5 results about "Partial pressure" patented technology

The invention relates to a nickel-containing high-cobalt sulfide leaching technology. A leaching liquor rich in metal cobalt obtained through atmospheric pressure preheating and pressure leaching can directly enter a cobalt production system. The technology comprises the following technical steps of: (1) slurrying minerals in 10-20 g/l dilute acid solution, controlling the ratio of dilute acid volume to material mass at 6:1, and controlling slurrying temperature at 40-50 DEG C, slurrying time at 2-3 h and the concentration of slurrying end point acid at 5-15 g/l; (2) controlling the temperature of atmospheric pressure preheating at 80-85 DEG C; (3) controlling pressure leaching, controlling the ratio of dilute acid volume to material mass at 6:1, reaction temperature at 145-165 DEG C, and leaching partial pressure oxygen at 0.20-0.25 Mpa and reaction time at 6-8 h. In the invention, a nickel and cobalt sulfate solution containing more than 50 g/l cobalt is obtained, i.e. more than 98% of Ni and Co in the nickel-containing high-cobalt sulfide material is leached out to enter the solution.

A method for concentrating platinum and palladium from platinum-palladium flotation concentrates is composed of the following steps of adding sulfur of which the mass accounts for 0.2%-10% of the platinum-palladium flotation concentrates according to the mass ratio (1:3-9) of the platinum-palladium flotation concentrate to sulfuric acid solutions with the concentration of 150-250 g/L; leaching for1-5h under the oxygen partial pressure of 0.5-1.0 MPa, at the leaching temperature of 120-160 DEG C, pH of less than 0.5, and the stirring speed of 400-600 r/min; after leaching, maintaining the original stirring speed, cooling to 108-114 DEG C at the rate of 0.2-0.5 DEG C/min, and holding for 1-3h; continuously cooling to room temperature at the rate of 0.4-1.0 DEG C/min and the stirring speed of 150-300 r/min; and filtering to obtain leachate and leaching residues, and screening the leaching residues with a 100-mesh screen to obtain platinum-palladium concentrates and tailings. The method is simple in operation, and the purposes of concentrating precious metal including platinum and palladium as well as three-phase separation of base metal including copper, nickel, zinc, iron and silicate tailings are achieved synchronously; and the content and enrichment ratio of the precious metal in the platinum-palladium concentrates are high, and the subsequent separation cost is reduced obviously.

The invention discloses an amino phosphate water-soluble corrosion inhibitor and a preparation method thereof. The corrosion inhibitor contains, by weight, 30-45 parts of amino phosphate mixed solutions, 4-6 parts of N-methyl thiourea, 5-10 parts of ethylene glycol monomethyl ether, 5-8 parts of formamide, 5-9 parts of p-hydroxybenzoic acid, 1-5 parts of nonylphenol polyoxyethylene ether, 1-2 parts of octyl phenol polyoxyethylene ether, 6-23.5 parts of water, 8-15 parts of vinyl ethylene glycol ether, 0.5-2.5 parts of3-methyl-2-pentene-4-alkynol and 2-6.5 parts of acetaldehyde methyl hexyl acetal. The amino phosphate corrosion inhibitor has good anti-corrosion effects on an oil and gas field collecting and conveying system with high CO2 (partial pressure of 0-5 MPa) and H2S coexistence (the partial pressure of 0-1 MPa).