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Dephosphorizing agent for hematite separation and preparation method thereof

A dephosphorization agent and hematite technology, applied in the field of dephosphorization agent and its preparation, can solve the problems of loss of iron components, environmental pollution by acid treatment, inability to remove silicon and dephosphorization, etc., and achieve low production cost and sufficient raw materials. Effect

Inactive Publication Date: 2007-11-28
HUBEI YICHANG LINSEN INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although different kinds of acids are also relatively strong dissolving agents, when the acid method is used to treat hematite, because the iron ore powder particles are small and are oxides, they are sensitive to acid reactions. At the same time, it is dissolved, resulting in the loss of iron content
Obviously, acid treatment cannot achieve the purpose of removing silicon and dephosphorization while retaining the iron content in iron ore, and acid treatment also has serious environmental pollution problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Take 100 kg of oil residue after vegetable oil is extracted from food oil, add it to a bioreactor, add 30 kg of 3% industrial salt water, heat up to 68°C, stir slowly and mix evenly, cool down to room temperature and let it stand for stratification, dehydration and slag removal , then warming up to about 35°C, adding 10 liters of nutrient solution in the logarithmic growth phase of the Aspergillus niger through mutation breeding, fermented for 6 hours, during the reaction, the monitoring oil content reached: 85%, fatty acid salt content reached ( Based on C18 sodium stearate): 8%, free organic acid content up to 6%. Cool and solidify. Remove the water phase to obtain the dephosphorization agent.

Embodiment 2

[0033] Take 150 kg of oily residue after peanuts are extracted from food oil, add it to a bioreactor, add 50 kg of 5% industrial salt water, heat up to 70°C, stir slowly and mix evenly, cool down to room temperature and let it stand for stratification, dehydration and slag removal , then heat up to about 35°C, and start the reaction after adding 15 kilograms of industrial lipase (lipase concentration is 1500u / L). Under the reaction temperature condition of 35°C, the reaction was stirred for 20 hours. During the reaction, the monitored oil content reaches: 80%, the fatty acid salt content (in terms of C18 sodium stearate): 10%, and the free organic acid content reaches: 6%. Remove the water phase, spin dry, cool, and solidify. That is, a high-efficiency silicon and dephosphorization agent is obtained. This agent is insoluble in water, ethanol, and melts when heated.

Embodiment 3

[0035]Add 100 kg of grease residues from cottonseed oil to food oil, add it to the bioreactor, raise the temperature to about 70°C, add 5 liters of 31% industrial hydrochloric acid, and start the reaction. Under the reaction temperature condition of 75°C, the reaction was stirred for 6 hours. During the reaction, monitor that the oil content reaches: 78%, the fatty acid salt content (in terms of C18 sodium stearate): 5%, and the free organic acid content reach: 8%, cool, remove the water phase, spin dry, and solidify . That is, a high-efficiency silicon and dephosphorization agent is obtained.

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Abstract

The invention relates to a dephosphorizing reagent that used to separating hematite and the preparation of it. The component of the dephosphorizing reagent that required in the invention is 50%-90% lipid, 4%-20% fatty acids according to C18 sodium stearate, and 2%-15% dissociative organic acid.

Description

field of invention [0001] The invention relates to a dephosphorization agent for beneficiation of hematite and a preparation method thereof. The dephosphorization agent required by the present invention comprises 50-90% grease, with C 18 4-20% fatty acid salt and 2-15% free organic acid in terms of sodium stearate. technical background [0002] The chemical composition of hematite is Fe2O3, and the crystal belongs to the oxide mineral of trigonal crystal system. Hematite is an iron mineral widely distributed in nature. It is an important iron-making raw material and can also be used as a red pigment. Most important hematite deposits are metamorphic, but some are hydrothermal, or weathered and colloidal in large water basins. There are many high-phosphorus hematites in hematite, and iron ore products directly obtained from high-phosphorus hematite cannot meet the technical indicators of the iron and steel industry, and the traditional hematite dephosphorization technology ...

Claims

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Application Information

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IPC IPC(8): C22B1/11
Inventor 黄林森邵金堤
Owner HUBEI YICHANG LINSEN INDAL
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