SU1355729A1 - Composition for suppression of fine dust - Google Patents

Abstract

The invention relates to the mining and metallurgical industries. The purpose of the invention is to increase the efficiency of pressure reduction. The composition contains saponified tap pitch as a wetting agent in the following ratio of components, mA s.%: Rich tall pitch 0.0005 - 0.1; water - the rest. Tall pitch is the bottoms from the rectification of tall oil. Due to the introduction of tall oil pitch, electric field strength is generated, under the action of which fine dust particles are attracted and stick to the surface of the liquid. Water works as an electrostatic precipitator. After the dust adheres to the surface of the liquid, their wetting begins. The composition is prepared by adding tall pitch to water, then the resulting mixture is boiled until the pitch is completely dissolved, and then stirred and cooled. 1 tab. Q (L oo ate O1

Description

The invention relates to the mining and metallurgical industries and can be used to combat dust.

The purpose of the invention is to increase the efficiency of pressure reduction.

When introduced into water, saponified tall oil pitch dissociates into polar molecules of saponified fatty acids and potential-determining ions of calcium or sodium salts of free fatty acids. Due to the dipole moments and the ionic strength of the solution, a tension of the electric field occurs, under the action of which fine particles of the drug attract and stick. Water works as an electrostatic precipitator. After sticking to the surface of the liquid, their wetting begins.

The maximum concentration of polar molecules of saponified fatty acids and the potential-determining calcium ions or sodium salts of free fatty acids in water, according to the molecular solubility equation, is achieved at a concentration of saponified tall oil pitch in water equal to 0.0005-0.1%.

When the concentration of tall oil pitch is below 0.0005%, water does not reach the polar molecules and potential-determining ions, and above 0.1% there is an intense formation of electrically neutral

liquids hydrated crystals I

Tall pitch is produced in bulk, as a by-product of pulp and paper industry,

Tall pitch is bottoms from tall oil rectification. Group composition of tall oil pitch,%: non-saponified substances 33; oxidized substances 1,4; resin acids 12; fatty acids 39; This is a dark, viscous liquid with a blue tint; it softens to a liquid at a temperature of 25 ° C. The tall pitch is fire- and explosion-proof, non-toxic, and does not irritate the skin and mucous membranes. Concentrated tall oil pitch is not soluble in water; Tall oil pitch is pre-treated with a solution of caustic soda,

Thus, the introduction to the composition of the suppression of finely dispersed soaring dust as a pressure agent for the saponified tall oil pitch allows to increase the efficiency

reduce pressure and thereby improve working conditions in the mining and processing of lead ores.

The proposed composition for drinking is prepared as follows.

10 g of tall oil pitch and 0.5 g of sodium hydroxide are added per liter. The resulting mixture was boiled for 15 minutes. After dissolving tall oil pitch and cooling the resulting solution, the latter was quantitatively adjusted to 1 l with water. After mixing, a solution of tall pitch (1.0%) is prepared for the preparation of the proposed composition for suppressing finely dispersed vitamins in any ratio with water within the suggested concentration range.

Purification of air from the fine soaring slice was carried out in identical

conditions in a bubble pseudulator with known and proposed formulations at various concentrations. The cooled air was divided into two equal flows, one of which was previously passed through the test solution. The residual dust content of r was determined from the fluxes on the AFA-VP filters, and the air was cleaned from a finely dispersed, silicon-hazardous lead ore train with known and proposed formulas for subduing. I

The table shows the results.

experiments on the determination of residual dust content on the outgoing jet of a bubbling underrunner with known and proposed compositions.

55

O 7.3 7.3 1.0 0.0001 7.3 7.3 1.0 0.0005 7.1 2.7 2.6

Table continuation

From the table it follows that the proposed composition for dust suppression of finely dispersed soaring dust is more effective than the known one and, under optimal conditions, reduces the dust content on the outgoing jet of a bubbling dust collector compared to the prototype from 5.6 to 2.0 mg / m (in 2.8 times), which improves the working conditions of miners and eliminates the incidence of

SILICOSIS

The lower Boundary value was chosen to have a saponified tar pitch concentration of 0.0005%, since its reduction does not provide for a further decrease in dust content. The upper limit value of the concentration of saponified tall oil pitch was chosen to be 0.1%, since its increase does not give a further decrease in dustiness,

Effective dust reduction is provided only within the proposed range by the concentration of rich tall pitch (0.0005-1.0%).

Example 1 (prototype). The air was cleaned from a silicose-hazardous lead lead drink in a bubbling dust collector with a composition containing May.%

A mixture of primary alcohols mono - and dialkyl phosphates Water

0,0001-0,5 Else

0

five

0

five

0 35

0 45

0

55

This made it possible to reduce the dust content in comparison with water from 7.3 to 5.7 mg / m (2.3 times).

1.1. The air was cleaned with a composition containing, by weight,%:

A mixture of primary alcohols, acidic, mono- and disalkylphosphates 0.0001 WaterEvalue

No decrease was observed

1.2. The air was cleaned with a composition containing, in wt.%:

A mixture of primary alcohols, acidic mono - and dialkyl phosphate 0,0005 WaterEval

This made it possible to reduce the dust content from 7.3 to 7.1 mg / m.

1.3Air was purified with a composition containing, by weight,%:

A mixture of primary alcohols of acidic mono- and dialkylphosphates0, 001 Water Else This made it possible to reduce the dust content from 7.3 to 5.6 mg / m.

1.4The air was cleaned with a composition containing, in wt.%:

A mixture of primary alcohols of acidic mono- and dialkylphosphates0, 01 WaterEval

This made it possible to reduce the dust content from 7.3 to 6.0 mg / m.

1.5The air was cleaned with a composition containing, in wt.%:

A mixture of primary alcohols of acidic mono- and dialkyl phosphates 0, 05 Water Else This allowed to reduce the strength from 7.3 to 6.8 mg / m.

1.6The air was purified with the composition containing, in wt.%:

A mixture of primary alcohols, acidic mono- and dialkylphosphates, 1, 1 WaterEval

1.7Air purged with a composition containing, in wt.%:

A mixture of primary alcohols of acidic mono- and dialkyl-phosphates 0, j5

WaterEverything

This reduced the dust content from 7.3 to 5.9 mg / m.

Example 2, Purifying Air: .and from silicic lead dust in a bubble-dust collector with a composition containing, by weight,%: Washed tall oil pitch 0.0001-0.5

WaterEverything

This has reduced the dust content compared with the prototype from 5.6 - 7.3 to 2.0 - 7.0 mg / m.

2.1The air was cleaned with a composition containing, by weight,%:

Washed tall tillage 0.0001

Water Rest

This made it possible to reduce dustiness compared with npoTOTHno k from 7.3 to 7.0 mg / m (only 1.0 times).

2.2The air was cleaned with a composition containing, in wt.%:

Oily Tall Peck0.005

WaterEverything

This allowed to reduce dustiness compared with the prototype from 7.1 to 2.7 mg / m (2.6 times),

. 2,3, Air was purified with a composition containing, in wt.%: Washed tall oil pitch0.005

WaterEverything

This allowed to reduce dustiness compared with the prototype with, 6 to 2.0 mg / m (2.8 times).

2.4, Air was purified with a composition that closes the r c,% t

Editor A, Revin

Compiled by And, Fed eva Techred LoLinik

Order 5758/30 Circulation 429 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab, 4/5

Production and printing company, Uzhgorod, Proektna str., 4.

Washed tall tac0,01

Water, Rest This allowed to reduce the dust content compared with the prototype from 6.0 to 2.5 mg / m (2.4 times),

2.5, Air was purified with a composition containing, by weight,%:

Battered tall

pek0.05

WaterEverything

This reduced the dust compared to the prototype with

6.8 to 2.6 mg / m (2.6 times).

2.6, Air was purified with a composition containing, by weight,%:

Washed tall pec0,1

WaterEverything

This has reduced the dust content compared with the prototype from 6.2 to 2.8 mg / m (2.2 times).

2.7, Air was purified with a composition containing, in wt.%:

Washed tall pek0,5

WaterEverything

That allowed to reduce the dust content in comparison with the prototype from 5.9 to 5.2 mg / m (only 1.1 times).

Claims (1)

Invention Formula A composition for suppressing finely divided dust, including a wetting agent and water, characterized in that, in order to increase the effectiveness of dust suppression, it contains saponified tall oil pitch as a wetting agent in the following ratio of components, May,%: Battered tall peck0,0005-0,1 WaterEverything Proofreader M, Maksimishinets