SU1289845A1 - Raw mixture for producing porous aggregate - Google Patents

Abstract

The invention relates to the production of building materials and can be used to make a porous filler during firing in a rotary kiln. To increase the strength of the aggregate, increase the yield of granules with a size of 5–20 mm while maintaining the swelling of the raw material, the sfie mixture includes, in wt.%: Ash-slag mixture of thermal power plants 57-87J quartz sand 3-10; iron-containing component 3-10, limestone flour 1-3, clay 6-20. 1 tab. with o (L

Description

The invention relates to the production of building materials and can be used to make a porous filler during firing in a rotary kiln.

The purpose of the invention is to increase the strength of the aggregate, to increase the yield of granules of 5-20 mm in size while maintaining the swelling of the raw material.

Raw mix for the manufacture of porous filler includes, by weight. ash-slag mixture of thermal power plants 58-87J quartz sand 3-10, iron-containing component 3-10, additional

577387 65

1063 30

1063 15

321

20136.

300 320 320 300

Compressive strength, MPa

The content of granules fraction 5-20 mm (mixture),% 91 89 88 28

To obtain raw granules with maximum strength and transport ability, clay of various plasticities is introduced into the mixture as a binder and plasticizer.

Ca (CaO) has a large effect on the swelling of the mixture; therefore, the introduction of limestone flour, which dissociates when heated, to the mixture,

It contains 1-3% by weight of lime flour and 6-20% by weight of clay.

The ash-and-slag mixture contains 45–80 wt.% Of the slag of thermal power plants and 5-30 wt.% Of unburned fuel residue from the amount of fly ash contained in the ash-slag mixture, quartz sand according to GOST 7031-75, limestone flour according to GOST 14050-78, clay GOST; 5499-79. .

Examples of the composition of the mixture and properties of aggregates based on the known and proposed mixtures are presented in the table.

3.18 3.32 3.55 1.0

It promotes the expansion of the granules. In addition, the limestone flour interferes with the sintering of the granules during calcination and ensures the creation of an external reinforced shell of the granule during the interaction

with other components of the mixture in the kiln.

The presence of an iron-containing additive in the mixture (pyrite cinders, blast furnace dust, scale) provides

312898454

a decrease in the degree of grinding (dissolving slag mixture of heat and electric power) of raw materials, components, silica sand, iron content of softening temperature and, consequently, component that differs responsibly, temperature of swelling, with the aim of increasing

No, increasing the strength of the granules with the strength of the aggregate, increasing the storage of the swelling of the raw material. The granules are 5–20 mm in size when using the proposed blending of the swelling of the raw material;

provides with the same raft - additionally contains limestone

to increase the strength of the filled flour and clay at the following ratios of 3-3.5 times and increase the output of the components, wt.%: yes the burned granules of the fraction 5-20 mm Zoloshlakov mixture up to 80-91% against 28% in the case of - thermal power plants 57-87 of the known mixture. Quartz sand 3-10

Claims (1)

ЖВJrIe 3 Containing the Formula of the Invention f5 component 3-10 Raw mix for making lime flour 1-3, porous filler, including Clay6-20