A furnace temperature optimization method based on heat balance for a walking heating furnace

Abstract

The invention provides a technical scheme of a thermal balance-based furnace temperature optimization method of a walking beam furnace. According to the scheme, the method is characterized in that on the premise that the requirements of steel blank rolling are met, set values of temperatures of different sections of the furnace are reduced to the greatest extent, then the fuel consumption is reduced, and the oxidation burning loss of steel blanks is reduced. According to the method, the heat balance relationship inside the furnace is utilized to establish relationship expression of the furnace temperature, the steel temperature, the heat supply amount and the heat loss, and optimal furnace temperatures of different sections along the length direction of the furnace are calculated according to the working conditions such as the furnace model, the steel blank specification, the types, the target discharge temperature, the feeding temperature and the rolling efficiency, so that the steel blanks are heated to be appropriate temperature and allowable cross section temperature difference within the fixed time, and the minimum energy is consumed.

Description

Technical field: [0001] The invention belongs to the technical field of walking heating furnaces for steel rolling in iron and steel plants, and in particular relates to the relationship between the optimal heat supply of the heating furnace, the furnace temperature and the billet temperature during the process of heating steel slabs in the walking heating furnace. Background technique: [0002] The heating furnace is a major pre-equipment on the steel rolling production line, and its purpose is to provide the rolling mill with heated billets that meet the process requirements. Walking heating furnace is the most widely used steel billet heating furnace type in rolling mills today. The billet is sent step by step from the feeding end of the heating furnace to the discharging end through the cyclical action of the walking beam rising, advancing, lowering and retreating. During the process, the steel billet is gradually heated. [0003] In order to heat the billet to the targ...

AI Technical Summary

Problems solved by technology

The original traditional high fever method no longer meets the needs of the market

Moreover, the heating rate of steel types is limited by the heat conduction rate of each steel type. It is not that the higher the furnace temperature is, the more heat will be absorbed by the billet. Under the limit of heat conduction rate, even if the steel is fired at high temperature, the excess heat will not be absorbed by the billet, but will affect the furnace. adverse effects on body life