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A device and method for simultaneous reduction of manganese-containing iron minerals by biomass pyrolysis

A biomass pyrolysis and biomass technology, which is applied in the fields of biofuel, process efficiency improvement, coke oven, etc., can solve the problems of high heat loss, narrow application area, complicated equipment connection, etc., and achieve high reduction efficiency and material saving. and time cost effects

Active Publication Date: 2021-08-27
UNIV OF SCI & TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this patent realizes the combination of roasting process and reduction process, iron ore is reduced under fluidization, which improves the roasting reduction efficiency, but the mineral preheating needs to add fuel coal, and the reducing gas needs to be added separately
The material is preheated through two-stage cyclone separation. The harmful components in the flue gas have a certain impact on the properties of the material, and the heat loss is more
Coal combustion and material reduction are not completed in one device, the equipment connection is complicated, the reaction process is not easy to control, and the generated flue gas needs a separate purification device
[0007] To sum up the above, the manganese ore roasting device that has been disclosed now only makes corresponding improvements to the roasting process, and does not combine processes such as biomass pyrolysis, ore roasting, ore reduction or oxidation. Other ore roasting devices disclosed are suitable for The area is narrow, and at the same time, it will cause certain environmental pollution problems, and it has not achieved clean, fast, and multi-level energy utilization.
The deep sea is rich in iron and manganese resources. The most critical step in utilizing deep sea iron and manganese resources is to reduce iron and manganese minerals. Biomass is an important clean energy, but its utilization rate is very low at present. Roasting device and method for ore reduction and multi-stage utilization of biomass energy gradient

Method used

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  • A device and method for simultaneous reduction of manganese-containing iron minerals by biomass pyrolysis
  • A device and method for simultaneous reduction of manganese-containing iron minerals by biomass pyrolysis
  • A device and method for simultaneous reduction of manganese-containing iron minerals by biomass pyrolysis

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] like figure 1 As shown, a device for synchronous reduction of manganese-containing iron minerals by biomass pyrolysis, the device includes a furnace body 1, a pyrolysis pipe 2, a discharge pipe 4, a vertical circulation pipe 7, a material circulation pipe 10, a pyrolysis Reduction pipe 13, biomass preheating pipe 16;

[0055] Pyrolysis pipe 2 and pyrolysis reduction pipe 13 are arranged inside described furnace body 1, and pyrolysis reduction pipe 13 is sleeved in pyrolysis pipe 2; The inlet of pyrolysis pipe 2 is connected with the outlet of biomass preheating pipe 16, and the thermal The outlet of the decomposition pipe 2 is connected with the inlet of the pyrolysis induced draft fan 6, the outlet of the pyrolysis induced draft fan 6 is connected with the inlet of the vertical circulation pipe 7, the outlet of the vertical circulation pipe 7 is connected with the inlet of the pyrolysis reduction pipe 13, and the thermal The outlet of the decomposing reduction pipe 13...

Embodiment 2

[0065] like figure 1 As shown, a device and method for synchronously reducing deep-sea manganese oxide minerals by pyrolysis of biomass. The affiliated device includes a furnace body 1, and a pyrolysis tube 2 and a pyrolysis reduction tube 13 are arranged in the inner space of the furnace body; a biomass feed port 11 is provided on the right side of the furnace body, and a biomass feed port 11 is provided at the lower end of the biomass feed port 11. The material delivery mechanism 12, the biomass delivery mechanism 12 is connected with the pyrolysis pipe 2; the pyrolysis pipe 2 is connected with the vertical circulation pipe 7 outside the furnace body, and the left side of the vertical circulation pipe 7 is connected with the mineral feed for adding deep-sea manganese oxide minerals The port 8 is connected; the pyrolysis reduction pipe 13 is connected with the discharge pipe 4, the discharge pipe 4 is connected with the first-stage cyclone separator 14, and the first-stage cy...

Embodiment 3

[0080] Adopt the device described in embodiment 1 to carry out mineral reduction, the biomass and mineral that adopt are specific as follows:

[0081] Seaweed elemental analysis result is as follows table (wt%)

[0082]

[0083] Manganese nodule chemical composition analysis result is as follows table (wt%)

[0084]

[0085] Adjust the temperature of the pyrolysis furnace to 800°C. Seaweed (particle size <50mm) is fed through the feed port of the material preheating tube. It is continuously preheated during the screw propulsion process. The preheating temperature is 400°C. After entering the pyrolysis tube of the pyrolysis reduction furnace , under the action of the induced draft fan, it moves upwards and pyrolyzes for 3 minutes at the same time. The manganese nodules (particle size <0.5mm) are mixed with the pyrolysis products of seaweed through the left side of the furnace body, and then enter the pyrolysis tube in the furnace body for roasting and reduction. 4min, th...

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Abstract

The invention belongs to the technical field of mineral reduction, in particular to a device and method for synchronously reducing manganese-containing iron minerals by pyrolysis of biomass. In the device, a pyrolysis tube and a pyrolysis reduction tube are arranged in the furnace body, and the pyrolysis reduction tube is set in the pyrolysis tube; biomass preheating tube, pyrolysis tube, pyrolysis induced draft fan, vertical circulation tube, pyrolysis The reduction pipe, the discharge pipe, the first-stage cyclone separator, the second-stage cyclone separator, and the material circulation pipe are sequentially connected with the inner space of the furnace body; the biomass preheating pipe is equipped with a biomass conveying mechanism, which is connected with the biomass The material feeding port is connected; the vertical circulation pipe is also connected with the outlet of the mineral conveying mechanism, and the inlet of the mineral conveying mechanism is connected with the mineral feeding port. The invention can make full use of biomass pyrolysis products to reduce the manganese oxide minerals on the seabed, and regulate the environmental parameters of the pyrolytic reduction manganese oxide minerals according to the properties of the minerals. The reduction product has a high recovery rate and is graded, which saves material and time costs for subsequent processing.

Description

technical field [0001] The invention belongs to the technical field of deep-sea manganese oxide mineral reduction, and discloses a device and method for synchronously reducing manganese-containing iron minerals (especially deep-sea manganese oxide minerals) by biomass pyrolysis. Background technique [0002] With the development of society, due to the consumption of fossil resources and the deterioration of the environment, the whole world is facing an energy crisis and an environmental crisis. Therefore, it is very important to find a new renewable and environmentally friendly alternative energy source. Biomass is an inexhaustible renewable resource. The annual global biomass production exceeds 100 billion tons. Even if the biomass available for energy development and utilization does not exceed 1% of the total, biomass energy is still It has become the fourth largest energy consumption after coal, oil and natural gas, and strengthening the use of biomass energy can improv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B53/02C22B5/10C22B47/00C22B7/04C22B15/00
CPCC10B53/02C22B5/10C22B7/007C22B7/04C22B15/0071C22B23/043C22B47/00Y02E50/10Y02P10/20
Inventor 冯雅丽巨金荣
Owner UNIV OF SCI & TECH BEIJING
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