SU833814A1 - Raw mixture for claydite production - Google Patents

Description

The invention relates to the production technology of building materials and products and can be used in the production of lightweight aggregates in the building materials industry.

A known raw material mixture for the production of expanded clay, including clay raw materials and intumescent additives, where distilled naphthenic acids hl are used as intumescent additives.

The disadvantages of this intumescent additive are low swelling. mass during firing and a high volumetric weight of the product, which leads to the production of heavy and expensive expanded clay fairies consumption of deficient naphthenic acids.

The closest to the proposed technical essence and the achieved effect is a raw material mixture for the production of expanded clay, including clay raw materials, a hydrocarbon fraction (0.25-2.6%) and mineral oil refining waste - gacha de-oiling filtrate (0.5- 1.0%) [2].

The disadvantages of this raw material mixture are the insufficient strength of expanded clay 0.53 MPa, relatively.

high bulk density of 497 ’kg / cm \ At the same time, the cost of the oil dehydration oil filtrate is 10-15 r / t

The purpose of the invention is to increase the strength, reducing the bulk density of expanded clay and its cost.

This goal is achieved by the fact that the raw material mixture for the production of expanded clay, including clay raw materials, hydrocarbon fraction and refining waste of Mineral oils, contains waste refining of mineral oils with bleaching clays in the following ratio of components, wt.%:

Clay. Raw materials Hydrocarbon fraction

Mineral waste

94.0-99.0

0.5-1.0

0.5-5.0 oils with bleaching clay

For the experiments, clay raw materials of the Zhurzhevo-2 deposit ^{, g} , used at the Vitebsk plant of building materials (VKSM), with 25 of the following physicochemical characteristics, are used:

Humidity, wt.% 25

Plasticity, class1

Chemical composition, wt.%:

Si 0 g 54.7

A1 _x 0 ₃ 19.2

F e gO 8.7

CaO5.2

MdO4.3

SO? .Traces

pp 7.9

The hydrocarbon fraction used for the experiments has the following characteristics:

Density at 20 ^₽ C, g / cm3 Refractive index, Viscosity condition 0.9551 1.5528 Naya, ° WU at 50 ° C 6.76 Acidity, mg KOH / 100 ml 8.54 Molecular weight 330 Fractional composition, ° C H; K. 325 K.K. 460 Mineral refining waste composition oils with bleaching clays, wt.%: Organic mass Paraffin-naphthenic hydrocarbons 2.9 Aromatic coal hydrogens 3.2 Monocyclic 3.2 Bicyclic 10,4 Polycyclic 12.1 Resins 8.9 Inorganic mass S ί 0 2. 26.7 Αΐΐθ ¹ ? 24.5 5.9 Cao 3.3  MDO 2.1

The waste used is organoclay (OG).

Preparation of the mixture is as follows.

The hydrocarbon fraction is mixed with exhaust gas, introduced into clay raw materials with thorough mixing.

- The resulting mixture is thoroughly mixed, granulated, dried at 460 ° C for 22 minutes. The firing is expanded at 1050 ° C for 9 minutes.

¹ Table 1 shows the proposed mixtures, * in table. 2 - expanded clay preparation technology) in the table.Physical and mechanical indicators.

T a b l and c a Components] Content, weight . %, in compa- in ah 1 ^! ί 2 | 3 14 Clay raw materials Waste treatment · mineral- 98, 5 97.0 96.5 94 ,5 of them oils (OG) 0.5 2.0 3.0 5 0 Hydrocarbon fraction 1,0 1,0 0.5 0 ,5

T a b l c a '. 2

Indicators Composition 1 , 2 ieeze: her:

Temperature mixing ° C: 71 73 69 70 drying 461 463 460 458 firing 1050 1048 1052 1041

Duration. · Min:

drying roasting 21 20 24 9 8 8 23 9 Table 3 Indicators Composition EEIEEIELE R

Volumetric j weight, kg / m 405 386 375 360 Strength: MPa 1.73 1,67 1,64 1,52 Frost resistance cycles 18 17 16 16 .

Water absorption -

wt.% 19 21 22 23 From the above data can behind-

To conclude that the introduction of organoclay into the mixture in an amount of 0.5-5.0% provides an improvement in the physicomechanical parameters of expanded clay.

In addition, the use of exhaust gas in the production of expanded clay solves the problem. protect the environment from pollution, since the exhaust gas is difficult to recycle and is currently dumped.

The introduction of exhaust gas into the mixture reduces the cost of expanded clay.

The annual economic effect of the introduction of the proposed mixture will be 20,000 p. when using 2000 t / g exhaust.

Claims (2)

(54) RAW MATERIAL MIXTURE FOR PRODUCTION OF CERAMSITE The coal used for the experiments per fraction has the following characteristics: Density at 20 ° C, g / cm3 0.955 Refractive index, Pr ° 1,552 Viscosity is relative, WU at 6.76 Acidity, 8.54 mg KOH / 100 ml 330 Molecular weight Fractional composition, C, H; K. Composition of mine-oil cleaning waste with bleaching clays, Organic mass Paraffin-naphthenic hydrocarbons Aromatic hydrocarbons Monocyclic Bicyclic Polycyclic Resins Inorganic mass S i O i AliO CaO 3,3 HgO 2,1 The used waste is nogliny (OH). The mixture is prepared as follows. The hydrocarbon fraction from the exhaust gas is introduced into the clay with careful transfer. The resulting mixture is thoroughly mixed, granulated, su at 460 seconds for 22 minutes. The swelling takes place at 9 minutes. Table 1 shows the mixture compositions, Table 2 shows prepared and expanded clay JB physico-mechanical demonstrations. T a b l Clay raw materials 98.5 97.0 96 Waste from waste oil (EG) 0.5 2.0 3 Hydrocarbon fraction 1.0 1.0 0 T a 6 l and q a 2 Temperature, C: mixing 71 7369 70 drying 461 463460 458 1048 .1052 1041 firing 1050 Duration, min: drying 21 24 23 firing 9 89 Table 3 Volumetric weight, kg / m 405 386375360 Accuracy; 1,671,641,52 MPa Frost resistance, cycles 18 171616. Water absorption, wt.%, Wt.% 19 From the above data, we can conclude that the introduction of organoclay into the mixture in the amount of 0.5-5.0% provides an improvement of the physical and mechanical properties of claydite. In addition, the use of exhaust gases in the production of expanded clay solves the problem. environmental protection from pollution, since the exhaust gas is a hard waste and is currently being dumped. The introduction of exhaust gas into the mixture reduces the cost of expanded clay. The annual economic effect from the introduction of the proposed mixture will be 20000 r. when using 2000 t / g exhaust. The invention Raw materials mixture for the production of expanded clay, including clay raw materials, hydrocarbon fraction and waste 5833 purification of mineral oils, about tl and so that, in order to increase strength, reduce the bulk weight of claydite and its cost, it contains waste mineral oil bleaching clays with the following ratio of components. weight.%: clay-raw materials 94, 0-99.0 Hydrocarbon fraction 0.5-1.0 8146 Waste of mineral oils with bleaching clays О, 5-5.0 Sources of information taken into account during examination 1. Auto skoe certificate USSR № 467889, cl. From 04 To 21/02, 1972, 2. USSR author's certificate in application number 2552052/33, class, -C 04 B 31/20, 1977.