Long-life steelmaking tundish dry material processing and using process
A processing technology and long-life technology, applied in the field of refractory materials, can solve the problems of the life-limiting link of slag corrosion resistance, the increase of the temperature of the tundish shell, and the thinning of the dry material of the working layer, so as to improve the service life and improve the Sintering resistance, the effect of solving safety hazards
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Embodiment 1
[0025] The steelmaking tundish dry material processing process includes the following steps:
[0026] Step 1: Determine the formula and conduct tests in the laboratory. The test proves that because silicon carbide has good corrosion resistance and erosion resistance, adding silicon carbide to the slag line dry material can improve its service life, and adding scales to the wall dry material Graphite, which increases resistance to sintering and thus increases service life.
[0027] Step 2: Selection of raw materials. The dry material is made of high-grade fused magnesia and silicon carbide. Put an appropriate amount of fused magnesia, silicon carbide and their auxiliary materials into a mixer to stir and knead to obtain a dry slag line. For the formula material, put appropriate amounts of fused magnesia, silicon carbide and flake graphite into the mixer to stir and knead to obtain the wall-coated dry formula material;
[0028] Step 3: Safe production, marking the production da...
Embodiment 2
[0030] The process of using dry material in steelmaking tundish includes the following steps:
[0031] S1: Arrange technical personnel on site to follow up the construction, use different dry materials for the slag line and cladding wall, and improve the erosion resistance of the slag line dry material and the sintering resistance of the cladding dry material in a targeted manner;
[0032] S2: Technicians track the pouring process, measure the temperature of the tundish shell at any time, and observe whether the dry material falls off during use;
[0033] S3: Measure the slag line erosion thickness and the sintered thickness of the tundish wall after the tundish is used and off-line, track the turning over of the tundish, and observe the difficulty of turning over the tundish;
[0034] S4: Summarize the test data and complete the test.
Embodiment 3
[0035] Embodiment 3, in the step 2 of preparing the intermediate material, an appropriate amount of sintering aid iron red can be added. The raw material magnesia for preparing the intermediate material is ultrafine powder, and the particle size of the ultrafine powder is less than 2 μm. Its raw materials are fused magnesia and silicon carbide. The weight ratio is 4:6. The order of adding raw materials to the mixer in the production steps must be strictly followed. The mixing step is divided into premixing and further mixing. The control time is 20-25 minutes, and further mixing is to put the sintering agent, auxiliary materials and premix into the mixer for mixing, the time is controlled for 15-20 minutes, and the mixing temperature can be controlled at room temperature.
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