Device for reducing iron-containing minerals from biomass
By designing a device for reducing iron-containing minerals in the steel industry, using the combination technology of spiral feed rods and carbon-silicon heating rods, the problems of high energy consumption and serious pollution in the existing technology are solved, and low-temperature and high-speed reduction and High-efficiency energy utilization supports the realization of carbon neutrality goals.
Patent Information
- Application Number
- CN202420429682.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-06
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-03-06
AI Technical Summary
The reduction and roasting process used in the steel industry in the prior art has problems such as high energy consumption, serious pollution, low reduction rate, uneven material reduction and insufficient utilization of reducing agents, making it difficult to pyrolyze biomass with iron-containing minerals. The combination of magnetization and calcination affects the realization of carbon neutrality and carbon peak goals.
A device for reducing iron-containing minerals by biomass is designed, using a spiral feed rod and a carbon-silicon heating rod. The residence time and temperature distribution of materials in the furnace are regulated through the motor and the transmission, and combined with a wind classifier to improve the reduction efficiency and Energy utilization rate.
It achieves the reduction temperature, the reduction rate, and the environmentally friendly effect, and makes full use of biomass, reducing production costs and improving energy utilization.
Smart Images
Figure CN222226491U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of reduction roasting of iron-containing minerals, in particular to a device for reducing iron-containing minerals by biomass. Background Art
[0002] With the rapid development of globalization, the consumption of traditional fossil energy is increasing, leading to the global energy crisis and environmental crisis. The steel industry is a major industry that consumes traditional fossil energy and is also an industry with high carbon dioxide emissions. Therefore, seeking a renewable resource that can replace traditional fossil energy for use in the steel industry is crucial for my country to achieve "carbon neutrality" and "carbon peak". Biomass energy is the fourth largest energy consumption after coal, oil, and natural gas. It is also considered to be the only renewable resource that can replace traditional fossil energy. In addition, the use of biomass energy does not cause net greenhouse gas emissions and is a clean energy.
[0003] Reduction roasting technology is widely used in the processing and utilization of iron-containing minerals. It reduces iron oxide to metallic iron at a higher temperature (above 900°C), or reduces iron oxide to magnetite at medium and low temperatures (600~900°C), and then recovers iron through magnetic separation. However, coke or anthracite is usually used as a reducing agent, which has high energy consumption, slow reduction rate, and produces a large amount of greenhouse gases, which is not conducive to achieving the "carbon neutrality" and "carbon peak" goals proposed by my country. There are also studies using hydrogen or natural gas as a reducing agent, but its cost is high and it also produces carbon dioxide. At present, biomass pyrolysis and magnetic roasting of iron-containing minerals have not been combined, and the existing reduction roasting devices and technologies have problems such as high energy consumption, serious pollution problems, low reduction rate, uneven material reduction, and insufficient utilization of reducing agents. Therefore, it is of great practical significance to study the device and method for biomass reduction of iron-containing minerals. Summary of the invention
[0004] The utility model aims to solve the above problems and provides a device for reducing iron-containing minerals with biomass, which can make full use of biomass energy and has the advantages of low reduction temperature, fast reduction rate, environmental friendliness and high energy utilization rate.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a device for reducing iron-containing minerals by biomass, comprising a roasting furnace installed on a platform, a feed port is arranged above one side of the roasting furnace, and a discharge port is arranged below the other side, a spiral feeding rod passing through both sides of the roasting furnace is arranged in the roasting furnace, and both sides of the spiral feeding rod are respectively fixed in bearings arranged on both sides of the roasting furnace, one end of the spiral feeding rod is connected to a motor arranged outside the same side of the roasting furnace, and the other end of the spiral feeding rod is fixedly connected to a driven wheel arranged on the platform for supporting the spiral feeding rod, and a wind classification feed port is arranged below the discharge port, the wind classification feed port is connected to an induced draft fan, the induced draft fan is connected to a material conveying pipe, and is connected to a wind classifier through the material conveying pipe.
[0006] The technical solution further defined in the utility model is:
[0007] Preferably, a gearbox is provided between the motor and the screw feeding rod, the motor is connected to the gearbox, and the gearbox is connected to the screw feeding rod. Driven by the motor and the action of the gearbox, the rotation speed of the screw feeding rod can be driven and controlled, thereby regulating the reduction time of the material in the furnace.
[0008] Preferably, a plurality of carbon silicon heating rods are evenly arranged on the inner wall of the roasting furnace. Preferably, the plurality of carbon silicon heating rods are all arranged on the inner wall of the upper end of the roasting furnace to make the temperature in the furnace more uniform. Preferably, a control box is also included, and the control box is electrically connected to the motor, the gearbox, the induced draft fan, the carbon silicon heating rods and the wind classifier through wires.
[0009] Compared with the prior art, the utility model has the following beneficial effects: the utility model arranges a spiral feeding rod so that iron-containing minerals and biomass reducing agents can move forward in the furnace, and the residence time of the materials in the furnace can be adjusted by controlling the motor and the gearbox; the silicon carbon rods are evenly distributed in the upper half of the furnace body, so that the heating of the furnace is more uniform; a plurality of silicon carbon rods are controlled by a control switch in the control box, and can be turned on or off according to the temperature distribution in the furnace, thereby more accurately controlling the temperature in the furnace; after reduction, unused biochar can be obtained through wind classification, which can be directly used or sold as a product, thereby making full use of biomass while reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a schematic diagram of the structure of the utility model;
[0011] Figure 2 It is a cross-sectional view of the internal structure of the roasting furnace of the utility model.
[0012] In the figure: 1. control box; 2. motor; 3. gearbox; 4. feed port; 5. furnace body; 6. spiral feed rod; 7. silicon carbon rod; 8. driven wheel; 9. discharge port; 10. wind classification feed port; 11. induced draft fan; 12. material conveying pipe; 13. wind classifier; 14. bearing. DETAILED DESCRIPTION Example
[0013] like Figure 1-2 As shown, this embodiment provides a device for reducing iron-containing minerals by biomass, including a roasting furnace 5 installed on a platform and a control box 1, a feed port 4 is arranged on the upper left side of the roasting furnace 5, a discharge port 9 is arranged on the lower right side, a spiral feeding rod 6 is arranged in the roasting furnace to pass through both sides thereof, and both sides of the spiral feeding rod 6 are respectively fixed in bearings 14 arranged on both sides of the roasting furnace, one end of the spiral feeding rod 6 is connected to a gearbox arranged on the outside of the same side of the roasting furnace, and the gearbox is connected to a motor arranged on one side, and the other end of the spiral feeding rod is fixedly connected to a driven wheel 8 arranged on the platform for supporting the spiral feeding rod, and a wind classification feed port 10 is arranged below the discharge port 9, and the wind classification feed port is connected to an induced draft fan 11, under the action of the induced draft fan, the material can be introduced into the wind classifier by wind, and at the same time, by controlling the effect of the induced draft fan, the initial velocity of the material entering the wind classifier can be adjusted, thereby adjusting the classification specific gravity;
[0014] The induced draft fan is connected to the material conveying pipe 12, and is connected to the wind classifier 13 through the material conveying pipe; 5 carbon silicon heating rods 7 are evenly arranged on the inner wall of the roasting furnace, and are all arranged on the inner wall of the upper end of the roasting furnace. The control box 1 is electrically connected to the motor 2, the gearbox 3, the induced draft fan 11, the carbon silicon heating rod 7 and the wind classifier 13 through electric wires.
[0015] There is a certain gap between the discharge port at the lower right side of the roasting furnace in this embodiment and the feed port of the wind classification. The material first enters the feed port of the wind classification under the action of gravity, and then is transported to the wind classifier under the action of the induced draft fan. The reduced iron-containing minerals and biomass pyrolysis are obtained through classification to produce unused biochar. The left side of the spiral feed rod inside the roasting furnace is connected to the gearbox, and the gearbox is connected to the motor. Under the drive of the motor and the action of the gearbox, the rotation speed of the spiral feed rod can be driven and controlled, thereby regulating the reduction time of the material in the furnace; the two ends of the spiral feed rod are tightly connected to the two sides of the furnace body through bearings. Therefore, under the action of the motor and the gearbox, the spiral feed rod can rotate evenly in the middle of the furnace body.
[0016] The principle of the utility model is as follows: iron-containing minerals and biomass are mixed and then added into the roasting furnace through the feed port, and driven by the motor and the gearbox to drive the spiral feed rod to rotate, and at the same time push the material to move forward inside the furnace body, and the carbon silicon rod is controlled by the control switch of the control box (1) to heat, and the rotation speed of the spiral feed rod is determined according to the required reduction time, and the material in the furnace is transported to the right side of the furnace body and discharged through the discharge port, and enters the feed port of the wind classification under the action of gravity, and then enters the wind classifier under the action of the induced draft fan, and obtains the reduction product and unused biochar through the wind classifier.
[0017] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0018] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A device for reducing iron-containing minerals by biomass, comprising a roasting furnace installed on a platform, characterized in that: A feed port is provided above one side of the roasting furnace, and a discharge port is provided below the other side. A spiral feeding rod penetrating both sides of the roasting furnace is provided in the roasting furnace, and both sides of the spiral feeding rod are respectively fixed in bearings provided on both sides of the roasting furnace, one end of the spiral feeding rod is connected to a motor provided on the outside of the roasting furnace on the same side, and the other end of the spiral feeding rod is fixedly connected to a driven wheel provided on a platform for supporting the spiral feeding rod, and a wind classification feed port is provided below the discharge port, the wind classification feed port is connected to an induced draft fan, the induced draft fan is connected to a material conveying pipe, and is connected to a wind classifier through the material conveying pipe.
2. The device for reducing iron-containing minerals by biomass according to claim 1, characterized in that: A gearbox is arranged between the motor and the screw feeding rod, the motor is connected to the gearbox, and the gearbox is connected to the screw feeding rod.
3. The device for reducing iron-containing minerals by biomass according to claim 2, characterized in that: A plurality of carbon silicon heating rods are evenly arranged on the inner wall of the roasting furnace.
4. The device for reducing iron-containing minerals by biomass according to claim 3, characterized in that: A plurality of carbon silicon heating rods are arranged on the inner wall of the upper end of the roasting furnace.
5. The device for reducing iron-containing minerals by biomass according to claim 4, characterized in that: It also includes a control box, which is electrically connected to the motor, the gearbox, the induced draft fan, the carbon silicon heating rod and the wind classifier through electric wires.