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 composition, mineral composition (single phase or multiphase), microstructure.

2, the outside conditions in effect, including: temperature, load, and time, atmosphere (oxidative or reductive).

3, the chemical mineral composition and microstructure of refractory materials determine the creep resistance of the materials.

4, in phase composition to determine the basic conditions, high bulk density, compressive strength, porosity low refractory products, creep resistance is better, but with the increase of temperature and time increase, refractory material stress will be increased creep deformation will increase.

Experts teach you how to distinguish the quality of refractory brick

Xinmi Changxing refractories experts teach you to identify the quality of refractory brick:

In general, according to the contents of various chemical constituents in the refractory brick and its role, it is divided into three categories of main ingredients, impurities and added ingredients.

The main ingredient in the refractory brick is the majority of the material, and the chemical composition of the high temperature character of the material is decisive… Why refractory brick can have excellent resistance to the high temperature effect, and many refractory materials and each characteristic? Completely or basically according to the contents of various chemical components in the refractory and its role, it is usually divided into three types of main components, impurities and the added ingredients.

Impurities are those in refractory material in different principal component, content of fractional and high heat resistance properties of the refractory often bring the harm of chemical composition. This chemical composition is carried from the raw material containing the main ingredients…

The main ingredient in the refractory brick is the majority, and the chemical constituents of the high temperature properties of the material are decisive… The reason why the refractory brick has good resistance to high temperature, and many refractory materials also eachcharacteristic, completely or basically depends on the principal components. Therefore, the main ingredients of refractory must be fully paid attention to. Usually on refractory materials according to the chemical composition and classification, and on many of the same material refractory material is divided into several levels, is mostly according to the main components of the kinds and content of the amount. Can be used as refractory materials are main components with a high melting point high lattice energy or high temperature decomposition of elements or compounds.

The price of fire brick should be based on your output, the type of refractory brick, and other factors to determine the type of fire brick, can determine the price of fire brick.

Definition and application of refractory ball

Refractory ceramic balls refractory ball in alumina industry and refractory kaolin as the main raw material, scientific formula, made of forming and high temperature firing, it has 1 high mechanical strength, long life cycle; 2. Good chemical stability, and the material is not a chemical reaction; 3. High temperature resistant performance is good; the highest temperature heat-resistant ceramic balls refractory can reach 1900. Especially in the fertilizer plant of high and low temperature transformation furnace, reformer, hydrogenation, desulfurization tank and machination furnace, dispersed liquid, gas and support, to cover and protect the catalyst role. Refractory porcelain ball can also be used in the iron and steel industry hot air stove and heating converter equipment.

Refractory ceramic balls into resistant to ordinary ball and high aluminum refractory ball, ordinary refractory ball used in sulfuric acid and fertilizer industries converter and transform furnace, high aluminum refractory ball is suitable for industries such as steel, urea, hot blast furnace, heating and transformation furnace and other equipment.

Acceptance of clay refractory brick

Acceptance of fireclay brick works, to carefully check the flue; furnace stare in the firebrick, particular attention should be paid to the vault, single arch, the bottom of the device. The next small series will give you a detailed introduction:
1, in masonry clay refractory brick, the use of refractory materials and mud, according to thegrade, etc., the ingredients and level must be consistent with technical conditions and drawings;
2, to ensure the good quality of masonry fireclay bricks, also is to follow the wrong sewing, levelness and verticality, the mortar joint thickness corresponding to a standard, size and drawings with.
3, in the process of acceptance of the furnace body, the assigned responsible for the assistant director of the workshop must personally from above, according to each part of the examination of the furnace body, a few gray seam thickness inspection, the size of the measurement according to the approval certificate of admission furnace body parts, carefully check the furnace body of many important structure of masonry.
The above is the acceptance of the acceptance of the clay refractory brick, for your reference, and hope that you will help, if you need to buy, please contact us!

Brick size selection guide

There are a lot of people in the furnace construction and repair, for the use of what kind of refractory brick is a fog, the reason is very simple is because there are too many types of refractory brick, if is the standard types of refractory brick is still relatively good procurement, if special-shaped firebrick to want to find they need models, it is not easy, below I sales firebrick of 10 years of experience in the explain refractory brick how to choose!

Buy Bricks should first look at a simple type of refractory bricks, refractory bricks GB main models:

T-3 size: 230mmx114mmx65mm

T-38 size: 230mmx114mmx65/55mm

T-39 size: 230mmx114mmx65/45mm

T-19 size: 230mmx65/55mmx114mm

T-20 size: 230mmx65/45mmx114mm

Brick half pieces: size: 230mmx114mmx30mm

Five pieces of flat brick: size: 570mmx230mmx65mm

Above refractory brick is the most commonly used types and GB, there are several refractory brick types such as: half gold bars, seven separately, camber angle of refractory brick, flat six medals, etc., in furnace construction are long used.

The count of refractory bricks in the boiler construction and how to use, repair or construction of flue, firewall must be used refractory brick is T-3 refractory brick, the brick also called standard brick, masonry arch kiln or furnace in circular or door is refractory bricks must be used is T-38, T-39, T-19, T-20, this is not to be used in several kinds of refractory bricks, but 1-2 can be selected according to the size of the diameter of the furnace, used brick half pieces to stove in the kitchen equipment in the flue, the refractory brick in the construction, Roasted Duck furnace is to use large brick flat five, flat six, the above is only a few commonly used refractory brick the shopping guide, do a simple introduction, if unknown place, can call the toll free telephone consultation or contact us ‘http://www.chinafirebrick.com’.

The difference between the spinel brick and silicon mullite brick

This is the two kinds of products: silicon refractory mullite brick, mullite bricks should be. The main component is aluminum and silicon, crystalline mullite to A3S2 (3AL2O3.2SIO2). The main ingredient is magnesium spinel or spinel, namely MGO and Al2O3.

Mullite brick belongs to the silicon aluminum brick, the main characteristic is thermal expansion coefficient is low, good resistance to thermal shock, resistance to wear and chemical corrosion resistance.

Belong to the mg Al spinel brick brick, is the main characteristics of anti erosion ability,refractory material, good abrasion resistance, good heat shock stability. Their bulk density higher than mullite stoned. However, there are problems of spinel water, may react with steam powder. In this sense, the mullite is more stable.

What is said above the silicon mullite brick has many advantages, but we choose to forget a little, it is the main cause of low thermal conductivity! Refractory materials but resistance to chemical attack ability is not very good, also thermal shock is not very good, for the following reasons, pressure and thermal shock is inverse proportion relationship.

The main characteristics of spinel brick is resistance to mechanical stress better, refractory material is suitable for use in near tyre. For the water problems in the above posts have said, please note that the coefficient of thermal conductivity!

Clay brick appear “black” or “red” reasons

Clay brick firing, sometimes a “black” or “red” waste. The reason there is no consensus clear. That is due to lack of oxidizing atmosphere, and firing caused by excessive. Brick kiln firing process, if the lack of organic matter oxidation atmosphere, the brick at the beginning beforesintering to oxidation burn, will make the sintering products inside showed different degrees of black, red. In addition, iron, titanium impurities contained in the brick, in the original fast atmosphere, reducing from high valence oxide into low oxide, also can make the products inside is black or brown green. When the firebrick appear after firing this kind of situation, often used in the production of: enhanced oxidation atmosphere in the kiln, to keep the adobe oxidizing atmosphere longer and give a full 600 to 1000 DEG C; or adjust the kiln method, increase tile surface oxidized area, make direct contact with the flame of the green area increases, improve the effect of oxidation.