SU1030339A1 - Method and apparatus for producing expanded clay semiproduct - Google Patents

Abstract

1. A method of manufacturing expanded clay semi-finished product from medium weakly crumbling clay raw materials, including mixing the raw material with water and additives, subsequent drying and granulation in a drum, characterized in that, in order to reduce energy costs, mixing is carried out at a moisture-clay raw material equal to 3040 % .. (L S

Description

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2. An apparatus for manufacturing a semi-finished ramite semi-finished product containing a clay raw material receiving device, a mixing drum, a drying drum and a gazo-discharging chamber, characterized in that in order to reduce energy costs, the mixing drum is made with a narrowed discharge end, a sealed end wall

loading and unloading hatches and is equipped with radial grids, while it is installed on the same axis with the drying drum, and its unloading -.

The lower end is inserted with a gap into the loading end of the drying drum, the gas exhaust chamber being located at the junction of the drying and mixing drums.

3. Installation according to claim 2, characterized in that the clay raw material receiving device is designed as a plunger feeder mounted on the same axis as the drum, while a movable labyrinth seal is placed at the point of entry of the latter into the mixing wall of the drum.

The invention relates to the production of building materials, namely the manufacture of kech of an Azite semi-fabricate kata from clay slime of overmoistened deposits. When using supermoistened clay raw materials, a plastic method for the manufacture of expanded clay semi-finished product with a preliminary drying of clay is known. However, the known method is technologically difficult and energy efficient. In addition, according to this method: It achieves uniformity of the mixture and complete destruction of the natural structure of the clay raw material . The closest to the invention of the technical essence is the spine | Nye method, according to which the intensive mixing of clay with water ensures the destruction of its natural structure and the creation of a homogeneous mixture with additives. Drying, granulation and swelling is carried out in a rotary. The disadvantage of this method is the increased energy consumption of the process, caused by the need to remove a large amount of water from the clay during heat treatment. Closest to the invention to the technical essence is the technological line for the manufacture of expanded clay gravel slip method comprising a device for receiving clay raw material (bunker), a mixing device (mud bale) rotary kiln and a venting chamber located at the charging end of the furnace. A disadvantage of the known process line is the mixing and transporting equipment operating only on sufficiently flowing pulp, which requires an increase in its moisture content. The purpose of the invention is to reduce the energy consumption in the manufacture of kerzite semi-finished product from overmoistened clay raw materials. This goal is achieved by the fact that according to the method of making a ceramics semi-finished product from a medium-low volume of clay raw material, which includes mixing the raw material with water and additives, subsequent drying and granulation in a drum, mixing is carried out at. The clay content of the raw material is 30-.40%. In addition, in the plant for the manufacture of expanded clay semi-fabricated; that containing the clay raw material receiving device, mixing drum, drying drum and exhaust chamber, the mixing drum is made with a narrowed discharge end with a sealed end wall on the loading side and discharge doors and is equipped with radial grids , while it is installed on the same axis with the drying drum, and its unloading end is inserted with a gap into the loading end of the drying drum, and the gas outlet chamber is located on the LIKE drying drums and stirring .. In addition, suitable receiving device clay feedstock; Perform in the form of a plunger feeder installed on the same axis as the drum, while a movable labyrinth seal is placed at the point of entry of the latter into the mixing wall of the drum. The drawing shows a plant for the manufacture of expanded clay semi-finished product. The installation comprises a grab 1 for feeding clay into the hopper 2 of the receiving device 3, made in the form of a plunger feeder. Through the movable labyrinth seal 4 in the loading wall, the feeder is connected to the mixing drum 5, which is equipped with movable working bodies 6, for example, free-hanging chains, radial grids to delay large inclusions, discharge hatches 8 for their periodic removal from the drum and has narrowed discharge end 9. The plunger feeder, the mixing drum 5 and the drying drum 10 are mounted in one axis successively, one after the other, with the narrowed end of the mixing drum entering with a gap in the boot end of the drying drum. A gas exhaust chamber 11 is installed at the junction of the drums. Conveyor 12 serves to feed inclusions from the hoppers 1.3 and spillages from the bunker of the gas discharge chamber to the clay depository. The conveyor 14 is intended to supply the dried granulated mass for heat treatment. The method is carried out as follows. The overwetted clay is grabbed into the bunker 2 of the plunger feeder 3, from where it enters the mixing drum 5. At the same time, the additive and water in the quantity necessary to bring the clay to a pasty form is expanded. In the mixing drum, free-hanging chains and large inclusions (stones L retaining at the radial grids 7, mix the clay with the additive and water, which, by mechanical action, significantly activates its dispersing effect on the clay structure. As the mixing moves into the drum unprocessed clay, the cooked paste is forced out through the radial grids and enters the drying drum 10. Here it is dried, and lumps of various sizes are formed, which are conveyed to The cutting chamber 14 is directly in the furnace as a ready-made semi-finished product, and granules can be molded on the appropriate equipment. The movable labyrinth seal 4 allows hot gases to escape from the drying drum through the flue chamber 11. Stones through the discharge ports 8 are unloaded into the hoppers 13 and transported conveyor 12 in an alumina storage facility. The invention makes it possible to more efficiently use clay raw materials of overmoistened deposits, i.e. in cases where the quarry is natural) moisture means: $ (only exceeds the optimum molding moisture. Compared to the plastic method, the new technology greatly simplifies the technical line, since the need for tpaHcnopTHpyraiKHX and mixing units disappears. By It is possible to use rotary kiln exhaust gases for drying pastes in the drum. Total energy consumption is reduced by 15-20% with the use of new technology, thus improving the quality of the finished product, since The proposed technology provides a more subtle decomposition of the structure of the raw material and a more homogeneous mixture with the added additives. In addition, the invention saves the fuel that would be required for the evaporation of water, which is required in a large amount of rib-type technology.

Claims (3)

1. A method of manufacturing expanded clay semi-finished product from medium and slightly intumescent clay raw materials, comprising mixing the raw material with water and additives, subsequent drying and granulation in the drum - characterized in that in order to reduce energy consumption, wet, not that, mixing is carried out with clay raw materials equal to 40% . · • \ SD CZ with a co with co © 2. Installation for the manufacture of ramsitic semifinished product containing a clay raw material receiving device, a mixing drum, a drying drum and a gas discharge chamber, characterized in that, in order to reduce energy consumption, the mixing drum is made with a narrowed unloading end, a sealed end wall on the loading side and unloading hatches and equipped with radial gratings, while it is mounted on the same axis as the drying drum, and its unloading. the end end is inserted with a gap into the loading end of the drying drum, and the gas outlet chamber is located at the junction of the drying and mixing drums. 3. Installation according to claim 2, characterized in that the device for receiving clay raw materials is made in the form of a plunger feeder mounted on the same axis as the mixing drum, while a movable labyrinth seal is placed at the place where the latter is introduced into the loading wall of the mixing drum.