284results about "Nickel sulfides" patented technology

The invention discloses a comprehensive utilization method of serpentine and a device used by the method. The comprehensive utilization method comprises the following steps of: adding sulfuric acid into the serpentine and heating up, filtering to obtain first filtrate and acidolysis residues; adding water and sodium hydroxide into the acidolysis residues, and filtering to obtain sodium silicate; adding oxidant into the first filtrate; adding a pH value regulator to carry out precipitation reaction, and filtering to obtain an iron-aluminum mixture and second filtrate; adding water and sodium hydroxide into the iron-aluminum mixture, and filtering to obtain iron precipitates and a sodium metaaluminate solution; adding sulfide into the second filtrate for reacting, and filtering to obtain a nickel-cobalt mixture and third filtrate; adding oxidant into the third filtrate for reacting; and adding alkali adsorbent and filtering to obtain a magnesium sulfate solution. The device comprises a first acidolysis slot, a first filter, an alkaline hydrolysis reactor, an iron-aluminum precipitation reactor, an alkaline washing reactor, a nickel-cobalt precipitation reactor, a second filter, a third filter, a fourth filter and a fifth filter. According to the comprehensive utilization method of the serpentine and the device used by the method disclosed by the invention, six elements in the serpentine can be extracted, so that the values of the elements are sufficiently utilized.