Fe/C composite material prepared from oolitic hematite and adopting porous structure as well as preparation method of Fe/C composite material

A technology of oolitic hematite and porous structure, which is applied in the field of oolitic hematite and biomass resource utilization, can solve the problems of low calorific value of liquid fuel, carbon deposition in boilers, complex composition, etc., and achieve large pore volume, The effect of strong magnetism and high specific surface area

Active Publication Date: 2016-09-07
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pyrolysis gasification currently encounters the problem of tar purification in pyrolysis gas; pyrolysis liquefaction has the problem of low calorific value and complex composition of the liquid fuel produced; direct combustion has the problem of carbon deposition in boilers

Method used

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  • Fe/C composite material prepared from oolitic hematite and adopting porous structure as well as preparation method of Fe/C composite material
  • Fe/C composite material prepared from oolitic hematite and adopting porous structure as well as preparation method of Fe/C composite material
  • Fe/C composite material prepared from oolitic hematite and adopting porous structure as well as preparation method of Fe/C composite material

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Experimental program
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Effect test

Embodiment 1

[0026] This embodiment prepares Fe / C composite porous structure material according to the following steps:

[0027] (1) Select an oolitic hematite ore sample with an iron grade of 51.4%, crush it and pass through a 0.15mm sieve to obtain oolitic hematite powder; crush rapeseed straw and pass through a 1mm sieve to obtain straw powder;

[0028] (2) Weigh the oolitic hematite powder and straw powder according to the mass ratio of 1:2; first, spray a little water on the straw powder to make it moist, then add the oolitic hematite powder and mix evenly, bake dry to obtain a mixture;

[0029] (3) above-mentioned compound is added in the hopper of screw extruder molding machine, extruded and formed into the rod-shaped particle of diameter 6mm;

[0030] (4) Roast the formed rod-shaped particles in a tube furnace at 850°C for 25 minutes in a hydrogen atmosphere, and then naturally cool to room temperature in an oxygen-free atmosphere to obtain Fe / C composite porous structure materi...

Embodiment 2

[0034] This embodiment prepares Fe / C composite porous structure material according to the following steps:

[0035] (1) Select an oolitic hematite ore sample with an iron grade of 45.7%, crush it, and pass it through a 0.15mm sieve to obtain oolitic hematite powder; crush rape straw and pass it through a 1mm sieve to obtain straw powder;

[0036] (2) Weigh the oolitic hematite powder and straw powder according to the mass ratio of 1:5; first, spray a little water on the straw powder to make it moist, then add the oolitic hematite powder and mix evenly, bake dry to obtain a mixture;

[0037] (3) above-mentioned compound is added in the hopper of screw extruder molding machine, extruded and formed into the rod-shaped particle of diameter 6mm;

[0038] (4) Roast the formed rod-shaped particles in a tube furnace at 750°C for 30 minutes in a hydrogen atmosphere, and then naturally cool to room temperature in an oxygen-free atmosphere to obtain Fe / C composite porous structure mat...

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Abstract

The invention discloses a Fe/C composite material prepared from oolitic hematite and adopting a porous structure as well as a preparation method of the Fe/C composite material. The Fe/C composite material is characterized in that oolitic hematite powder and biomass powder are mixed, molded and then subjected to pyrolysis and reduction reactions in a reducing atmosphere, the Fe/C composite material adopting the porous structure is obtained, and main phases of the Fe/C composite material are biomass charcoal and zero-valent iron. The Fe/C composite material has the high open porosity, high magnetic susceptibility, high absorption performance and high biochemical activity, is applicable to purification of slightly-polluted water and is particularly applicable to simultaneous denitrification treatment of eutrophic water bodies.

Description

1. Technical field [0001] The invention relates to oolitic hematite and biomass resource utilization, and belongs to the field of mineral environmental engineering materials. 2. Background technology [0002] Oolitic hematite resources are widely distributed in my country, with proven reserves of 3.72 billion tons and prospective reserves of more than 10 billion tons. The ore is mainly composed of oolitic hematite, followed by siderite, magnetite, and limonite. The main gangue minerals are calcite, quartz, collophosite, dolomite, chalcedony, and oolitic chlorite. The iron grade of the ore is generally 30%-45%, and the phosphorus content is usually 0.4-1.1%. The outstanding features of this type of ore are low iron grade and high phosphorus, and the mineral particle size is small. Most of the mineral particle size is in the micron or even nanometer scale. not being properly utilized. How to make good use of this kind of mineral resources is an urgent problem that needs to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/00
CPCC21B13/0073Y02P10/20
Inventor 邹雪华陈天虎刘海波马志远张如玉谢治国
Owner HEFEI UNIV OF TECH
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