An energy-saving operation method for an annular furnace

Abstract

The invention relates to an annular furnace energy-saving operating method. When a process transition of an adjustment material is carried out, the adjustment material is subjected to a normal implementation process temperature and a gas having a reduced amount of 6-8m<3> / h, and the hydrogen proportion decreases to 0.3-0.4 from 0.9 when a high temperature zone is reached; a 7-8t adjustment material is selected as the access adjustment material for reducing the coal gas consumption amount; the workshop change time is adjusted to 4h when the furnace is full of the adjustment material to reduce the workshop change frequency and reduce the electric energy consumption; all furnace segments are cooled after quality coiled strips are transferred from a heat insulation zone; the coal gas amount in a secondary cooling zone is reduced to zero from 120m<3> when the heat insulation is carried out; and the furnace charging is carried out 7.8-8.2 after a heating instruction is received. The method which uses a non-oriented silicon steel continuous annealing set, and an oriented silicon steel intermediate annealing and decarburizing annealing set greatly reduces the energy consumption and the production cost.

Description

technical field [0001] The invention relates to an energy-saving operation method of an annular furnace. Background technique [0002] Manufacturers of oriented silicon steel mostly use ring furnaces for high-temperature annealing. In the process of adjusting the process of high-temperature annealing furnace and the process of temperature rise and fall, it is generally adjusted through the adjustment material, and at the same time, the refractory material in the furnace and the life of the inner cover are considered. Generally speaking, it is necessary to formulate standard heating and cooling curves and corresponding gas volumes in each area to ensure the entire heating and cooling process. [0003] When the high-temperature annealing furnace is cooled and kept warm due to waiting for materials and other reasons, the heating zone and the heat preservation zone will start to cool down according to the process after the genuine coils are transferred to the cooling zone. Sto...

AI Technical Summary

Problems solved by technology

[0004] In the past, the cooling and heat preservation process requires the amount of each gas to be fed according to the normal production process. During the cooling process, the inner cover is filled with adjustment materials. As long as the pressure in the inner cover and the high temperature area are in a reducing atmosphere, there is no need to pass a large amount of gas. When cooling and heat preservation, there is no need to wait for the original roll to be transferred to the cooling area before cooling down, which will greatly cause energy consumption, and will not affect the temperature of the original area; it will start to heat up after receiving the production order, and when the temperature reaches When the process temperature is reached, the original rolls have not yet entered the furnace, or the high temperature zone has reached the process temperature, but the genuine rolls are still in the heating zone, which greatly wastes gas consumption