hardness of the coating is improved.