SU1318565A1 - Raw mixture for granulated foam glass - Google Patents

Abstract

The invention relates to the manufacture of artificial porous aggregates for lightweight concrete and allows the range of calcination temperatures to be expanded. The mixture includes, wt.%: Volcanic ash 5-42, caustic soda 8-13 and volcanic ash mining waste 50-85%, which contain volcanic glass, feldspar, quartz, and other minerals, some of the minerals are in the form of clay. The firing temperature range is 40-75 0. The bulk density is 350-400 kg / m, compressive strength 1.4-2 Sha, water absorption 5-8%. 2 .table g (L

Description

The invention relates to the manufacture of artificial spud aggregates for lightweight concrete and can be used in the building materials industry.

The purpose of the invention is the expansion of the firing temperature interval.

Waste from volcanic ash has the following mineral composition, wt.%:

Volcanic

glass50-70

Feldspar20-30

Kvarts4-8

Limonite 3-5

Other mines. rales 6-7

A part of the minerals is represented in the form of clay, which, in its function as a binder component of the raw mix, ensures the strength of the raw granules. The presence of feldspar and quartz in the rock has a favorable effect on the expansion of the working temperature range during calcination.

Volcanic glass - the main component of volcanic ash - isotropic water is still transparent, fragments of grains are angular, often acute-angled. Refractive index 1.498, Chemical composition, wt.%: SiO 68.9- 72.2; TiO, j 0.1-02; A1, 0, 13.1-13.8; 1.2-2.7; CaO 0.8-1.7; MgO 0.1-1.2; 3.9-4.2; 3.6-4.1; ppp, 3.6-4.4.

For the manufacture of granulated foam glass, volcanic ash mining waste is dried and dispersed into fractions. The raw mix is prepared from a 0-5 mm fraction material by mixing it with volcanic ash and caustic soda solution. Granules are formed from the obtained raw mixture in a plate granulator, dried and burned in a rotary kiln at 980-1150 ° C. The compositions (1-3) and the known raw mixture (5 and 6) are given in Table I.

Raw pellets are made from raw material mixtures of these formulations in a plate granulator, which, after drying, are calcined in a rotary kiln at optimum operating temperatures for each formulation.

The firing temperature, physico-technical characteristics of the raw granules and the obtained granulated foam glass are given in table. 2,

The production technology of granulated foam glass from the proposed raw material mixture does not change as compared to that used for the known blend. The use of volcanic ash mining waste as a raw material reduces the cost of the mixture by 40% and expands the base of production of granulated foam glass.

Claims (1)

Invention Formula The mixture for granulated foam glass, including volcanic ash and caustic soda, characterized in that, in order to expand the range of firing temperatures, it also contains waste volcanic ash in the following ratio of components, wt.%: Volcanic ash5-42 Caustic soda 8-13 Volcanic ash mining waste 50-85, T a b l and c a 1 Editor N.Rogulich Compiled by, Samokhina Tehred M. Khodanych Proof-reader I. Erdeyi Order 2475/20 Circulation 427 Subscription VNIISH State Committee of the USSR for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 Table