SU1071770A1 - Thixotropic filling-up composition - Google Patents

Description

-h1

The invention relates to the mining industry, in particular, to the composition of the filling mixture, and can be used in the development of mineral deposits with a hardening laying of the open space.

A known backfill mixture containing sands with the addition of clay of 1180–1230 kg of sands per 1 m of mixture with a water ratio of 1: 1, the consumption of portland cement M-400 is 40.0 kg / m CI.

The disadvantage of this filling mixture is that it does not have thixotropic properties, which entails an increased consumption of cement to achieve the same strength, increased pipeline wear during transportation of this mixture through pipes, separation during laying, and an increased setting time.

The closest to the invention in technical essence and Achievable result is bacillus. on thixotrr mixture, containing tailings of concentrating mills, cement, and water L2J. .

The disadvantage of this mixture is that it does not provide for the use of a large fraction of an inert aggregate, for example tailings in heavy suspensions, or crushed rock with a size of 6-8 mm, which is found in large Volumes within the enrichment plants and mining industry. As with the use of these components, a large flow rate is required.

The purpose of the invention is to reduce the consumption of cement.

The goal is achieved by TeMj that a thixotropic basic mixture containing tailings of processing plants, cement and water, additionally contains a large fraction of an inert aggregate and clay when following the ratio of components, May.%:

Tailings of processing plants .4-60

Clay3-60

Coarse fraction inert aggregate 3-30 Cement. 1-14 Water; Rest

The results of laboratory tests are presented in the table.

For the tests, the following were the results: tailings of the processing plants with a grain size of 43 µm - 73%, clay with a grain composition of 43 mTkm - 16% and a large fraction of inert aggregate with a grain composition of +8 mm - 1%, +7 mm - 9%, 6 mm - one%.

As can be seen from the table, compositions 1, 6, 11 do not possess thixotropic properties due to insufficient water content — their mobility does not change under mechanical action, and its magnitude does not allow transporting such mixtures through pipes. These compounds do not reach the normative, strength, and after 90 days. Compounds 5, 10,. 15 also have thixotropic properties due to the high water content and, as compounds 1.6, 11, do not achieve standard strength.

Based on these data, for use, you should recommend the compositions of the filling mixture, in which the weight contents of the components are enclosed in the range, wt.%: Tailings of the processing plants4-60

Large fraction inert filler 3-30 Clay 3-60

Cement1-14

WaterEverything

Such a mixture makes it possible to use for the preparation of a thixotropic filling mixture a large mass of waste from the beneficiation industry, as well as crushed rock, which, in addition to expanding the scope of use, simultaneously results in a reduction in cement consumption.

Claims (1)

MORTGAGE * TIXOTROPIC MIXTURE containing tailings of enrichment plants, cement and water, characterized in that, in order to reduce cement consumption, it additionally contains a large fraction of inert aggregate and clay in the following ratio, wt.%:, ’. Concentration Tails 4-60 Clay3-60 Major fraction inert Nogo ₀ zapolnitelya3-30 Cement Water 1071770: