SU1502514A1 - Raw stock for producing porous aggregate - Google Patents

Abstract

The invention relates to the production of artificial porous aggregates for lightweight concrete using industrial waste. In order to reduce the filler density while saving natural raw materials, the raw material mixture includes, wt%: clay 20-40 and flotation waste of apatite ores containing carbon dioxide 60-80. The resulting aggregate is characterized by a bulk density of 852-892 kg / m ³ , strength of 3.67-3.8 MPa and water absorption of 7.4-8.3%. 1 tab.

Description

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

The purpose of the invention is to reduce the filler density while saving natural raw materials.

Raw mix for the production of porous filler includes, wt.%: Clay 20-40; waste (clot of apatite ores 60-80.

In the preparation of the raw mix, flotation waste from apatite ores is used, which is a yellow-brown powder with a grain size of up to 1 mm (residue on a sieve of 0.63 mm less than 3%) and have the following chemical composition, wt.%: 74; TiO, 0.10; 2.24; Fe-iOj 2.89; FeO 0.72; MnO 0.19; MgO 13.72; CaO 24.01; 0.11; K, 0

0.70; CO, 27.30; 3.24; F 0.30; SeBia ,, 0,10; ppt 0.56, and mineralogical composition, wt.%: Carbonates (dolomite and calcium) 70; quartz 15; ; chlorite + serpentine 3; magnetite + hematite 3; apatite - about 5; feldspar 3; mica (phlogopite) up to 1; gypsum, anhydride - single grains.

Clay, which is currently used as a corrective additive in the production of mineral wool, has the following chemical composition, wt.%: SiO 58.00; TU 0.74; AlsOj 14.62; FejOj 4.00; FeO 2.21; MnO 0.06; MgO 2.86; CaO 1.96; 1.44; 3.66; 2.18; CO 1.97; . 0.15; P.P.P. 7.32.

To obtain a porous filler, the raw materials are dried, weighed in various proportions and loaded into a laboratory mill with a capacity of 7 liters in an amount of 3 kg of the mixture.

SP

about

N5

SL

3150

where it is agitated and is done at 1 sec for 10 minutes. The dispersion of the obtained powder is characterized by a residue on a sieve of 0.2 mm 8-10%. The powder is splashed with water in a water: powder ratio of 0.17; 0.20, the mass is stirred in a spherical bowl and cylinders are prepared in a laboratory screw press, which are then doused in a laboratory dish-shaped granulator, dried and burned in an electric rotary laboratory. kiln at 1160-1170 s, roasting time 25-30 min. The composition of the raw mix is presented in table. one.

Table 1

80

70

60

Properties of the obtained filler are presented in table. 2.30

I

table 2

892 875 852

3.8 3.72 3.67

10DO-1052

9,5- 9,9

Continuation of table 2

Water absorption for 1 h, wt.%

7-, 5 8.3 7.4

The proposed aggregate can be used in lightweight concrete, for which the indicator of the bulk density of the aggregate is of great importance. According to its main characteristics, the proposed aggregate meets the requirements of the current standard for artificial porous aggregates.

Claims (1)

The production of aggregate from the proposed raw material mixtures can be carried out on expanded clay aggregates by plastic method. The organization of such production will allow to utilize ore flotation waste, to provide the construction industry with aggregate for light concrete. Invention Formula Raw mix for the production of porous aggregate, including clay and ore dressing wastes, characterized in that, in order to reduce the filler density while saving natural raw materials, it contains carbon dioxide gas flotation waste as an enrichment waste, in the following ratio of components , wt.%: Clay20-40 Flotation waste apatite ores, containing carbon dioxide 60-80 Compiled by V. Obraztsov Editor I. Derbak Tehred M. Khodanych Order 5035/30 Circulation 591 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Proofreader T.Paly Subscription