A deep iron extraction and impurity reduction process for refractory siderite ore resources
A kind of iron ore, refractory technology, applied in solid separation, chemical instruments and methods, magnetic separation and other directions, can solve the problems of adverse effects of smelting process, low recovery rate, high processing cost, and achieve good effect of iron extraction and impurity reduction. Effect
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Embodiment 1
[0025] The ore sample comes from an iron ore containing 36.53% iron, 0.86% sulfur, 0.95% phosphorus, 18.23% silicon dioxide, and 9.23% aluminum oxide in a certain area in Chongqing. The iron in the sample is mainly siderite, and it also contains some Iron minerals such as red limonite, pyrite, iron silicate, etc.
[0026] The iron ore is crushed to less than 3mm; the ore crushed to less than 3mm is placed in a roaster, and the temperature is controlled at 400°C for drying and dehydration, and the drying time is controlled at 30 minutes; the dried and dehydrated material is dried Grind to below -0.074mm, add 0.5% cuprous chloride, 3% lime, 20% magnesium chloride, 1% calcium chloride, 20% coke and mix with the material, then use a pelletizer to prepare pellets pellets with a diameter of 8 mm; dry the pellets with a water content of less than 8% in a roasting furnace at a drying temperature of 200°C; dry the pellets with a water content of less than 8% Put the raw material into ...
Embodiment 2
[0034] The ore sample comes from an iron ore containing 34.23% iron, 0.66% sulfur, 0.72% phosphorus, 20.68% silicon dioxide, and 11.22% aluminum oxide in a certain area in Yunnan. The iron in the sample is mainly siderite, and also contains some Hematite, pyrite, iron silicate and other iron minerals.
[0035] The iron ore is crushed to less than 3mm; the ore crushed to less than 3mm is placed in a roaster, and the temperature is controlled at 600 °C for drying and dehydration, and the drying time is controlled at 60min; the dried and dehydrated materials are dry-ground To below -0.074mm, add 3% cuprous chloride, 15% lime, 50% magnesium chloride, 3% calcium chloride, 40% coke and mix with the material, and then use a pelletizer to prepare pellets The pellets with a diameter of 8mm; the pellets with a diameter of 8mm are dried in a roasting furnace, and the drying temperature is 300 ℃, and the pellets are dried to a moisture content of less than 8%; the pellets with a moisture co...
Embodiment 3
[0043] The ore sample comes from iron ore containing 41.25% iron, 0.87% sulfur, 0.98% phosphorus, 21.55% silicon dioxide, and 14.25% aluminum oxide in a certain area in Shaanxi. The iron in the sample is mainly siderite, and also contains some Hematite, pyrite, iron silicate and other iron minerals.
[0044] The iron ore is crushed to less than 3mm; the ore crushed to less than 3mm is placed in a roaster, and the temperature is controlled at 500°C for drying and dehydration, and the drying time is controlled at 30min; the material after drying and dehydration is dry-ground To below -0.074mm, add 2% cuprous chloride, 10% lime, 40% magnesium chloride, 2% calcium chloride, 35% coke and mix with the material, and then use a pelletizer to prepare pellets The pellets with a diameter of 8mm; the pellets with a diameter of 8mm are dried in a roasting furnace, and the drying temperature is 250 ° C, and the pellets are dried to a moisture content of less than 8%; the pellets with a mois...
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