Low temperature preannealing production method for grain oriented silicon steel

By adding a low-temperature pre-annealing furnace before the high-temperature annealing furnace, the problems of insufficient capacity and flexibility in the high-temperature annealing process are solved, achieving more efficient production and quality control, and improving the production efficiency and product uniformity of grain-oriented silicon steel.

CN116463478BActive Publication Date: 2026-06-12BAOSHAN IRON & STEEL CO LTD
3 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BAOSHAN IRON & STEEL CO LTD
Filing Date
2022-01-12
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

Existing high-temperature annealing processes suffer from capacity limitations, poor production and process flexibility, and existing equipment is insufficient to meet the demands of large-scale production.

⚗Method used

A low-temperature pre-annealing furnace is added before the high-temperature annealing furnace. The moisture in the MgO coating is removed by the low-temperature pre-annealing furnace, and a non-oxidizing atmosphere is used for protection to ensure the temperature uniformity and quality consistency of the vertical steel coils and shorten the subsequent high-temperature annealing cycle.

🎯Benefits of technology

It increased production capacity, improved product quality and process flexibility, reduced production cycles, lowered energy consumption, and enhanced production efficiency.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

The application discloses a low-temperature pre-annealing production method of oriented silicon steel, and realizes the low-temperature pre-annealing production method by using a low-temperature pre-annealing furnace, and comprises the following steps: step 1, a vertical steel coil (4) is arranged in a furnace body (1) through a sealing device (3), a heating system (2) is used for heating the furnace temperature in the furnace body from normal temperature to a first temperature, the first temperature is greater than or equal to an MgO dehydration temperature, the furnace temperature is less than or equal to 950 DEG C, water in an MgO coating on a surface of the vertical steel coil is decomposed and discharged, and a cold spot (41) of the vertical steel coil reaches a temperature higher than the MgO dehydration temperature; and step 2, after the low-temperature pre-annealing is completed, a temperature difference between the cold spot and a hot spot (42) of the vertical steel coil is not more than a temperature difference threshold value, and subsequent high-temperature annealing production is carried out on the vertical steel coil. The application can break through the capacity limitation of a conventional high-temperature annealing process, greatly improves the yield on the basis of guaranteeing the production quality, and simultaneously improves the problem of poor production and process flexibility of the high-temperature annealing process.
Need to check novelty before this filing date? Find Prior Art