Electric arc furnace with ordinary dry magnesia ramming material/magnesia refractory cement

Features: high temperature resistance, strong slag resistance, good thermal shock stability, long life.
Purpose: to build suitable for arc furnace bottom.
Common Magnesia dry ramming mass for electric arc furnace

1, bottom ramming method/refractory cement  and operation process
1.1 sintering of rammed materials
The first metal furnace is important for sintering ramming material/refractory cement , oven must do work.
(1) 1mm thin plate covering the surface of material layer when necessary welding, adding scrap smelting.
(2) 100t electric furnace smelting technology based on 75% + 25% iron smelting scrap, scrap in two batches. The first batch of not adding adding molten iron, two times of loading, each basket of feed 60t, the carbon content of about 1%.
(3) the first furnace with reasonable power supply system, the baking time is more than 90min after the blackout, after the minimum flow blowing oven, made good foam slag.
(4) late melting temperature of molten steel is larger than 1650c, maintained above 15min, composition, temperature after passing 1.2 hot patching tapping.
1.2 thermal repair
(1) reduce the loading quantity gradually, the last batch of steel will be completely out of the steel net, tapping immediately after oxygen blowing is repaired surface, which is the key factor influencing patching.
(2) expect to be hanging into the ramming/refractory cement  repair surface down, mobile crane, the distribution is reasonable. Hanging into the heavy compaction.
(3) magnesia ramming materials/refractory cement used in hot state with convenient operation and repair technology of slope protection brick furnace slag line by spraying. MgO-C hot repair after baking more than 20min.
1.3 cold repair
(1) first remove patch on the surface of steel slag, residual, seeps into cracks in steel and impurities, such as refractory material in the water must be completely removed, until the appearance of refractory bricks.
(2) the replacement of slag line after the bottom pad, the ramming material/refractory cement  into the furnace, will need to be knotted materials according to the distribution of repairing surface, forming material layer until the height of about 150mm with surface repair.
(3) the material is distributed evenly, using special air vibration fork from the molten pool center to the furnace slope poke the material layer of each part.
(4) repeat the operation two times until the ramming material/refractory cement  is dense. Repeat the above steps until the appropriate shape of the molten pool is formed.
2, erosion mechanism
Ramming material/refractory cement containing more free CaO, is a high activity group and slag reaction. There are a lot of Fe2O3, produced in the process of smelting slag in Cao, Al2O3, TiO2, SiO2, easy to dissolve three calcium and silicate matrix to form low,In the sintering layer surface and contact metamorphic slag, is the main component of MgO, Cao and iron oxide by ramming material/refractory cement for heat, iron oxide content decreased gradually, fire resistance also increased with the increase of the ratio of iron oxide / Magnesium Oxide, showing a certain thickness of the working surface of the .This resulted in a MgO large grain skeleton, C3S and iron rich cao-al2o3-fe2o3 TiO2-SiO2 glass phase with sintered ceramic phase structure, its high strength, anti erosion performance is good, and has a certain thickness (160 210mm),With the extension of the campaign, the outer layer gradually eroded, sintering the displacement, the formation of good sintering. Overall ramming material/refractory cement quick sintering, good corrosion resistance, resistance to water is a kind of high quality material of iron slag erosion.

Taurus Refractory ramming mass Factory mainly engaged in professional manufacturer of development, production and sales of the refractory mixture such as melting copper, aluminum and zinc furnace lining. And supply castable refractory for copper smelting, ramming mass for molten copper,fire clay,refractory mortar, refractory cement ,refractory mixture, refractory concrete and silica sand for copper smelting.
Website: http://www.jnrefractory.com  
Contact: Mr. Niu
Tel: +86-371-64372566
Fax: +86-371-64372588
Mobile Phone: +86-15137151612
Email: info@jnrefractory.com
          gyjinniu@163.com
products list : castable refractory cement for up lead copper rod  Molten Zinc Refractory castable     Molten Zinc Ramming Mass     Molten Aluminum Refractory Material      refractory castable for up lead copper rod    Special Refractory Ramming Mass     Copper alloy refractory materials for electric furnace      acidic refractory for electric furnace body   electric furnace refractory material for copper smelting     Corrosion resistance       Molen Zinc Refractory Castable for up lead copper rod    High Strength Refractory Mortar      Refractory mortar installation services Fireclay   Light-weight Castable Refractory    castable Refractory    Accessory Refractory Material   Corrosion resistance Quartz sand    High Grade Composite Silica Ramming Mass    Corundum Plastic Refractory     Alumina Composite Ramming Mass for horizontal continuous castable     Silica Refractory Ramming Mass for horizontal continuou castable    quartz sand refractory for copper smelting     silica sand refractory for core induction furnace      refractory concrete block      pre-cast refractory block      refractory ramming mixture     fire clay for up lead copper rod      refractory mortar for non core induction furnace    refractory cement for copper smelting      high grade composite silica mortar     silica refractory cement     Magnesia refractory cement