Features of refractory fibers

1. High temperature.

The highest use temperature up to 1250~2500 DEG C. The most commonly used asbestos only 500~550 DEG C, slag wool is 580~830 DEG C, and aluminum silicate fiber above 1000 degrees.

2. Heat capacity is low.

Refractory fiber under high temperature heat conduction ability is very low, such as 1000 DEG C, conductivity of aluminium silicate fiber is only 20% light clay brick, clay brick 38%.

3. Small volume density.

Usually 0.1~0.2g/cm fand, general clay brick for 1/20~1/10, 1/10~1/5 light clay brick. Therefore, application of refractory fiber industrial furnace instead of refractory bricks, which can make the furnace body weight, furnace wall thickness. If the heating furnace using fiber lining reduces 80%, furnace wall thickness of 50%.

4. Good chemical stability.

In addition to alkali, fluoride, sulphate, erosion is almost unaffected by chemicals.

5. Good thermal shock resistances.

Both fiber materials and products of refractory brick, has the incomparable good thermalshock resistance.

6 low thermal capacity.

1/72 heat capacity of the fiber material only refractory brick, light clay brick 1/42.Refractory fiber lining for storage, loss is small, fuel saving, fast temperature rise, the intermittent operation furnace affection is obvious.

7. Soft, easy processing.

Can be made into a variety of products and personnel shape parts, construction is convenient, the labor intensity is low, the effect is good.

Refractory castable using validity period and size selection

一、Using effective period

Need watering tie with monolithic refractories, such as high temperature cement, refractory plastic, refractory castable, etc., must be checked before use its expiry date. Exceeds the material period, its performance will decline.

Unpacking refractory castable pocket, be sure to carefully view the manufacture date on the bag. Such as alumina cement shelf life of 3 to 6 months, cement vulnerable to air humidity during storage and transport and curdle, must be strictly checked.

Refractory soft plastic blank group, due to solidification into lumps, you can not using.

二、Granularity refractory castable

Refractory castable granularity shape, strength, size and composition, the quality of the masonry has a very important influence.

Check granularity shape, generally use visual methods. Such as knotted crucible induction furnace lining was prismatic granularity best with sharp corners. Check granularity intensity can be struck with a wooden hammer, watching the situation to determine its smash.

Check the size and composition of the particle size, the use of screening method. Sieving is carried out in the test chamber, which can be measured by the percentage of various particle size of the composition.

First check pattern according to the technical requirements of the stove on, pay attention to the size of the maximum size limits, and secondly to fire clay should be careful not lost too many fine parts, so as not to reduce its masonry performance.

Notes on using anhydrous stemming

The anhydrous stemming mainly used in tadpole, but out of the mouth of the clay gun susceptible to iron slag erosion and chemical erosion, caused by the slag iron out not only, but also prone to iron mouth fracture, leading to iron out the tadpole accident. So we in the use of anhydrous stemming must pay attention to:

1, pay attention to insulation. The general insulation at 20-60 degrees Celsius advisable, winter use the gun mud roasted in the fire soft use beside the gun can be used, after baking gun measures 2, do not mix with water use, not to install mud gun water, performance or lost anhydrous stemming.

3, to change the mud to bore in the clean water stemming, clay loading quantity according to the requirements of the iron mouth, usually with water stemming amount of 1/5 or 1/4, that is 80-120 kg.

4, open iron, iron mouth eye size should be appropriate, to ensure that the tapping time, generally for diameter should be 60-80 mm.

5, plugging tadpole, don’t immediately returned gun, 10-20 minutes back gun, in order to prevent iron mouth blown open.

6, the use of water stemming, manufacturers can also be treated according to its own characteristics, in order to maintain taphole, ensure safety in production.

How to remove the refractory on the castable furnace

Castable after prolonged contact with thermal furnace wall, they will have chemical reaction, penetrate the lining, causing damage or corrosion of furnace lining, then how to deal with the furnace refractory castable on a lot of people became troublesome problems. Today, our experts will give you a brief introduction on the furnace refractory castable removal methods.

When removing the refractory castable, we must first understand the environment and the surrounding thermal furnace refractory castable life. In the demolition process refractorycastable, we should be careful not to make dust, debris, and other impurities mixed adhesion refractory castable, in order to avoid physical and chemical reaction to produce other good clean impurities. Moreover, we need to dismantle down the different categories of refractory castable, remember not to arbitrarily debris piled together. Construction workers also pay attention to put a dust mask or respirator when removing refractory castable avoids debris into the eyes, nose and mouth.

Here, we simply introduce a bit on the furnace castable refractory removal method, if you want a better understanding on the furnace refractory castable removal methods, you can log on to our website can also call our service sales Hotline.