Steel scrap baking system

Abstract

The invention relates to a steel scrap baking system. The system comprises one or multiple steel scrap preheating units arranged in parallel side by side. Each steel scrap preheating unit comprises arail, a moving trolley sliding along the rail, a dual-layer composite heating ship bucket arranged on the moving trolley, and multiple top layer combustors arranged on a rack platform; each heating ship bucket comprises an inner layer steel plate, an outer layer steel plate and refractory matter cast between the inner layer steel plate and the outer layer steel plate, one end of each ship bucket is opened and used for discharging, the other end of each ship bucket is closed, a tail combustor is arranged on each outer layer steel plate, the two side faces of each ship bucket are each provided with multiple side face combustors, three side faces surrounding the outer layer steel plate of each ship bucket are provided with U gas pipelines and U air pipelines, and the U gas pipelines and the Uair pipelines communicate with the outer air source through quick-change connectors. The system is reasonable in structural arranging, novel in type, high in adaptation, and high in work efficiency,cost is reduced, use needs are met, and the system is efficient and practical.

Description

technical field [0001] The invention belongs to the technical field of scrap steel baking, in particular to a scrap steel baking system. Background technique [0002] In iron and steel production, in order to save energy and reduce consumption, it is usually necessary to preheat scrap steel. In terms of economic benefits, on the one hand, scrap steel preheating can greatly reduce the energy consumption of the converter. The reduction of maintenance costs, the increase of output, and the improvement of steel quality all contribute to different degrees, and the comprehensive economic benefits are huge. Industrial enterprises are large energy consumers. The reduction of energy consumption can greatly reduce the emission of greenhouse gases and other nitrogen oxides, which has a positive impact on environmental governance and has obvious social benefits. [0003] The existing scrap steel preheating system has a single setting form, and the burner setting structure is unreasonab...

AI Technical Summary

Problems solved by technology

[0003] The existing scrap steel preheating system has a single setting form, and the burner setting structure is unreasonable, which leads to uneven heating of the upper and lower parts of the scrap steel during preheating, low fuel utilization rate, and low heating efficiency. Defects, when scrap steel is preheated, it is necessary to connect the external gas source main pipeline and air source main pipeline (external gas source main pipeline) with the gas delivery pipeline and air delivery pipeline of the burner on the preheating device (that is, the on-site operation equipment) The gas delivery pipeline) is docked and connected to supply the burner with a continuous gas source. After the scrap steel preheating is completed, in order to avoid heat loss, it needs to be transferred to the converter for smelting immediately. The current technology is that the site needs to be preheated after the preheating The gas delivery pipeline or air delivery pipeline of the burner on the device is respectively disconnected from the main pipeline of external gas source or main pipeline of air source, and then the mobile equipment with preheating device is transferred to the converter position, and the preheated scrap steel is poured into the converter for subsequent smelting

During the transfer process, the mobile equipment often needs to drag the long and heavy gas delivery pipeline fixed on the preheating device at the same time. On the one hand, the gas delivery pipeline is seriously damaged, the replacement and maintenance cycle is short, the cost is increased, and there are potential safety hazards. On the one hand, due to the certain weight of the gas delivery pipeline, it will increase the power consumption of the equipment and increase the cost when dragging; and the current pipeline docking installation operation is cumbersome and laborious

In addition, in order to avoid and reduce heat loss, it is usually necessary to hoist the scrap hopper to the converter position immediately after the scrap is preheated, and pour the preheated scrap into the converter for subsequent baking and smelting. Since the scrap preheating temperature is very high, just preheating The surface temperature of the heated scrap steel hopper is abnormally high, and the high-temperature hopper containing scrap steel is easily lifted by the hook for a long time, which will easily deform the lifting lugs on the hopper and make the connection between the lifting lugs and the hopper unstable, and easily cause the hopper to tip over during the lifting process and cause safety accidents

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