SU1375836A1 - Composition for consolidating dust-releasing surfaces - Google Patents

Abstract

This invention relates to the mining industry. The purpose of the invention is to increase the efficiency of consolidation by creating a crust of hardened foam on the surface to be treated. The composition contains the following ingredients, wt.% Carbamide-formaldehyde resin 15-30, foam former PO-1 3-4, phosphoric acid 3-4, water the rest. The foaming agent is used as a surfactant, it combines well with the resin, allows the composition based on the latter to be air-mechanically foamed. Orthophosphoric acid is used as an inorganic acid, it promotes the formation of a stable foam and provides hardening of the foamed composition. The foamed composition is obtained directly under field conditions and applied: it is layered on the relief with a thickness of 2-3 cm. This layer hardens -. The coating is weather resistant, not destroyed by wind, low and high, t-p and prevents dusting of tailings. i SL

Description

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The invention relates to the mining industry and can be used in fixing the drinking surfaces of tailing ponds, dikes and rock dumps.

The aim of the invention is to increase the efficiency of fixing by creating a crust of hardened foam on the surface to be treated.

The foamed composition is applied in a layer thickness of 2-3 cm.

KF-MT, a carbamide-formaldehyde resin, is a polymer that is capable of curing in the presence of acidic catalysts. It comes in the form of a 66% aqueous slurry, is fire and explosion safe, operating temperatures from

-10 to, has a wide production base.

PO-1, a non-isogenic surfactant that combines well with a carbamide-formaldehyde resin, allows the composition of the latter to be air-mechanically foamed.

Phosphoric acid promotes the formation of a sufficiently stable foam and provides hardening of the foamed composition.

The treatment of the spiked areas with the foamed fast-hardening composition allows, by increasing the viscosity and at the same time sufficient ductility and preserving the good cushioning properties of the composition, to eliminate the dependence of the effectiveness of the coating on the uniformity and depth of penetration of the fixative into the surface layer, since when applying the foam it adheres well to surfaces, repetition of relief, and fixed, quickly solidified. The presence of open pores in the foam layer improves the water and air permeability and moisture capacity, saves the fixer, ensuring a sufficient thickness of the coating.

Example. Surface treatment of tailings and overburden

rocks placed in a metal pallet, p 200 cm, with an average layer of 20 cm. The material was rammed and artificially created a hilly surface with a slope in one place up to 60

The foamed composition was prepared according to the technology of producing carbon / bamide foams. For this in

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PO-1 aqueous solutions and KF-MT resins were mixed with a stirrer at a speed of about 2500 rpm, foam was beaten up, an acid solution was added to it at the outlet, and a foam composition was fed through a flexible hose to the material surface in the pan until a layer of foam was formed, 2-3 cm. After 2 h, samples of the formed coating of hardened foam were taken, placed on counterparts in the freezer and heat chamber. Samples were subjected to 5-fold freezing before and thawing, as well as 5-fold heating to 60 ° C. The state of the surface was visually recorded.

Next, the samples were tested for water-erosion resistance, for which they were exposed to water droplets F5.5 mm, intensity 120 mm for 2 hours.

After testing for water erosion resistance, the samples were dried to an air-dry state, weighed and placed in an aerodynamic stand for blowing air flow at a speed of 15 m / s for 7 hours.

At the same time, samples of the coating obtained by treating the surface with a foamed composition containing KF-MT resin 15-30 mass%, PO-1 3-4 mass%, HjPO. 3-4 wt.%, Water - the rest, did not undergo any damage.

The foam composition can be obtained directly in the field and applied to the surface of any terrain, without prior planning of the surface.

The foam layer formed on the surface hardens for 3-5 minutes. At the same time, the coating of hardened foam is weatherproof, does not collapse under the influence of wind, precipitation, low () and high (+ 60 ° C) temperatures, and reliably prevents dusting of tailings from BpaijaeT.

Formula, inventions

A formulation for fixing the dusting surfaces, including a carbamide formaldehyde resin, a surfactant, an inorganic acid, and water that distinguishes 313,58364

so that, in order to increase the ortho-phosphorus ki, the slot at the next

fastening efficiency by creating a ratio of ingredients, wt.%:

VIA on the treated surface Carbamide-formal cork of hardened foam, it contains dehydrated resin 15-30

Lives as surface-active PU-1 3-4 foaming agent

the substance of the foaming agent PO-1, and Ortoforna acid ;. 3-4

as inorganic acid - WaterOther

Claims (1)

Claim The composition for fixing dusty surfaces, including urea-formaldehyde resin, a surfactant, inorganic acid and water, characterized in that in order to increase the efficiency of fixing by creating a hardened foam peel on the treated surface, it contains as a surface-active foaming agent PO-1, and as an inorganic acid orthophosphoric acid with a ratio of ingredients, urea-formaldehyde resin foaming agent PO-1 Orthophosphoric acid that Water of the following wt.%: 15-30 3-4 3-4 Rest