SU1268551A1 - Refractory packing compound - Google Patents

Abstract

The invention relates to the refractory industry and can be used in metallurgical industry for lining melting units. The invention allows increasing the resistance of a refractory ramming mass based on quartzite, containing 10–15 wt.% Zircon concentrate, 15–20 wt.% Graphite, 15–20 wt.% Refractory clay, and 8.29, 0 wt.% Water, through the introduction of 15-20 wt.% corundum and 0.8-2.0 wt.% phosphoric acid. 1 hp f-ly, 2 tab.

Description

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U1 SP 1 The invention relates to refractory industry and can be used in metallurgical industry, as well as in foundries of the engineering industry for lining melting furnaces. The aim of the invention is to increase slag resistance. The mass is prepared as follows. A forced vane mixer is loaded continuously in the appropriate proportions of zirconium concentrate, graphite, refractory clay, quartzite and mixed for 3-5 minutes. After obtaining a mono mixture, orthophosphoric acid is added and mixed for 1-2 minutes. Then moisten with water and stir for 3-5 minutes. The prepared mass is released in 2-3 hours, after which it is ready for use. The compositions of the refractory mass are given in Table 1; The main physico-chemical properties of the mass are given in Table 2. The refractoriness of the mass is 1700 ° C, the application temperature is 1600 ° C, and the heat resistance (1DPA ° C-Boda) 12 is heat exchange. Slag tolerance tests were carried out in crucibles with an outer diameter of 50 mm and an internal diameter of 25 m. 30 mm high. Crucibles are made in metal forms, then dried at 160-180 ° C to constant weight. The tests are carried out as follows. 111lac is loaded into crucibles and placed in an oven for 4 hours at. The following slag is used for the test, wt.%: Al, jO, 18.08 FejO,; 5.88

Claims (2)

Table 1 1 19.17 5.0 5.80 0.35 0.21 0.123 Else After cooling the crucible, inspect. To determine the magnitude of the impregnation of an asy with molten slag, crucibles are cut in half. The crucibles of compositions 1.3 at the points of contact with the molten slag are impregnated laterally by 0.5-1.2 cm, and from the bottom by 0.3 cm. The crucible of composition 2 is impregnated laterally by 0.3-0.5 cm, and from the bottom, 0.3 cm. The structure of the mass of the compositions 1,2,3 after the test is not broken, there is no trash. Claim 1. Refractory padded mass, including quartzite, zircon concentrate, graphite, refractory clay and water, from. In order to increase slag resistance, it additionally contains corundum and orthophosphoric acid in the following ratio of components, wt.%: Zircon concentrate 10-15 Graphite15-20 Refractory clay 15-20 Water8.2-9.0 Corundum 15-20 Orthophosphoric acid 0.8-2.0 Quartzite Else 2. The mass of pop. 1, characterized in that it contains corundum of a fraction of 0.5-1.0 mm 50 wt.%, 0.09-0.5 mm 25 wt.% And less than 0.09 mm 25 wt. .%. Zircon concentrate Corundum powder Graphite 10 13 15 15 17 20 15 18 20 Components Refractory clay Orthophosphoric acid Water Quartzite Compressive strength, kg / cm 1268551. TT Continued Table 1 The content of components, wt.%, In the composition 18 13 0.8 20 2,0 1.0 8.2 8.5 ° 6.0 24.5 14.0 Table 2 345 325 300