The phenomenon is expected to last for another 5 months. Due to the long service life of the furnace beam and column materials, the cooling water consumption per ton of steel in 1999 was 8.5 m³/t, which led to a cost reduction of 856,000 yuan. Additionally, gas consumption per ton of steel also saw a significant decrease, dropping from 2.5890 in 1998 to 2.25801 in 1999, resulting in an economic benefit of 7.814 million yuan. The cost of castables and anchoring hooks was only over 40,000 yuan, making the overall economic benefit very substantial.
In conclusion, the membrane high-temperature furnace beam and column wrapping significantly extends the service life of the structure. It is essential to focus on the design of the castable and anchoring hook, with a specific type of anchor hook that keeps it away from oxidized areas being an effective choice. By improving the material life of the high beam and column, the amount of cooling water and gas consumption can be greatly reduced, leading to considerable economic benefits. The use of 01 mullite matrix castable for beam and column wrapping has proven to be highly effective. Furthermore, during winter, the beam and column wrapping system ensures that the water pipes are heated to 35 B, and the 2717 furnace wall is attached using metal slag melting technology.
In the field of non-ferrous metal smelting, removing metal slag from the furnace walls is typically done in a cold state, which is inefficient, time-consuming, and affects the quality of the cleaning process. To address this issue, Japan’s Kurosaki Kiln Co., Ltd. developed a new propane gas flame spray technology to remove adhesion from the furnace walls. This method involves controlling the propane gas flow, nozzle movement speed, and melt cutting depth. The application of ginseng extract and root extracts has shown promising results. Additionally, the pore diameter control and anti-aluminum osmosis properties of the 2718 casting refractory material have improved the molten steel time by 35%.
Another advantage of continuous feeding in electric arc furnaces is that it maintains a flat molten pool, allowing the arc to burn continuously and stably. This maximizes arc power and eliminates issues associated with new electric arc furnaces. At the Krakata Steel Plant in Indonesia, two high-impedance arc furnaces were purchased from Italy's Danieli in the 1998 quarter. These furnaces are equipped with a transformer capacity of 7,000 kVA, allowing for high-impedance operation through a reactor installed on the low-voltage side. They also include carbon gun bottom oxygen nozzles and online controllable post-oxygen systems. The cement castable is used as the lining refractory material, and a three-level computer system controls the entire refining process.
When dealing with alloys that are highly permeable or under difficult operating conditions, traditional refractories may not perform well. Therefore, the development and use of high-durability castables for these furnaces are crucial. Fine control of the pore size distribution enhances performance. In Germany, Baden Steel Engineering Co., Ltd. operates eight high-productivity electric furnaces with low-quality wood. Advanced design methods are used to reduce heat loss in ladle refining furnaces. Researchers at the University of Cole in the UK developed an effective method to reduce heat loss by placing a thick high-grade insulation board between the furnace shell and the refractory lining.
The world's largest ladle refining furnace was put into production at the Krupp Steel Plant in Germany. Simmag 8, 3 company supplied the LF400l50MVA for Thyssen Krupp Steel, one of the most popular ladle refining furnaces. It includes two heating stations and one power supply unit, with a rotatable electrode cross arm to meet different heating requirements. Each feeding station has a feeding device, emergency top blowing argon gun, and automatic feeding system. The contract scope included installation, commissioning, and operator training for the Krupp steel mill.
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