SU775076A1 - Charge for producing claydite - Google Patents

Description

one

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

A known method for preparing a mixture in the production of a lightweight aggregate, for example, expanded clay, consists in mixing clay with coal, a liquid organic additive and water.

Significant disadvantages of this method are: the need to prepare fine coal, which requires significant costs, the use of valuable expensive components (coal, oil shale, kerosene), poor suspension pumpability, insufficient homogenization of organic additives in clay, which leads to uneven sludge - Milling, low strength and high volumetric weight of semi-expanded clay.

Closest to the proposed mixture for the production of expanded clay, including clay raw materials, pyrite 25 cinder, sour tars, in the following ratio of components, wt.%: Clay raw material 90-93 Pyrite cinder 6-8 Acid tars 1-3 2. 30

However, such a mixture has a high bulk weight of expanded clay due to the uneven distribution of the organic additive.

The purpose of the invention is to reduce the bulk density while maintaining strength due to the uniform distribution of the organic additive.

The goal is achieved by the fact that the charge, including clay raw materials and KIS.PYY tar, additionally contains a hydrocarbon fraction in the following ratio of components, May.%

Clay raw materials 94-99

Sour tar 0.1-4

Hydrocarbon

fraction 0.9-2

Characteristics of materials

Clay raw materials ..

The clay raw material of the Zhurgina-2 deposit, used at the Vitebsk building materials combine, which has a moisture content of 25% by weight, plasticity grade 1,

Chemical composition, wt.%: SiOj 5J, 7; 19.2; Re, 0h 8.7; CaO 5.2; MgO 4.3; SO, footprints; ppt 7.9. But the acid tar of the Opolotsk PNZ has a density at 20 ° С of 1.0546 g / cm viscosity at 80 ° С (by a viscometer with an opening of 5 mm according to GOST 11503-65) 913 sec. Group chemical composition: sulfuric acid. 12.13; water 4.25; organic weight 83.62. The hydrocarbon fraction has a density of 0.9551 g / cm, the refractive index, 5528; viscosity is conventional at 50 ° C 6.76 WU; acids jHocTb 8.54 mg KOH / 100 ml; molar mass 330. Fractional composition, IC 325; kk 460. The manufacture of expanded clay from this mixture is carried out as follows: 0% by weight of acidic tar with a temperature of 40-80 ° C is introduced into 0.9-2 wt.% Of the hydrocarbon fraction heated to 90-200s. The organic mass is stirred for 1-15 minutes and the resulting emulsion is introduced in 94-99 wt.% Of the clay raw material. The resulting mixture was thoroughly mixed, granulated and dried for 20-25 minutes at 200-500 ° C. Firing and expansion were performed at 10101080 ° C for 7-12 minutes. EXAMPLE 2 wt.% Of acid tar with a temperature of 75 ° C is introduced into 2 may.% Of the hydrocarbon fraction heated to. The resulting organic mass is stirred for 10 minutes and introduced into 96% by weight of the clay raw material. After granulation, the mixture is dried at 440 ° C for 23 minutes. Calcination and swelling take place at 1050 ° C for 8 minutes. The resulting claydite has the following properties: bulk weight 360 kg / m, strength 1.84 MPa, frost resistance 15 cycles, water absorption 19 wt.%. To compare the effect of the hydrocarbon fraction on the decrease in the bulk weight of claydite while maintaining its strength, claydite with a hydrocarbon fraction content of 0.8 and 2.5 wt.% And from the known mixture was made, the results are tabulated.

94

four

2,290 1.79

98

0.2

1.8 380 1.85

99

0.1 410 1.97

0.9

96

3.2 320 0.64

0.8

94

3.5, 290 0.76

15

sixteen

20

sixteen

sixteen

22

Hydrocarbon

fractions

Clay raw materials

Sour tar

Claims (2)

Pyrite cinders From the table it follows that the volume mass of claydite obtained from the proposed charge is less than the volume mass of claydite obtained from the known 1.2-1.7 times. Claims for the production of expanded clay, including clay raw materials and acid tar, characterized in that, in order to reduce the bulk density while maintaining strength due to the uniform distribution of the organic additive, it contains additional 7750766 Table continuation 17 18 1.82 in a hydrofluoric fraction with the following ratio of components, wt%: Claycfbe94-99 Acidic tar 0.1-4 Hydrocarbon fraction 0.9-2. Sources of information taken into account in the examination 1. The author's certificate of the USSR №252167, cl. From 04 To 21/00, 1967, 2. Authors certificate of the USSR 500200, cl. From 04 To 21/00, 04 To 31/02, 1973.