SU1244123A1 - Method of manufacturing decorative aggregate and arrangement for manufacturing same - Google Patents

Abstract

1. A method of making a decorative filler by applying silicate paint on the surfaces of grains of inorganic material and its subsequent curing, characterized in that, in order to simplify the process, reduce costs, expand the range and improve the quality of the finished product, the coloring of the grains is carried out by intensive mixing with them silicate paint for 15-20 seconds, and curing is carried out in two stages, first in a drum rotating at a speed of 30-50 rpm in a stream of air with temperature swarm 80-90 C for 2-3 minutes, then at 150-180 C in a rotating with a speed of 3-4 revolutions / min drummed for 30 minutes. C (L 4: tN3 oo

Description

2. Installation for the manufacture of decorative filler, containing a device for dyeing grains of inorganic material and a drum dryer, characterized in that, in order to simplify the process, cost reduction, expansion. The range and improvement of the quality of the finished product is a device for dyeing grains made in the form of a spiral vortex mixer.

The aim of the invention is to simplify the process, reduce costs, expand the range and improve the quality of the finished product.

The drawing shows a plant for making a decorative filler.

The installation comprises a hopper 1 of the initial aggregates, a ball mill 2 for the preparation of a coloring composition, a feed tank 3 of a coloring composition. The technical means of covering the surface of the aggregate grains with a thin colored layer is the mixer 4 of the spiral-vortex type. An intermediate hopper 5 and a belt feeder 6 are installed in the mixer. An exhaust fan 7 is installed at the inlet end of the drying drum 8, and infrared emitters 10 are located along the axis of the thermo-curing drum 10. At the output end of the thermo-cure drum there is a finished product hopper 11. The diameters and lengths of the drying drum and the thermoset drum are in a ratio of 1: 2-1:: 2.5 and 1: 2.5 - 1: 3, respectively.

At smaller values of these ratios, the continuity of the technological process is disrupted due to

of the second type, and the drum dryer - in v1-u. of two successively arranged drums with a ratio of diameters of 1: 2 - 1: 2.5 and a ratio of lengths of 1: 2.5 - 1: 3, while the first drum is equipped with a fan with air-exciting throat, and the second drum is equipped with infrared radiators located inside it along the axis.

low productivity of the drying drum 8, and at large - uneconomical process is observed due to incomplete loading of the drum 9

The method is carried out as follows.

First, a coloring composition is prepared separately, consisting of 25-30% by weight of thermally activated (at 600-650 ° C for 3 hours) dolomite powder with a specific surface of 250-300, 5-10% by weight of inorganic pigment, 5 wt.% talk and 50-60 wt.% sodium or potassium water glass with a ratio of SiOj, 5-3 and a density of 1.3 g / cm. All paint components are mixed in a ball mill 2 for 30 minutes.

Then, portions of dry and clean aggregates from bunker 1 are poured into mixer 4 of type CER (spiral-vortex mixer), ensuring their intensive mixing.

At the same time, silicate paint is poured into the mixer. Paint consumption mainly depends on the size of the grains to be painted and is given in Table. one.

In the process of mixing, due to friction, the grains are coated with a thin uniform layer of paint for 15–20 s., P1) and its minimum consumption. The painted grains enter the intermediate hopper 5, from where with the help of a belt feeder 6 they are fed into a spinner (ice drum 8, the rotation speed of which is 3031

50 rpm with a diameter of 0.4-0.8 m and a length of 3-4 m. In this drum, the grains acquire a rather intensive movement, which prevents the sticking of individual grains into clumps. In addition, the drum is provided with a fan 7, which creates a stream of hot air inside the drum. The air is taken from the second heat-treating drum and can be returned to this drum again. In 2-3 minutes the grain passes through the dryer, drum and enters the slowly rotating thermoset drum 9, whose rotational speed is 3-4 rpm, diameter 0.8-1.6 m, length 6-8 m. This rotation only contributes mixing of the material and uniform heating of its entire volume, as well as transportation of grains along the drum axis, which does not cause noticeable damage to the color layer from friction. Mounted inside the drum IR emitters 10 heat the mass of aggregates to 150-180 ° C. The residence time of the grains in the heating zone is controlled by varying the angle of the drum and is approximately 30 minutes. From the drum heat treatment of grain is fed into the bunker 11 of the finished product.

The values of the main technological parameters and the properties of the output product are given in table. 2

The proposed method allows to simplify the technological process through the use of a new method of coloring the grains, in which

85

75

, g 5 20 5

0

five

23

only one technical tool is used. The method is simple, reliable and cost effective. Due to the thin layer of color on the surface of the grains, the process of their drying is greatly facilitated and the pollution of the process equipment is reduced by paint. The process of preparing the coloring composition is also greatly simplified. The appropriate layout of the process equipment eliminates a number of transport operations, since the substance to be manufactured is mainly driven by gravity. The quality of the decorative aggregates obtained is increased, since a thin, uniform decorative film that is produced has several advantages (for example, improved weather resistance, adhesion strength) over a thick and uneven film. A new method of curing avoids the sticking of the grains into clumps and damage to the color film from friction. The cost of the fillers produced is reduced by the use of a cheap dye composition and a reduction in its consumption. Dp staining uses cheap raw aggregates (for example, crushing waste from dolomite rock). The energy costs are reduced due to a significant reduction in the painting time and the use of hot air from the heat treatment drum for the primary drying. The assortment of manufactured material is expanded.

Table 1

55

45

40

35

Claims (2)

1. A method of manufacturing a decorative aggregate by applying silica paint to the inorganic material on the grain surface and subsequently curing it, characterized in that, in order to simplify the process, reduce costs, expand the range and improve the quality of the finished product, the grains are colored by intensively mixing them with silicate paint for 15-20 s, and curing is carried out in two stages, first in a drum rotating at a speed of 30-50 rpm in a stream of air with a temperature of 80 -90 C for 2-3 minutes, then at 150-180 C in a drum rotating at a speed of 3-4 rpm for SU „1244123 2. Installation for the manufacture of decorative aggregate, containing a device for coloring grains of inorganic material and a drum dryer, characterized in that in order to simplify the process, reduce costs and expand. the assortment and improve the quality of the finished product, the device for coloring grains is made in the form of a spiral-vortex-type mixer, and the drum dryer in the form of two successively arranged drums with a diameter ratio of · 1: 2 - 1: 2.5 and a length ratio of 1: 2 , 5 - 1: 3, while the first drum is equipped with a fan with an air-absorbing neck, and the second drum is equipped with infrared emitters located inside it along the axis.