Refractory mortar products structure

Refractory mortar composed of fine powder and a special binder mixing and compounding, natural air drying conditions have good strength and form combined with high strength joints, eventually form similar to the integral prefabricated structure of brick masonry.

JM2600: Air hardened clay, suitable for insulating refractory brick masonry low level, can be used for applying construction method and immersion method.

BLK: an advanced refractory clay, black, water retention property is very good, is designed for lightweight brick masonry and development, but also used in the construction of heavy bricks and high alumina heavy brick. Delivery consistency is suitable for thin layer repairing and painting method construction, about 5% moisture can be applied to the impregnation method construction. For the lightweight heat insulating brick masonry construction mainly, have a small amount of heavy brick, very suitable for single selection BLK mastic.

JM3300: high temper hard clay, suitable for building JM32 insulating brick and heavy high alumina refractory brick.

It is normally provided by type barreled to wet namely, with sealed metal barrels packaging.

Introduction and using range of refractory clay

Refractory clay is also called exothermic or joint material. Used as a refractory products masonry joint material.

By materials can be divided into clay, high alumina, silica and magnesia refractory mud. Composed of refractory powder, binder and additive. Refractory raw materials can be made for almost all of the powder used to compound refractory clay. With refractory clinker powder with the appropriate amount of plastic clay as binder and plasticizer and made known the ordinary refractory clay, the room temperature strength of low, high temperature formed ceramic combination has a higher strength. In hydraulic, air hardening or hot rigid binding material as the known chemical bond binding refractory clay, below the form ceramic combined with temperature before that produce a certain chemical reaction and hardening. Grain size of refractory mortar according to use requirements vary, the ultimate particle size generally less than 1mm, and some less than 0.5mm or more fine.

The selection of refractory slurry material should be considered with the refractory products masonry material consistent. Refractory clay except for joint materials can also be used to smear method or injection method is used as a protective coating liner.

Mud properties and application of refractory: 1, plasticity is good, the construction is convenient; 2, high bond strength, anti erosion ability; 3, high refractoriness, up to 1650 – 50 Deg. C; 4, good slag resistance, invasion; 5, good thermal spalling. Refractory clay is mainly used in the coke oven, glass furnace, hot blast furnace, and other industrial furnace.

The application of industry: metallurgy, building materials, machinery, petrochemical, electric power, boiler, glass, steel, cement and other.

Properties of semi silica refractory

(1) refractory

Higher silica content of semi silica refractory products, refractory degree can reach 650 to 1710 DEG C, close to the silica brick.

(2) load softening temperature

In the semi silica refractory products, forming part of the network structure, so the load softening temperature is slightly higher than the clayey refractory products, up to 1350 to 1450 DEG C.

(3) the thermal shock stability

Semi silica refractory products than the clayey refractory products thermal shock stability slightly worse, the general water cooling times is 10 or so, the reason is quartz expansion coefficient, rapid changes of temperature, volume changes lead to local stress concentration.

(4) the slag resistance

Semi silica refractory products in the chemical nature belongs to semi acidic, so resistant to acidic slag erosion ability.

(5) the line changes heavy firing

In the semi silica refractory products, due to the expansion of high temperature contraction offset silica clay, so the volume stability, than the clayey refractory product reheating linear change.

Refractory brick classification for cement kiln

1, high aluminum brick: Al2O3 content more than 75, refractory degrees higher than clay brick, acid and alkali resistance erosion resistance, suitable for cement kiln etc., the use of long life and high price of refractory brick.

2, the dolomite brick: Hang kiln skin performance is good, good erosion resistance, but there are brick in f-CaO number, hydrated, difficult to transport and storage, production with less.

3, magnesia chrome brick: Hang kiln skin good, used for firing zone, the disadvantage is the thermal shock performance is poor, plus six price Cr is highly toxic, the production and use of magnesite chrome bricks in countries gradually reduced, now with this firebrick production unit as soon as possible to find alternatives.

4, spinel brick: mainly used for transition zone, earthquake good performance, anti good reducibility, but refractoriness slightly worse.

5, anti flaking brick: this brick contains a small amount of ZrO, martensite phase transformation occurred during the heating process of the formation of fine crack, with strong alkali resistance, spalling resistance and slag resistance of good.

6, phosphate brick: Refractory degree is low, but the intensity of heat shock resistance, used for refrigerating machine, such as the use of kiln hood.

7, silicon carbide brick: high temperature (1800 degrees, refractoriness under load in the 1620-1640), small thermal expansion coefficient, high thermal shock have good wear resistance suitable for cooling zone and kiln mouth.

8, the silicon mullite brick: thermal shock resistance, high strength, good wear resistance, suitable for transition zone.

Correct methods to select good quality refractories with low cost

High temperature industrial development cannot do without refractorymaterial function, especially in the iron and steel, nonferrous metals, glass, ceramics, cement, petrochemical, machinery, boilers, light industry, electric power, military and other fields, is the basic material of an operation and technology industrial production, with each field of industry continue to increase, the demand quantity of refractory products is also gradually increasing, which requires every manufacturer increase production, while at the same time ensuring the production quality of the product is the most critical, it is also the fundamental in all areas of normal operation. For how to choose the right refractory is introduced in following four aspects:

1 according to the structure, working characteristics and motion conditions of the furnace and the analysis of material damage reasons, in order to choose the appropriate refractory. Accurate understanding and grasp the temperature changes of all parts of the material, carefully observe the material to prevent by all kinds of destructive effects, such as: high temperature molten metal erosion.

2 familiar with the material chemical composition and physical, work performance, so as to give full play to the characteristics of material.

3 so that all parts of the furnace material reasonable match, in order to avoid the mutual damage at the same time between material, but also take measures to ensure that the service life of the whole.

4 basic principles in satisfying the conditions above, to solve the resource and cost as much as possible. Can choose prices and transport costs low material, at the same time, vigorously develop the recycling, reduce the cost of.

We Xinmi Changxing refractories plant convenient transportation, rich in resources, is the base for the production of refractory materials ideal, high-quality refractory raw materials base believe refractory products can produce satisfactory.

Synthetic mullite introduction

Mullite (Mullite) is compound in atmospheric Al2O3-SiO2 two series in the only stable, chemical formula 3Al2O3 – 2SiO2, the theory of composition of Al2O3 71.8%, SiO2 28.2%. Mullite is a mineral name, because of the moire Island Natural Minerals first discovered on the west coast of Scotland (Mull) and the name. Natural mullite mineral is very small, Lin County of China’s Wuan County in Hebei province and Henan province has been found, but so far the world has yet no industrial value of the deposit. Mullite artificial synthetic stone commonly used sintering method or electric melting method. Synthesis of mullite in 1926 and the first with electric melting method, in 1928 the successful development of sintering method. Currently the world’s electric melting mullite consumed 10000~20000 tons, 500000~600000 tons of sintered mullite. Synthesis of mullite is a high-quality refractory raw material; it has the expansion uniformity, thermal shock stability, excellent high load softening point, high temperature creep value characteristics of small, high hardness, resistance to chemical corrosion and good.

Structure of refractory brick can also cause brick burst

Structure of refractory bricks will burst and its product itself also has the very big relations. Refractory brick thermal spalling, refers to the subject of the refractory brick thermal shock, in refractory brick surface and internal temperature difference, because of differences in thepresence of internal expansion, leading to refractory brick masonry produce stress, when the stress accumulation caused to a certain extent is the heat burst. So, cause the refractory brick thermal spalling reason which to have:

1, silica brick mineral phases such as quartz, tridymite, cristobalite, due to the temperature change and also accompanied by quartz crystal type conversion, volume change, so the heating or cooling brick masonry structure, the need to pay particular attention to the problem of thermal explosion.

2, magnesia brick and magnesia chrome brick, because its thermal expansion coefficient is larger, the thermal decrepitating temperature mutation is also easy to produce refractory brick.

3, insulating refractory brick, because of its low thermal conductivity, the temperature gradient in brick, and because of its relatively low strength, so it is also easy to produce hot crack problems.

As the introduction, is it right? Ofrefractory bricks have a further understanding of it; the content above is only for your reference, the specific reasons but also according to the specific circumstances to determine. More detailed content of http://www.yilongrefractory.com