Process for extracting iron from high-silicon aluminum haematite
A hematite and high-silicon-alumina technology, which is applied in the field of high-silicon-alumina hematite iron extraction technology, can solve the problems that hematite cannot be fully and rationally utilized, so as to alleviate the sharp increase in selling price, reduce production costs, The effect of increasing production cost
Inactive Publication Date: 2012-05-30
SHANDONG QIANSHUN MINING & METALLURGY SCI
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Problems solved by technology
However, the beneficiation technology for high-silicon and high-aluminum hematite has not yet been broken through, resulting in the large reserves of high-silicon and high-alumina hematite in some areas of my country cannot be fully and rationally utilized
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Embodiment
[0018] A kind of high-silicon-alumina hematite iron extraction process of the present invention comprises the following steps:
[0019] ① The raw material of hematite ore containing high silicon and high alumina is hematite ore with iron grade of 45%-51%, silicon dioxide content of 10.5-16.8%, and aluminum oxide content of 7-11.5%. Add water into the mixing tank and stir to form a slurry, the concentration of the slurry is 15-25%;
[0020] ②Put the ore pulp into the spiral chute for gravity separation, and select the iron concentrate with a grade of 60%, and obtain medium ore and tailings at the same time;
[0021] ③Put the medium ore product obtained in step ② into the ball mill and add water to grind the ore, and the grinding concentration is 70%;
[0022] ④Put the tailings obtained in step ② and the pulp obtained in step ③ into the stirring tank and mix evenly, then add a dispersant, fully stir and adjust the slurry to obtain the pulp, and the dispersant is composed of sod...
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The invention discloses a process for extracting iron from high-silicon aluminum haematite, which comprises the following steps: 1) placing the haematite containing high silicon and high aluminum into a stirring tank, adding water and stirring for forming ore slurry; 2) performing gravity separation on the ore slurry for getting middling and tailing; 3) placing a middling product obtained in the step 2) into a ball mill and adding water for grinding ore; 4) placing the obtained tailing and the obtained ore slurry into the stirring tank, uniformly mixing and then adding a dispersing agent; 5) sending the ore slurry into a strong magnetic machine for performing strong magnetic separation for getting iron ore concentrate and tailing; 6) placing the tailing into a concentration tank for getting ore slurry; 7) placing the ore slurry into a stirring machine and adding a roasting reducing agent for getting granules; 8) roasting the granules for getting a reduced iron ball product; 9) comminuting the iron ball product; and 10) performing magnetic separation on material after comminution for getting an iron ore concentrate product and tailing sand, and merging the obtained iron ore concentrate for getting the iron ore concentrate product. The haematite containing the high silicon and the high aluminum is adopted as raw material, and the iron ore concentrate is extracted through the process, thereby enabling the iron grade to be higher than 68% and the recovery rate of the iron to be higher than 97%.
Description
technical field [0001] The invention relates to smelting technology, which is a process for extracting iron from high-silicon-alumina hematite. Background technique [0002] Iron ore with high silicon content and high aluminum content has been considered as a difficult problem in the field for many years due to the difficulty of iron selection and high production costs. However, iron ore with high silicon content and high aluminum content has a large reserve in Guangxi and other places in my country. Although the price of iron ore is low, it still cannot be fully utilized. In recent years, as the value of iron ore continues to rise, the research topic of those skilled in the art has turned to the iron ore containing high-silicon and high-aluminum iron ore that has a large reserve and has not been fully utilized. According to the reported data, some breakthroughs have been made in the beneficiation technology of high-alumina-containing iron ore or high-silicon-containing iro...
Claims
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IPC IPC(8): C22B1/02B03B7/00
CPCC22B1/2406C22B1/00B03B7/00C22B1/26
Inventor 冯婕韩京增李祎苑光国王明银张燕云王伟
Owner SHANDONG QIANSHUN MINING & METALLURGY SCI