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Method for determining content of noble metal in rock ores by fire assaying method

A fire assay method and precious metal technology, applied in the field of metallurgy, can solve problems such as poor collection effect, high lead toxicity, and application restrictions, and achieve the effects of low cost, more precious metals, and low detection limit

Inactive Publication Date: 2014-06-25
河南省岩石矿物测试中心
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  • Application Information

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Problems solved by technology

As the traditional fire assay gold method, lead has high enrichment efficiency and good analysis reproducibility for palladium, platinum, and gold, but it has poor collection effect on ruthenium, osmium and iridium among precious metal elements; The lead used is highly toxic and causes serious pollution to the human body and the environment, so its application is greatly restricted

Method used

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  • Method for determining content of noble metal in rock ores by fire assaying method
  • Method for determining content of noble metal in rock ores by fire assaying method
  • Method for determining content of noble metal in rock ores by fire assaying method

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Embodiment Construction

[0018] Preparation of covering agent: mix light magnesia and silicon carbide crushed to 0.074mm in a ratio of 1:1, set aside.

[0019] Fire test gold ingredients: mix sodium carbonate, potassium carbonate, borax, tin powder, silicon dioxide, and flour at a mass ratio of 4:4:4:2:2:1 to prepare a fire test gold mixed flux.

[0020] The rock ore samples were pulverized to pass through a 0.074mm sieve to obtain precious metal element analysis samples. Fully mix the precious metal element analysis sample with the fire test gold mixed flux according to the mass ratio of 1:2~4, pour the mixed sample into the heated test gold crucible, and add an appropriate amount of covering agent evenly, and quickly put the test gold crucible Put it into a high-temperature furnace at 1125°C, smelt until the melt is calm, pour it into an iron mold, and after the melt cools, smash the vitreous slag and take out the tin buckle.

[0021] Flatten the tin buckle, put it into a ground-mouth Erlenmeyer fl...

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Abstract

The invention discloses a method for determining the content of noble metal in rock ores by a fire assaying method. The method takes light magnesium oxide and silicon carbide which have reducing actions as covering agents so as to realize an analysis method for determining eight noble metal elements in a rock ore sample by primary separation. The method disclosed by the invention can be accurate and efficient and is suitable for a technology for analysis and testing work of the noble metal elements in various rock ore samples.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a method for determining the content of precious metals in rock ore by fire assay. Background technique [0002] Precious metals consist of eight elements. Because of their high melting point, high boiling point, low vapor pressure, superior corrosion resistance, and weathering resistance, they have been widely used in various sectors of the national economy. Among them, the silver content is relatively high, and generally no enrichment is required. The other seven elements are gold (Au), platinum (Pt), palladium (Pd), ruthenium (Ru), rhodium (Rh), osmium (Os), and iridium (Ir). It is rare in the earth's crust and difficult to distinguish with the naked eye. It is a group of chemical elements whose geochemical distribution is least understood by people so far; it is the most difficult element recognized today. This is because: ① The geological sample matrix is ​​complex an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/62G01N1/34G01N27/626
Inventor 王烨王君玉王梅英闫红岭连文莉李志伟李杰
Owner 河南省岩石矿物测试中心
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