SU1041533A1 - Raw mix for preparing light-weight aggregate - Google Patents

Abstract

RAW MIXTURE FOR THE MANUFACTURE OF EASY FILLER, including slag of thermal power plants and an additive, characterized in that, in order to reduce the bulk density of the lightweight aggregate, it contains as an additive a residue of chemical cleaning of cTO4kbix water from a cardboard-paper production with an aggregate. %: Slag teploelektro. stations85-94 Sludge chemical treatment of wastewater paperboard production 6-15 (fi

Description

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The invention relates to the building materials industry and can be used in the production of lightweight aggregates for concrete. The known raw mix for the production of a porous aggregate, consisting of clay and slag additive TPP 1. The closest to the technical essence and the achieved effect. is a mixture of raw materials 2, which includes the following components, wt.%: Slag TPP. 60-90 Montmorillonite or Illite Clay 40-40 A disadvantage of known raw meal mixtures is an increased aggregate density. The purpose of the invention is to reduce the saturation density of the lightweight aggregate. The goal is achieved by the fact that the raw material mixture for the manufacture of lightweight aggregate, including shLak of thermal power plants and an additive, contains a sludge of chemical wastewater treatment of cardboard and paper production as an additive in the following ratio of components, wt.%: Slag of thermal power plants85-94 Sludge chemical wastewater treatment of cardboard and paper production-. . 6-15 The precipitate is a product of chemical treatment (purification) of sewage using hydrolysable aluminum salts and flocculants (flocculants). In chemical treatment of wastewater, sulphate, chloride, aluminate are commonly used as aluminum salts (other compounds and their mixtures can be used), polyacrylamide can be used as flocculant (other high molecular weight compounds can also be used). and mixtures thereof, for example, quarters, ammonium bases, etc.). As the main components, sediments contain the products of hydrolysis of aluminum salts — hydroxide and basic salts, particles of kaolin, chalk, titanium dioxide and other fillers, organic substances of cellulose, hemicellulose, lignic character, resinous and fatty acids, carbon black inks, paints, macromolecular phpocul nty et al. The sediment of chemical wastewater treatment of cardboard and paper production has the following chemical composition, wt.%: StO 39-51.8 Fej, 0.0.5-1.1. JPTiSc 0.4-1.1 MgO + CaO1,4-5,0 50,30,6-1,3 Rj.O0,4-1,0 AT202Remaining Swelling of the granules on the basis of the proposed raw mix when they are treated with thermal shock occurs due to the gases released during the transition of FejO-j to -FeO, as well as due to the presence of SOg in the sediment, which constitute slag. The use of chemical treatment sludge reduces the bulk density due to dehydration of A1 (0-H), since the moisture released during the roasting period favors the granules. In addition, the use of sludge chemical treatment of wastewater of paper and cardboard production as a binder gives the necessary plasticity of the raw material mixture during granulation, technological strength of raw granules during their transportation through the process, which ultimately increases the percentage of the output of a standard lightweight aggregate. Example 1. To obtain a lightweight aggregate, slag TPPs of the following chemical composition are used, wt%: Si0245-60 Fe2033-12. Up to 1 Up to 6 Up to 0.6 Up to 4 The slag and sediment are crushed, then the fraction passing through the sieve with a hole size of 0.63 mm is used, the components are mixed in the ratio of 85-94% slag and 6-15% of sediment, granulated with water to reach a molding moisture content of 17-18%, treated in an oven according to the method of thermal shock at 1300-1350 ° C and cooled. The compositions of syaric syesy are given in table. 1. Table Slag TPP Sediment. Chemical wastewater treatment .kartonoob, bulk production

example 2. Protseg; .c lead t. as indicated in example 1, where slag and montmorillonite clay are used as components with a ratio of components wt.%: slag TPP 60-90; montmorillonite clay 10-40.

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As physical and mechanical characteristics, the strength of raw granules and the bulk density of the baked calcine are determined.

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Table

The number of drops of raw granules with height

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11,500 mm

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As follows from the data in Table 2, the proposed aggregate has a lower bulk density and an increased strength of the raw granules.

Claims (1)

(53) RAW MATERIAL MIXTURE FOR MAKING A LIGHT FILLER, comprising slag from thermal power plants and an additive, characterized in that, in order to reduce the bulk density of a lightweight aggregate, it contains an additive for the chemical treatment of waste water from paperboard in the following ratio of components , May.%: Slag of cogeneration plants Sludge for chemical wastewater treatment of paperboard production