SU1668331A1 - Raw mixture for manufacturing agloporite - Google Patents

Abstract

The invention relates to the production of building materials and can be used to make agloporite based on industrial wastes. To reduce water absorption and increase the softening rate of agloporite, the raw mix includes, in wt.%: Clay 10-20, enrichment waste of kaolin clays 75-85 and black tar - waste from the oil industry 5-10. characterized by a bulk density of 660–740 kg / m ³ , strength 1.1–2.0 MPa, water absorption 8.8–10.3%, softening coefficient K _p = 0.97– 0.99. Losses during ignition are absent. 2 tab.

Description

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The invention relates to the production of building materials and can be used to make agloporite based on industrial wastes.

The purpose of the invention is to reduce water absorption and increase the agloporite softening coefficient.

Raw material for the manufacture of agloporite includes, May. %: clay 10-20; waste kaolin clays 75-85; black tar - waste oil industry 5-10.

To prepare the mixture, clay of the following chemical composition is used, wt%: SI02 57-62; 50s 0.3-0.6; 23-27; ReaOz 0.8-2.0; CaO 0.2-0.1; MDO 0.5-1.0; NaaO 0.1-0.9; K20 1.0-1.6; ppt 10-12, as well as silicon-containing raw materials - waste from the enrichment of kaolin clay, the chemical composition of which, wt.%; SI02 77-83;

50s 2-3; AlaOa 4-8; Re202 2-6; CaO 0.3-3; MgO a-0.9; N320 0.2-1; teO 0.5-2; ppt 3-5

Silicon-containing raw material from waste has the following particle size distribution, residue on sieves%: 5mm 0.03-0.4; 2.5 mm 1.31-2.88; 1.25 mm 5.07-7.7; 0.63 mm 22.69 - 24.03; 0.315 mm 26.46-34.28; 0.14 mm 29.04- 33.91; less than 0.14 mm 5.5-9.88.

As an organic additive, insoluble black tar is used - waste oil industry (gossipol resin). This tar is treated with monoethanolamine at a ratio of 10: 1 to make it water-soluble. The resulting product is a surfactant foaming agent and is used as a 10% aqueous solution. The material composition of the organic additive is the following, in wt.%: Gossypol resin 90; monoethanolamine 10.

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In order to obtain agloporite in granules, the sintering of the agloporitic mixture is performed in a rotary kiln.

Example. The manufacture of agloporite occurs according to the following technology.

Silicon-containing raw materials without additional processing sift through a sieve with hole sizes of 1.25 mm and served in a two-shaft mixture mixer type SH-AT-71. The dispenser regulates the consumption of silicon-containing raw material and finely ground clay, which also enters the mixer. In the mixer, the mixture is stirred and moistened with an organic additive dissolved in water. From the mixer, the charge flows through a belt conveyor to a plate granulator, where it is further moistened with the help of nozzles to an optimum value and pellets are formed into granules with a diameter of 5-20 mm. From the granulator, the raw granules are fed to a belt conveyor, which supplies them to the loading unit of the rotary kiln. Calcination is performed at a temperature of 1050-1150 ° C. From the unloading end of the machine, they arrive at the screen, screening ol into fractions up to 5.5-10, 10-20 mm.

The compositions of the mixtures are given in Table 1, and the properties of the resulting agopoporite in the granules - and the table ...

Aglopopies are obtained from the raw mix, which in fractions 5-10 and JO-23 mm is characterized by a bulk density of 660-740 g / m3, strength of 1.1-2.0 MPa by absorption of 8.8-10.3% , coefficient of softening Kp Q, J7-0,99, During the testing of agloporle gravel when calcining, there is no mass loss.

Organic additive - black tar, has the properties,: AB, provides

plasticization of the raw mix, which facilitates its granulation, since the silicon-containing raw materials from the kaolin clay enrichment waste is not a plastic material due to the higher sand content, and during firing it provides low-melting eutectics on contact with the clay matter and impurities — quartz, feldspar, hydromica that promotes the formation of a liquid phase in the calcined material and the development of phase formations, in particular mullites, which are a kind of micro-armature, reinforcing glass in agloporite and its strength in compression and stretching. The formation of small isolated pores with the complete burnout of the organic additive also has a favorable effect on the strength of agloporite.

Claims (1)

Formula of the invention The raw material mixture for the manufacture of agloporite, including clay raw materials, enrichment wastes and organic additives, which, in order to reduce water absorption and increase the softening factor of agloporite, contains clay as the clay raw material, enriched kaolin clays , and as an organic additive - black tar - waste oil and fat industry in the following ratio, wt.%: Clay Waste enrichment of kaolin clays Black tar - waste oil and fat industry 5-10 10-20 i 75-80 Table Table 2