SU916526A1 - Dust binding composition - Google Patents

Description

The invention relates to mining, and in particular to the fight against dust on roads in the development of minerals in the open way and can be used to protect against soil erosion, processing dumps, creating a protective film on the surface of minerals (coal, ore, etc.) during transportation their long distance storage, etc.

Known. Dust-binding emulsion based on organic binders and aqueous solutions of emulsifiers. So, for dedusting, anionic slow disintegrating emulsions prepared from bitumen of the grades BND-200 / / 300, MG-130/200 and MG-70/130 are used with the use of surfactants as emulsifiers: higher organic acids (fatty, resin, naphthenic, sulfonaphthenic) or their salts with the addition of alkaline substances, for example, caustic soda GGOST 22bЗ ~ 71), liquid glass (GOST

2

13078-67), sodium tripolyphosphate (GOST 13493-68) [1].

The disadvantages of these compositions include the scarcity of bitumen, the complex technology of producing emulsions, the need to use special equipment (bitumen-melting units, steam formers, homogenizers, dispersants, etc.), fractionated rubble, and that. in case of non-rigid road surfaces, the emulsion-treated surface layer is destroyed by the action of the wheels of heavy-duty dump trucks, and dust emission is resumed.

The closest to the proposed composition of the components and the achieved result is a dust-binding substance (universin), which is a mixture of extracts of selective purification of oil fractions with a boiling end no higher than 430 ° C (7080 masd) and sulfur residues 916526 4

tey (cracking residue, tar, asphalt 20-30 wt.% (TU-38.101776-79) C2].

The disadvantage of this substance is a relatively high viscosity (E £ ₀ = 3 “5 °), which makes it difficult to process wear layers of coatings that have a significant amount of dust fraction (5 wt.%). The high cohesion of a universal requires the use of special pumps when pumping it and when spilling (gear, three-screw, etc.), especially at air temperatures from 0 to 10 ° C. When gravity spill spills, the university is distributed unevenly, in the form of tracks. As a result, the watering vehicle needs to pass through the treated area repeatedly, which causes an increased consumption of the substance and an increase in time for its absorption up to 4-8 hours; which is irrational from a technological point of view. At the same time, the depth of spill, depending on the degree of rolling, is 2-10 mm.

The purpose of the invention is to increase the efficiency of dust binding.

This goal is achieved that the dust-binding substance, including univerin, additionally contains 20-50% “Ny aqueous sulphite-yeast mash solution in the following ratio, wt.%:

Universin 10-30 '

20-50% aqueous solution of sulphite yeast brew 70-90

Example. Dust binding

The substance is prepared by mixing a uniform with an aqueous solution of sulfite yeast brew (RRM) using a mixer, for example, FMR-BZ type flotation machines. For better mixing, the components are preheated to 6 ° -8 ° C. Mixing is carried out for 5 minutes, after which the substance is ready for use. The dust binding agent is applied to the road surface or. rock mass by gravity spill or under pressure up to 0.1 MPa

The dust binding agent on the basis of the universina is a homogeneous mechanical mixture of emulsion type, whose viscosity (Ee0 = 1, B) is low, which allows pumping it with centrifugal pumps and treating the surface of roads by spraying using conventional watering machines, for example, type PM-130.

In tab. 1 shows the physico-mechanical data of the dust-binding substance and the tensile strength of the samples treated with this substance.

T a b persons 1 Dust binding substance Content% Viscosity, Surface tension 6 N / m Compressive strength of specimens after 14 days, MPa The content of the emulsion in the water wash,% SDB 20% 70 Universin thirty 1.8. 35.4 0.7663 0.05 SDB 20% 80 Universin 20 1.6 39.1 3,991 Traces SDB 20% 90 Universin ten 1.4 44.9 2,072 0.5 RMS 50% 70 Universin thirty 2.0 34.99 1.249 0.5 RMS 50% 80 Universin 20 1.8 32, $. 4.325 Traces RMS 50% 90 Universin ten 1.5 33.11 2.5 1.0

5 91 <

The criterion in determining the concentration and amount of emulsifier injected is the compressive strength of soil samples treated with a dust-binding agent. In this case, the optimum content of the universal is 10–30 wt.%. A further increase in the concentration of the universal leads to an increase in the viscosity of the mixture and a decrease in the strength properties of the treated soil. 1® The optimal amount of injected 20-50% aqueous solution of emulsion6

torus (sulfite-yeast brew) is 70-90 wt.%. A further increase in its concentration leads to an increase in water flowability of soil samples treated with a dust-binding substance.

In tab. 2 shows comparative data characterizing the physical properties of dust-binding substances, as well as their effectiveness in dust-wiping.

Table 2

one Indicators . Substance the famous proposed Purpose Against adhesion of rocks, dust formation and blowing dry goods Also YU Density 0.965 1,035 Flash point 165 Does not burn Pour point, ° С -five -four Conventional viscosity at 50 ° С, Engler hail 4.1 1.2 The effective period of dedusting of roads, days 7 ten The cost of 1 thousand rubles. 22 eleven

The application of the proposed dust-binding substance reduces the consumption of Universin five times; an increase in the rate of wetting and the depth of impregnation of the soil; reduction of air dustiness on the roads to sanitary standards for 8-10 days at a traffic intensity of up to 100 auto / h; reduction of operating costs for dedusting of roads (actual Economic, the effect of the introduction of 100 tons of the substance is ³⁰ 2000 rubles, the annual economic effect on Uchalinsky mine - about 44 thousand rubles ” ³³ a Also excluding the loss of coal and other bulk materials from blowing during storage and transportation.

The economic effect is 100-200 thousand rubles. per 1 million tons of coal transported,

Claims (1)

Claim Dust binding agent, including universin, characterized in that, in order to increase the efficiency of dust binding, it additionally contains a 20-50% aqueous solution of sulphite-yeast brew in the following ratio of components, May. %: Universin 10-30 20-50% aqueous solution of sulphite yeast brew 70 "90