SU1418316A1 - Raw mixture for producing porous aggregate - Google Patents

Abstract

The invention relates to the production of building materials and can be used to obtain expanded clay from a mixture of clay raw materials and industrial waste. To reduce the density of the filler in the raw material, the mixture includes, in wt.%: 44-74 clay raw materials, 2-3 spent gumbrin, 20-50 ceramic waste and 2-3 slurry aluminum production waste. The resulting aggregate is characterized by a bulk density of 260-350 kg / m3 and a strength of 1.25-1.80 MPa. about 2 tab.

Description

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The invention relates to the production of building materials and can be used to obtain expanded clay from a mixture of clay and industrial waste.

The purpose of the invention is to reduce the bulk density of the filler,

The mixture for the manufacture of a porous filler includes, in May,%: clay material 4A-74, spent gumbrin 2-3, waste ceramic production 20-50, ptam aluminum waste 2-3,

Ceramic production waste is used in a ground form and is a mixture of pieces of various sizes of raw clay, brick baux, dehydrated clay and others. They are represented by a mixture of the crystalline phase and depreciated clay minerals. The chemical composition of the waste used is given in table. one.

Aluminum sludge wastes are a gas cleaning product which contains, in mass, 7 °: F, 10-30; j 10-20; + 10-25; C 20-40; 2-5

The aluminum production technology determines the content of the specified amount of fluorine in the waste produced as sludge in the flotation shop during gas cleaning.

Spent gumbrin obtained by contact cleaning of oils from resins is a waste of refineries and contains 75-80% of bentonite clay, 5-10% of resins and 10-20% of mineral oils,

Example. Prepare a mixture of clay of the following chemical composition, wt.%: SiOj 56,82; , 14.22; Fe O, 6.09; CaO 4.9; MgO 3.63; + .3,8; SO, 1.53; ppt 8.2, waste taken from a common dump, additives of spent gumbrin and sludge, which is a gas cleaning waste from aluminum production.

Clay, ceramic waste, spent gumbrin and sludge waste from aluminum production are mixed, and the raw mixture is prepared, the composition of which is given in Table. 2, granulate and burn in the usual expanded clay technology.

The raw mix when disposing of ceramic production waste and sludge from aluminum production ensures a decrease in the density of expanded clay to the level of 260 - 350 kg / m,

The effect of reducing the bulk density is achieved by the combined action of gumbrin additives and carbon fluorine-containing sludge from aluminum production, which provides a reducing atmosphere during the swelling period, as well as transferring already calcined clay particles from ceramic production waste to the glass phase.

Claims (1)

Invention Formula Raw mix for the manufacture of porous aggregate, including clay raw materials and waste Gumbrin, characterized in that, in order to reduce the bulk density of the aggregate, it additionally contains waste ceramic production and sludge waste aluminum production in the following ratio of components, wt,%: Clay raw materials. 44-74 Spent gumbrin 2-3 Ceramic production waste 20-50 Slurry waste aluminum production 2-3 The chemical composition of the waste of ceramic production,% SiO ° i ° CaO MgO K ,, 0з ppt 58.6 19.5 6.4 3.4 Table 1 0.6 5.56 4.4 0.56 0.98 The type and content of components in the mixture, wt.% clayey raw material spent gumbrin ceramic waste slurry waste aluminum production Characteristic porous filler - Eramzita bulk density, kg / m strength at compression, MPa table 2 65 44 98.5 1.5 thirty thirty 50 280 270 350 540 1.40 1.28 1.80 1.85