SU1146477A1 - Filling composition - Google Patents

Abstract

MOLDING MIXTURE containing tailings of processing plants, sticking, coarse inert aggregate and water, characterized in that, in order to simplify the technology of mixture preparation and expand recycling of production waste, the mortar mixture contains cement, and as a large inert aggregate - the light fraction of the enrichment of ores in heavy suspensions in the following ratio of components, wt.%: Tailors of the enrichment plant 58-70 1.5-5.0 Cement The easy fraction of the enrichment. (L ores in heavy suspensions 13–25 oz x Else Water; O) 4

Description

I The invention relates to the mining industry and can be used in the underground mining of mineral deposits with the Elaborated Space tab. The backfill mixture is known, containing, in wt.%: Tailings of the processing plants 55-60; cement (by-product of zinc production 10-15i is empty rock 22-25 and water 1,. The disadvantages of this composition are high cement consumption and a large number of components of the mixture, which increases its cost The most close to the technical essence and the achieved result to the proposed is basic a mixture containing, by weight,%: tailings of the beneficiation plants 40-45; punching 1-6.0; crushed stone 18-23; waste processing bauxite ores 12-17. and water The disadvantages of the known mixture are complex technology and for a large amount The components of the invention are the simplification of the mixture preparation technology and the expansion of waste disposal. The aim is to ensure that the basic mixture containing the tailings of the enrichment plants is large, inert aggregate and water, it contains cement in its quality, and a large inert aggregate - a light fraction of ore processing in tons of green suspensions in the following ratio of components, min.%: Tailings 58-70 processing plant Rick 1.5-5.0 Cement Light fraction of ore enrichment in heavy 13-25 suspensions Remaining Water A crushed light fraction with a particle size distribution shown in Table 2 is used as a large aggregate. 1. 77 Fine aggregate are tails, the particle size distribution of which is given in fa6n. 2. The composition of the filling mixture varies depending on the content of the coarse fraction. The mixture is processed in a special activator-activator mixer, which allows thixotropic dilution of the mixture. Samples of the sample mixture are placed in the form of 100-100-100 mm to determine the strength of the tabs at the age of 28 days. The backfill mixes in the experiments are selected in such a way as to ensure the normative strength of the bookmark at the age of 28 days 2.5-2, -7 MPa, required by the conditions of field development. In the process of preparation, filling mixtures determine their mobility characterizing transportability. For transportation of the mixtures through the pipes of the minimum acceptable mobility value of 10 cm. The water content in the mixtures takes 15-22%, since increasing the water content above 22% does not allow an excess of mixtures to produce the effect of toxic dilution due to the separation of the mixture, and with a decrease in water content below 15% of water is not enough to ensure the normal course of the hydration process. The research results are summarized in table. 3 Conducted laboratory studies show that the filling mixture. having a ratio of components in the said pairs, after being prepared in the mixer-activator, as a result of solidification at the age of 28 days, they have a strength of 2.8-4.2 MPa. In addition, such mixtures are characterized by thixotropic properties, which in this case is confirmed by a significant improvement in their mobility (see, for comparison, composition 16, which has not been subjected to mechanical pulses in a mixer-activator). Due to their high mobility, packing mixtures with a ratio of components within the specified limits can be transported through pipes in a drift mode with a relative transportation distance of LfH equal to 6-7 with sufficient hardening strength after 28 days.

311464774

Using the invention allows the mixture to expand the possibility of utilization to simplify the technology of preparation of mining waste.

Table 1

Easy

78.35 17,631,30,54 fraction,%

Content24,632.1%

46 920

2

48

960.

50

1000

li

1080

55 1095

70 1400

7J

1420

five

1300

0.26

0.94

0.98

table 2

13.3

7,8

17.4

Table 3

20.5

2.8

19 3.0 3.2

15

14 3.5

16 3.8

10 3.2 2.9 2.8 Note.

 Continued table. 3 In the technology of filling operations, only mixtures that provide 2.5-2.7-MPa strength and mobility within 10-16 cm can be used. Mixture 16 is processed only in a mechanical mixer, Mixture 17 and 18 only from flotation tailings.

Claims (1)

FILLING MIXTURE containing tailings of concentration plants, an astringent, a large inert filler and water, characterized in that, in order to simplify the technology of preparing the mixture and expand the disposal of production waste, it contains cement as a binder and a light fraction as a large inert filler ore concentration in heavy suspensions in the following ratio of components, wt.%: Tails of dressing plants Cement Light fraction of ore concentration in heavy slurries. ziah Water 58-70 1.5-5.0 hours 13-25 Else SU, "1146477