SU1011597A1 - Raw mix for preparing light-weight aggregate - Google Patents

Abstract

RAW MIXTURE FOR PREPARING EASY FILLER, including ash and binder additive, characterized in that, in order to reduce the bulk density of the aggregate, as a binding additive it contains waste acidic mine water treatment in the following ratio of components,% by mass: Ash . 70-95 Waste treatment: acid mine waters 5-30

Description

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The invention relates to the building materials industry and can be used to produce lightweight aggregates, for example, expanded clay and agloparite. The known raw material mixture for producing lightweight filler based on TPP ash and a binding additive — sulphite-alcohol stillage solution. The closest technical solution to the proposed technical essence and the achieved result is a raw mix for obtaining lightweight filler, including the following components, wt.%: Ash. 70-95 Clay raw materials 5-30 C23. A disadvantage of the known raw materials is the high bulk mass of the coated granules. The aim of the invention is to reduce the bulk density of the aggregate. The goal is achieved by the fact that the raw material mixture for obtaining a lightweight aggregate, including ash and a binding additive, as a binding additive contains cleaning waste of acidic mine water at the following ratio of components, wt.%: Ash 70-95 Cleaning waste from acidic mine water 5-30 Acid mine water cleaning waste is a finely dispersed plastic mixture containing the following components, wt.% Pe (OH) s A1 (OH) s Remaining. Trace elements The said wastes are obtained by neutralization with lime or lime lime acid mine water, containing dissolved iron and aluminum salts. The technology for the preparation of aggregates from the feed mixture described is generally accepted for the manufacture of, for example, expanded clay or agloporite. Example. Acid mine sludge cleaning waste and ash from burning coal are taken and the composition is prepared: at the following ratios of components, wt.%: (In terms of dry components), Eola 95 80 70, Waste of cleaning sour mine water 5 20 30 Then to water is added to these formulations to form molding moisture and the granules are formed with a diameter of 1.21.7 cm. After that, the granules are dried at room temperature and then calcined in an electric laboratory furnace at the optimum mode for each composition. Heat treatment includes preheating of the pellets at 600-700 ° C for 1-3 minutes and then firing at temperatures from 1050 to 1150 ° C. The oily granules are cooled in air, then the bulk density, strength, and other parameters are determined. . EXAMPLE 2 Raw materials, the mixture is analogous to example 1. As a binding additive, loam is introduced into the mixture with a swelling ratio of 4.5 in an amount of 5.20, 30 wt.% (Calculated on the dry matter of the mixture ). After mixing the clay with the ashes and water, a plastic mass is obtained, from which, similar to Example 1, the granules are prepared, they are dried, calcined, cooled in air and their bulk density, strength and other parameters are determined. The test results of the calcined pellets made according to examples 1 and 2 are presented in table. 1. The test results of the proposed and prototype-known raw materials, mixtures are presented in Tarl. 2, The test results show that the bulk weight of the ash filler of the proposed charge is reduced compared with the known charge from 0.950-1.134 to 0.830-0.868 g / cm while increasing the strength of the raw granules. Table 1

Table Y

Bulk weight

Claims (1)

RAW MATERIAL MIXTURE FOR PRODUCING AN EASY FILLER, comprising ash and a binder additive, characterized in that, in order to reduce the bulk density of the filler, it contains waste acidic mine water treatment waste as a binder additive in the following ratio, wt.%: Ash . 70-95 Cleaning waste acid mine water 5-30