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Discussion on R&D and Practice of Longevity of Refractory Materials for Blast Furnace
Release time:
2020-06-11
Haoxing Co., Ltd. and Wuhan University of Science and Technology jointly tackled the problem by optimizing the technological process of compounding materials and binders, refining the production management of each link, etc., to improve the level of comprehensive big data analysis; compared with the existing technology, it has the following advantages: optimized formula combination Reasonable, reduced material cost, and streamlined preparation methods can reduce the overall operating cost of the iron ditch material project, save high-quality refractory raw material resources, increase the primary iron flux of the blast furnace ditch refractory material to more than 250,000 tons, and effectively extend the iron output The service life of the yard has significant economic benefits and important significance for the high and stable production of blast furnace ironmaking and on-site safety. Typical index values of iron ditch material for large and medium blast furnace tapping fields are shown in Table 2.
Sun Zhihong Huang Zhongtao Li Changning Shi Hongpeng
With the progress of ironmaking technology, the blast furnace has developed to a large scale. The blast furnace tapping channel is a key part of the blast furnace slag-iron separation channel. The cast iron channel castables play a very important role in the safe and smooth operation of blast furnace ironmaking. Iron ditch castables are required to have good erosion resistance and excellent spalling resistance. Existing technology Large and medium-sized blast furnace tapping work linings generally use Al2O3-SiC-C low-quality cement castables, and the service life is usually 150,000 to 200,000 tons of iron flux. The work lining material of the iron ditch faces the following problems. First, it is not only subject to the erosion of high-temperature slag iron, but also subject to the thermal shock of the slag iron flow. The loss is faster and the maintenance period is long, which affects the normal and safe production of the blast furnace; The iron flux of the iron and steel ditch of the large and medium-sized blast furnaces with a capacity of more than 10,000 tons. Under such circumstances, there is an urgent need to develop a series of high-temperature sintering performance, corrosion resistance, oxidation resistance, and high temperature slag-iron scouring performance of the iron groove material.
Haoxing Co., Ltd. and Wuhan University of Science and Technology jointly tackled the problem by optimizing the technological process of compounding materials and binders, refining the production management of each link, etc., to improve the level of comprehensive big data analysis; compared with the existing technology, it has the following advantages: optimized formula combination Reasonable, reduced material cost, and streamlined preparation methods can reduce the overall operating cost of the iron ditch material project, save high-quality refractory raw material resources, increase the primary iron flux of the blast furnace ditch refractory material to more than 250,000 tons, and effectively extend the iron output The service life of the yard has significant economic benefits and important significance for the high and stable production of blast furnace ironmaking and on-site safety. Typical index values of iron ditch material for large and medium blast furnace tapping fields are shown in Table 2.
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