SU1313823A1 - Method for producing porous aggregate - Google Patents

Abstract

The invention relates to the industry of building materials, in particular to the production of artificial aggregates, mainly claydite sand, and can be used in the production of wall materials produced by the method of semi-dry pressing. The purpose of the invention is to accelerate the granulation process and reduce energy consumption. The method of obtaining a porous aggregate involves preparing a slurry mass from the raw mix, granulating it with stirring with simultaneous vibration for 2–3 min with a frequency of 16-20 Hz and an amplitude of 0.5–1.5 mm. after 0.5–1 min of vibration, a surfactant is introduced in an amount of 0.05– 0.3 wt.% and subsequent heat treatment. 1 tab. with (L

Description

The invention of OTHOCPITCH to the production of building materials and can be used in the manufacture of expanded clay from clay raw materials subjected to granulation before firing.

The goal of the acquisition is to accelerate the granulation process and reduce energy costs.

The method of obtaining a porous aggregate involves preparing a slurry mass with a moisture content of 45-65% from the raw mixture, which is granulated by combining mixing with vibration for 2-3 m with an oscillation frequency of 16-20 Hz and amplitude of 0.5-1.5 mm a surfactant in an amount of 0.05-0.3 wt.%, which is introduced into the slip after 0.5-1 minutes of vibration mixing.

Example. The plastic clay from the Voskresensk deposit with a career humidity of 27-31% is prepared for a slip mass with a moisture content of 45-65%, which is fed into a paddle mixer. At an oscillation frequency of 16-20 Hz (corresponds to the number of 960-1200 oscillations per minute) and an amplitude of 0.5-1.5 mm, the vibration effect is combined with the mixing of the slip mass and after 0.5-1 minutes, the vibratory mixing in the slip mass is introduced superficially -active substance in the amount of 0.05-0.3% by weight of the slip in the calculation of the dry substance. After 2-3 minutes of vibratory mixing, the finished granules are discharged onto the grate to separate the water released during the granulation process by vibratory mixing of the slip mass. In quality. An aqueous solution of polyacrylamide is used for the surfactant, the concentration of which is calculated depending on the required amount of input. After dewatering on the grate moisture of the granules

23-30%, which is then dried and fired in a rotary kiln.

Specific examples of the method implementation and process indicators are presented in the table in comparison with the known granulation method using the mixing method.

The proposed method ensures the production of granules from the slip mass with low humidity, which has a positive effect on the reduction of energy consumption during the drying and firing process, and the acceleration of the granulation process by vibrating exposure during mixing reduces the duration of the technological process, which is facilitated by the introduction of surfactant into the slip mass after 0.5- 1 min, vibro-mixing The proposed method can be used to obtain clay clay slurry mass of claydite with a granule size of 0.1-5 mm with a bulk density of 550-580 k g / m, compressive strength 4.5-4.8 MPa or ceramdor With grain sizes of 0.05-4 mm with a bulk density of 800-850 kg / m and compressive strength of 6.5-7 MPa.

Claims (1)

Invention Formula The method of obtaining a porous aggregate, which includes preparing a slurry mass from the raw mix, granulating it with stirring and subsequent heat treatment, is about the fact that, in order to accelerate the granulation process and reduce energy costs, slip mass with a humidity of 45-65 % granulate with simultaneous vibration for 2-3 minutes with an oscillation frequency of 16-20 Hz and an amplitude of 0.5-1.5 mm, while in the slurry after 0.5-1 minutes of vibration an 0 surfactant is injected , 05-0.3 May.7 ,. Slurry mass,% Vibration parameters during the mixing process: frequency, Hz Amplitude mm Duration, min The introduction of surfactant into the core mass through a period of time from the beginning of vibro-mixing, min The amount of surfactant, wt.% The granulation process, min The moisture content of the granules,% Energy consumption for drying 1 m raw granule (kg fuel conditions) Editor S. Lisin Compiled by V. Obraztsov Tehred A. Kravchuk Order 2177/24 Circulation 588 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, -ZH-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, Projecto st., 4 55 45 50 The formation of granules in the process of mixing the slip in the furnace 1.0 0.3 3.0 27 25 50 23.3 46 Proofreader L. Patay