The tundish heater commonly has the following three issues:
2025-11-28
Before use, the working-layer dry料 used in tundishes must possess a certain level of low-temperature strength. This low-temperature strength is primarily achieved through vibration and baking. After being vibrated and baked and then demolded, dry materials often exhibit localized areas with low or no strength, which can easily lead to tundish collapse and adversely affect continuous casting production. The main reasons for the absence of strength or low strength in dry materials are as follows:
1. Moisture absorption in dry materials: Dry materials are made of 30% Fine powder and dry materials becoming damp: Dry materials are made of 30% fine powder and 70% The particle composition includes fine powder, which contains a binder and magnesia sand. Due to its high specific surface area, the fine powder readily absorbs moisture and becomes damp. Once the binder and magnesia sand absorb water, they undergo hydration and degradation, causing the binder to lose its effectiveness and fail to generate bonding strength during firing. ;
2. Uneven mixing of the binder: When producing dry-mix materials, various particles, fine powders, and binders need to be combined and thoroughly mixed. Sometimes, this mixing process can become uneven due to factors such as inadequate mixing equipment or human error. As a result, some portions of the dry-mix material may lack binder altogether or have very little binder content, leading to localized weakness after baking and demolding.
3. Problems caused by baking furnaces: Since most tundish baking furnaces used in steel plants are gas-fired, prolonged use can lead to significant buildup of tar in the pipelines or damage to the burners, resulting in poor localized heating performance and consequently low or no strength.
Solution: First, ensure the baking performance of the tundish heater by regularly purging the gas pipelines to remove tar and dust, and promptly replacing any damaged burners. Second, ensure that the dry materials are thoroughly dried and uniformly mixed.
Zhengzhou Zhongwei Environmental Protection Equipment Co., Ltd.: Gas, oil, and electric heating ladle (hot metal ladle) dryers; silicon ladle dryers; nickel-iron ladle dryers; oxygen-enriched, pure-oxygen, and air-assisted combustion energy-saving gas dryers—available internationally. : Diesel, heavy oil, tire oil, and gasifier-generated mixed-gas roasters. Technical exchange, shared information resources, and win-win cooperation (WeChat synchronized). 13849187223。
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Address: No. 118, Fengqing Road, Jinshui District, Zhengzhou City
Tel:+86-371-60960056
Mobile:+8613849187223
Email:zhongweigongyelu@126.com
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