Q:Detailed description of magnesia dolomite refractory material?

The use of low chromium or chrome free refractories is more and more widely used, developed countries in the development of chrome free refractories to replace the chromium containing material, through research and production practice show that dolomite refractories is the refining of AOD furnace, large cement kiln ideal material.

Q:What is the limit of fireproof rolling shutter?

Fire proof door can be divided into Serie A, B and C in terms of fire endurance limit, fire resisting limit are not should be less than 1.20h, 0.90h and 0.60h. Set firewall has difficult sites can use fire shutter fire partition separating, when the back fire surface temperature rise refractory limit determination conditions of fire shutter, the fire resistant limit not less than 3H; when employed does not include back fire surface temperature rise do fireproof limit determination conditions of fireproof rolling curtain, on both sides of the shutter should be set up a separate closed type automatic water spraying system protection, sprinkler system continuation of time should not be less than three hours.

Q:how does the fire endurance of first rate fire resistant window?

Not less than 1.5 hours

Q:How can the furnace be replaced after the gasifier or water wall is replaced with refractory material?

The simplest is to find a refractory construction unit, should provide you with oven curve.

Q:How to divide fire rating of decorating materials ?

Decorating materials shall be divided into four levels according to combustibility. Level A: noninflammability; B1: difficult-flammability; B2: combustibility; B3: inflammability.

Q:Firing high temperature kiln of refractory and internal temperature being as high as 1600 ℃, metal heat exchanger can't use, how to do?

Directly using silicon molybdenum kiln, the temperature is better. Now using the electricity is cheaper than the price of other fuels.

Q:what is the material of fixed first rate fire resistant window?

Window frames and fireproofing glass, fire sealing strip, fireproofing glass mound layer, which is infexible fan, and the flexible fans have to plus folding and closing window cleaner. (3) window frames must be integral with the building, using wood or iron to connect the wall. After the installation of the steel frame, the cement mortar must be watered between the window frame and the wall, and it should conserve more than 24 hours before normal use.

Q:What is the fire endurance of fireproof glass cotton?

of course,A level is better. A-class is non-combustible, class B is fire retardant, rock wool fire resistance is 800 ℃, glass wool fire resistance is 450 ℃ , class B has a relatively better thermal insulation effect, hope it can solve your doubts.

Q:What are the new refractories? What are the features? How about their application and development?

In metallurgy, in what position should it be used, in order to make the best. Answers are as following. In iron, steelmaking or converter. When questioning, pay attention to the ways. Answers: Try to use synthetic refractory materials.

Q:What is the importance of silicon powder in refractory processing?

it depends on the type of refractory material, in addition to lS friends talked about, in the amorphous mobility&#92 strength should also have an impact