A kind of fe/c composite porous structure material and its preparation method and application

Abstract

The invention discloses a Fe / C composite porous structure material as well as a preparation method and application thereof. The Fe / C composite porous structure material is characterized by being prepared from low-grade sedimentary iron ore and biomass as raw materials in manners of crushing, mixing, extrusion molding and pyrolysis and reduction reaction in the presence of hydrogen atmosphere at 650-900 DEG C, wherein the main phase composition comprises biomass carbon and zero-valent iron. The Fe / C composite porous structure material disclosed by the invention is high in opening porosity, magnetic susceptibility, adsorbability and biological chemical activity, can be used for treating eutrophicated river water, living sewage and landscape water bodies, or can be used for mediation of underground water pollution and polluted soil.

Description

[0001] 1. Technical field

[0002] The invention relates to low-grade iron ore and biomass resource utilization, and belongs to the fields of mineral processing, biomass utilization and environmental engineering materials.

[0003] 2. Background technology

[0004] my country is rich in iron ore resources, but the outstanding problem is that there are more lean ore and less rich ore. On the one hand, the ore raw materials of the iron and steel industry are heavily dependent on imports, and on the other hand, huge amounts of low-grade iron ore resources cannot be utilized. This type of low-grade iron ore includes oolitic hematite-type iron ore, siderite-type iron ore, and limonite-type iron ore. my country's prospective reserves are tens of billions of tons. Although the composition of different types of low-grade iron ore is very different, the common characteristics are: high content of gangue minerals, various types, complex composition, and fine particles, mainly including ...

Examples

Embodiment 1

[0043] In this example, first prepare the Fe / C composite porous structure material according to the following steps:

[0044] (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;

[0045] (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;

[0046] (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;

[0047] (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.

[0048] figure 1 The X-ray diffraction pattern of the Fe / C composite porous structure material powder prepared for...

Embodiment 2

[0052] In this example, first prepare the Fe / C composite porous structure material according to the following steps:

[0053] (1) crush siderite ore with an iron grade of 40.31%, and pass through a 0.1mm sieve to obtain siderite powder; crush rape straw and pass through a 1mm sieve to obtain straw powder;

[0054] (2) Weigh the deposited siderite powder and the straw powder according to the mass ratio of 1:5 and mix them evenly to obtain the mixture;

[0055] (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;

[0056] (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.

[0057] image 3 The X-ray diffraction pattern of the Fe / C composite porous structure material powder prepared for this exampl...

Embodiment 3

[0061] In this example, first prepare the Fe / C composite porous structure material according to the following steps:

[0062] (1) Crushing the oolitic hematite ore with an iron grade of 52.4% and passing it through a 0.1mm sieve to obtain oolitic hematite powder; crushing the rape straw and passing it through a 1mm sieve to obtain the straw powder;

[0063] (2) Weigh the oolitic hematite powder and the straw powder according to the mass ratio of 1:4 and mix them evenly to obtain the mixture;

[0064] (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;

[0065] (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.

[0066] Figure 5 The X-ray diffraction pattern of the Fe / C composite porous structu...

[0001] 1. Technical field

[0002] The invention relates to low-grade iron ore and biomass resource utilization, and belongs to the fields of mineral processing, biomass utilization and environmental engineering materials.

[0003] 2. Background technology

[0004] my country is rich in iron ore resources, but the outstanding problem is that there are more lean ore and less rich ore. On the one hand, the ore raw materials of the iron and steel industry are heavily dependent on imports, and on the other hand, huge amounts of low-grade iron ore resources cannot be utilized. This type of low-grade iron ore includes oolitic hematite-type iron ore, siderite-type iron ore, and limonite-type iron ore. my country's prospective reserves are tens of billions of tons. Although the composition of different types of low-grade iron ore is very different, the common characteristics are: high content of gangue minerals, various types, complex composition, and fine particles, mainly including ...

Examples

Embodiment 1

[0043] In this example, first prepare the Fe / C composite porous structure material according to the following steps:

[0044] (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;

[0045] (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;

[0046] (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;

[0047] (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.

[0048] figure 1 The X-ray diffraction pattern of the Fe / C composite porous structure material powder prepared for...

Embodiment 2

[0052] In this example, first prepare the Fe / C composite porous structure material according to the following steps:

[0053] (1) crush siderite ore with an iron grade of 40.31%, and pass through a 0.1mm sieve to obtain siderite powder; crush rape straw and pass through a 1mm sieve to obtain straw powder;

[0054] (2) Weigh the deposited siderite powder and the straw powder according to the mass ratio of 1:5 and mix them evenly to obtain the mixture;

[0055] (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;

[0056] (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.

[0057] image 3 The X-ray diffraction pattern of the Fe / C composite porous structure material powder prepared for this exampl...

Embodiment 3

[0061] In this example, first prepare the Fe / C composite porous structure material according to the following steps:

[0062] (1) Crushing the oolitic hematite ore with an iron grade of 52.4% and passing it through a 0.1mm sieve to obtain oolitic hematite powder; crushing the rape straw and passing it through a 1mm sieve to obtain the straw powder;

[0063] (2) Weigh the oolitic hematite powder and the straw powder according to the mass ratio of 1:4 and mix them evenly to obtain the mixture;

[0064] (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;

[0065] (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.

[0066] Figure 5 The X-ray diffraction pattern of the Fe / C composite porous structu...

Images