SU1625844A1 - Starting mixture for producing expanded clay aggregate - Google Patents

Description

The invention relates to compositions for the manufacture of expanded clay and can be used in the building materials industry.

The purpose of the invention is to reduce the bulk density of claydite, increase its homogeneity, reduce fuel and energy costs.

For the manufacture of the mixture, waste incineration of high ash fuel in low-temperature fluidized bed furnaces, slag and an organic additive are used. As an organic additive, sulfite-alcohol bard with a density of 1.06 g / cm or an acidic tar containing 50-60% of organic matter o

The waste of low-temperature combustion of high-ash fuel topchl of the fluidized bed is xo-i

Horn burned at relatively low temperatures (800-10JOЈC) is a mineral component of coal and is easily splashed material with a particle size of up to 15-20 mm.

Chemical and mineralogical, the composition of the components is given in g bl. one.

For the manufacture of ket meit, a part of the additive (50%) is mixed with the raw material with a mixture, the rest is introduced directly into the dish tray. The resulting granules are dried in a gaternoi dryer to less than 5% moisture, heated to a temperature of 600 ° C and maintained for 2C Mini. Then, the granules are fired in a laboratory raving furnace at a firing temperature of 11UO-1150 ° C. Into the furnace, opud is fed into the furnace (quartz glass) in the colorest5 N5 SL

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4i

be 0.5% by weight of the feed material. The cooling of the expanded granules is carried out in air.

The compositions of the raw material mixtures and properties of expanded clay are given in table. 2 „

As can be seen from the data table. 2, at the specified ratio of the components of the proposed raw mix, a aggregate with a lower bulk density than that known is obtained.

The use of the proposed mixture allows to reduce the consumption of high-quality fuel required for drying the spike before milling, due to the use of part of the gases obtained from the combustion of high-grade fuels in low-temperature fluidized bed furnaces. The remainder of the gases can be used to heat the granules. The combined grinding of the charge, consisting of slag and easily-crushed waste, makes it possible to sharply reduce the abrasive wear of the grinding equipment and reduce the downtime associated with its repair. As a result, an increase in the productivity of the process is provided. Increase uniformity over

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five

the filler is provided by using a homogeneous, instead of a heterogeneous ash-slag mixture, primarily in the carbon content of the component.

Claims (1)

Invention Formula Raw mix for the manufacture of expanded clay, including slag TPP, mineral component and organic additive, characterized in that, in order to reduce the bulk density of expanded clay, increase its homogeneity and reduce fuel and energy costs, it contains as a mineral component waste low-temperature combustion fluidized bed furnaces in the following ratio of components, wt.%: Shpak TES25-60 Waste low-temperature fuel-bed combustion 38-70 Organic additive2-5 Table. one Waste low-temperature fuel combustion in boiling furnaces The content of components, wt.%: waste of high-ash fuel in a low-temperature fluidized bed furnace, slag table 2 70 25 50 ke Indicators for composition I ash Add or sour tar2 Bulk density of claydite, kg / m 380 Continuation of table 2 3,5 330 5,425 famous 45 5,590