Metallurgy solid waste treatment system based on regional material distribution and production control method

Abstract

The invention discloses a metallurgical solid waste treatment system based on regional distribution and a production control method, which are characterized in that the distribution position of metallurgical solid waste pellets is adjusted in real time by detecting furnace top conditions through technical means according to the reduction thermodynamic and dynamic conditions of the metallurgical solid waste pellets and combining the technical indexes of hydrogen-rich blast furnace smelting; and finally resource utilization of the metallurgical solid waste raw material is realized.

Description

Technical Field

[0001] The present invention relates to the field of resource recovery and utilization of multi-component complex metallurgical materials and low-carbon smelting of hydrogen-rich blast furnaces in the iron and steel metallurgy process, and particularly to a multi-component complex metallurgical solid waste treatment system and a production control method for regional burden distribution coupled with hydrogen-rich smelting. Background Art

[0002] A large amount of solid waste is generated in the iron and steel manufacturing process, including environmental dust, sintering sludge, blast furnace gas ash, blast furnace dust, converter dust, rolling mill dust, scale, zinc-bearing iron ore, fly ash from waste incineration, etc. These solid wastes are characterized by low iron content and high contents of elements such as lead, zinc, potassium, and sodium. Currently, the rotary hearth furnace and rotary kiln processes are usually used to pre-remove elements such as lead, zinc, potassium, and sodium. The process energy consumption is greater than 400 kgce / t, and the treated slag is recycled into the sintering process. There are also cases where multi-component complex metallurgical solid wastes are made into oxidizing pellets and directly fed into the blast furnace process. However, there are also problems such as high energy consumption and large carbon emissions. At the same time, elements such as lead, zinc, potassium, and sodium that are not removed are more likely to cause problems such as blast furnace accretion and difficult smooth operation. To ensure smooth charging of the blast furnace and improve smelting technical indicators, most current blast furnaces adopt the form of uniform burden distribution, that is, a bell-less top burden distribution system is used to evenly distribute the smelting materials at various positions of the furnace mouth. However, the problem with this method when dealing with multi-component complex metallurgical solid wastes is that, taking the Zn element as an example, there will be a part of oxidizing or zinc ferrite remaining in the multi-component complex metallurgical solid waste pellets after pre-reduction process treatment. Uniform burden distribution will cause a part of the multi-component complex metallurgical solid waste pellets to always be in the relatively low-temperature edge area. When the pellets reach the relatively high-temperature hearth position, reduction occurs. Since the melting and boiling points of Zn are both lower than 1000 °C, this will cause this part of the Zn element to circulate and accumulate in the blast furnace to form accretion, affecting the smooth operation of the burden and thus reducing the blast furnace smelting technical indicators.

[0003] Therefore, based on the existing equipment and technology conditions of the blast furnace process, how to achieve classified and stepwise efficient recovery of metal elements in multi-component complex metallurgical solid wastes and solve the problems of high energy consumption, large carbon emissions, and easy blast furnace accretion and difficult smooth operation when the existing blast furnace processes multi-component complex metallurgical solid wastes is a key technical problem urgently needed to be solved in the current iron and steel metallurgy field. Summary of the Invention

[0004] To achieve the above object, the present invention first provides a metallurgical solid waste treatment system based on regional burden distribution, including a blast furnace top burden distribution subsystem, a top temperature distribution detection subsystem, an on-line analysis subsystem for blast furnace top gas composition, a hydrogen injection subsystem, and a control subsystem; wherein:

[0005] The burden distribution subsystem includes a loading drive device, a top charging hopper, a reversing chute, a triple bin charging tank, a throttle valve, a central throat pipe, and a rotary chute; the bell-less top burden distribution system is located at the upper end of the blast furnace body, and the lower end of the feed pipe is fixedly connected to the top of the blast furnace. The rotary chute can distribute the burden to any position of the entire top cross-section of the blast furnace; the triple bin charging tank is divided into a coke bin, an ore bin, and a multi-component complex metallurgical solid waste bin. The burden distribution subsystem is configured to alternately charge the multi-component complex metallurgical solid waste and the conventional production ore into the furnace for smelting;

[0006] The top thermal imaging detection subsystem includes a furnace body mounting part, a high-temperature infrared lens, a high-definition dedicated thermal imager, a camera gun body, a water cooling device, a lens purging device, a lens scraping device, a high-temperature electric isolation device, an automatic entry / exit mechanism, a temperature sensor, and a pressure sensor;

[0007] The top gas composition content detection subsystem includes a gas sampling gun, a water cooling device, a real-time gas analyzer, a gas control valve group, an axial distributor, and a pipeline stop valve;

[0008] The hydrogen injection subsystem includes static pressure detectors at multiple layers and multiple positions on the furnace body, and injection layers and hydrogen nozzles corresponding to the static pressure detectors;

[0009] The control subsystem is configured to control the burden distribution position of the burden distribution subsystem and simultaneously control the hydrogen-rich injection of the hydrogen injection subsystem.

[0010] Furthermore, in the burden distribution subsystem, the distribution angle of the rotary chute continuously changes in the range from 10 degrees to 45 degrees counterclockwise from the vertical direction, and the maximum rotation angle of 45 degrees can distribute the burden to the outermost circle of the top cross-section of the blast furnace.

[0011] Furthermore, in the burden distribution subsystem, the triple bin charging tank is divided into a coke bin, an ore bin, and a multi-component complex metallurgical bin.

[0012] Furthermore, the blast furnace top thermal imaging detection subsystem is configured to detect the temperature distribution of the top cross-section of the blast furnace:

[0013] (2-1) Take a cross-sectional view of the blast furnace top position. Draw n concentric circles with radii in arithmetic progression through the center of the cross-section. The largest concentric circle coincides with the inner circle of the blast furnace top. Denote the smallest concentric circle as the first circle, that is, i = 1, 2, 3...n, thus dividing the entire top cross-section of the blast furnace into several concentric circle regions;

[0014] (2-2) Determine the temperature distribution of a certain concentric circle i at the top cross-section position of the blast furnace, denoted as T i , and use an infrared thermal imager to perform thermal imaging detection on the entire top cross-section of the blast furnace to obtain a cross-sectional temperature distribution map, and denote the center point temperature as T0.

[0015] Furthermore, the on-line analysis subsystem for top gas composition is configured to detect the content of the blast furnace top gas components:

[0016] Denote the gas phase component content index of a concentric circle i at the top section as G i , and the mass fraction of CO in the concentric circle i detected by the on-line analysis system for top gas composition is The mass fraction of H2 is The mass fraction of CO2 is The mass fraction of H2O is Thus, the gas phase component content index G of this area i is calculated as follows:

[0017]

[0018] Furthermore, in the hydrogen injection subsystem, the static pressure monitoring subsystem of the furnace body includes m monitoring layers evenly distributed along the axial direction of the furnace body, where each layer is i = 1, 2... m; each layer includes n monitoring points evenly distributed along the circumferential direction of the furnace body, where each point is j = 1, 2... n; the hydrogen injection subsystem also includes m injection layers corresponding to each monitoring layer in position, and each injection layer includes n nozzles corresponding to the positions of each monitoring point.

[0019] Furthermore, in the control subsystem, the calculation model for selecting the optimal burden distribution position based on the content of multi-component complex metallurgical solid waste is constructed as follows:

[0020] (5-1) Draw the temperature distribution curve and gas phase composition distribution curve in the blast furnace;

[0021] (5-2) Develop a map of the advantageous area for the burden distribution of multi-component complex metallurgical solid waste pellets;

[0022] (5-3) Obtain the component content W of the multi-component complex metallurgical solid waste pellets;

[0023] (5-4) Input the concentric circle layer number i = 1, the temperature T corresponding to this layer i and the gas component content index G i ;

[0024] (5-5) According to the advantageous area map, select the optimal reducing gas component content index corresponding to the temperature T of this layer i (5-6) Judge the magnitude relationship between the measured value G of the gas component content index in this area and, when (5-6) Judge the magnitude relationship between the measured value G of the gas component content index in this area and, when i and, when , then it is judged that this area is the burden distribution area of the metallurgical solid waste pellets, when If so, it is determined that this area is the conventional material cloth area; (5-7) Return to (5-4), and at the same time increment the concentric circle layer number i by 1, and repeat steps (4) to (6). When i increases to n, the next input starts from i = 0.

[0025] The present invention also provides a production control method carried out on a metallurgical solid waste treatment system based on area cloth, including steps:

[0026] (6-1) Provide a metallurgical solid waste treatment system based on area cloth as described above;

[0027] (6-2) Draw a temperature distribution curve and a gas composition distribution curve in the blast furnace;

[0028] (6-3) Develop a map of the advantageous areas for the cloth of the multi-component complex metallurgical solid waste pellets in the blast furnace;

[0029] (6-4) Obtain the component content W of the multi-component complex metallurgical solid waste pellets in the blast furnace;

[0030] (6-5) Input the concentric circle layer number i = 1, the temperature T corresponding to this layer i and the gas component content index G i ;

[0031] (6-6) According to the advantageous area map of the blast furnace, select the optimal reducing gas component content index corresponding to the temperature T of this layer i corresponding to

[0032] (6-7) Judge the magnitude relationship between the measured value G of the gas component content index in this area and, when i When, it is determined that this area is the cloth area of the metallurgical solid waste pellets, and when When, it is determined that this area is the conventional material cloth area; If so, it is determined that this area is the conventional material cloth area;

[0033] (6-8) The control subsystem controls the cloth system to carry out cloth.

[0034] Furthermore, the metallurgical solid waste is pellets including environmental dust removal ash, sintering dust sludge, blast furnace gas ash, blast furnace dust removal ash, converter dust, rolling mill dust, scale, zinc-containing iron ore or waste incineration fly ash components.

[0035] Furthermore, the target blast furnace injects hydrogen, and the hydrogen is produced by electrolysis, and the electric energy for electrolysis comes from green electricity and valley electricity.

[0036] Furthermore, the electric energy used in the whole process comes from gas power generation, steam surplus pressure power generation, solar power generation, wind power generation, nuclear power generation and grid valley-time electric energy.

[0037] Furthermore, the produced high-quality low-carbon hot metal / pig iron will enter subsequent smelting equipment such as converters and electric furnaces for the manufacture of high-quality steel products or components.

[0038] Furthermore, the produced zinc-containing dust is treated by leaching with an acidic solution to precipitate and filter out impurity components, and then ultra-high-purity Zn plates are obtained by electrolysis.

[0039] The present invention discloses a metallurgical solid waste high-efficiency treatment system and production control method for regional burden distribution coupled with hydrogen-rich smelting. According to the reduction thermodynamics and kinetics conditions of metallurgical solid waste pellets, combined with the technical indicators of hydrogen-rich blast furnace smelting, the burden position of metallurgical solid waste pellets is adjusted in real time by technical means to detect the furnace top conditions, and finally the resource utilization of metallurgical solid waste raw materials is realized. At the same time, the pellets are smelted in a hydrogen-rich blast furnace, which can not only reduce the pain points of high energy consumption and large carbon emissions in the process of treating solid waste raw materials, but also contribute to the development of hydrogen-rich and low-carbon ironmaking technology in blast furnaces, achieve significant low-carbonization of blast furnace ironmaking, lay a theoretical and technical foundation for the steel industry to further significantly reduce CO2 emissions and realize green manufacturing, realize the full-process cycle of smelting materials, and establish a sustainable low-carbon development route.

[0040] The following will further illustrate the concept, specific structure and technical effects of the present invention with reference to the accompanying drawings to fully understand the purpose, features and effects of the present invention. Description of the Drawings

[0041] Figure 1 is a schematic diagram of the system for regional burden distribution coupled with hydrogen-rich smelting in a preferred embodiment of the present invention;

[0042] Figure 2 is a schematic diagram of the concentric circle division area of the furnace top cross-section;

[0043] Figure 3 is a distribution diagram of the temperature and gas phase composition in a hydrogen-rich blast furnace;

[0044] Figure 4 is a diagram of the advantageous area for distributing multi-component complex metallurgical solid waste pellets;

[0045] Figure 5 is a schematic diagram of the judgment and execution program in the control subsystem.

[0046] Reference Signs:

[0047] 1 - Control Subsystem;

[0048] 2 - Tri-merged Hopper Blast Furnace Burden Distribution System;

[0049] 3 - Hot Imaging Detection Subsystem for Blast Furnace Top;

[0050] 4 - On-line Detection Subsystem for Composition of Top Gas;

[0051] 5 - Hydrogen injection subsystem;

[0052] 6 - Blast furnace body. Detailed implementation manners

[0053] The following introduces multiple preferred embodiments of the present invention with reference to the accompanying drawings of the specification, making its technical content clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the protection scope of the present invention is not limited to the embodiments mentioned in the text.

[0054] The present invention provides a multi - component complex metallurgical solid waste treatment system and production control method for regional burden distribution coupled with hydrogen - rich smelting. During the blast furnace smelting process, hydrogen - rich gas is injected. Selecting hydrogen as the reducing gas has obvious advantages: 1) Hydrogen has a high calorific value and good thermal conductivity, which can accelerate the heat exchange between multi - component complex metallurgical solid waste and gas, improving the utilization of thermal energy; 2) Hydrogen has a small density and strong diffusion ability, which can improve the kinetic conditions in the reduction process of multi - component complex metallurgical solid waste; 3) The reduction product of hydrogen is water. Replacing coal with hydrogen can not only achieve energy conservation and consumption reduction, but also reduce pollution and carbon emissions during the production process.

[0055] Based on the contents of lead, zinc, potassium, and sodium in multi - component complex metallurgical solid waste, through the combination of detailed laboratory experimental simulations and accurate on - site measurement data, the present invention determines the burden distribution advantageous area diagram of multi - component complex metallurgical solid waste (see Figure 4 , that is, the function relationship diagram of the burden temperature area and the burden gas composition distribution area). That is, under the condition of determining the contents of lead, zinc, potassium, and sodium, the multi - component complex metallurgical solid waste pellets are burdened to the optimal top - of - furnace temperature T i and the optimal top - of - furnace gas composition content index . At this time, the thermodynamic and kinetic conditions are optimal during the subsequent reduction process; the temperature and gas composition in the top - of - furnace area are detected in real time, and the multi - component complex metallurgical solid waste pellets are burdened to the designated position. The efficient and low - energy - consumption smelting separation of lead, zinc, potassium, and sodium in multi - component complex metallurgical solid waste based on blast furnace smelting technology and equipment is realized.

[0056] As Figure 1 shown, the multi - component complex iron and steel metallurgical solid waste treatment system of the present invention includes a hydrogen - rich blast furnace top bell - less 12502, a top - of - furnace thermal imaging detection subsystem 3, a top - of - furnace gas composition on - line detection subsystem 4, a hydrogen injection subsystem 5, and a control subsystem 1.

[0057] The hydrogen - rich blast furnace top bell - less 12502 includes a charging drive device, a top - of - furnace receiving hopper, a reversing chute, a triple - combined charging tank, a throttle valve, a central throat pipe, and a rotary chute. The top - of - furnace bell - less burden distribution system is located at the upper end of the blast furnace body, and the lower end of the feeding pipeline is fixedly connected to the top of the blast furnace. Among them:

[0058] (1) The feeding angle of the rotating chute can be continuously changed from 10 degrees to 45 degrees counterclockwise in the vertical direction. The maximum rotation angle of 45 degrees can feed the outermost circle of the furnace top cross section;

[0059] (2) The three-tank loading tank is divided into a coke tank, an ore tank and a multi-component complex metallurgical material tank. During production, multi-component complex metallurgical solid waste pellets and conventional production ore are alternately fed into the furnace for smelting.

[0060] The blast furnace top thermal imaging detection subsystem 3 includes a furnace body mounting part, a high-temperature infrared lens, a high-definition dedicated thermal imager, a camera gun body, a water cooling device, a lens blowing device, a lens scraping device, a high-temperature electric isolation device, an automatic entry / exit mechanism, a temperature sensor, and a pressure sensor, wherein:

[0061] (1) Take the cross-sectional view of the blast furnace roof, and make n concentric circles with equidistant radii through the center of the cross-sectional circle. The largest concentric circle coincides with the inner circle of the blast furnace roof, and the smallest concentric circle is recorded as the first circle, that is, i = 1, 2, 3 ... n. The entire roof cross-section can be divided into several concentric circle areas. Based on detailed blast furnace numerical simulation and accurate field measurement data, it is determined that the temperature distribution of the blast furnace roof cross-section presents a typical concentric circle feature, see Figure 2 ;

[0062] (2) Determine the temperature distribution of a concentric circle i at the cross-sectional position of the furnace top, denoted as T i , use an infrared thermal imager to perform thermal imaging detection on the entire furnace top cross section to obtain the cross-sectional temperature distribution diagram, and record the center point temperature as T0.

[0063] The furnace top gas composition online detection subsystem 4 includes a gas sampling gun, a water cooling device, a real-time gas analyzer, a gas control valve group, an axial distributor, and a pipeline stop valve, wherein:

[0064] The gas phase content index of a concentric circle i on the furnace top section is marked as G i The CO mass fraction of the concentric circle i detected by gas chromatograph is The mass fraction of H2 is The mass fraction of CO2 is The mass fraction of H2O is Therefore, the gas phase content index G i The calculation of is as follows:

[0065]

[0066] The hydrogen injection subsystem 5 includes static pressure detectors at multiple positions in multiple layers of the furnace shaft, a blowing layer corresponding to the positions of the detectors, and hydrogen nozzles. Specifically, the static pressure monitoring subsystem of the furnace shaft includes m monitoring layers evenly distributed along the axial direction of the furnace shaft, with each layer being i = 1, 2... m; each layer includes n monitoring points evenly distributed along the circumferential direction of the furnace shaft, with each point being j = 1, 2... n; the hydrogen injection subsystem also includes m blowing layers corresponding to the positions of the monitoring layers, and the blowing layer includes n nozzles corresponding to the positions of the monitoring points; the control subsystem 1 controls the burden distribution position of 1250, and at the same time controls the hydrogen injection subsystem to perform hydrogen-rich injection.

[0067] The calculation model for selecting the optimal burden distribution position in the control subsystem 1 based on the content of multi-component complex metallurgical solid waste is as follows:

[0068] (1) Draw the temperature distribution curve and gas phase composition distribution curve in the blast furnace. In a hydrogen-rich blast furnace, the first gas-solid coupling reaction process to occur is the melting loss reaction, which are the carbon gasification reaction of carbon with CO2 and the complete and incomplete combustion reactions of carbon with H2O, and the thermodynamic reaction temperatures are 978K, 924K, and 942K respectively. As the reaction temperature increases, after the reaction temperature is higher than 1138K, the reaction of coke with water vapor is the main one. Therefore, it is necessary to calculate the reaction process of multi-component complex metallurgical solid waste in the CO / H2 coupling gas-solid system. Multi-component complex metallurgical solid waste contains various metal oxides (such as Pb, Zn, K, Na, etc.), which are reduced by the mixed atmosphere of CO / H2 in the blast furnace, and the reduction equations are as follows:

[0069] M x O (s) +CO (g) =xM (s) +CO 2(g)

[0070] M x O (s) +H 2(g) =xM (s) +H2O (g)

[0071] Thus, draw the temperature distribution curve and gas phase composition distribution curve in the hydrogen-rich blast furnace as shown in Figure 3 the figure. It can be seen from the isotherms in the hydrogen-rich blast furnace that if the burden is distributed from different positions at the furnace top, the materials will reach the corresponding reaction temperatures at different positions in the blast furnace. The CO + H2 contents corresponding to different temperatures also have significant differences. Therefore, selecting the higher CO + H2 content corresponding to the higher temperature can further improve the reduction efficiency of multi-component complex metallurgical solid waste.

[0072] (2) Calculate and construct the optimal burdening position model based on the lead, zinc, potassium, and sodium contents in the multi-component complex metallurgical solid waste, and formulate the map of the advantageous burdening area for the multi-component complex metallurgical solid waste pellets. From the temperature distribution curve and the gas composition distribution curve map in the hydrogen-rich blast furnace, it can be seen that there is a functional relationship between the burdening temperature area and the burdening gas composition distribution area, that is, when the lead, zinc, potassium, and sodium contents are determined, the multi-component complex metallurgical solid waste pellets are burdened to the optimal top furnace temperature T i and the optimal top furnace gas composition content index At this time, the thermodynamic conditions and kinetic conditions are the best during the subsequent reduction process. Based on experimental and on-site measurement data, the map of the advantageous burdening area for the multi-component complex metallurgical solid waste pellets is determined as shown in Figure 4 . Figure 4 The figure shows the relationship diagram of the burdening temperature and the optimal burdening gas phase composition when the total contents of lead, zinc, potassium, and sodium in the multi-component complex metallurgical solid waste pellets are 2.6, 2.8, and 3.0% respectively

[0073] From Figure 4 it can be seen that when selecting the metal content of the multi-component complex metallurgical solid waste and determining the temperature of the burdening area, when the gas phase composition content in the burdening area is higher than the optimal gas phase composition content, it belongs to the burdening area of the multi-component complex metallurgical solid waste. When the phase composition content is lower than the optimal gas phase composition content, it belongs to the burdening area of ordinary materials

[0074] (3) According to the general specifications of the steel plant production process, the component content of the multi-component complex metallurgical solid waste pellets remains basically unchanged every day, denoted as W. When W is determined, it is necessary to control the burdening area of the multi-component complex metallurgical solid waste pellets to achieve the best reduction effect. The flowchart of its judgment and execution program is as shown in Figure 5 .

[0075] (4) Input the concentric circle layer number i = 1 in the judgment program, and the temperature T i and the gas composition content index G i corresponding to this layer

[0076] (5) According to the map of the advantageous burdening position area of the solid waste pellets into the furnace, select the optimal reducing gas composition content index i corresponding to the temperature T

[0077] (6) Judge the magnitude relationship between the measured value G i of the gas composition content index in this area and. When , it is judged that this area is the burdening area of the metallurgical solid waste pellets. When , it is judged that this area is the burdening area of conventional materials

[0078] (7) End the judgment program, and at the same time increment the number of concentric circles i by 1. Repeat steps (4) to (6). When i increases to n, the next input starts from i = 0. Specific Embodiment

[0080] In this embodiment, a metallurgical solid waste high-efficiency treatment system and its production control method for regional cloth-coupled hydrogen-rich smelting according to the present invention are applied to a hydrogen-rich blast furnace with a throat diameter of 4400 mm. The top cross-section of the furnace is divided into 10 concentric circles, and the number of each layer is i = 1, 2, 3, 4, 5, 6, 7, where the 10th circle is the outermost layer of the top cross-section of the furnace. At the same time, it is determined that the total content of lead, zinc, potassium, and sodium in the daily multi-component complex metallurgical solid waste pellets is 3.0%.

[0081] The thermal imager located above the top of the furnace measures the temperature distribution of the entire top cross-section of the furnace, draws a temperature distribution map, and marks the isothermal line temperatures T1 = 500 °C, T2 = 450 °C, T3 = 400 °C, T4 = 350 °C, T5 = 300 °C, T6 = 250 °C, T7 = 200 °C on the circumference where the concentric circle i is located; the gas collector located above the top of the furnace collects the gas components at the positions of 7 concentric circles and transmits them to the gas analyzer to obtain the gas components at these 7 concentric circle positions, denoted as G1 = 0.2, G2 = 0.3, G3 = 0.4, G4 = 0.5, G5 = 0.6, G6 = 0.7, G7 = 0.8.

[0082] Summarize and input the above several groups of data i = 1, 2, 3, 4, 5; T i = T1, T2, T3, T4, T5, T6, T7; G i = G1, G2, G3, G4, G5, G6, G7; through the data transmission system and input them into the control subsystem for the following judgment:

[0083] (1) When i = 1, take the temperature T1 = 500 °C, and through the metallurgical solid waste pellet feeding advantage area diagram, calculate the best feeding top gas composition content index corresponding to T1 = 500 °C G1 = 0.2; start the judgment Then output that the i-th circle is the metallurgical solid waste pellet feeding area;

[0084] (2) Increment i by 1, input i = 2, T2 = 450 °C, and calculate that when T2 = 450 °C, obtain = 0.24, start the judgment Then output that the i-th circle is the metallurgical solid waste pellet feeding area;

[0085] (3) Increment i by 1, input i = 3, T3 = 400 °C, and calculate that when T3 = 400 °C, obtain = 0.39, start the judgment Then the output of the i-th circle is the pellet charging area of metallurgical solid waste;

[0086] (4) Increment i by 1, input i = 4, T4 = 350 °C, and calculate that when T4 = 350 °C, obtain = 0.5, and start the judgment Then the output of the i-th circle is the pellet charging area of metallurgical solid waste;

[0087] (5) Increment i by 1, input i = 5, T5 = 300 °C, and calculate that when T5 = 300 °C, obtain = 0.62, and start the judgment Then the output of the i-th circle is the charging area of conventional furnace charge materials;

[0088] (6) End the judgment, and output all concentric circle areas where i = 5 and after, that is, i = 5, 6, 7 as the charging area of conventional furnace charge materials. When restarting the charging, reset i to 1 and repeat the above judgment steps.

[0089] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present invention based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should fall within the protection scope determined by the claims.

Claims

1. A metallurgical solid waste treatment system based on regional cloth, characterized in that, It includes a burden distribution subsystem at the top of the blast furnace, a top temperature distribution detection subsystem, an on-line analysis subsystem for the composition of top gas, a hydrogen injection subsystem, and a control subsystem; among which: The burden distribution subsystem includes a charging drive device, a top receiving hopper, a reversing chute, a three-bin charging bin, a throttle valve, a central throat pipe, and a rotary chute; the bell-less burden distribution system at the top of the furnace is located at the upper end of the blast furnace body, and the lower end of the feeding pipeline is fixedly connected to the top of the blast furnace. The rotary chute can distribute burden to any position of the entire top cross-section of the furnace; the three-bin charging bin is divided into a coke bin, an ore bin, and a multi-component complex metallurgical solid waste bin. The burden distribution subsystem is arranged to alternately charge multi-component complex metallurgical solid waste and conventional production ore into the furnace for smelting; The top thermal imaging detection subsystem includes a furnace body mounting part, a high-temperature infrared lens, a high-definition special thermal imager, a camera gun body, a water cooling device, a lens purging device, a lens scraping device, a high-temperature electric isolation device, an automatic entry / exit mechanism, a temperature sensor, and a pressure sensor; The top gas component content detection subsystem includes a gas sampling gun, a water cooling device, a real-time gas analyzer, a gas control valve group, an axial distributor, and a pipeline stop valve; The hydrogen injection subsystem includes a multi-layer and multi-position static pressure detector on the furnace body and a blowing layer and hydrogen nozzles corresponding to the position of the static pressure detector; The control subsystem is arranged to control the burden distribution position of the burden distribution subsystem and at the same time control the hydrogen injection subsystem to perform hydrogen-rich injection.

2. The metallurgical solid waste treatment system based on regional cloth as claimed in claim 1, wherein, In the burden distribution subsystem, the burden distribution angle of the rotary chute continuously changes in the range of rotating 10 degrees to 45 degrees counterclockwise from the vertical direction, and the maximum rotation angle of 45 degrees can distribute burden to the outermost circle of the top cross-section of the furnace.

3. The metallurgical solid waste treatment system based on regional fabric as claimed in claim 2, wherein, In the burden distribution subsystem, the three-bin charging bin is divided into a coke bin, an ore bin, and a multi-component complex metallurgical material bin.

4. The metallurgical solid waste treatment system based on regional cloth as claimed in claim 3, wherein, The blast furnace top thermal imaging detection subsystem is arranged to detect the temperature distribution of the cross-section of the blast furnace top: (2-1) Take a cross-sectional view of the blast furnace top position, draw n concentric circles with equal differences in radius through the center of the cross-section. The largest concentric circle coincides with the inner circle of the blast furnace top. Denote the smallest concentric circle as the first circle, that is, i = 1, 2, 3... n, so as to divide the entire top cross-section of the furnace into several concentric circle regions; (2-2) Determine the temperature distribution of a certain concentric circle i at the top cross-section of the furnace, denoted as T i , and use an infrared thermal imager to conduct thermal imaging detection on the entire top cross-section of the furnace to obtain the cross-section temperature distribution map, with the center point temperature denoted as T0.

5. The metallurgical solid waste treatment system based on regional cloth as claimed in claim 4, wherein, The on-line analysis subsystem for the composition of top gas of the blast furnace is arranged to detect the content of the gas components at the top of the blast furnace: The gas phase component content index of a certain concentric circle i on the top section of the furnace is denoted as G i , and the mass fraction of CO in the concentric circle i is detected by the online analysis system of the top gas composition as The mass fraction of H2 is The mass fraction of CO2 is The mass fraction of H2O is Thus, the gas phase component content index G of this area i is calculated as follows:

6. The metallurgical solid waste treatment system based on regional cloth as claimed in claim 5, wherein, In the hydrogen injection subsystem, the static pressure monitoring subsystem on the furnace body includes m monitoring layers evenly distributed in the axial direction of the furnace body, and each layer is i = 1, 2... m; each layer includes n monitoring points evenly distributed in the circumferential direction of the furnace body, and each point is j = 1, 2... n; the hydrogen injection subsystem also includes m blowing layers corresponding to the positions of the monitoring layers, and the blowing layer includes n nozzles corresponding to the positions of the monitoring points.

7. The metallurgical solid waste treatment system based on regional cloth as claimed in claim 6, wherein, In the control subsystem, the calculation model for selecting the best burden distribution position according to the content of multi-component complex metallurgical solid waste is constructed as follows: (5-1) Draw the temperature distribution curve and gas phase composition distribution curve in the blast furnace; (5-2) Develop a map of the advantageous area for the burden distribution of multi-component complex metallurgical solid waste pellets; (5-3) Obtain the component content W of the multi-component complex metallurgical solid waste pellets; (5-4) Input the number of concentric circle layers \(i = 1\), the corresponding temperature \(T\) of this layer i and the gas composition content index \(G\) i ; (5-5) Select the temperature T of this layer according to the advantageous area diagram. i The corresponding optimal reducing gas composition content index (5-6) Judge the measured value G of the gas composition content index in this area. i And the size relationship. When If so, it is judged that this area is the charging area of metallurgical solid waste pellets. When If so, it is judged that this area is the charging area of conventional materials; (5-7) Return to (5-4), and at the same time increase the concentric circle layer number i by 1, and repeat steps (4) to (6). When i increases to n, the next input starts from i = 0.

8. A production control method carried out on a metallurgical solid waste treatment system based on regional fabrics, characterized in that, It includes the steps: (6-1) Provide a metallurgical solid waste treatment system based on regional cloth as described in any one of claims 1-7; (6-2) Draw the temperature distribution curve and gas phase composition distribution curve in the blast furnace; (6-3) Develop a map of the advantageous area for pellet cloth of metallurgical solid waste; (6-4) Obtain the component content W of the metallurgical solid waste pellets in the blast furnace; (6-5) Input the number of concentric circle layers \(i = 1\), the corresponding temperature \(T\) of this layer i and the gas component content index \(G\) i ; (6-6) Select the best reduction gas composition content index corresponding to the temperature T of this layer according to the advantage area map of the target blast furnace i ​ (6 - 7) Determine the measured value G of the gas composition content index in this area i and the size relationship with. When holds, it is determined that this area is the pelletizing area of metallurgical solid waste. When holds, it is determined that this area is the conventional material feeding area; (6 - 8) The control subsystem controls the feeding system to perform feeding.

9. A production control method carried out on a metallurgical solid waste treatment system based on regional cloth, wherein, The metallurgical solid waste is pellets including components such as environmental dust removal ash, sintering dust sludge, blast furnace gas ash, blast furnace dust removal ash, converter dust, rolling mill dust, scale, zinc-containing iron ore or fly ash from waste incineration.

10. A production control method carried out on a metallurgical solid waste treatment system based on regional cloth, wherein, Hydrogen is injected into the target blast furnace and the hydrogen is produced by electrolysis; all the electric energy used in the whole process comes from gas power generation, steam surplus pressure power generation, solar power generation, wind power generation, nuclear power generation and off-peak electric energy from the power grid. The produced low-carbon hot metal / pig iron will enter the subsequent smelting equipment of the converter and electric furnace for the manufacture of steel products or components; the produced zinc-containing dust is leached with an acidic solution to precipitate and filter out the impurity components, and then ultra-high purity Zn plates are obtained by electrolysis.

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