Ramming material for medium frequency furnace and preparation method of ramming material

Abstract

The invention belongs to the technical field of refractory materials, in particular to a ramming material for a medium frequency furnace and a preparation method of the ramming material. The ramming material is prepared from the following components in parts by weight: 50-80 parts of bauxite, 20-30 parts of spinel, 10-20 parts of magnesite powder, 5-10 parts of thermosetting resin, 20-40 parts ofdried waste silicone sludge, 10-20 parts of silicon carbide particles with grain sizes being 1-3 mm, and 5-10 parts of graphite with the purity greater than 95wt%. The connecting strength and the compact strength of the inner structure of a cured product are relatively high, and the using effect is good. The ramming material is good in plasticity, relatively low in construction difficulty and relatively low in water-absorbing quality, and the service life of the ramming material is further prolonged compared with that of an existing ramming material. By taking the waste silicone sludge as a raw material, the production cost is lowered effectively. The product has relatively high cost performance and has relatively good market competitiveness, and the invention also provides a preparation method of the ramming material for the medium frequency furnace.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a ramming material for an intermediate frequency furnace and a preparation method thereof. Background technique [0002] The lining of the intermediate frequency furnace is a key part of the intermediate frequency furnace. The quality of the lining refractory material is an important factor that determines the life of the intermediate frequency furnace, casting quality, safety and reliability. The intermediate frequency induction furnace has many advantages in smelting, but the thickness of the furnace lining is thin, the temperature gradient is large, and it is repeatedly subjected to rapid cooling and rapid heating, and based on the damage mechanism, the refractory material for the intermediate frequency induction furnace is required to have the following properties: good resistance to metal solution and slag penetration erosion performance; good high-t...

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Problems solved by technology

[0003] At present, the domestically produced ramming materials mainly have the following disadvantages: 1. It is not easy to preserve, and it is easy to absorb moisture in the air during storage and use, causing hydration reactions, and causing side effects such as weight gain and volume expansion of the ramming materials. Seriously affect the service life; 2. Poor plasticity, because the composition of the ramming material is relatively single, it is difficult to effectively form the annular joint filling, and the construction is difficult; 3. The compactness of the organizational structure after forming is poor, because the components of the ramming material mainly rely on The binder is fixed, and the cured ramming material has low connection strength between components, and the compactness is not enough, which affects the use effect; 4. Some ramming materials use boron oxide as a binder and contain quartz components. When the basic component is in the form of quartz→phosphoquartz→cristobalite, the volume expansion exceeds 15%, which leads to more loss and shorter service life

Waste silicon mud is industrial waste obtained after precipitation or pressure filtration during the production of sodium silicate and silica gel. It is alkaline and paste-like, and contains ethylene glycol, diethylene glycol, polyethylene glycol and other substances. It can corrode the skin, and long-term discharge not only pollutes the environment, but also wastes resources. Because it contains more silicon, it can be used as a substitute for silicon carbide. At present, there has been no report of using waste silicon mud in ramming materials. technical solutions