wanhaorefractory

  The consumption of graphite electrode in EAF steelmaking runs through the whole smelting process, and its consumption is affected by many factors. This paper only analyzes the operation of smelting process. 1.Poor quality or improper proportion of scrap steel leads to poor slagging effect and prolonged smelting time The increase of feeding times and drilling data increases the probability of damage and fracture of electrode bottom; Longer smelting time is the direct factor that leads to the increase of power consumption and electrode consumption and loss. 2.Two electric furnace power supply equipment and electrode specifications do not match Electric arc furnace power transmission is a high-current and low-voltage operation. If the capacity of the power supply equipment is too large and exceeds the limit load of the electrode, the electrode will be reddened from bottom to top within 5~10min after arc starting, and the boundary of the joint is very obvious and most o

  The main types of tundish are high temperature tundish, hot tundish and cold tundish. According to the cast steel smelting method and whether it is necessary to bake and other conditions, the tundish is roughly divided into the following types. Main types of intermediate packages are as below: (1) High temperature tundish The tundish is set up for a specific metallurgical process, and the lining is made of magnesia bricks, preheated to about 1500°C. (2) Hot tundish At present, a common tundish in steel mills uses fired bricks or unfired bricks or castables as the lining of the tundish . Before pouring, it should be preheated to 800～1100℃. (3) Cold tundish The insulation board is used as the lining, which can be used without preheating before pouring. As for the choice of which tundish type and which material is better for the lining, it depends on the cast steel, smelting method, baking conditions and the ability of the steel plant itself. Article Source: The dif

  Ladle purging plug is a kind of functional refractory material with long life, energy saving, consumption reduction and emission reduction. It is made by firing high-purity raw materials. It has the advantages of high blow-through rate, corrosion resistance, thermal vibration resistance, safety and reliability, and long life. P urging plug is used in the out-of-furnace refining of ferrous metals and the smelting of non-ferrous metals. 1.The influence of smelting conditions on the air permeability of ventilating bricks The greater the degree of overheating, the lower the viscosity, surface tension, and wetting angle of the molten steel, the greater the tendency to seep steel, and the lower the ladle blow-through rate. Some research materials have introduced: when the carbon in the iron-carbon melt is 0.15% and 0.40%, the surface tension appears the minimum and the maximum, reducing the content of the non-metallic elements sulfur and oxygen of the steel grade can signif

  Alkaline refractory castable usually refers to refractory castable containing magnesia, also known as magnesia refractory castable. In order to meet the requirements of smelting clean steel, reduce slag penetration and improve thermal shock resistance, etc., it can be divided into a variety of products. Common such as magnesium-chromium (MgO-SPINEL) refractories, magnesia-alumina refractories , magnesia alumina refractories, magnesia-alumina titanium refractories and MgO-CaO refractories. The main component of the alkaline refractory castable is MgO, which easily dissolves calcium ions Ca2? and magnesium ions Mg2 , which will aggregate the highly dispersed high-aluminum fine powder and silicon powder and other active substances, resulting in too fast hardening speed and shortening the usable time , It is difficult to obtain dense construction (casting) body. The solution is to select the best binder to block these cations to control the aggregation rate of the active s

  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 ref