wanhaorefractory

1. Causes of Leakage (1) Molten steel temperature is too high, and with strong oxidation; (2) The quality of refractory materials or ladle masonry is not good; (3) The quality of purging-plug at the bottom of ladle is poor; (4) Ladle slide gate plate or nozzle is not properly installed. 2. Accident Handling (1) When leakage occurs, the BOF must be lifted immediately to stop tapping; (2) At the same time, the steel ladle transfer car shall be driven away to avoid damage. (3) Lift ladle to the accident treatment area; (4) Inform the relevant personnel around the operation area to pay attention to the leaked ladle, and avoid it in time. 3. Prevention of ladle leakage (1) Check the ladle carefully; (2) Quality acceptance of refractory materials ; (3) Check the masonry quality of ladle working layer; (4) Used ladle before re-use, the residual steel slag must be removed under red hot conditions, and the erosion must be checked in detail; (5) When the ladle ...

Magnesia carbon brick is made from high melting point alkaline oxide and high melting point carbon material that is difficult to be infiltrated by slag and various non-oxide additives are added. Magnesia carbon bricks is mainly used for converter, ac arc furnace, dc arc furnace lining, ladle slag line and so on. As a composite refractory , magnesia carbon brick has been used to effectively utilize the slag resistance of magnesia and high thermal conductivity and low expansibility of carbon. 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.

1. Blowing argon; Blowing argon starts from tapping until the ladle reaches the LF waiting position. 2. Ladle to LF waiting position; After the ladle reaches the LF waiting position, the argon blowing tube is turned on, and ensured the argon blowing amount. 3. Refining slag ; The purpose of making refining slag : desulfurization, absorption of inclusions in molten steel, prevention of secondary oxidation, etc. 4. Ladle sampling; After heating and treating the slag (the slag is basically whitened), measure the temperature, take the first sample, add the alloy, homogenize and adjust the temperature. 5. Feed the Ca-Si wire; The best feeding time is that the molten steel is in good composition, good fluidity and not breaking the slag layer. 6. Stop blowing argon, ladle hanging to continuous casting. After stirring for 5 minutes with argon, add covering agent. Wanhao is a manufacturer who is specialized in designing various kinds of furnace and making r...

Factors affecting the surface temperature of steel ladle shell are steel smelting temperature, environment temperature and thermal resistance. 1.Steel smelting temperature. The increase in the temperature of molten steel led to an increase in the temperature of the steel ladle shell, but not obvious. In the general steelmaking temperature range, the resulting steel ladle temperature changes within 10℃. 2.Ambient temperature. When the outside temperature decreases and the temperature of the steel shell decreases. Generally the outside temperature decreases by 10℃, and the temperature of the steel ladle shell decreases by 5℃. Therefore, improving the external conditions could observably decrease the temperature of steel ladle shell. 3.Thermal resistance. The thermal resistance increases, the temperature of the steel shell decreases significantly, and the energy consumption decreases. Wanhao is a manufacturer who is specialized in designing vario...

The main factors affect the performance of  magnesia carbon bricks  include MgO / CaO ratio, chemical purity and density etc. The MgO / CaO ratio of  magnesia carbon bricks  can increase high temperature resistance, chemical erosion resistance of slag,high temperature corrosion resistance and hydration resistance. But it will decrease the magnesia carbon brick’s spalling resistance, resistance to the slag penetration and molten steel purification performance. Adding some additives in the production of  magnesia carbon bricks  can improve some performances of the  magnesia carbon bricks . Add appropriate amount of ZrO2 can improve the performance of spalling resistance,  high temperature corrosion resistance and hydration resistance of the  magnesia carbon brick . ZrO2 is called the "multi-functional" additives of  magnesia carbon brick . At Abroad, eye bricks of AOD furnace generally use high-purity, high density si...

During the use of magnesium-calcium bricks , the working end is cracked and peeled off due to changes in furnace temperature and slag penetration. Therefore, improving the spalling resistance of magnesium-calcium bricks is also one of the main ways to increase the service life of magnesium-silica brick linings. The pores in the magnesia calcium bricks can buffer the thermal stress in the magnesia-calcium bricks, prevent cracks from being generated and further expand, and help to improve the heat-stripping performance of the magnesia-calcium bricks . However, the pores in the magnesia-calcium bricks make it easier for the slag to infiltrate into the interior of the brick, forming a thicker deteriorating layer, and accelerating the structural peeling of the magnesia-calcium brick . Therefore, in practical applications, comprehensive consideration should be given to various factors to determine the porosity of magnesium-calcium bricks. In the production of magnesium-ca...

A sudden event can cause molten steel concrete in induction furnace, here are the things that should be kept in mind for remelting. 1.If the induction can not be restart in a short time, 3-5 steel tubes(diameter around 20mm) should be inserted in to the molten steel to ensure gas emmission during remelting. 2.Lean the induction furnace by 15 degree before the top concrete is melted. 3.Power should not be increased until the concrete is softened. If the temperature rises too fast, the expansion of metal exceeds which of lining material, lining material could be broken, induction furnace could be penetrated. After the concrete is softened, power can be rised to that of heat preservation till the surface of concrete is penetrated by the lower level molten steel, then set level of the induction furnace and start melting with normal power. Wanhao is a manufacturer who is specialized in designing various kinds of furnace...