SU948971A1 - Batch for making light-weight refractories - Google Patents

Description

one

The invention relates to construction materials, in particular to the production of refractories, and can be used for the manufacture of lightweight refractory materials and materials used for high-temperature thermal installations.

The known composition of the mixture is the manufacture of lightweight refractories ClJ containing, wt.%:

Polystyrene granules6-12

Aluminum Powder 20-40

Aluminum powder5O-7O.

Products made from such a composition have low mechanical strength (6 j, ZO-4O kg / cm), which does not allow the use of this material for the manufacture of critical designs of refractory products for thermal furnaces capable of carrying the working load at high temperatures.

The known charge for the manufacture of lightweight refractories, including technical alumina, chalk and pitch coke.

The disadvantage of this mixture is low strength.

The closest to the invention is the Shiksha OLA manufactured Cz lightweight refractories, including the following components, weight,%:

Technical Alumina76-78

Penopolistrolrol6-8

Sulfite Yeast

mash0,5-1

ten

Water 10-16,5

Aluminum oxychloride 1-3

However, products made from this mixture have low mechanical strength (kg / cm), which does not allow them to be used in loaded areas of industrial thermal installations.

The aim of the invention is to increase

20 mechanical strength

The goal is achieved by the fact that the 4th charge for the manufacture of lightweight refractories, including alumina and polystyrene foam, contains burnt alumina fractions - O, Ot-6O µm and 5O-2OO microns and additionally - synthetic mullite with a cnejVKMueM ratio of comtesters, about, 1 Glow, and a synthetic mullite ratio of ctnVKMueM ratio of comtests, about, 1 Full

(} Akpi O, 0 1-eO micron 25-35 4 shares 5О-2ОО micron 2О-25 Styrofoam 20-35

Synthetic mullite15-25

For the manufacture of the charge, use is made of Styrofoam fraction 0, mm with a bulk weight of O, OZ-Yu, O5 g / cm and mullite with a grain size of 0, OO1-1 mm.

The mixture is prepared in a sledukadim manner. The dried components are taken in a predetermined ratio and loaded into a ball mill, in which they are mixed for 1O minutes.

Prefabricated products are made by pressing or vibroforming from a mass consisting of the specified composition of the charge, and an injected plasticizer (sulfite-alcohol bard) in an amount of 15-25 wt.%.

From the semifinished product, it is dried to a moisture content of not 1%, then burned at 1700-1730 0.

In the table, three proposed s (x: tach mixtures) are given as examples and the physical and technical properties of the samples made from these compositions are presented.

As can be seen from the table, the products made from the proposed shyusts have a higher strength than the products prepared from the known charge.

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Claims (1)

Claims of invention 50-2OO microns 20-25 The mixture for the manufacture of lightweight Polystyrene 2-35 refractories, vlyuchak py alumina and pinot. Mullite synthetic 15-25 polystyro; different topics. sources of information, that for the purpose of enhancing. mechanical pro-5printye into account during the examination ally, it is sourced with alumina burned-i. Copyright USSR USSR Noah fraction 0, О1-6О microns and 5О-2ОО micron М 609739, cl. C O4 To 35 / U, 1975. and additionally - mullite sintetotesky2. Author's Inscription USSR when the slurry ratio of the components, Nr 62148, cl, C O4 B 35/10, 1976, about%: 103. USSR author's certificate Burned alumina number 737384, cl. C O4 B 2 1 / OO, 1978 fraction 0, O1-60 microns 25-35 (prototype).