Kinds Of Magnesia Chrome Bricks

There are three main kinds of magnesia chrome bricks produced in Rongsheng for industrial purposes. Typically these bricks are finding great use in environments where pressure and also heat resistance are crucial properties to obtain, for example in furnaces. Herein will be the three varieties of bricks, their specific properties, and also the environment through which one can use them.

#1. Sintered Magnesia Chrome Bricks – Sintered magnesia chrome bricks are made of sintered magnesia and chrome ore. The materials are sintered at high temperatures to yield magnesia bricks with temperature resistance. Besides the strong thermal resistance from the bricks, magnesia bricks likewise have high bulk densities.

The above qualities create the bricks prime for use in cement rotary kilns, permanent lining in steel furnaces, glass kiln regenerators, and also as permanent lining in refining ladle.

#2. Direct-Bonded Magnesia Chrome Bricks – The output of direct-bonded magnesia bricks uses high purity magnesia sand and minimize impurity chrome ore since the raw materials. Magnesia Chrome Bricks manufacturing process involves heating the fabric to temperatures above 1700℃, causing magnesia bricks that have a great potential to deal with temperatures.

Additionally, the brick attains strong slag resistance and a strong potential to deal with corrosions, especially corrosion from the cement clinker. Because of these characteristics, direct-bonded magnesia chrome bricks are employed in rotary kilns, non-ferrous metal furnaces, and electric arc furnaces.

#3. Rebonded Magnesia Chrome Brick – Rebonded magnesia chrome bricks use all or partial electric melting sand as the main raw material. The manufacturing process involves the molding under high pressure and high temperatures to give rise to thermal resistance.

Rebonded magnesia chrome bricks are commonly used in VOD furnaces, AOD furnaces, and then in snorkels of RH furnaces. These bricks may also be used in non-ferrous metallurgical furnaces owing to good binding properties and also the high strength of the bricks.

Additionally there is another kind of varieties of kilnrefractory.com/magnesia-chrome-brick closely relevant to the reboned magnesia chrome bricks – the semi-rebonded bricks.

SELECT THE PERFECT BINDER FOR SHAPED REFRACTORY BRICKS MANUFACTURING

Generally, refractories are classified as basic, high alumina/silica, fireclay and insulating. There are also classes of “special refractories” which include Silicon Carbide, Silicon Nitride, Graphite (rongshengrefractory.com/graphite-blocks-for-sale), Zircon, Zirconia, fused cast and several others. Most refractory materials are supplied as preformed shapes by manufacturer. However, they also are manufactured in the form of special purpose clays, bonding mortars and monolithic such as castable, plastic refractories, ramming mixes and gunning mixes. In fact, many  refractories materials have been developed specifically to meet the service conditions of a particular process. The characteristic properties of each refractory class are a function of both their raw material base and the methods used to manufacture the refractory products.

Shaped Refractory manufacturing involves five processes: raw material processing, raw material mixing, forming, drying and firing. Another types of refractory processes also warrant discussion - the first is production of fused products and the second is ceramic fiber production.

For the shaped refractory, forming consists of mixing the raw materials and forming them into the desired shapes. The forming process is a big challenge for shape refractories producer (See  Fig.1) because refractory raw materials are almost non plastic materials and  they are not bonded with each other at low temperature even if this process frequently occurs under wet or moist conditions. Therefore  most  refractory producers have to press with very high pressing pressure, control the packing curve of all raw material to obtain the  highest density and have to use binder in their forming process to avoid breakage and chipping before achieving the  ceramic bond after firing.

There are many kinds of binders for shaped refractory to improve compressive strength for pressing, handling and drying processes to avoid breakage and chipping such as Phenolic Resin, Polyvinyl Alcohol (PVA), Dextrin, Starch, Lignosulfonate, Molasses, Carboxyl Methyl Cellulose (CMC) etc. So, binder selection  can be very challenging and producers have to consider  many parameters to ensure  what kind of binder is suitable for their product and process.

Some of the parameters to consider are as below:

• Refractory bricks.png
• Type of refractory
• Mixing technology
• Pressing process
• Size and shape of brick
• Drying process
• Handling process
• Firing process

The best binder must have several characteristics:

• It must be easy to add and mix with a refractory aggregate
• It does not react with refractory mixes at low and high temperature
• It must leave a minimal amount of residue after firing
• It must easily burn out at during the firing process
• It does not affect the  Bulk Density and Apparent Porosity after pressing, drying and firing
• It must improve the mechanical strength of green and dry bricks
• It must improve flow ability of mixes during pressing to get consistent density in whole bricks
• It does not affect the permanent linear change of bricks
• It does not cause the mixes to stick to the moulds
• It cannot be toxic and cause of air pollution
• It does not affect the refractoriness of the bricks
• It must be as inexpensive as possible

There are no all-in-one binders. The selection of a suitable binder is key to increase a production yield and saving operation cost for refractory producers.

Biopolymer binders offer a unique range of solutions for process and quality improvement. We have developed additives specific  to the manufacturing of hydraulic pressed bricks, plastic shaped bricks and other unshaped refractory products. Our natural products have a neutral CO2 footprint, are environmentally friendly and non-hazardous.

Possible benefits during Process:

• Improved workability and handling of refractory mixes
• Reduction of pressing friction for dry pressed bricks
• Improved mechanical strength of green and dry bricks
• Increased plasticity for extruded bricks
• Lubrication during forming process
• Energy saving
• Reduced losses during handling and drying process
• Process and quality improvement

Lastly,  it is very important to have the opinion of experts in the field and test thoroughly the results obtained in order to select the best binder possible for your specific production process.

How To Get The Best Prices On Castable Refractory Cement?

If you are thinking of almost any new construction, you possess already thought about the necessity for high aluminum cement. With the demand for this particular cement comes the necessity for money. Occasionally, lots of this cement will be found it necessary to complete the project. If you are on the limited budget, you want your construction dollars to travel in terms of possible. Knowing that, there exists a few tips that you will need to bear in mind when searching for the ideal castable refractory cement price.

One of the first things it is advisable to do is search for a local supplier. This is amongst the best things you can do to keep costs down. If you select to do business with a local supplier of high aluminum cement, there will not be this sort of high price of delivery. In addition, when you find yourself employing a local supplier, they are concerned about their overall reputation inside the town or city they serve. Bearing this in mind, you are always getting the est quality cement as it helps their business grow and prosper too.

However, a large number of individuals belong to the same trap when evaluating the best prices on cement. They will visit the supplier who can offer them the lowest price. Now while you need to save money, you do not wish to sacrifice on the  expertise of the material. So make certain you are working with a reputable supplier and one which has established roots inside the city. You can always search the web for virtually any available ratings or reviews to see how they are being a high-quality aluminum cement supplier.