Production process for directly transporting molten iron to steelmaking procedure through molten iron channel
The production process of direct transportation of iron and water to steelmaking process through iron and water ditches solves the problems of heat loss, high energy consumption, high environmental pressure and safety risks in traditional iron and water transportation, and achieves efficient and low-loss short-process transportation, improving the production efficiency and safety of steel making process.
Patent Information
- Application Number
- CN202510615903.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-04
- Publication Date
- 2025-08-12
AI Technical Summary
Traditional molten iron transportation processes have problems such as serious heat loss, high energy consumption, high environmental pressure, complex processes and high safety risks, especially when molten iron is transported to steelmaking process in low efficiency and high cost.
The production process of direct transportation of iron and water ditches to steelmaking is adopted, and the refractory layer, thermal insulation layer, steel structure shell, temperature control system and baking device are used, combined with intelligent control and oxygen-rich baking technology, to achieve efficient and low-loss short-process transportation.
Significantly reduce the temperature drop of molten iron, improve transportation efficiency, reduce equipment maintenance costs, reduce carbon emissions, improve production safety and resource utilization efficiency, reduce operation costs, and promote green smelting.
Smart Images
Figure CN120464798A_ABST
Abstract
Description
Technical Field
[0001] The patent of this invention relates to the technical field of optimization of molten iron transportation process in the steel industry, and in particular to a production process that uses molten iron ditches to directly transport molten iron to the steelmaking process. Background Art
[0002] The traditional molten iron transportation process after blast furnace tapping presents the following problems: First, heat loss is severe. The traditional process requires multiple transfers, temporary storage, and ladle folding (pouring some of the molten iron into other ladles) via ladles, torpedo cars, or mixing furnaces. This exposes the molten iron for long periods of time, resulting in a temperature drop of 100-200°C. This is prone to ladle crusting and even dead ladles (where the molten iron is cold and has poor fluidity, preventing it from flowing out during iron addition in the converter or electric furnace), requiring increased converter smelting intensity. Second, energy consumption and costs are high, resulting in high maintenance costs for intermediate storage and transportation equipment (such as ladles, torpedo cars, and mixing furnaces), and significant refractory material loss. Third, environmental pressures are significant. During ladle folding and transportation, molten iron oxidizes and smoke and dust escapes, generating large amounts of CO2 and particulate matter, resulting in high environmental management costs. Fourth, the process is complex. The molten iron must be transferred multiple times through blast furnace iron addition and ladle transportation, making production scheduling difficult and prone to molten iron backlogs or long waiting times (for example, the traditional ladle turnover rate is only 2-3 times per day). Fourth, the lifting operation of the molten iron ladle involves safety risks such as the ladle tipping over and falling, and the high-temperature molten metal crane and lifting operation are one of the key links.
[0003] By integrating refractory technology, intelligent control and intensive layout, the "short process" of molten iron transportation is achieved, providing a key path for the industry's green transformation and competitiveness improvement. Summary of the Invention
[0004] The patent of this invention proposes a production process that uses molten iron ditches to directly transport molten iron to the steelmaking process, which is used to solve the outstanding problems of energy saving, environmental protection and cost reduction in the transfer of molten iron to the next process. It integrates current refractory technology, intelligent control and intensive layout, and can realize efficient, low-loss short-process transportation of molten iron.
[0005] In order to achieve the above purpose, the technical solution adopted by the patent of this invention to solve the above technical problems is: a production process for directly transporting molten iron to the steelmaking process using a molten iron ditch, mainly including a molten iron transportation ditch, an iron ladle in the molten iron pretreatment area, and a trolley.
[0006] The molten iron transport ditch is mainly composed of a ditch, columns, an emergency trough, and an inspection platform; The iron ladle in the molten iron pretreatment area is used to hold the molten iron transported from the ditch; The trolley transports the molten iron received in the reserved area to the designated location for steelmaking.
[0007] As a further embodiment of the present invention, the trench comprises a refractory layer, an insulation layer, a steel structure shell, a temperature control system, and a trench cover. Inspection platforms and guardrails are installed on both sides of the trench, and the platforms are paved with refractory bricks. A restricted zone is established at the bottom of the trench, extending ten meters to the left and right, centered on the trench. Cameras and communication equipment are also installed below the trench to facilitate monitoring and coordination. The columns are used to support the molten iron transport ditch, and refractory materials are provided around them for coating; The accident trough covers the entire ditch, and partitions are set at intervals to control the leaking molten iron in the accident state within the accident trough and within a certain range to avoid affecting the entire accident trough.
[0008] As a further embodiment of the present invention, the refractory layer is made of high-alumina refractory castable or silicon carbide (SiC) material, which can withstand temperatures up to 1600°C and effectively resist molten iron corrosion and thermal shock. The insulation layer is made of aluminum silicate fiber felt or lightweight insulation bricks, which can reduce heat loss during transportation; The steel structure shell can play a good mechanical protection role; The temperature control system is composed of an infrared thermometer, a PLC system, and a baking device, which can realize the temperature control and heating of the molten iron in the ditch to ensure the process requirements for the molten iron temperature; The groove cover is movable, which can reduce heat loss.
[0009] As a further solution of the present invention, the baking device is composed of a burner, a combustion system, flame detection and flameout protection, an emergency shut-off valve, a mechanical mechanism, a control system, etc., which can maintain long-term baking of the molten iron in the ditch and adopt oxygen-enriched baking technology to minimize the temperature drop of the molten iron.
[0010] The beneficial effects of the present invention are: In the present invention, with the help of current refractory technology, intelligent control, oxygen-enriched baking and other technologies, the traditional way of transporting molten iron after blast furnace iron-making is changed, and the high-risk transportation process of transport tank trucks such as trains, cars, and torpedo tank trucks is completely eliminated. The heat energy transfer efficiency of molten iron from the blast furnace to the converter is improved, and the high energy consumption shortcoming of the transportation process is cut off. At the same time, the operating costs such as transportation equipment, labor and maintenance are reduced. The annual profit can reach more than 20 to 30 million, and the "integrated" and efficient operation of the iron-steel interface is realized, providing a key path for the industry's green transformation and competitiveness improvement. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 This is a simplified side view of a production process that uses molten iron ditches to directly transport molten iron to the steelmaking process.
[0012] Figure 2This is a simplified top view of a production process that uses molten iron ditches to directly transport molten iron to the steelmaking process. DETAILED DESCRIPTION
[0013] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0014] like Figure 1 As shown, this embodiment provides a production process for directly transporting molten iron to the steelmaking process using a molten iron ditch, which includes a molten iron transportation ditch, an iron ladle in a molten iron pretreatment area, and a trolley.
[0015] The molten iron transport ditch mainly consists of a ditch 8, columns 4, an emergency trough 5, and a maintenance platform. Platforms and guardrails are set up on both sides of the ditch to facilitate maintenance and inspection. A no-traffic zone of ten meters on both sides of the ditch is set up at the bottom of the ditch. At the same time, cameras and communication equipment are installed under the ditch to facilitate monitoring and coordination. The iron ladle in the molten iron pretreatment area is used to hold the molten iron transported from the ditch; The trolley transports the molten iron received in the reserved area to the designated steelmaking location.
[0016] The molten iron transport ditch 8 includes a refractory layer 1, an insulation layer 2, a steel structure shell 3, a temperature control system and a ditch cover 9; the columns 4 are used to support the molten iron transport ditch, and refractory materials are arranged around them for coating; the accident trough 5 covers the entire ditch, and partitions 7 are set at regular intervals to effectively control the molten iron in the accident state within a certain range.
[0017] The refractory layer 1 in the molten iron ditch is made of high-alumina refractory castable or silicon carbide (SiC) material, which can withstand temperatures of up to 1600°C and can effectively resist molten iron erosion and thermal shock; the insulation layer 2 is made of aluminum silicate fiber felt or lightweight insulation bricks, which can reduce heat loss during transportation; the steel structure shell 3 can provide good mechanical protection; the temperature control system consists of an infrared thermometer, a PLC system, and a baking device, which can realize temperature control and heating of the molten iron in the ditch to ensure the process requirements for the molten iron temperature; the groove cover 9 is movable to reduce heat loss.
[0018] The baking device consists of a burner 6, a combustion system, flame detection and flameout protection, an emergency shut-off valve, a mechanical mechanism, a control system, etc. The burner is set at a certain angle facing the molten iron and maintains a certain distance from the molten iron, so as to maintain long-term baking of the molten iron in the ditch and reduce temperature drop.
[0019] The baking unit's gas source is metallurgical gas, a by-product of steel production. Oxygen-enriched operation utilizes oxygen-based gas distribution instead of air. Oxygen-enriched combustion increases flame temperature, boosting gas combustion efficiency by over 50%. This accelerates the heating of the molten iron trench, shortening baking time. Oxygen-enriched combustion creates a stable flame, evenly distributing heat, reducing thermal stress on the trench lining, improving baking quality, and extending the life of the molten iron trench. It also reduces emissions of harmful gases such as nitrogen oxides.
[0020] Those skilled in the art will appreciate that the embodiments described herein are intended to help readers understand the principles of the present invention, and should be understood that the scope of protection of the present invention is not limited to such specific descriptions and embodiments. Based on the technical teachings disclosed herein, those skilled in the art may make various other specific variations and combinations that do not depart from the essence of the present invention, and such variations and combinations remain within the scope of protection of the present invention.
Claims
1. A production process for directly transporting molten iron to the steelmaking process using a molten iron ditch, the process includes a molten iron transport ditch, a molten iron ladle in a molten iron pretreatment area, and a trolley.
2. The production process of directly transporting molten iron to the steelmaking process using a molten iron ditch according to claim 1, characterized in that: The molten iron transport ditch is mainly composed of a ditch, columns, an emergency trough, and an inspection platform. Platforms and guardrails are set on both sides of the ditch to facilitate maintenance and inspection. A prohibited area of ten meters on the left and right with the ditch as the center is set at the bottom of the ditch. At the same time, cameras and communication devices are installed under the ditch to facilitate monitoring and coordination and command; the molten iron ladle in the molten iron pretreatment area is used to hold the molten iron transported from the ditch; the trolley transports the molten iron received in the reserved area to the designated location.
3. The production process according to claim 2, wherein the molten iron is directly transported to the steelmaking process by a molten iron ditch, The ditch includes a refractory layer, an insulation layer, a steel structure shell, a temperature control system and a ditch cover; the columns are used to support the molten iron transport ditch, and refractory materials are arranged around them for coating; the accident trough covers the entire ditch, and partitions are set at regular intervals to effectively control the molten iron in the accident state within a certain range.
4. The production process according to claim 3, wherein the molten iron is directly transported to the steelmaking process by a molten iron ditch, The refractory layer is made of high-alumina refractory castable or silicon carbide (SiC) material, with a temperature resistance of up to 1600°C, and can effectively resist molten iron erosion and thermal shock; the insulation layer is made of aluminum silicate fiber felt or lightweight insulation bricks, which can reduce heat loss during transportation; the steel structure shell can provide good mechanical protection; the temperature control system consists of an infrared thermometer, a PLC system, and a baking device, which can realize temperature control and heating of the molten iron in the ditch to ensure the process requirements for the molten iron temperature; the groove cover is movable to reduce heat loss.
5. The production process according to claim 4, wherein the molten iron is directly transported to the steelmaking process by a molten iron ditch, The baking device is composed of a burner, a combustion system, flame detection and flameout protection, an emergency shut-off valve, a mechanical mechanism, a control system, etc., and can keep the molten iron in the ditch baked for a long time and reduce temperature drop.