Method for preparing Fe/C composite material of porous structure by using sedimentary siderite

A porous structure and siderite technology, applied in chemical instruments and methods, water/sewage treatment, biological water/sewage treatment, etc., can solve the problems of low calorific value of liquid fuel, complex composition, carbon deposits in boilers, etc., to eliminate Tar, large pore volume, effect of improving particle strength

Active Publication Date: 2016-08-03
HEFEI UNIV OF TECH
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  • 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 material of porous structure by using sedimentary siderite
  • Method for preparing Fe/C composite material of porous structure by using sedimentary siderite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment prepares Fe / C composite porous structure material according to the following steps:

[0028] (1) crushing low-grade sedimentary siderite ore with an iron grade of 47.3% and passing through a 0.1mm sieve to obtain sedimentary siderite powder; crushing rapeseed straw and passing through a 1mm sieve to obtain straw powder;

[0029] (2) Weigh the deposited siderite powder and the straw powder according to the mass ratio of 1:3 and mix them evenly to obtain the mixture;

[0030] (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;

[0031] (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 material.

[0032] figure 1 The X-ray diffraction pattern of the Fe / C composite porous structure ma...

Embodiment 2

[0035] This embodiment prepares Fe / C composite porous structure material according to the following steps:

[0036] (1) Crushing the low-grade sedimentary siderite ore with an iron grade of 47.3% and passing through a 0.1mm sieve to obtain a sedimentary siderite powder; crushing sawdust from wood processing and passing through a 1mm sieve to obtain a biomass powder;

[0037] (2) Weigh the deposited siderite powder and the biomass powder according to the mass ratio of 1:5 and mix them evenly to obtain the mixture;

[0038] (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;

[0039] (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 material.

[0040] After XRD analysis, the results showed that the impurit...

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Abstract

The invention discloses a method for preparing a Fe/C composite material of a porous structure by using sedimentary siderite .The method is characterized in that the Fe/C composite material is obtained by using the low-grade sedimentary siderite and biomass powder as raw materials, performing mixing and forming and then performing pyrolysis and reduction reaction at the temperature of 650-900 DEG C under a reducing atmosphere, and the main phase of the material is biomass charcoal and zero-valent iron .The Fe/C composite material of the porous structure 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 low-grade siderite ore and biomass resource utilization, and belongs to the fields of mineral processing, biomass utilization and environmental engineering materials. 2. Background technology [0002] Siderite is a widely distributed carbonate mineral with a crystal chemical formula of FeCO 3 . Siderite ore is often mined as an associated ore in some metal mines. High-grade siderite is often roasted to obtain iron oxide for ironmaking, while low-grade siderite is usually not utilized and is often discarded as waste rock in ore mining, which not only occupies land, but also damages the environment. [0003] my country is rich in siderite resources and ranks among the top in the world, with proven reserves of 1.834 billion tons, accounting for 14% of the proven reserves of iron ore. Mainly distributed in Yunnan, Shaanxi, Gansu, Qinghai, Xinjiang, Anhui and so on. On the one hand, it is necessary to use economical and reaso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/20C02F1/28C02F3/10C02F3/28C02F3/34
CPCB01J20/02B01J20/20B01J20/28009B01J20/28054B01J20/28057B01J2220/42B01J2220/4806B01J2220/4825C02F1/281C02F2101/30Y02W10/10
Inventor 刘海波陈天虎邹雪华
Owner HEFEI UNIV OF TECH
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