6 results about "Resource recovery" patented technology

The invention provides a synergetic metal recycling method for nickel and cobalt containing waste batteries and copper containing electronic waste. The preliminarily smashed and metal element enriched waste batteries and the copper containing electronic waste are mixed, and a slag former and a reducing agent in a certain ratio are blended for an oxidative reducing reaction; relatively active metal iron, aluminum and the like in the reaction process form oxide to enter an upper layer slag phase; metal cobalt and nickel enter copper liquid on the bottom layer, and therefore the metal phase and a slag phase are separated, and metal containing copper, cobalt and nickel is obtained; and copper, cobalt, nickel and other high-purity metal are recycled through electrorefining. The method is short in flow, high-temperature thermometallurgy is adopted for synergetically recycling the valuable metal in the batteries and the electronic waste, and the problems that traditional waste battery wet recycling efficiency is low, the environment is polluted, a large amount of lixivium needs to be used, and a large amount of acid and alkaline is consumed are avoided; and an efficient novel recycling way is provided for waste ternary battery and electronic waste resource recycling, and good industrial application prospects are achieved.

The invention discloses a method of synthesizing a nano zinc silicate light emitting material by using waste silicon powder by a hydrothermal method. The method comprises the following steps: (1) dissolving Zn(CH3COO)2.2H2O, Mn(NO3)2.4H2O and hexadecyl trimethyl ammonium bromide in deionized water, adding the waste silicon powder, stirring for 15 minutes, adding sodium hydroxide or ammonium water with concentration being 25%, and stirring for 10 minutes to obtain a mixed solution; (2) putting the mixed solution prepared in the step (1) in a reaction kettle with the liner being polytetrafluoroethylene, sealing the reaction kettle, putting the kettle in an oven at 130-200 DEG C to react for 12-48 hours, taking, naturally cooling to room temperature, washing the product by distilled water. carrying out centrifugal separation, and naturally drying to obtain the zinc silicate light emitting material. By using waste silicon powder as a raw material, the method disclosed by the invention expands the range of reactants and can fully utilize industrial leftovers and achieve the purpose of recycling resources. Furthermore, the method disclosed by the invention which is a hydrothermal one-step reaction is simple and feasible and low in energy consumption.

The invention relates to a method for preparing a vanadium-nitrogen alloy with an inactive vanadium pentoxide catalyst, and belongs to the technical field of alloy preparation. The method comprises the following steps: first, igniting a magnesium ribbon to release a large quantity of heat; carrying out a reaction between aluminum powder and ferriferous oxide to generate a large quantity of heat; carrying out a reaction between residual aluminum powder and inactive vanadium pentoxide under a high-temperature condition and protection of nitrogen to obtain a mixture of magnesium nitride, molten iron, aluminum oxide and the like; removing a mixture, floating on the surface of a molten iron mixture, of aluminum oxide and the like; and burning the left mixture to obtain the vanadium-nitrogen alloy. During preparation of the vanadium-nitrogen alloy, the reactions can be carried out according to internal temperatures, and deliberate temperature control is avoided, so that the operation is simple; and as the inactive vanadium pentoxide catalyst is taken as a main raw material, the resource is recovered and reused, and the cost is reduced.

The invention belongs to the technical field of clean coal carbon preparation, and particularly relates to a chemical purification method for preparing ultralow ash coal from clean coal, which comprises the following steps: S1, oxygen-isolated activated roasting: roasting clean coal in an oxygen-free environment to obtain an oxygen-isolated activated roasting product; s2, low-temperature alkali dissolution and silicon separation: adding the oxygen isolation activated roasting product obtained in S1 into a caustic alkali solution, dissolving out active silicon at low temperature, and filtering to obtain aluminum-containing coal and silicon-containing filtrate; and S3, high-temperature alkali dissolution and aluminum separation: adding the aluminum-containing coal obtained in S2 into a sodium aluminate solution, dissolving out aluminum at a high temperature, and filtering and washing to obtain ultralow-ash coal and the sodium aluminate solution. The method provided by the invention can realize deep purification of coal and preparation of ultralow ash coal, and can realize resource recovery of silicon and aluminum and cyclic utilization of alkali liquor at the same time, thereby providing a new technical idea for extraction of ultralow ash carbon in coal industry and realization of high-valued upgrading of products, and overcoming the defects of the existing method at the same time.