SU1217843A1 - Raw mixture for producing silica brick - Google Patents

Description

The invention relates to the building materials industry and can be used in the manufacture of silicate bricks.

The aim of the invention is to increase the strength, water and frost resistance.

Example. Waste production of caprolactam is a lumpy gray material containing, by weight,%: sodium sulfate 25-33, sodium carbonate 46-52, sodium chloride 12-13, caustic soda the rest.

Ferrochromic slag is a pierced material with metallic chromium containing, in May. %: J - dicalcium silicate 70-80, And - dicalcium silicate 5-10, periclase 9-11, spinel 1.3, calcium chromate else, with the following chemical composition, wt.%: CaO 50-52; AljO, 6-7; SiO 26-28; MgO 9-12; FeO 0.3-1; , 0.7-0.9; CrjO- the rest.

The specific surface area of ferrochrome slag is 250 cm- / kg (PSC),

As sand, a waste of dry separation enrichment of phosphate ores is used, which is a fine-grained (modulus of particle size 1.9-2.0) low-quartz sand, containing wt.%: Quartz 50-65; phosphorite 10-15; 3-5 calcite; field pshats 10-20; hydromica 10-20; glauconite rest with the following chemical composition, wt.%: Si02 50-70; , 2 -3; 1-3; CaO 8-10; MgO 0.3-1.0; PjOj 3-6; 0.6-1.5; 0.8-2.0; j SOj 0-1; ppt rest.

1 2 3

four

In addition, this raw material mixture may contain quartz, quartz-feldspathic and feldspathic sands as sandfill. The raw mix is prepared, from lime, ground to a specific surface of 500 m / kg, ferrochrome slag, ground to a specific surface 500, fine ground silica component, ground to a specific surface 300, caprolactam production waste, ground to a specific surface 500 and sand-aggregate.

The ground components and the sand-aggregate are mixed in the ratios given in table. 1, columns 2-7.

In tab. 1 shows the compositions of the proposed raw mix, prototype and known, and the results of physical and mechanical tests.

Pre-hardened raw materials

The mixtures are moistened (moisture 5%) and formed into cylinder samples with a height of 42 mm and a pressure of 20 MPa. Samples-cylinders under-: cast by autoclave treatment according to the mode: 1.5-8-1.5 h at a temperature of 175 ° C and a pressure of 0.8 MPa. Then the samples are tested for compressive strength, frost resistance and water resistance.

In tab. 2 shows the compositions and test results of the proposed mixture using various types of the silica component.

Table t

Continued table.

In examples 1-6, the waste of dry separation separation of phosphate ores, c. Examples 7-9 as ground sand - quartz sand, and as a reserve in example 7.- waste of dry separation separation of phosphorite ores, in example 8 - quartz sand, in example 9 - psiv-spar sand .. ...

Compiled by T.Selchenkova Editor A.Lezhnina Tehred A.Ach

Order 1079/29 Circulation 640

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch PPP Patent, Uzhgorod, Proektna St., 4

 Continuation of table 2

Proofreader V.Sinitska

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Claims (1)

RAW MIXTURE FOR MANUFACTURE OF SILICATE BRICK, including- _; lime, ferrochrome slag, wet ^: poured sand and aggregate sand, characterized in that, in order to increase strength and water resistance to frost, it additionally contains caprolactam production waste in the following ratio of components, wt.%: Lime 1-4 Ferrochrome slag 10-15 Ground sand 6-14 Caprolactam production waste 0.1-1.5 Placeholder Else Else 1 12