Industrial indicators are the basis for evaluating the industrial value of mineral deposits, delineating ore bodies, and calculating reserves.
To provide the industrial indicators used in the geological exploration report for mine construction design, the geological department shall submit the necessary geological data (including the beneficiation test report, etc.) and the preliminary opinions on the industrial indicators, which shall be entrusted by the competent department of the industry to calculate the research and then The competent industrial authorities at or above the provincial level determine.
According to the general requirements of industrial indicators used in the calculation of some known tin deposits in China, they are listed in Table 5 and can be used as a reference for geological evaluation of tin deposits.
Primary tin mine general industrial indicator reference table
Project request remarks
Cut-off grade 0.1-0.2% When the thickness of the mined body is less than 0.8 m, the percentage of the meter should be considered.
Minimum industrial grade 0.2-0.4%
The lowest recoverable thickness is 0.8-1.0 meters
Stone removal thickness 2 m pit
[Note] 1. This reference index is calculated in all tin and is suitable for deposits based on cassiterite.
2. When the amount of colloidal tin and tin sulfide in the ore accounts for a certain proportion (>10%), the index should be increased.
3. The ore mainly composed of colloidal tin and tin sulfide shall be separately formulated according to the technical and economic conditions of mining, selection and metallurgy.
4. Below the industrial grade, ore above the cut-off grade is included in the balance sheet.
5. For deposits with special circumstances, supplementary indicators may be proposed according to specific needs.
Such as the maximum peeling coefficient of open pit mining; oxidation rate of oxidized ore; ore-bearing coefficient.
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