SU1355723A1 - Composition for preventing blowout of fine-particle materials - Google Patents

Abstract

The invention relates to mining and m. used in the storage and preservation of fine materials in the open air. The purpose of the invention is to improve the performance properties by increasing the moisture resistance and vibration resistance of the resulting coating. The composition contains the following components with their ratio, wt.%: Urea-formaldehyde resin (MFS) - 25-35; hardener 0.5-1.5; calcium chloride 10-20; water - the rest. A 10% orthophosphoric acid solution is used as a hardener. The optimal concentration of MFS in the solution is chosen taking into account the optimal wettability of the working solution. The composition is prepared by preparing a calcium chloride solution and a 10% hardener solution in separate containers. The MFS is then diluted in a calcium chloride solution in the supply tank. 20-30 minutes before the surface treatment begins, a hardener is added to the tank and the resulting composition is thoroughly mixed with a pump. The composition is sprayed on to the surface of fine materials by spray spray up to 5 atm. one . f-ly, 3 tab. (L with with SP ate to 00

Description

one

The invention relates to mining and can be used to prevent the loss of coal and other fine materials from blowing during transportation at a distance or during storage and preservation of them outdoors.

The purpose of the invention is to improve the operational properties of the composition due to the preventive composition given

higher moisture resistance and vibration resistance of the resulting coating.

As a hardener, it is advisable to use a 10% solution of phosphoric acid. The optimal concentration of urea formaldehyde resin (MFS) in the solution was chosen taking into account the optimal wettability of the working solution. The cost of the IFS of the mark KS is 160 rubles per ton. Salt chloris

In addition, calcium lowers the solidification temperature of the working solution to -22 ° C, which excludes the heating of the solution at negative temperatures during film formation. As the calcium chloride content in the solution increases, the water resistance of the curable film increases, but an increase in its content of more than 20 wt.% Leads to an increase in the viscosity of the solution, which complicates the technology of applying the solution to the surface of finely dispersed materials. A hardener (phosphoric acid) promotes the formation of a hard crust on the surface. Increasing its amount of more than 1.5% leads to curing of the solution in the supply tank.

. The proposed prophylactic composition was prepared as follows.

Calcium chloride solution and 10% hardener solution are prepared in separate containers. Orthophosphoric acid is used as a hardener. Then, the urea-formaldehyde resin in the feed tank is diluted with calcium chloride solution. And 20–30 minutes before the surface treatment begins, the prepared 10% hardener solution is added to the feed tank and the resulting composition is thoroughly mixed with a pump.

Subsequently, finely dispersed materials are applied to the surface.

1355723 samples, in particular coal, the composition obtained by spray spray under pressure up to 5 atm in the amount of 30 ji.

The loss of coal from the hull is determined by weighing the cars with coal at the point of shipment and point of unloading. Examples of formulations proposed

in table.1.

Table 2 shows the physicomechanical properties of the proposed prophylactic composition to prevent coal blowing and the composition chosen for the prototype.

Table 3 shows the loss of coal from blowing.

0

The data in Tables 2 and 3 are confirmed by a test report.

As can be seen from Table 2, the cost of prophylactic coverage of one gondola car is much lower, 5 than the known composition chosen for the prototype, and the loss of coal from the rail is almost completely absent.

Claims (2)

1. Preventive composition to prevent the blowing of fine materials, including urea formaldehyde resin, hardener and water, characterized in that, in order to improve the operational properties of the composition by increasing the moisture resistance and vibration resistance of the resulting coating, it additionally contains calcium chloride in the following the ratio of components, wt.% 1 Urea formaldehyde resin Hardener Chloride calcium Water 2. The composition according to u and and with those; It contains a 0% orthophosphoric acid solution. five 0 25-35 0.5-1.5 W-20 Else n, I distinguish - 1, that as a screwdriver 1355723 Table 1 Components Preventive composition to prevent the blowing of fine materials, wt.% Recipes rznzzrjzz Urea-formaldehyde resin (MFO) 253035 Calcium chloride 10 15 20 Hardener - orthophosphoric acid (10% solution) 0,51,01,5 Water64,55443,5 I Table2 Preventive composition for Indicators for the prevention of blowing fine materials Formulations 1 2 .3 Prototype Pour point с-22 -22 -22 -22 Consumption of preventive coating solution, kg / gondola Fire resistance, with burning. Vibration resistance,% destruction of the film + 20 ° C about - 20 С - 30 С - Cost of preventive covering of one gondola car (rub) 30 o ABOUT ABOUT 75 1H thirty Ltd,. 90 1.8-3.0 The preferred method 30 0.0 0.2 0.2 0.2 0.2 0.2 Prototype method 300.3 0.6 0.6 0.6 0.6 1355723 Table3