Industrial silicon submerged arc furnace bottom blowing refining system
By optimizing the bottom-blown refining system of the industrial silicon submerged arc furnace, the problems of unstable gas supply and safety hazards were solved, resulting in cost reduction, quality improvement, and enhanced safety, while also reducing labor intensity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIAYUGUAN HONG DIAN IRON ALLOY CO LTD
- Filing Date
- 2025-05-30
- Publication Date
- 2026-05-01
AI Technical Summary
Traditional industrial silicon bottom-blown refining processes suffer from unstable gas sources, high procurement costs, and difficulty in accurately controlling gas consumption, resulting in high costs, low product quality and production efficiency, as well as safety hazards.
An industrial silicon submerged arc furnace bottom blowing refining system was designed, including a cryogenic liquid gas storage tank, an ambient temperature vaporizer, a buffer tank, an air compressor, and a proportioning control cabinet. The system optimizes gas delivery and mixing, and adopts automated control to reduce manual intervention.
It achieved a cost reduction of over 60%, a product quality improvement of 30.79%, enhanced production and operational safety, and reduced labor intensity.
Smart Images
Figure CN224189019U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of industrial silicon smelting equipment, and in particular to an industrial silicon submerged arc furnace bottom blowing refining system. Background Technology
[0002] In industrial silicon production, bottom-blown refining costs have always been a significant factor affecting enterprise profitability. Traditional industrial silicon bottom-blown refining processes suffer from numerous problems, such as unstable gas supply, high procurement costs, and difficulty in precisely controlling gas consumption. These issues not only lead to persistently high bottom-blown refining costs but also impact product quality and production efficiency. Furthermore, existing refining systems present safety hazards. For instance, long hoses require personnel to continuously pull on the hoses during ladle pulling and casting, posing safety risks. Frequent replacement of small liquid oxygen tanks not only increases labor intensity but also introduces safety risks. Therefore, a new industrial silicon bottom-blown refining process and system is needed to address these issues. Utility Model Content
[0003] To address the aforementioned technical problems, this utility model provides an industrial silicon submerged arc furnace bottom blowing refining system.
[0004] To achieve the above objectives, the technical solution of this utility model is as follows:
[0005] An industrial silicon submerged arc furnace bottom-blown refining system includes:
[0006] The cryogenic liquid storage tank is equipped with a complete set of valves and instruments, enabling on-site monitoring and control of liquid inflow and outflow, as well as pressure and liquid level.
[0007] An ambient temperature vaporizer, with its inlet connected to a cryogenic liquid storage tank;
[0008] Buffer tank;
[0009] Air compressor;
[0010] The mixing control cabinet has a first air inlet pipe on one side connected to the outlet end of the ambient temperature vaporizer, a second air inlet pipe connected to the air compressor, and a pipeline on the other side connected to the buffer tank. The mixed gas pipeline on it is connected to the ladle through the main pipe.
[0011] The buffer tank is used for storing vaporized oxygen gas and is equipped with a safety valve port, a pressure gauge port, an inlet and outlet port, a remote pressure transmission interface, and a drain port.
[0012] The ambient temperature vaporizer is connected to the proportioning control cabinet via a self-regulating pressure regulating valve group.
[0013] The beneficial effects of this utility model are:
[0014] 1. Cost reduction: Through the construction of a new refining system, optimization of procurement methods, process optimization, and precise operation control, the cost of bottom blowing of 1 ton of iron has been reduced from RMB 104.11 to RMB 39.39, a reduction of more than 60%.
[0015] 2. Quality Improvement: After the refining system was optimized, the refining effect was greatly improved. From April to October 2024, the quality realization rate of 97A was 95.09%, an increase of 30.79% compared to before.
[0016] 3. Enhanced Intrinsic Safety: The adoption of this new refining system eliminates the safety risks associated with personnel continuously pulling on the hoses during the ladle-pulling and casting processes, a consequence of the long hoses in the original system. The increased size of the liquid oxygen tank allows for approximately 15 days of use per fill, resolving the safety risks associated with frequent daily tank replacements in the original refining system and thus improving the inherent safety of the operation.
[0017] 4. Reduced labor intensity: The original manual operation of changing small liquid oxygen cylinders has been replaced by liquid oxygen filling trucks, which greatly reduces the workload and labor intensity of employees. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the present invention. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.
[0020] like Figure 1 As shown, an industrial silicon submerged arc furnace bottom-blowing refining system includes: a cryogenic liquid storage tank 1, equipped with a complete set of operating valves and instruments, capable of realizing the inlet and outlet of liquid and on-site monitoring and control of pressure and liquid level; an ambient air vaporizer 2, with its inlet end connected to the cryogenic liquid storage tank 1; a buffer tank 5; an air compressor 6; and a proportioning control cabinet 4, with a first air inlet pipe on one side connected to the outlet end of the ambient air vaporizer 2, a second air inlet pipe connected to the air compressor 6, and a pipeline on the other side connected to the buffer tank 5, and a mixed gas pipeline on it connected to a ladle via a main pipe. The buffer tank 5 is used for storing the vaporized oxygen gas, and is equipped with a safety valve port, a pressure gauge port, an inlet and outlet port, a remote pressure transmission interface, and a drain port. The ambient air vaporizer 2 is connected to the proportioning control cabinet 4 via a self-regulating pressure regulating valve group 3.
[0021] The cryogenic liquid storage tank 1 is a vertical, double-layered cylindrical vacuum powder insulated structure, with the inner cylinder containing liquid oxygen. The ambient temperature vaporizer 2 utilizes natural air convection to absorb heat, causing the liquid gas to absorb heat from the surrounding environment and vaporize. The working pressure is 1.6 MPa, and the vaporization capacity is 300 Nm³. 3 / h, the material is generally aluminum alloy.
[0022] In use, the liquid oxygen in the cryogenic liquid storage tank 1 is vaporized into gas after passing through the ambient temperature vaporizer 2. It is then stored in the buffer tank 5 after passing through the proportioning cabinet 4. During operation, the oxygen from the buffer tank 5 and the air from the air compressor 6 enter the mixed gas pipeline according to the proportioning cabinet 4. The oxygen and air inlet pipes are connected to the automatic main valve at the plant entrance. After entering the valve station, the oxygen and air are equipped with pressure regulating valves and flow control valves, which have both machine-side and control console operation functions. Pressure and flow detection instruments corresponding to the control valves are also installed. The automatic valve also has both machine-side and control console operation functions. The oxygen and compressed air pipelines, after pressure regulation, finally converge into the main pipe in a Y-shaped configuration, from which gas is supplied to the ladle. The main pipe splits into four branches at the valve station outlet, two branches for each furnace. The branches are controlled by ball valves. The main pipe has manual and automatic shut-off valves. The north and south branches of the main pipe also have manual and automatic shut-off valves at their connection points with the bottom blowing hose, enabling flexible and effective control of the bottom blowing refining system.
[0023] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.
Claims
1. An industrial silicon submerged arc furnace bottom-blown refining system, characterized in that, include: The cryogenic liquid storage tank (1) is equipped with a complete set of operating valves and instruments, which can realize the inlet and outlet of liquid and the on-site monitoring and control of pressure and liquid level; An ambient temperature vaporizer (2) has its inlet end connected to a cryogenic liquid storage tank (1); Buffer tank (5); Air compressor (6); The proportioning control cabinet (4) has a first air inlet pipe on one side connected to the outlet end of the air-temperature vaporizer (2), a second air inlet pipe connected to the air compressor (6), and a pipeline on the other side connected to the buffer tank (5). The mixed gas pipeline on it is connected to the iron ladle through the main pipe.
2. The industrial silicon submerged arc furnace bottom-blown refining system according to claim 1, characterized in that: The buffer tank (5) is used for storing the vaporized oxygen gas, and is equipped with a safety valve port, a pressure gauge port, an inlet and outlet port, a remote pressure transmission interface, and a drain port.
3. The industrial silicon submerged arc furnace bottom-blown refining system according to claim 1, characterized in that: The ambient temperature vaporizer (2) is connected to the proportioning control cabinet (4) via a self-regulating pressure regulating valve group (3).