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Method for identifying properties of heavy metal concentrate, heavy metal calx and tailing

A technology for smelting slag and heavy metals, which is applied in the field of heavy metal inspection to save time, ensure national border safety, and avoid environmental pollution

Active Publication Date: 2011-08-10
CHEM MINERALS & METALLIC MATERIALS INSPECTION CENT OF TIANJIN ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

For example, if the import declaration is made under the name of copper concentrate, the actual imported goods are suspected to be copper ash and residues, and taking advantage of the weakness of poor information at various ports in our country, it is impossible to pass through customs in different places, which seriously damages the normal trade order, pollutes the environment, and disrupts the customs clearance. society
Since the heavy metal ash and residue do contain a certain proportion of corresponding heavy metal elements, it is indistinguishable from the content of elements in heavy metal concentrate alone, and currently there is no effective identification method for heavy metal concentrate and heavy metal ash and residue in my country, which makes inspection and quarantine , The customs investigation took a lot of trouble, and we are urgently required to provide a theoretical basis, simple and effective identification method from a technical point of view

Method used

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  • Method for identifying properties of heavy metal concentrate, heavy metal calx and tailing

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Embodiment 1

[0083] analysis to judge. That is to say, the copper concentrate suspected of being artificially mixed with copper slag cannot be judged only from the results of component analysis. Even if the composition results are completely consistent with the elemental range of copper concentrate in Table 3, it cannot be judged that there is no copper slag mixed in it.

[0084] Table 4 Changes in composition of copper concentrate after mixing smelting slag

[0085]

[0086] X-ray diffraction comparative study results: When more than 10% of residues are mixed into the copper concentrate, the X-ray diffraction spectrum can clearly identify all the characteristic peaks of iron silicate, that is, it can effectively identify the smelting residues mixed in the sample;

[0087] When the copper concentrate is mixed with less than 10% residue, the X-ray diffraction spectrum cannot give all the characteristic peaks of iron silicate. However, according to the X-ray diffraction pattern analysis...

Embodiment 3

[0101] Using X-ray diffraction spectrum analysis: X-ray diffraction spectrum analysis is carried out on the selected samples, and it is found that the selected materials contain a large amount of iron silicate and elemental iron, and have characteristic peaks of iron silicate.

[0102] Mineral phase microscope analysis: observe the selected samples under a mineral phase microscope, and it can be seen that there are obvious molten bead-like objects.

[0103] Through X-ray diffraction and mineral phase microscope analysis, it can be judged that the sample contains smelting slag.

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Abstract

The invention relates to a method for identifying the properties of heavy metal concentrate and smelting tailing. The method adopts an X-ray fluorescence spectrometry, an X-ray diffraction spectroscopy, a metallographic microscopy and a scanning electronic microscopy to identify properties of heavy metal concentrate, heavy metal calx and tailing step by step by X-ray fluorescence spectrum detection data comparison, X-ray fluorescence diffraction spectrum analysis and comparison of iron silicate characteristic peak, determination of obvious metallurgical slag characteristics under a metallographic microscope and an electron microscope. By adopting the method, the goal of stopping renaming imported goods for cheating customs at the source is achieved, technical support is provided for inspection and quarantine and customs, and scientific inspection report is provided for a trader, thereby ensuring frontier safety and avoiding environmental pollution. The invention firstly firstputs forward and establishes an identification flow and standardizes an identification working method, thereby having guiding significance for the entire identification of imported waste material.

Description

technical field [0001] The invention relates to an inspection method for heavy metals, in particular to a method for identifying attributes of heavy metal concentrates and smelting slags suitable for inspection and quarantine systems, customs, scientific research units, universities, testing centers and manufacturers. Background technique [0002] Heavy metal concentrate refers to copper ore, lead-zinc ore and other mineral products that have been enriched with heavy metals after flotation and other mineral processing. It is the basic mineral raw material for the production of electrolytic copper, metal zinc and refined lead. Mineral ash and residue refers to slag, slag, dross and residue obtained from the processing of ore or metallurgical intermediate products (such as matte) or from electrolysis, chemical or other processes that are not mechanically processed metals, mainly including: (1 ), copper matte and slag or scum, for example, slag rich in copper, zinc, tin, lead,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/225G01N23/20G01N21/84G01N23/223
Inventor 谷松海宋义魏红兵王向东孙世明郭芬苏明跃
Owner CHEM MINERALS & METALLIC MATERIALS INSPECTION CENT OF TIANJIN ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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