2 results about "Bismuth phosphate" patented technology

The present application belongs to the technical field of non-ferrous metallurgy, and particularly relates to a method for cooperatively removing copper, arsenic, tellurium and lead in crude bismuth, which comprises the following steps: S1, obtaining molten bismuth liquid by melting, adding an oxidizing agent to the molten bismuth liquid, and performing a pre-oxidation reaction under stirring; S2, adding a composite removing agent and a fluxing agent to perform a reaction, and then removing surface dross; the composite removing agent comprises iron powder, bismuth phosphate and sodium sulfide; S3, adding the crude bismuth after step S2 to a vacuum rectification furnace, vacuum heat-insulating, and outputting refined bismuth. Through the cooperative design of pre-oxidation activation, in-situ sulfidation and phosphate slagging, the present application realizes the simultaneous and efficient removal of impurities such as Cu, As, Te and Pb, and the effective recovery of Ag. Subsequent vacuum distillation further removes residual lead in depth, and ensures that the refined bismuth product reaches a high standard.

A battery negative electrode material, and a preparation method therefor and a use thereof. The battery negative electrode material comprises an active material; the active material is a composite material containing bismuth phosphate, phosphorus, bismuth, and a conductive carbon material. By introducing bismuth phosphate into the active material, on the one hand, the battery negative electrode material can enhance the dispersion effect of the conductive carbon material, phosphorus and crystalline bismuth, effectively preventing the occurrence of agglomeration; and on the other hand, because the bismuth phosphate is an inactive ingredient, the presence of bismuth phosphate in the active material can effectively mitigate a large volume change during charging and discharging, facilitating the stability of an SEI film, thereby endowing electrode materials with better cycle stability.