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Method for preparing Fe/C composite porous structure material by using limonite

A porous structure, limonite technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve the problems of low calorific value of liquid fuel, complex composition, carbon deposition in boilers, etc. Achieve the effects of enhanced pyrolysis and gasification, large pore volume, and elimination of tar

Active Publication Date: 2016-08-10
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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  • Method for preparing Fe/C composite porous structure material by using limonite
  • Method for preparing Fe/C composite porous structure material by using limonite
  • Method for preparing Fe/C composite porous structure material by using limonite

Examples

Experimental program
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Effect test

Embodiment 1

[0025] This embodiment prepares Fe / C composite porous structure material according to the following steps:

[0026] (1) Select a limonite ore sample with an iron grade of 48.9%, crush it and pass through a 0.1mm sieve to obtain limonite powder; crush rape straw and pass through a 1mm sieve to obtain straw powder;

[0027] (2) Weighing the limonite powder and the straw powder according to the mass ratio of 1:3 and mixing them evenly to obtain the mixture;

[0028] (3) above-mentioned mixture is added in the hopper of screw extruder molding machine, extruded and formed into the rod-shaped particle of diameter 5mm;

[0029] (4) Roast the formed rod-shaped particles in a tube furnace at 750°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 material.

[0030] figure 1 The X-ray diffraction pattern of the Fe / C composite porous structure material powder prepared for this ex...

Embodiment 2

[0033] This embodiment prepares Fe / C composite porous structure material according to the following steps:

[0034] (1) Select a limonite ore sample with an iron grade of 40.31%, crush it and pass through a 0.1mm sieve to obtain limonite powder; crush rape straw and pass through a 1mm sieve to obtain straw powder;

[0035] (2) Weighing the limonite powder and straw powder according to the mass ratio of 1:5 and mixing them evenly to obtain the mixture;

[0036] (3) above-mentioned mixture is added in the hopper of screw extruder molding machine, extruded and formed into the rod-shaped particle of diameter 5mm;

[0037] (4) Roast the formed rod-shaped particles in a tube furnace at 650°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 material.

[0038] After XRD analysis, the results showed that the impurity quartz in the original sample remained unchanged, and the iro...

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Abstract

The invention discloses a method for preparing a Fe / C composite porous structure material by using limonite. The method is characterized in that the Fe / C composite porous structure material is obtained by using the limonite and biomass powder as raw materials, performing mixing and forming and then performing pyrolysis and reduction reaction under a reducing atmosphere, and the main phase of the material is biomass charcoal and zero-valent iron. The Fe / C composite porous structure material has high open porosity, high magnetic susceptibility, high adsorption and high biochemical activity, is a cheap biological carrier material having biological activity and adsorption performance, has a great application prospect in slightly polluted water purification and is especially suitable for simultaneous denitrification treatment of an eutrophic water body.

Description

1. Technical field [0001] The invention relates to the resource utilization of limonite ore and biomass, and belongs to the fields of mineral processing, biomass utilization and environmental engineering materials. 2. Background technology [0002] my country's limonite-type iron ore resources are abundant and widely distributed, with prospective reserves reaching 10 billion tons. Although the composition of limonite ore in different regions is very different, the common characteristics are: high gangue mineral content, many types, complex composition, and fine particles, mainly including illite, illite mixed layer minerals, quartz, calcite, Dolomite, chalcedony, etc.; goethite, the main mineral of iron, has fine and non-magnetic particles, and most of the minerals have a particle size of submicron or even nanometer, which makes beneficiation and processing difficult. So far, this type of iron ore has not been rationally utilized. How to make good use of this kind of minera...

Claims

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Application Information

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IPC IPC(8): B01J20/30B01J20/20B01J20/28
CPCB01J20/02B01J20/20B01J20/28009B01J20/28057B01J20/28069B01J2220/4806B01J2220/4825
Inventor 邹雪华陈天虎刘海波
Owner HEFEI UNIV OF TECH
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