Phase analysis method of pt, pd, au in black rock type platinum group minerals

Abstract

The invention discloses a phase state analysis method of Pt, Pd and Au in black rock-type platinum group minerals, combining the mineral composition of black rock, the enrichment form of precious metal elements in such minerals and the properties of precious metal elements, and referring to The analysis method of the active state of platinum, palladium and gold divides the occurrence phases of Pt, Pd, and Au in black rocks into four phases: exchangeable phase, organic binding phase, sulfide binding phase, and residue phase. By developing a new desorbent ─Potassium thiocyanate-sodium cyanide, which inhibits the adsorption of organic matter and carbon to Pt, Pd, and Au in each phase. Use 5% triammonium citrate, sodium pyrophosphate buffer solution, glacial acetic acid-hydrogen peroxide to leach Pt, Pd, and Au in the exchangeable phase, organic binding phase, and sulfide binding phase, and accurately determine the state of each phase by ICP-MS The content of Pt, Pd and Au in the black rock provides a theoretical basis for geological prospecting and comprehensive utilization of precious metal elements in black rock.

Description

technical field [0001] The invention belongs to the technical field of ore deposit analysis, and in particular relates to a method for phase analysis of Pt, Pd and Au in black rock type platinum group minerals. Background technique [0002] At present, the main types and distribution rules of PGE deposits, the basic characteristics of deposit types, and the PGE enrichment law are far from enough, and the classification of PGE deposits has not yet been formed. According to the research results of petrology, mineralogy and geochemistry, the platinum group elements in my country are mainly divided into three types of deposits of magmatic origin, magmatic hydrothermal origin and sedimentary origin. The polymetallic mineralization of black shale in different geological ages has become the focus of geologists, especially the discovery of metal deposits in black shale associated with platinum group elements and high content of organic carbon. According to the research results on t...

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Problems solved by technology

Due to the presence of a large amount of carbon and organic matter in black rock, which has a strong adsorption effect on PGE, the leaching agent cannot effectively leach PGE when leaching the exchangeable bonded state.

Using heavy liquid to separate carbon and organic matter, because the carbon particles in minerals are too fine, even if the sample particle size reaches 600 mesh, the carbon and mineral phases cannot be completely separated

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