SU881064A1 - Method of producing claydite - Google Patents

Description

(54) METHOD OF OBTAINING KERAMZIT

The invention relates to the building materials industry, in particular to the production of expanded clay. A known method for obtaining expanded clay is by grinding raw materials, molding granules and processing raw granules with fine dusting material with ferromagnetic bodies in a fluidized bed with alternating and constant electromagnetic fields. In this case, the dusting material pushes into the walls of the granules, simplifies it, and during firing provides swelling and a decrease in the bulk density 1. The disadvantage of this method is the obligatory use of the dusting material and the high bulk density of the resulting claydite. Without a powdered material, there is no effect of reducing the bulk density, since the mechanical effect of ferromagnetic bodies on the raw granules results in a thickened sintering short core after p6) laira. The effect of the magnetic field created by ferromagnetic bodies is reduced, because when the raw granules are processed, the impact of ferromagnetic bodies occurs through the raw granules (5-16 mm in diameter), thereby increasing the gap between ferromagnetic bodies. With increasing gap between ferromagnetic bodies, the intensity decreases inversely with the square of the distance between them, i.e., the constant magnetic field is dissipated, and as a result, the particles of the raw material do not change and the swelling bovspuchivayuschegos feedstock is not increased. The purpose of the invention is to reduce the bulk density of expanded clay. This goal is achieved by the fact that according to the method of producing kraamzite, which includes grinding the raw materials, forming granules and processing the alternating and constant electromagnetic field in the fluidized bed of ferromagnetic bodies, processing the alternating and constant electromagnetic field turn the crushed raw material before molding. At the same time, the raw materials are subjected to mechanical action of the moving ferromagnetic bodies and the physical - two UNODE magnetic fields (variable Horo, created, for example, by solenoids, and permanent, created by ferromagnetic bodies), B. Impact points of ferromagnetic bodies pass through a particle of raw material through a constant magnetic field of large magnitude, in the order of 2000-5000 Oe (the magnitude of this field depends on the properties of ferromagnetic bodies), which causes a weakening of intercrystalline bonds, an increase in the amount of free energy ,. the reorientation of the dipoles of the original substances, which leads to a change in the rheological properties of the weakly conducting one. (Raw

Example. The low-pulverized raw materials (clay, ash, slags) pre-crushed in a ball mill are passed through a boiling layer of ferromagitic bodies, which are driven by the action of an alternating electromagnetic field generated by a variable-field source. The processing time of the raw material is 5, 10, and 30 minutes (depending on the physicomechanical properties of the raw material). The fluidized bed is created in a special

varnish (Kazan22 22 22 48 oh CHP)

22 48

Lina (Omsk

22 22 Eatings)

48

22 22 48

Ash (Erma22 48

K08SKAYA GRES)

22 22 48

capacitors when exposed to an alternating electro-magnetic field generated by solenoids. The intensity of the alternating electromagnetic field is regulated by the amperage and is 22-48 ka / m. At the same time, the raw material is affected by a constant magnetic field, which is created by ferromagnetic bodies. In experiments, ferromagnetic bodies made of various materials are used: 1 BI, 2BA1, 2BA, and CSA. Due to this, the intensity of the constant magnetic field in. the impact point varies for different batches of raw materials and is 150, 160, 200, 400 ka / m. Then granules with a diameter of 10 mm and a height of 10 mm are molded from the processed raw material by a plastic method (with the addition of water). The granules are dried in a drying cabinet to a dry air condition and calcined in a shaft furnace for 7 minutes at the optimum expansion temperature.

Specific examples of the method are presented in the table.

0.70 0.49 0.48 0.40

0.86 1.01

0.81

I50 0.53 1150

0.47

1150

Known method

1.69

1150

one

ISO 088 1300 150 0.97 1300

S 400

1.32

16010

1300 1.21

40010 1300

Izvelky method

.1,79 1501

1300 1.85

1501 1350 1.96

40010 1350

From the data obtained, it can be seen that as a result of treating the weakly crumbling raw material (slag, ash, clay) with a fluidized bed of ferromagnetic bodies in an alternating electromagnetic field, the volume mass of the resulting claydite squeezes by 18-40%, while processing by a known method increases the volumetric mass of samples.

The economic effect of the processing of the raw material by the fluidized bed of ferromagnetic bodies is determined by the formula

E A (C, - Cr) - 0.12 Cdop, where A is the annual capacity, thousand m; Ci and Cj - the cost of claydite before and after applying the treatment, rubles / m; This is an additional capital investment.

on the implementation of the event, thousand rubles .; 0.12 - normal efficiency ratio.

The economic effect from the introduction is E 123.0 (7.05-6.40) - 0.12 10.0 123 0.65 - 1.2 78.75 thousand rubles.

Claims (1)

Invention Formula A method for producing expanded clay, which includes crushing the raw material, molding granules and treating with alternating and constant electrofluous fields in a fluidized bed of ferromagnetic bodies, characterized in that, in order to reduce the bulk weight of expanded clay, treating with alternating and constant electromagnetic fields in a fluidized bed of ferromagnetic bodies subjected to crushed raw materials before forming granules.  Sources of information taken into account in the examination 1. USSR author's certificate IP 624903, cl. C 04 B 31/02, 1977 (prototype).