SU1299997A1 - Method for producing lightweight aggregate - Google Patents

Abstract

The invention relates to the field of manufacturing; building materials and can be used in the manufacture of lightweight fillings, such as expanded clay, obtained by burning in a rotary kiln. To reduce the bulk density of the aggregate and the consumption of dusting powder, the latter, with a moisture content of 1–20%, is placed in a combustible shell, and the delivery is carried out by a propelling device. 1 ill., 1 tab. CO with so

Description

The invention relates to the production of building materials and can be used in the manufacture of lightweight aggregate, such as expanded clay, obtained by firing in a rotary kiln,

The purpose of the invention is to reduce the bulk density of the aggregate and the consumption of dusting powder.

the medium in the intergranular space of the granules, contributing to the increase in their swelling, is scattered and distributed over the entire volume of the calcined granular material. In this case, an excessive amount of dusting material is formed in its intergranular space, which, when the zone of expansion is reached, allows the method of producing light weight to be distributed evenly and, in the required colinitel, includes burning of the pellets and a periodic supply of the powdering powder to the zone of rotation of the rotary kiln, powder with

honestly dusting the bakeable material.

Specific examples of the implementation of the method and indicators of the properties of 1–20% of the moisture content are placed in a combustible yarn are presented in the table in the co-shell, and the feeding is carried out by a throwing device,

The drawing shows a device by which a method of producing a lightweight aggregate is carried out.

Dusting material, loose and dissimilar PO, for example, ash from ash dumps with humidity up to 20% without additional (cooking is fed to the feed hopper 1, from where the dispenser 2 to the packaging machine 3 (for example, a commercially available mineral fertilizer packaging machine) which packs ashes in portions weighing up to 5 kg in a readily combustible shell (paper, polyethylene, etc),

Packed portions of ash by elevator 4 are fed to device 5 (catapult high-speed conveyor), which throws them into the preset swelling zone of the rotary kiln. After falling onto the burning layer, the shell burns and the powdered material drains into the intergranular space, continuously covering the empty fragments.

When moving along the furnace at the same time in the transverse and longitudinal directions, the dusting material under the action of high temperature dehydrates, creating a reducing

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the medium in the intergranular space of the granules, contributing to the increase in their expansion, is scattered and distributed throughout the entire volume of the calcined granular material. In this case, an excessive amount of dusting material is formed in its intergranular space, which, when it reaches the expansion zone, allows honest dusting of the calcined material increasing in volume.

Specific examples of the implementation of the method and indicators properties zapol20

25

thirty

35

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supplied with a known method

The proposed method, in comparison with the known, provides a reduction in the bulk density of the aggregate, a reduction in the dustiness, which is achieved by a more rational use of the dusting powder, with the possibility of adjusting the powder feed site depending on the position of the expansion zone in the rotary kiln. The use of a dusting material with high humidity (up to 20%) expands the technological possibilities of the method

As refractory material, various refractory powders or their mixtures are used: thermal power plant ash, kaolin, refractory clay, spent IM-2201 catalyst, etc.

Claims (1)

Invention Formula The method of producing a lightweight filler, the incineration of the pellets and the intermittent feeding of dusting powder into the swelling zone of a rotary kiln, which is different from the fact that, in order to reduce the bulk density of the aggregate and the flow of the powdering powder, the latter with a humidity of 1-20% is placed in the combustible shell, and its supply is carried out by a throwing device. Humidity of dusting material,% Type of filing powdered powder in the furnace sintering zone in a combustible shell with a throwing device in bulk (+ yes, no) Filler properties: bulk density, kg by fraction m, mm ten 20 0.5 u ////////////// Editor M.Tovtin Compiled by V. Obraztsov Tehred L. Serdyukova Korrektor M. Samborska Order 1116/24 Circulation 588 Subscription BHfflfflH USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab ,, d, 4/5 Production and printing company, Uzhgorod, Projecto st., 4