RU2317278C1 - Raw mixture for manufacture of the wall ash-ceramic articles - Google Patents

Abstract

FIELD: construction materials industry; other industries; production of the raw mixture used for manufacture of the wall ash-ceramic articles.

SUBSTANCE: the invention presents the raw mixture, which is pertaining to the compositions for manufacture of the wall ash-ceramic articles. The raw mixture used for manufacture of the wall ash-ceramic articles contains the micro-silica and ash. At that in the capacity of the ash use the ash produced at burning in the furnaces with the fluidized bed of the sand of the dehydrated deposits of the sewage disposal plants of the timber industry complex enterprises, which are characterized by the specific area of the surface - 115m²/kg in the grain composition of the ash the mass share of the particles of less than 0.14 mm makes 72 % containing in its chemical composition SiO₂ making 48.83 %, at the following ratio of the components: the micro-silicon - 30-40 %, the ash produced after burning of the dehydrated deposits of the sewage disposal plants of the industrial timber complex enterprises - 60-70 %. The technical result of the invention is the increase of the strength, the frost resistance and the factor of the design quality at reduction of the temperature of the ash-ceramic articles calcination.

EFFECT: the invention ensures the increased strength, the frost resistance and the factor of the design quality of the ash-ceramic articles at reduction of the temperature of their calcination.

2 tbl, 1 ex

Description

The present invention relates to the production of wall ceramic products and can be used for the manufacture of building materials.

Closest to the proposed raw mix according to the technical nature and the achieved effect is a raw mix, including (in wt.%):

- silica fume production of crystalline silicon (15-80) - high calcium ash - entrainment from burning brown coal (20-85)

[RF patent No. 2086517, MKI ⁶ C04B 35/14, 35/16, published August 10, 1997.].

The disadvantages of the known raw material mixture are relatively low values of strength, frost resistance and high firing temperature.

The technical result is an increase in strength, frost resistance and lowering the firing temperature.

The technical result is achieved by the fact that the raw material mixture contains silica fume, ash from burning dehydrated sludge from sewage treatment plants of industrial effluents of the timber industry complex with the following ratio of components (in wt.%):

- silica fume 30-40 - ash from the burning of dehydrated sludge from treatment facilities industrial effluents of the timber industry 60-70

Ash from burning dehydrated sludge from sewage treatment plants of industrial effluents of the timber industry complex is a large-tonnage dispersed waste generated by burning dehydrated sludge in furnaces with a fluidized bed of sand. The specific surface area of the ash is 115 m ² / kg; the residue on sieve No. 008 is 40%; bulk density of 1165 kg / m ³ ; in the grain composition of the ash, the mass fraction of particles less than 0.14 mm is 72%; specific effective activity of natural radionuclides (Bq / kg) - 74.02 ± 13.16.

The chemical composition of the ash from the burning of dehydrated sludge from treatment facilities of the Ust-Ilimsk timber industry complex (in wt.%):

SiO ₂ - 48.83%; Al ₂ O ₃ - 0.34%; Fe ₂ O ₃ - 0.39%; CaO - 1.67%; MgO - 0.78%; SO ₃ - 6.15%; P ₂ O ₅ - 3.62%; K ₂ O - 0.11%; Na ₂ O - 28.36%; Mn ₃ O ₄ - 1.19%; TiO ₂ - traces.

Example

The manufacture of the material is as follows. Raw components are mixed in the dry state. Water (16 wt.%) Is added to the resulting mixture and the samples are molded by semi-dry pressing at a specific pressure of 20 MPa.

Dried at 70-90 ° C, the semi-finished product is fired at a temperature of 950 ° C.

Mixture formulations and physicomechanical characteristics of products based on them are presented in Tables 1 and 2.

Table 1 Components The amount, wt.%, In the compositions one 2 3 Prototype Ash from burning dehydrated sewage sludge facilities 70 65 60 - industrial effluents of the timber industry Silica fume thirty 35 40 15-80 High calcium fly ash from burning brown - - - 20-85 coal table 2 Structure one 2 3 Prototype The average density, kg / m ³ 1506 1445 1400 1120-1460 Compressive strength, MPa 35.1 34.0 31.9 11.4-21.3 The coefficient of structural quality * 10 ^-2 , MPa / (kg / m ³ ) 2,33 2,35 2.28 1.02-1.54 Softening coefficient 0.98 0.97 0.98 0.84-1.1 Frost resistance cycles one hundred 105 one hundred fifteen Water absorption, wt.% 28.5 29.1 30.8 23.4-34.0

Claims (1)

The raw material mixture for the manufacture of wall ceramic-gold products, including silica fume and ash, characterized in that the ash used is ash from burning dehydrated sludge from sewage treatment plants of industrial wastes of the timber industry complex in furnaces with a fluidized bed of sand, characterized by a specific surface area of 115 m ² / kg, grain composition of ash, the mass fraction of particles less than 0.14 mm - 72%, the content in its chemical composition of SiO ₂ , comprising 48.83%, with the following ratio of components,%: silica fume 30-40 dehydrated sludge ash sewage treatment plants timber industry complex 60-70