Preparation method of baking-free magnesium vibration material

Abstract

The invention discloses a preparation method of a baking-free magnesium vibration material. The vibration material is prepared from 93-96% of magnesite, 3-6% of composite binder, 0.2-0.8% of setting accelerator and 0.2-0.8% of polycarboxylate water reducing agent. The preparation method has the advantages of single raw material, fewer production steps, less material accumulation and lower cost; and besides, the vibration material is free of baking, thereby saving the baking medium and enhancing the turnover utilization ratio of the tundish.

Description

technical field [0001] The invention relates to a baking-free vibrating material. Background technique [0002] At present: In terms of material, the working lining of the tundish used to be mostly siliceous materials, which belong to acidic refractory materials and are not suitable for the current alkaline steelmaking. Therefore, alkaline refractory materials are mostly used now, with magnesium materials as the main Mainly, it is classified from the construction method, including heat insulation board, smear material, spray paint, dry working lining, etc. The use of alkaline heat insulation board is beneficial to clean steelmaking and good heat insulation, but the disadvantage is that the service life is low, and the installation time is relatively low. The labor intensity is relatively high; smearing materials and spray coatings are commonly used at present, and have the advantages of long service life and no pollution to molten steel, etc., but it needs to add about 20% o...

AI Technical Summary

Problems solved by technology

[0002] At present: In terms of material, the working lining of the tundish used to be mostly siliceous materials, which belong to acidic refractory materials and are not suitable for the current alkaline steelmaking. Therefore, alkaline refractory materials are mostly used now, with magnesium materials as the main Mainly, it is classified from the construction method, including heat insulation board, smear material, spray paint, dry working lining, etc. The use of alkaline heat insulation board is beneficial to clean steelmaking and good heat insulation, but the disadvantage is that the service life is low, and the installation time is relatively low. The labor intensity is relatively high; smearing materials and spray coatings are commonly used at present, and have the advantages of long service life and no pollution to molten steel, etc., but it needs to add about 20% of water during construction, so there are complex maintenance of spraying or mixing equipment, and work maintenance Insufficient for a long time, in addition, in order to reduce the hydrogen absorption of molten steel, it must be baked online at 1200°C and kept for more than 4 hours; the dry material is resistant to erosion, erosion, long service life, and simple construction. The body is prone to local collapse or loosening, which can easily lead to construction quality accidents; the binder of dry materials generally uses solid phenolic resin as raw material, and it emits a large amount of toxic and harmful gases during baking and heating, which pollutes the environment and is not conducive to clean steelmaking and environmental protection. Requirements, while bringing health risks to construction workers