In mining, what could they do with the unwanted rock material after they crush the ore.
Inferior sources of iron ore generally required beneficiation. Due to the high density of hematite relative to silicates, beneficiation usually involves a combination of crushing and milling as well as heavy liquid separation. This is achieved by passing the finely crushed ore over a bath of solution containing bentonite or other agent which increases the density of the solution. When the density of the solution is properly calibrated, the hematite will sink and the silicate mineral fragments will float and can be removed. Taconite mining involves moving tremendous amounts of ore and waste. The waste comes in two forms, bedrock in the mine (mullock) that isn't ore, and unwanted minerals which are an intrinsic part of the ore rock itself (gangue). The mullock is mined and piled in waste dumps, and the gangue is separated during the beneficiation process and is removed as tailings. Taconite tailings are mostly the mineral quartz, which is chemically inert. This material is stored in large, regulated water settling ponds. Magnetite is beneficiated by crushing and then separating the magnetite from the gangue minerals with a magnet. This is usually so efficient that lower grade ore can be treated when it is magnetite than a comparable grade of hematite ore, especially when the magnetite is quite coarse. To convert an oxide of iron to metallic iron it must be smelted or sent through a direct reduction process.
No. I have never had a crush on celebrities or movie stars, rock musicians . I am more of a realistic person I guess. But I used to dream about some of them being my siblings as I did not have siblings in real lifeFor instance it would be super cool if Joe Satriani or Phil Collins were my older brothers! That would be amazing. edit.I was thinking from the perspective of an adult.but thinking way back when I was a young girlI did have a crush on the singer of SWEET Brian Connolly. I had posters of him plastered on my bedroom walls. I was 12 or so and dreamed about him singing Blockbuster for me! First and last crush. Thanks Smiley for reminding me of that! You know me better than myself now.
Inferior sources of iron ore generally required beneficiation. Due to the high density of hematite relative to silicates, beneficiation usually involves a combination of crushing and milling as well as heavy liquid separation. This is achieved by passing the finely crushed ore over a bath of solution containing bentonite or other agent which increases the density of the solution. When the density of the solution is properly calibrated, the hematite will sink and the silicate mineral fragments will float and can be removed. Taconite mining involves moving tremendous amounts of ore and waste. The waste comes in two forms, bedrock in the mine (mullock) that isn't ore, and unwanted minerals which are an intrinsic part of the ore rock itself (gangue). The mullock is mined and piled in waste dumps, and the gangue is separated during the beneficiation process and is removed as tailings. Taconite tailings are mostly the mineral quartz, which is chemically inert. This material is stored in large, regulated water settling ponds. Magnetite is beneficiated by crushing and then separating the magnetite from the gangue minerals with a magnet. This is usually so efficient that lower grade ore can be treated when it is magnetite than a comparable grade of hematite ore, especially when the magnetite is quite coarse. To convert an oxide of iron to metallic iron it must be smelted or sent through a direct reduction process.
No. I have never had a crush on celebrities or movie stars, rock musicians . I am more of a realistic person I guess. But I used to dream about some of them being my siblings as I did not have siblings in real lifeFor instance it would be super cool if Joe Satriani or Phil Collins were my older brothers! That would be amazing. edit.I was thinking from the perspective of an adult.but thinking way back when I was a young girlI did have a crush on the singer of SWEET Brian Connolly. I had posters of him plastered on my bedroom walls. I was 12 or so and dreamed about him singing Blockbuster for me! First and last crush. Thanks Smiley for reminding me of that! You know me better than myself now.
