Abstract: A method for recovering waste lithium battery materials, comprising: (1) performing cell-disassembling on a waste lithium battery to obtain battery powder, ammonia leaching the battery powder to obtain a mixture, and subjecting the mixture to solid-liquid separation to obtain a leached solution and a filter residue; (2) adding a fluorine-phosphorus precipitating agent to the leached solution to obtain a mixture, and subjecting the mixture to solid-liquid separation to obtain a filtrate; (3) subjecting the filtrate to ammonia distillation, subjecting a mixture obtained to solid-liquid separation to obtain a filtrate and a filter residue containing basic copper carbonate and lithium carbonate; (4) washing the filter residue with water, and separating the basic copper carbonate to obtain a washing water; (5) reducing and calcining the filter residue, washing the residue, adding the washing water to the residue to collect lithium by water leaching, and filtering a mixture to obtain a filtrate.

Abstract: Base station antennas include a first RF port having a plurality of first radiating elements coupled thereto that form a first array and a second RF port having a plurality of second radiating elements coupled thereto that form a second array. At least some of the first radiating elements are arranged as a plurality of vertically-stacked triangular arrangements of first radiating elements and at least some of the second radiating elements are arranged as a plurality of vertically-stacked triangular arrangements of second radiating elements. One of the first radiating elements i a first of the triangular arrangements of first radiating elements is positioned in between two of the second radiating elements in a first of the triangular arrangements of second radiating elements.

Abstract: The present disclosure belongs to the field of lithium ion battery recovery and discloses a method for selectively recovering valuable metals in waste lithium batteries. The method includes the following steps: adding a sulfur-containing compound to waste lithium battery for calcination and water leaching to obtain lithium carbonate solution and filter residue; adding sulfuric acid and an iron-containing compound to the filter residue for leaching, performing solid-liquid separation, and taking solid phase to obtain manganese dioxide and graphite residue; extracting and reverse extracting liquid phase from the solid-liquid separation to obtain nickel cobalt sulfate solution and manganese sulfate solution. The method of the present disclosure selectively extracts lithium in waste ternary cathode materials by calcination and water leaching, and realizes selective low manganese leaching based on the principle that divalent manganese can reduce the high oxide of nickel and cobalt in the leaching stage.

Abstract: The invention discloses a mineralization method of a calcium chloride-type from lithium-containing salt lake brine by evaporation and brine mixing, comprising the following steps of: (1) naturally evaporating the calcium chloride-type from lithium-containing salt lake brine to precipitate sodium salt and potassium-containing mixed salt; and (2) when calcium in the brine is saturated, adding saturated solution of magnesium chloride in a certain proportion for brine mixing operation, and then naturally evaporating to precipitate carnallite, wherein a lithium-containing old brine with low potassium and sodium contents is obtained when magnesium in the brine is saturated. The method has the characteristics of simple process, simple and convenient operation, high potassium yield and easy extraction of lithium from lithium-containing brine, and has practical significance for the development and utilization of potassium and lithium resources in calcium chloride salt lakes.

Abstract: Disclosed is a method for purifying a nickel-cobalt-manganese leaching solution.

Abstract: Disclosed is a method for producing battery-grade nickel sulfate by using laterite nickel ore comprising the following steps: sorting the laterite nickel ore to obtain lump ore and sediment ore; crushing the lump ore, and then performing heap leaching, to obtain a crude nickel sulfate solution A; separating the sediment ore to obtain high chromium ore, low iron, high magnesium ore, and high iron, low magnesium ore, and drying, roasting, reducing, and sulfurating the low iron, high magnesium ore to obtain low nickel matte; blowing and performing water extraction on the low nickel matte, and then performing oxygen pressure leaching, to obtain a crude nickel sulfate solution B; performing pressure leaching on the high iron, low magnesium ore to obtain a crude nickel sulfate solution C; and performing extraction on the crude nickel sulfate solutions A, B, and C, and then evaporating and crystallizing, to obtain battery-grade nickel sulfate.

Abstract: Disclosed is a method for purifying a nickel-cobalt-manganese leaching solution.

Abstract: Disclosed is a method for producing battery-grade nickel sulfate by using laterite nickel ore comprising the following steps: sorting the laterite nickel ore to obtain lump ore and sediment ore; crushing the lump ore, and then performing heap leaching, to obtain a crude nickel sulfate solution A; separating the sediment ore to obtain high chromium ore, low iron, high magnesium ore, and high iron, low magnesium ore, and drying, roasting, reducing, and sulfurating the low iron, high magnesium ore to obtain low nickel matte; blowing and performing water extraction on the low nickel matte, and then performing oxygen pressure leaching, to obtain a crude nickel sulfate solution B; performing pressure leaching on the high iron, low magnesium ore to obtain a crude nickel sulfate solution C; and performing extraction on the crude nickel sulfate solutions A, B, and C, and then evaporating and crystallizing, to obtain battery-grade nickel sulfate.