wanhaorefractory

  Refractory castables are usually classified according to the size of porosity, selected binder or bonding method, aggregate type and construction method. According to the porosity, it can be divided into dense refractory castables and insulating refractory castables. According to cementing methods, refractory castables can be divided into four types: hydration bonded castables, chemical bonded castables (including polymerization bonded castables), hydration and polymerization bonded castables (typically low cement bonded castables) and condensation bonded castables. According to the special functions of binders and some materials, they can be classified into the following seven categories: (1) clay bonded refractory castable; (2) superfine powder (such as silica fume, etc.) combined with refractory castable; (3) Cement bonded refractory castable; (4) chemically bonded refractory castable; (5) ρ-ALO (hydrated ALO) combined refractory castable; (6) Low cement bonded...

Cold crushing strength Cold crushing strength is the ultimate load per unit area of dense shaped refractory products can withstand without damage at room temperature. The cold crushing strength of pressure-resistant refractory products has a great impact for the production, transportation and use performance, so higher cold crushing strength is better. The high crushing strength indicates that the processed quality is good, structure is uniform, and well sintered. High temperature crushing strength High-temperature crushing strength is the refractory products under the specified high temperature conditions, the unit area can withstand without damage. The high temperature crushing strength of refractory products determines the use scope, which is an important basis for the use of refractory materials . High temperature crushing strength indexes are also meaningful to unshaped refractories, especially refractory castables and fire-resistant plast...

The refractory and the erosion resistance of the refractory can be obtained by selecting the high quality refractory material and having the proper proportion and strong tamping, Compared with refractory castable and plastic, it has high stability and corrosion resistance at high temperature. However, the service life depends largely on the pre sintering of the used or the amount of sintering used for the first time. If the heating surface is sintered as a whole and cracked and not separated from the bottom, the service life can be improved. Wanhao is a manufacturer who is specialized in designing various kinds of furnace and making refractory products for electric furnace, ladle, tundish, blast furnace, AOD furnace, IF furnace, etc. Article Source: Property and application of refractory ramming mass Company name: Wanhao Refractory Email:sales100@wanhaorefractory.com Website: http://www.wanhaorefractory.com/           ...

The main factors that affect the service life of tundish castable safety layer are casting, sintering and using. 1.Casting. During casting, if the water added is more than it should be, or the vibration is not even at some parts, there will be more pores, which would cause partial stress concentration and aggregate segregation, the hardness of safety layer would not be enough, which affects the quality of the whole safety layer. 2.Sintering. If there is bad exhaust, rapid temperature rise during sintering, it will cause partial stress concentration and rapid expansion, stress is over the limits which the tundish castable can endure, partial collapse would appear. 3.Using. The damages during using are mains as erosion, sintering, carbonization, cracking, spalling, even partial collapse caused by the erosion of molten steel as the heats go by. The main reason is slag erosion under high temperature. Article Source: T he ...

Refractory castable construction requirements: 1. Winter construction refers to the ambient temperature at +5 ℃ ~ -5 ℃ when the construction. The temperature below -5 ℃ when only the adoption of a reliable anti-cold measures after the construction of gas. 2. Winter construction must refer to winter construction skills initiatives. To do a good job on the work environment of the block, the wind, heating and warm work, to keep the masonry after the temperature of +5 ℃. 3. During the winter construction of castable material, the dry material should be stored in the heating room, and with water spices, mixing material temperature maintained at 10 ℃ or more. Loss of additional chemical accelerator or antifreeze. 4. Winter in the furnace construction, the first insulation layer should be good to mobilize the refractory layer of anti-freeze ability. After construction, masonry covered with plastic sheeting, and then covered with dried vegetables. On the new puzzle kiln, the ...