Fireclay refractory powders and other types of

Where does fireclay powder?

Kaolin or white fire clay, is formed naturally when the erosion of granite and other rocks, as part of which the feldspars are present.It is the latter, and is a fundamental principle of natural kaolin.It is derived from the place where the white clay was first discovered in color with high refractory performance - in China, Jiangxi Province, the area has a Kaolin, which means "high hill".Possessing extremely fine structure, providing the perfect fireclay powder material in high demand in many areas of production, including the manufacture of paints, varnishes, adhesives.But the greatest value, he is in the manufacture of refractory compounds.

Fireclay filler is divided into three grain size index: crushed stone (krupnofraktsionny), sand (small fraction) and powder of mill ground additive.

must first clean kaolin from foreign impurities, which include particles of rock and silica sand, which is in the firing process can turn into a glass beading.Then, at a temperature of 1300 to 1500 degrees in special furnaces kaolin calcined to complete loss of ductility, meaning that only the clay contained in the evaporated moisture content of 1%.Then the sintered pellets are ground to give a fireclay sand different size fractions, which is then sieved to obtain uniform particle diameter.You can also be obtained by grinding chamotte refractory bricks battlefield made from white kaolin clay.

Fireclay refractory brick or stone

When the fire is burning in the oven, the temperature inside can reach 1200 degrees, and not every brick will withstand this heat.In addition, the clutch must withstand temperature extremes.That is why most Pechnikov chooses for the construction of fireplaces and stoves, fireclay stone.In fact, it is nothing like refractory bricks, though made of kaolin and decorative tiles.It is noteworthy that its natural color white clay keeps on firing up to 1200 degrees.Further, when the temperature rises up to 1300, there is a "rosy" painting, but at 1350 degrees and above, along with a stable brown color begins to change the geometry of the product, due to warping.Brick may even tighten the screws or die arc.

In the manufacture of building blocks and slabs used fireclay clay with the same sand. or river quartz filler fraction can replace burnt particulate kaolin because quartz has a property of expanding at high temperatures, leading to the destruction of the brick. As for river sand, then his grip with chamotte clay will be insufficient due to the flattened shape of the particles.Plastic white clay, along with that part of the mixture of fireclay baby - this is the best combination, which provides a stone building which can withstand repeated heating and cooling without loss of quality indicators.Brick is made of any shape, including the wedge, so necessary for the masonry arches oven chambers.

Fireclay mortar for masonry - the choice is always

To get the right solution for work, you can use far not crushed any grog, you must select the desired mark.The fact that in addition to the magnitude of fractions of sand or grit-burned white clay also classified according to the degree of fire resistance.Thus ZSHA stamp must have heat resistance of not lower limit 1,690 degrees, fireclay aggregate ZSHB - not less than 1630. In addition, the material obtained by pulverizing a specially prepared and fired briquettes or crushed kaolin grinding the bricks used.In the latter case, the labeling may be on the bag, "y", otherwise - "recycled", fireclay solution with the filler can not be used in mission-critical operations.Various

mixture with kaolin as an essential component used for masonry fireplaces and stoves, as well as for their interior wash.Thus the compositions may be different. example, 1 part white clay and 2 parts sand refractory particles with a diameter less than 0.5 mm - a solution ideal for masonry. Another option - kaolin clay - 1 part, blue Cambrian clay - Part 1, Fireclay sand (0.5 mm) - 4 parts.In some cases, to obtain high-strength products of the Portland cement is added, however, fireclay concrete will have a relatively low maximum fire resistance, about 1550 degrees.