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Study on Concentration Methods of Ningxiang Type Iron

Author: YinWenJun
Tutor: ZhuYiMin；LiYanJun
School: Northeastern University
Course: Mineral Processing Engineering
Keywords: Ningxiang type iron ore Oolitic hematite Flotation High intensity magnetic separation
CLC: TD951
Type: Master's thesis
Year: 2008
Downloads: 130
Quote: 1
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Abstract


Ningxiang type belongs sedimentary iron deposit iron ore reserves are more widely distributed in our country , is recognized at home and abroad refractory iron ore . Focused Ningxiang type iron process mineralogy to determine the the beneficiation test method is mainly used in high intensity magnetic separation and reverse flotation . Test equipment of high intensity magnetic separation XCQS type wet high intensity magnetic separator , and study the impact of the current strength of sorting indicators ; and the Reverse Flotation oil SODIUM the separation of hematite and gangue minerals , and discussed the election of another separation mechanism . The process mineralogy studies Ningxiang iron ore that Institute ore typical of oolitic hematite iron grade of 50.61% . Crystalline hematite fine particle size of less than 10μm , and mostly oolitic chlorite symbiosis . Grinding aid grinding intensity magnetic separation test , 10kg / t more than 80 ° C , temperature control , grinding time of 40 minutes . XCQS type current strength of the strong magnetic separator 8A , the highest grade iron ore was 53.34% , the recovery rate was 85.58% . Sodium oleate flotation system , grinding 10kg / t grinding aids , temperature controlled at 80 ° C above the grinding time of 40 minutes , and then for the flotation test . 10.5,0 # sodium oleate to adjust the pH value of calcium oxide to 600g / t, the amount of starch 1000g / t grade iron ore , up to 54.93% , and the recovery rate was 35.31% . Seen Ningxiang type iron ore flotation mechanism of the mode of action of the starch and hematite is mainly based on the molecular chain hydroxyl group with the mineral surface to form a hydrogen bond in the form of adsorption on the mineral surface ; sodium oleate mainly by oleic acid of physical adsorption and chemisorption of oleic acid ion in the form of the molecule adsorbed on the mineral surface . This research provide some technical basis for further study of the oolitic hematite beneficiation separation .

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CLC: > Industrial Technology > Mining Engineering > Beneficiation > Metallic Ore Dressing > Black Metallic Ore Dressing
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