Method for extracting molybdenum, nickel, vanadium and ferrum from polymetallic black-shale paragentic minerals

Abstract

The invention discloses a method for extracting molybdenum, nickel, vanadium and ferrum from polymetallic black-shale paragentic minerals, comprising the following steps of: ball-milling the polymetallic black-shale paragentic minerals, and then adding into a pressure kettle for oxygen pressure leaching to obtain leach liquor containing ferrous sulphate, molybdenum trisulfate acyl, vanadic acid and nickel sulfate and leach residues containing molybdic acid sediments; adding ammonia water into the leach liquor to extract the vanadium; then carrying out reextraction to obtain ammonium vanadate; generating sediments containing the molybdenum and the ferrum and a solution containing the nickel; filtering to obtain nickel carbonate; carrying out warming alkaline leach on the leach residues containing the molybdic acid sediments and the sediments containing the molybdenum and the ferrum; filtering to obtain an alkaline leach solution containing the molybdenum and filter residues containing the ferrum; after resin absorbs the molybdenum, eluting, acid-precipitating, filtering, drying and calcining to obtain molybdenum trioxide; and acid-dissolving, reducing and filtering the filter residues containing the ferrum to obtain green vitriol. The invention prevents the pollution of smoke gases, such as sulfur dioxide and the like in environment and has low production cost and high recovery rate of molybdenum, nickel and by-products of the vanadium and the ferrum.

Description

technical field [0001] The invention relates to a method for extracting molybdenum, nickel, vanadium and iron from polymetallic black shale intergrowth ore, and belongs to the technical field of metallurgy and chemical industry. Background technique [0002] At present, there are very rich polymetallic black shale deposits at the junction of Hunan, Chongqing, and Guizhou provinces and cities in my country. The resources are stable, well developed, shallowly buried, and easy to mine. In the Zunyi area alone, there are more than 140 square kilometers of black shale polymetallic mining areas, and the resource metal content is estimated to be about 1 million tons, including 3.5-9% molybdenum, 2-6% nickel, 8-20% phosphorus, and 10% sulfur. -18%, iron 12-15%, carbon 10-12%, vanadium 0.05-1%, uranium 0.05%, as well as precious metals such as tungsten, platinum, rhodium, lead, etc., most of which have industrial development value. The trace element characteristics show that the pol...

AI Technical Summary

Problems solved by technology

Although the total recovery rate of molybdenum and nickel in this inventive method is high, the components obtained after separation are few, and other valuable by-products such as vanadium and iron in the ore are not separated, and the recovery of polymetallic black shale cannot be achieved. The full and effective utilization of the symbiotic ore also has problems such as complex process operation, large consumption of reagents, and high cost

[0007] For the treatment method of the above-mentioned polymetallic black shale paragenetic ore, its disadvantages are that the technical process is complicated, the metal recovery rate is low and single, the valuable metal is dispersed, the separation of molybdenum, nickel, vanadium and iron in the mineral is difficult, and the reagent consumption is low. Large, high cost, poor benefit, difficult to overcome the complexity of minerals, slag can not be processed, with oxidation roasting or salt roasting process, the environmental pollution of sulfur dioxide is serious, a large amount of smoke is generated during the roasting process, which seriously pollutes the environment

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