Report Name: Gannan in Gansu Province a magnetic iron ore mine test optional study reporting format: word
Completion: July 2007 Publisher: Guo Changqing guidance of experts: exchanging views Gong Meiling Project leader: Zhang <br> World Bank report Pages: 22 Total starts Foreword
Introduction to the report:
Foreword:
In June 2007, Gannan XXX Iron Mine in Gansu Province commissioned Xi'an Tianzhou Mining Technology Development Co., Ltd. for the development and utilization of the mine, and conducted an ore selectivity test on the iron ore. The purpose is to test the iron. The development and utilization of the mine provides a set of economic and reasonable process flow and economic and technical indicators to provide reference for the development and utilization of the mine.
Gannan XXX iron ore is an acidic iron ore. From the iron phase analysis results, the main mineral of the iron ore is magnetite, followed by ( copper ) magnetic (yellow) iron ore, followed by iron silicate. It is seen from the rock mine identification report that iron consists of two types of magnetic iron, mainly magnetite (about 33%), followed by pyrrhotite (about 1-3.5%), and a small amount of chalcopyrite. . At present: there is no reasonable utilization of iron silicate. Therefore, iron silicate in ore generally does not emphasize recovery in ore dressing . Due to chalcopyrite (small amount), it is fine-grained and grows in pyrrhotite crystal. Grain edge. Pyrrhotite (1%) he shaped fine particles. It is difficult to sort these two mines, and it is not cost-effective to cut the recovery rate of magnetite. Therefore, the iron mineral mainly recovered by the iron ore is magnetite. For magnetite, the ore dressing process is mature, and the magnetic field selection by weak magnetic field can often obtain high grade and recovery rate.
The iron ore is magnetically selected by weak magnetic field, the rough selected field strength is 1250 Oersted, and the selected 1100 Oersted, the iron concentrate grade is 64.80%, the total iron recovery rate is 72.13%, and the magnetic iron recovery rate is 100%. The indicators are ideal and can be used as a reference for the design of the plant.
Conclusion:
1. Gannan XXX iron ore mine in Gansu Province, the ore contains CaO 6.71%, MgO 6.18%, SiO 2 25.60%, Al 2 O 3 5.89%, according to alkalinity
CaO+MgO
(——————> 1.2 is an alkaline ore less than 0.8 is an acid ore) The iron ore is an acidic iron ore.
SiO 2 +Al 2 O 3
2. Iron ore of Gannan Yongtai Mining Company of Gansu Province, with a total iron grade of 34.63%. After magnetic field selection by weak magnetic field, the iron concentrate grade is 64.80%, the yield is 38.50%, and the total iron recovery rate is 72.13%. For magnetite, The iron recovery rate is 100%, and the test indicators are ideal.
3. According to the preliminary economic benefit estimation, the construction of a daily processing 500 tons of concentrating plant, 300 days of work, annual profit and tax of 18,235,500 yuan.
4. The recommended process flow for the selection process is a coarse and two fine.
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