METHOD FOR DETERMINING THE SUITABILITY OF ROCKS  FOR PROCESSING IN A PARTICULAR TYPE OF FIBER

 

For simplified determination of the suitability of raw materials for the production of various kinds of fibers from rocks, using only their chemical composition, the example of ten typical deposits in Ukraine, proposed a chart developed by the method of Dr. A. Novytskyi, which gives an opportunity to reveal the character of the relations between the major rock-forming oxides - SiO2, Al2O3, Fe2Oz + FeO, MgO, CaO, Na2O + K2O. The connection point of the vectors indicates the ratio of silica and alumina in the breed. The number at the point of connection points to the number of fields in the table 1. The projection of the vector in the vertical direction of rotation on the axis Fe2Oz + FeO (Fig. 1, a) determines the amount of the amount of iron oxide, the horizontal axis is the projection on the calcium-oxide CaO.

а

б

Fig. 1. Diagram of relations basic oxides of basalt raw material for different types of fibers (a), the modified projections of (b).

The projection of the vector in the vertical direction of rotation on the axis of MgO determines Number of magnesium oxide, the horizontal projection of the vector on the axis of Na2O + K2O determines the projection of the amount of sodium and potassium oxides. As can be seen from the diagram, there are two areas where get intersection points of the vectors.

Table 1.
The average chemical composition (% by weight) of rock deposits in Ukraine

№	Rock	SiO2	TiО2	А12Оз	Fе2О3	FеО	MgO	CaO	Na2O	K2O
1	Kirov	58,9	0,95	17,3	1,93	6,97	2,33	6,54	2,54	2,68
2	Selcev	55,6	0,66	19,4	7,54		3,84	7,91	1,86	1,56
3	Krivoj Rog	54,6	0,2	13,3	1,9	9,0	5,56	4,44	2,09	1,31
4	Podgornjanskoe	52,8	1,17	18,14	5,28	5,1	3,72	8,44	2,24	1,37
5	Elnovskoje	51,1	0,4	21,1	12,3		2,3	5,2	6,7
6	Berestovec	49,03	2,85	12,59	3,88	10,15	5,47	9,54	2,34	0,66
7	Ivanova Dolina	48,8	2,75	15,0	8,47	6,39	5,13	8,34	1,5	0,75
8	Talnoe	48,5		16,0	16,5		6,0	9,5	2,5
9	Isachkovskoe	47,3	0,9	16,2	13,5		5,3	13,4	3,1
10	Kamishevahskoe	46,1	3,9	13,9	5,5	7,5	5,1	6,2	3,5	2,4

                                                           Depending on the processing of the rocks, which are located in different zones, should take place on different technologies. In particular zone B describes the most suitable raw material for the production of continuous basalt fiber. The rocks are located in the zone A is more suitable for the production of staple basalt fibers. Note that the angles between the vectors are different, in the zone A more acute, due to the high alkali content.

 As can be seen from the figure 1.b ratio of magnesium oxide to calcium oxide and Na2O + K2O to Fe2O + FeO unrepresentative and to characterize the quality of the raw material is necessary to investigate the relation shown in Fig. 1.a. In zone B typically centered intersection point vectors which characterize the feedstock with a high percentage content A12O3 therefore possible to conclude that for the production of continuous basalt fibers need higher content of oxide in the rocks. In addition, these rocks are characterized by a high content of SiO2.