Analysis of Blast Furnace Hearth Sidewall Erosion and Protective Layer Formation

Effects of Sulfur and Titanium Interaction in Molten Pig Iron on Erosion of Carbon Brick

“…Yong DENG, 1,2) Jianliang ZHANG, 1,2) Kexin JIAO 1,2) and Zhengjian LIU 1,2) * (Received on July 3, 2018; accepted on September 4, 2018; J-STAGE Advance published date: September 22, 2018) The service life of blast furnace is largely determined by the erosion of carbon brick. The experiments were carried out to investigate effects of sulfur and titanium interaction in molten pig iron on erosion of carbon brick.…”

“…The service life of blast furnace (BF) is largely determined by the erosion of carbon brick, 1,2) the erosion is inevitable due to the direct contact between carbon-undersaturated molten pig iron and carbon brick. 3,4) The erosion rate is affected by temperature, element content, the flow of molten pig iron et al, 5) to reduce the erosion rate of carbon brick has become the primary target to prolong the service life of BF.…”

Effects of Coke Ash on Erosion of Carbon Composite Brick

“…For the modern blast furnace (BF), the safety of the hearth is the foundational factor for long service life of the BF. [1][2][3][4][5] The products of reaction at the interface of the hearth are considered to be the primary reason for refractory erosion. Recently, carbon composite brick has attracted increased attention, the combination of carbon composite brick and ceramic cup is applied on the hot face of hearth.…”

Economical and Efficient Protection for Blast Furnace Hearth

“…Yong DENG, 1,2) Jian-liang ZHANG 1,2) and Ke-xin JIAO 1,2) * In order to clarify the erosion mechanism of carbon brick and realize the economical and efficient protection for blast furnace hearth at the end of the service. The damaged carbon bricks were sampled from a commercial blast furnace, the microstructure of the damaged carbon bricks was analyzed through SEM and EDS.…”

“…1,2) The burn out of hearth occurred from small BF (100 m 3 ) to large BF (4 747 m 3 ), hearth had always been the limiting area for long campaign life of BF. 3) However, the erosion mechanism of carbon brick was not clear although many dissection investigations were carried out in the past.…”