RU1782957C - Process for producing light porous filler - Google Patents

Abstract

SUMMARY OF THE INVENTION: in a method for manufacturing a lightweight porous aggregate comprising washing and drying glass cullet, washing to a specific surface of 4,500-5,000 cm / g, mixing with a blowing agent, granulating, drying granules, foaming and annealing at a rate of 7-10 ° C / min The granules are dried by the gases leaving the foaming furnace, the expansion is carried out in the dusting medium from the group of: ash from thermal power plants, clay, silica sand, cement dust, talc, calcified flour, pyrite cinders, fireclay dust, and annealing by a rotating unheated drum. Aggregate characteristics: bulk density 120-160 kg / cm -, water absorption 0.5-1.5%, adhesion to cement mortar (1.1-1.5) j1 0 Pa. 1 tab .. .;. L. - -1.; . -:, .l- -.- ..: -

Description

 The invention relates to the manufacture of artificial porous aggregates, in particular to methods for the manufacture of granular foam glass, and may find application in the building materials industry.

A known method of manufacturing a lightweight aggregate in which an initial mixture of glass microscopes, sediments of abrasive wastes and an alkaline solution from caprolactam production wastes is treated in an ITL. granulate, dry at 100-150 ° C, swell at 775-800 ° C and cool at a speed of 60-80 ° C / h.

Closest to the proposed is a method of manufacturing a light porous aggregate, including washing and drying glass cullet, grinding glass cullet to a specific surface of 4500-5000 cm2 / g, mixing with a pore former in a ratio of 100: 3, granulating, drying granules, curing /, expansion and annealing.

The purpose of the invention is to reduce the energy intensity of the process and the water absorption of the aggregate, as well as increasing adhesion to the cement mortar.

.Really p. The cullet of the picture tubes is crushed in the Crusher and fed and fed to the washing unit. After washing, the cullet is dried with exhaust gases from the pellet kiln. Then a dry fight is fed to a ball mill together with a blowing agent with a cullet: blowing agent ratio of 100: 3 and grinding to a specific surface of 4500-5000 cm2 / h. Next, the crushed mixture enters the dish-shaped granulator, where the formation and dusting of granules of size

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5-10 mm. The raw granules are conveyed by a conveyor to a raw granule drying unit, in which the waste gas from the kiln is a heat carrier. In the drying unit, the heating of the granules takes place up to jeMnerature 220–700 ° С (temperature of gases leaving the kiln is 880 ° С). From the drying unit, the granules are fed to a rotary kiln, where they are heat-treated and swelled in a dusting medium at a temperature of 780-860 ° C for 7-10 minutes. A rotary unheated drum is fed to the annealing plant from the pellet kiln, where, due to its own heat, it is heat-treated and cooled at a rate of 7-10 ° C / min. The removal of exhaust gases through the drying of raw materials ensures constant pressure and temperature in the heat treatment unit and the stability of high quality products.

The product properties of the resulting aggregate are presented in the table.

In this case, the swelling of the granules is carried out in a dusting medium, from the group: ash of thermal power plants, clay, silica sand, cement dust,

talc, calcareous flour, pyrite cinder, fireclay dust.

Claims (1)

The aggregate has a bulk density of 120-160 kg / m; the coefficient of variation of the bulk density is 3-7%; water absorption is 0.5-1.5%; aggregate adhesion to cement mortar (1.1-1.5) x10 Pa; energy intensity process 397-411.5 KJ / kg. SUMMARY OF THE INVENTION A method for manufacturing a lightweight porous aggregate, including washing and drying glass cullet, grinding to a specific surface of 4500-5000 cm / g, mixing with a blowing agent, granulating, drying granules, foaming and annealing at a rate of 7-10 ° C / min, different in order to reduce the energy intensity of the process and the water absorption of the aggregate, as well as to increase adhesion to the cement mortar, the granules are dried by the gases leaving the foaming furnace, and the swelling is carried out in the dusting medium from the group of ashes of thermal power plants. clay, quartz wood, cement dust, talc, lime powder, pyrite cinder, chamotte dust, and annealing in a rotary unheated kiln drum. The result of determining product quality t .j№jg “Si E 4 L .. l H4B. & ,, Continued f a 6 l I c s