SU662734A1 - Filling mix - Google Patents

Description

one

The invention relates to the mining industry, in particular, to the composition of the filling mixture, based on the tailings of the processing plants and used to fill the mined-out areas of underground mine workings.

A known backfill mixture containing tailings of the processing plants, cement and water. In this filling mixture, tailings of processing plants containing sand and sludge fractions are used; however, the content of slimes with a particle size of -45 microns in sands should not exceed 8-36% of the total solid weight. For successful filling operations, the weight concentration of the slurry must be maintained at least 63-65%, and the volume ratio of solid to liquid is about 1: 2, the ratio of tailings of the processing plants to cement is assumed to be 1: 10 1.

The disadvantage of this filling mixture is that the tailings of the beneficiation plants are not fully used for the preparation of the filling mixture and require additional work to isolate them from these fine fractions. Besides

In addition, a high water content (solid to liquid ratio is 1: 2) in the tab leads to the need to construct expensive drainage and filtration facilities.

The backfill mixture is known, containing the tailings of the processing plants, slag, lime and water 2. In a known backfill mixture, the components are taken in the following ratio:

Tails of processing plants, t1.20

Slag, t0.40

Lime, t0.008;

Water, 4

The disadvantage of this filling mixture is that it uses only the tailings of the processing plants with a fraction of 85 µm or more.

Isolation from the tailings of the processing plants of the + 85 µm fraction fractions is associated with multiple hydro-cloning, significant capital and operating costs.

Claims (3)

The closest technical solution to the invention in its essence and achieve the vio-yy effect is a filling mixture containing ground copper-nickel slag 300-350 kg, granulated slag with an admixture of heat tailings, in an amount of 20-30% - 1600 kg, portland cement 300 110-120 kg and water in the amount of 50,000 liters. 3 The disadvantage of this filling mixture is that it contains tails that are enriched, in an insignificant quantity, and mixed with granulated slag, i.e., it shathes YesTb. tailings of processing plants and not a slurry fraction from tailings of the processing plants is used. The aim of the invention is to reduce ° C and the operating costs in the preparation of the filling mixture and work) C associated with the laying of the goaf, by fully utilizing the tailings of the processing plants. This is achieved by the fact that the filling mixture contains tailings of the processing plants, slag, cement and water in the following ratio of components, weight. %: Tail dressing plants42.0-80.0 Slag2.5-16.5 Cement1.2- 6.5 Water 14.0-40.0 Ex. To obtain a filling mixture of this composition with strength, for example, 20-25 kgf / cm, the components are taken in the following ratio, weight. %: Tailings of concentrating mills 67.0 Ground phosphate slag 9.6 Cement 4003.4 Water 20 Example 2. Seeding mixture from the bottom factories. tails tailing weight. %:,. Tailings of dressing plants 42.0 Ground phosphate slag 12.5 Cement 4005.5 Water 40.0 The resulting strength of the filling mixture is 25-30 kgf / cm. Example 3. Target mixture with the upper limit of tailings of the processing plants, wt.%: Tailings of the processing plants 80.0 Ground phosphoric slag 3.5 Cement 4001.8 Water14.7 The resulting strength of the filling mixture is 10-15 kgf / cm. “Due to the complete utilization of the slurry fraction of tailings of the processing plants, they are no longer necessary to classify them in hydrocyclones, which significantly reduces the capital and operating costs associated with the formation of filling mixture. Claims Backfill mixture containing tailings of processing plants, cement and water, characterized in that, in order to reduce capital and operating costs, by fully using the tailings of the processing plants, the components are taken in the following ratio, wt.%: Tails processing plants42.0-80.0 Slag2.5-16.5 Cement1.2-6.5 Water14.0-40.0 Sources of information taken into account during the examination 1. Smoldyov A.E. Technologists and mechanization of backfilling , Moscow, Nedra 1974, p. 145-148. 2. Malakhov G. M, and others. The choice of cost-effective compositions hardening bookmarks. Mining Journal, 1968, No. 10, p. 34-37. 3. Yurkevich GF, et al. Hardening mixtures with the addition of surface-active substances. The collection "Issues of improving the technology of underground mining. Academy of Sciences of the USSR, Apatity, 1976, p. 54-60.