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UPSC CDS exam II expected cut off marks results 2014

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by jaatresult.in on Apr 17, 2016

How to distinguish the quality of the refractory brick

In general, according to the contents of various chemical compositions and their functions, it is divided into three categories, which are the main components, impurities, and the added ingredients. The main component of the refractory brick is the m...

Introduction and usage range of refractory clay

Also called fireclay refractory mud or joint material. Supplementary materials for masonry of refractory products. According to the material can be divided into clay, high alumina, and silica and magnesia refractory mud. Made of refractory powder, bi...

Air permeability of refractory

Air permeability is the performance of the material under the pressure difference to allow the gas to pass. Because gas is through the material through the hole through, the permeability and the size, quantity, structure and state of the hole, and wi...

How to choose the different parts of the refractory lining of blast furnace

In the process of production and in the selection of various parts of the refractory lining, should follow the principle is: the refractory lining to correspond to the parts of the heat flow intensity, to keep under the impact of strong heat and lini...

Production process of high alumina brick

It is well known that high alumina brick is one of the most widely used refractory materials, and high alumina bricks and clay bricks are the same as the basic same method. The process of crushing, mixing, molding, drying, sintering, and testing, pac...

Requirements of refractory materials for blast furnace lining repair

Furnace lining maintenance method generally speaking, there are grouting lining, cold spray technology, furnace shell hole opening technology and remote control technology. Grouting lining technology can be widely used for the focus of a short-term f...

What is the high aluminum cement castable

The main mineral of high alumina cement as calcium aluminate (CA), the hydration speed, and precipitation of calcium hydroxide. Therefore, high alumina cement prepared with the characteristics of the fire resistance of the fast hardening and high str...

The reason for surface cracks of refractory bricks after used a period of time

Although the fire brick is good, the structure is relatively stable, but the  refractory  brick used for a period of time, some customers reflect the surface of the refractory brick cracks, which is what causes it? After many years of research and...

How to control the volume stability of refractory materials

Because of the non setting refractory material is used in the field of baking and burning, will appear dry shrinkage and firing shrinkage. It is necessary to consider the measures to compensate the shrinkage in the design of composition, that is, the...

Detailed requirements and working conditions of ladle refractories

Ladle is the necessary equipment to carry out the molten steel, continuous casting. Due to the many kinds of steel in the ladle refining process, including argon blowing temperature, alloy composition adjustment, injection refining and vacuum process...

Synthesis of mullite

Synthesis of mullite raw refractory material preparation is divided into dry and wet. The main rotary kiln and tunnel kiln. Dry process is the batch mixture into the ball mill or a mixing machine to mix together, after the ball or compacting pressur...

Refractory brick patching principle

Fire bricks used a certain degree of damage to the phenomenon, there will be a problem to repair and that in the fire brick problems in repair, and we should follow the principle: 1 refractory brick must be used with the same factory as the same manu...

The main factor of refractory high temperature creep

The factors that affect the high temperature creep of refractory are many, and many factors are interrelated… The main factors that affect the creep deformation of refractory are the following: 1, refractory material, including: chemical compos...

The production process of refractory materials

According to the product and density of the different shape, sintering method, casting and melt blowing process. The sintering process is part of the raw material will burn in mature, crushing and screening, and then according to a certain ratio and...

New type refractory coatings improve furnace life 3 times

High temperature furnace refractory castable, including insulating brick, metal, ceramic, refractory fiber, quartz sand, silicon carbide, quartz glass. High temperature furnace refractory material in high temperature, high temperature resistance, oxi...

The characteristics of refractory fiber

1 high temperature resistant. The highest use temperature up to 1250~2500 degrees. The most commonly used asbestos is only 500~550 degrees, 580~830 degrees C and slag wool, aluminum silicate fiber reaches more than 1000 DEG C. 2 conductivity is low.

Methods to decrease the porosity rate of refractory brick

Production of refractory  brick  is always encountered too many holes, how can we reduce the occurrence of this situation? Today we shall all requirements to introduce how to reduce the rate of porosity of refractory brick. Selection of high densit...

Refractory materials mainly used what place

Refractory material is the basis of materials in the field of high temperature technology. Department of applied very widely. Which is the most widely used in a variety of thermal equipment and high temperature in the container as resistance to high...

Changxing IF furnace ramming material advantage

Now, no matter what kind of industry, everyone can see, there are a lot of new products appear in everyone’s attention, let the life of people is very good, like the Changxing IF furnace ramming material is one of them, but after the market lea...


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