The maintenance of induction furnace - continuous smelting and repair

induction furnace refractory lining materials

1.Continuous furnace
To reduce the repeated heat that caused by quenching refractory material for induction furnace lining cracking, continuous furnace for the extension of lining life is very important, it has caused enough attention of many users. If can't continuous use, intermediate frequency furnace in after a single use, want to join metals refractory material in furnace burden, and cover the furnace cover, it can not only give metal furnace refractory induction furnace charge preheating, also can prevent the lining cracks caused by rapid cooling.

2.The repair
(1) The intermediate frequency furnace to about 20 heats then need to tear down all of my throat opening, purpose is to check whether the refractory products induction furnace lining is drill iron, and check the dry induction furnace loosening clearance. To repair the oven, it is best to high metal front ring, and pay special attention to the old and new interface should be cleaned up. During the next furnace operation, it should open first time below the fettling interface, and so on.
(2) The refractory suppliers induction furnace mouth and throat opening is often slagging, impact erosion and burden, it need constant maintenance and repair, to ensure the normal dimensions of intermediate frequency furnace.

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The maintenance of induction furnace - continuous smelting and repair

Email: sales@ruizhirefractory.com

How to identify bentonite

Bentonite use montmorillonite as the main mineral composition of nonmetallic minerals refractory raw material.Bentonite use montmorillonite as the main mineral composition of nonmetallic minerals refractory raw material

Bentonite use montmorillonite as the main mineral composition of nonmetallic minerals refractory material raw material.Bentonite use montmorillonite as the main mineral composition of nonmetallic minerals refractory raw material, it’s also called spot to take off the rock. It’s the main mineral composition of montmorillonite, which content in 85-90%, some properties of bentonite clay are also determined by the montmorillonite. It can display a variety of color, such as yellow, green, gray, white, and so on. It can be dense patches, also be used for the loose soil, you have slippery feeling by hand grinding, small block water volume swell after several times to 20-30 times, are suspended in the much water, paste in the little water. The properties of the montmorillonite based on its chemical composition and internal structure.


To the naked eye, the identification of a high quality of refractory products bentonite is pure white, generally also have gray or pale yellow white, often because of the suction or contains impurities and was weak green, weak, rosy color, etc. Dried still is pure white, gray or pale yellow white. With the hand break after cross section is uneven, and frozen gel. Have oily luster, touching the slippery feeling. Can swell, good can become colloid. If after long-term dry moisture loss, it can become incompact again. Bentonite by a strong force of ion exchange, so it will adsorption or absorption of all sorts of color. It is mixed with oil, can make the oil glossy. Its fine powder and water suspension, dispersion (divergence) is very good, not easy to sink in. Natural bentonite clay powder type, mainly by the montmorillonite relative content is divided into the type of cation that calcium, sodium, hydrogen, lithium montmorillonite, etc., which is given priority to with calcium montmorillonite clay called calcium base bentonite.

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How to identify bentonite

Email: sales@ruizhirefractory.com

New trends of China refractory materials

New trends of China refractory materials

Refractory industry, a serious excess capacity is more prominent in the current situation. Therefore, we must resolutely control the production, firmly grasp the domestic and abroad markets. China is a large consumer of refractory material, refractory brick suppliers consumption accounts is about 60% of the total global consumption, is still the leading market for refractories. Therefore, no matter how the economic situation changes, the domestic market is still a large market for refractory consumption. At the same time, refractory production need to expand the international market.

Chinese refractory products exported to more than 150 countries and regions. It is noteworthy that Vietnam, Indonesia, the demand of refractory brick china is increasing. In 2016, the export volume of alkaline refractory materials up to 877,600 tons. refractory company  Silicate Alumina refractory material up to 662,400 tons. In this regard, refractory production and export enterprises need to stabilize the existing export market, at the same time, tracking changes of the international market timely, and further expand the market space, increase exports.

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New trends of China refractory materials

Email: sales@ruizhirefractory.com

Advantages and application of ladle covering agent

Advantages and application of ladle covering agent

Ladle covering agent adopts the composite carbon, free carbon technology to improve itself refractoriness, which makes this products with longer insulation time, small capacity, refractory company  good spread porosity, and small termal conductivity, and the net rate is even more than 90%. Also, dust float rate is small, and this refractory material don't bond to the furnace lining, especially for those high alkaline magnesia based, calcium magnesia based covering agent. ladle refractories covering agents have good effect in absorbing impurity for the alkaline magnesia and magnesia calcium type furnace lining in the processs of casting super low carbon clean steel, thus to improve the slag's stability and refractory brick china guarantee the steel quality.

Features of ladle covering agents:
1. Insulation effect is good, the molten steel temperature drop is less than 0.5 ℃ / min.
2. Proportion of it is small, ladle brick adding no steel splash, operating environment is good, pollution-free, safe, no adverse effects on the quality of molten steel.
3. Round particles, swimming is good, after the release was loose state, good spread, can quickly cover the full range of molten steel, adding no dust flying, do not pollute the environment.
4. No crust phenomenon after pouring.

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Advantages and application of ladle covering agent
Email: sales@ruizhirefractory.com

Performance and Production Process of non burned magnesia chrome brick

Magnesia chrome brick is made of some preliminary synthesis high purity raw materials. The high purity raw refractories should be high pressure formed

Do not burn magnesia chrome brick  to magnesia and chrome ore as raw materials, adding a binder to burn the refractory products, also known as chemical combination of magnesia chrome brick.


Do not burn magnesia chrome brick performance:

Does not burn the performance of magnesia chrome refractory brick china, in addition to particles and fine powder refractory raw materials, but also with the performance of the binder, the number is closely related. Compared with the same material of the refractory materials firing brick, high temperature volumetric stability slightly less sintering. Before and after the structure of the product and some of the nature of the chemical reaction and fluctuations. High temperature strength has been reduced, but the thermal shock resistance is higher.


Do not burn magnesia chrome brick production process:

Do not burn magnesia chrome fire bricks manufacturers is a different size of the magnesia and chrome ore in proportion, by adding the right amount of chemical binder, the mixing, molding, drying, low temperature and prepared. Commonly used binders are water glass, sulfate, chloride, phosphoric acid or polyphosphate and other organic binders.

Do not burn magnesia carbon bricks with iron and not including two kinds of iron, iron package in the product outsourcing a layer of iron, according to the product size made of iron, the mud into the iron box, stamped The Tie and cover are with teeth, through molding, iron into the mud material, in order to improve the iron and the product of the binding force. Iron can also be with iron ditch, clip or insert and other accessories. Production of iron shell thickness of 0.5mm, 1.0mm, 1.6mm, 2.3 mm, 3.2mm5 kinds.


Do not burn magnesia chrome brick application:

Do not burn MgO Cr brick for steelmaking furnace side wall, cement rotary kiln firing zone and other industrial furnaces. In the use of the process, the metal and magnesium sand reaction and sintering, strengthening the kiln body integrity, improve the structural strength. There is also a direct package of iron does not burn magnesite chrome bricks welded into a whole, easy to hang, the use can reduce the crack. Do not burn magnesium chrome brick production is simple, energy saving, low cost.

In addition, it should be noted that, because not burning magnesia chrome brick without high temperature firing, brick in the magnesia will occur hydration, so this refractory brick can not be long-term storage.

Yingkou Ruizhi Refractories Co., Ltd. is a professional China manufacturer of refractory material for high temperature melting furnaces.Ruizhi Refractories supply main products are: Refractory material, refractory brick, refractory castable,refractory nozzle, ceramic fiber, fire brick, insulation material, for converter, electric arc furnace, ladle, LF furnace, tundish, foundry ladle, torpedo ladle, etc. Ruizhi has established technical cooperation relationship with some refractory research institutions and universities. Ruizhi Refractories products have been exported to such as South Africa, Australia, Canada, Malaysia, Bangladesh, Iran, Saudi Arabia, UAE, Iraq, Pakistan, Philippines, Vietnam, Singapore, Tajikistan, Indonesia, South Korea, Sri Lanka, Nigeria, Kenya, Ethiopia, etc.