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A kind of composite dust suppressant and its preparation method and application

A technology of dust suppressant and chelating agent, which is applied in the field of composite dust suppressant and its preparation, which can solve the problem that dust suppressant is difficult to achieve dust suppression effect, dust suppressant cannot meet the use requirements, strong hydrophobicity is not easy to be wetted by water, etc. Problems, to achieve the effect of not easy to lose quickly, improve viscosity, and reduce water loss

Active Publication Date: 2022-05-27
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the performance of traditional dust suppressants is relatively single, and only has advantages in one aspect, such as: some dust suppressants have excellent anti-evaporation performance, but their antifreeze and wettability are poor
With the increasing complexity of today's dust pollution problems, dust suppressants with single performance can no longer meet the requirements of use
Especially in open-pit coal mines, the dust particles are small, strong hydrophobicity and difficult to be wetted by water, coupled with the differences in natural conditions in different geographical locations, it is difficult to achieve the ideal dust suppression effect with a single-performance dust suppressant

Method used

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  • A kind of composite dust suppressant and its preparation method and application
  • A kind of composite dust suppressant and its preparation method and application
  • A kind of composite dust suppressant and its preparation method and application

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preparation example Construction

[0032] The present invention also provides a preparation method for the preparation method of the composite dust suppressant described in the above scheme, comprising the following steps:

[0033] Mix halide, strong electrolyte, non-cationic water-soluble polymer, non-cationic surfactant, chelating agent, water and NaOH to obtain a mixed solution, mix the mixed solution and residual oil and disperse to obtain residual oil emulsion ;

[0034] The gelatinized starch and residual oil emulsion are mixed to obtain a composite dust suppressant.

[0035] In the present invention, halide, strong electrolyte, non-cationic water-soluble polymer, non-cationic surfactant, chelating agent, water and NaOH are mixed to obtain a mixed solution. In the present invention, the mixing temperature is preferably 70 to 75°C, and more preferably 75°C. In the present invention, preferably, after heating the water to the mixing temperature, the halide, the strong electrolyte, the non-cationic water-s...

Embodiment 1

[0043] As shown in Table 1, the corresponding mass of residual oil, SDBS and water were weighed and mixed uniformly at 75° C. to obtain residual oil emulsion samples 1-1 to 1-5 in turn. JZYW-200B micro-controlled automatic interfacial tension meter was used to measure the surface tension of all samples, each sample was measured three times, three measured values ​​were read, and the three measured values ​​were added to take the average value. The average value is the final sample value. surface tension value. The surface tensions of samples 1-1 to 1-5 are shown in Table 1.

[0044] Table 1 Surface Tension of Residual Oil Emulsion

[0045]

[0046]

[0047] As shown in Table 2, the corresponding mass of residual oil, SDBS, water and gelatinized starch were weighed and mixed uniformly at 75°C to obtain samples 1-6 to 1-10 in turn. JZYW-200B micro-controlled automatic interfacial tension meter was used to measure the surface tension of all samples, each sample was measur...

Embodiment 2

[0056]As shown in Table 4, each component of corresponding mass was weighed and mixed uniformly at 70° C. to obtain samples 2-1 to 2-4 in turn. Weigh the plastic cup containing 100g of samples on the analytical balance, and then place the plastic cup in a ventilated place of the window to dry for 10 hours at a temperature of 23-28 °C. After 10 hours, the dry samples are weighed on the analytical balance. The water evaporation was calculated by the poor quality of the samples before and after drying. The evaporation resistance of various hygroscopic materials is compared according to the amount of water evaporated. Table 4 shows the water evaporation amounts of samples 2-1 to 2-4.

[0057] Table 4 Water Evaporation of Residual Oil Emulsion

[0058]

[0059] As shown in Table 5, each component of corresponding mass was weighed and mixed uniformly at 70°C to obtain samples 2-5 to 2-8 in turn. Weigh the plastic cup containing 100g of samples on the analytical balance, and th...

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Abstract

The invention relates to the technical field of dust suppressants and provides a composite dust suppressant. The composite dust suppressant provided by the present invention improves the evaporation resistance of the composite dust suppressant by adding residual oil, gelatinized starch and non-cationic water-soluble polymer, and through strong electrolyte, non-cationic water-soluble polymer The multiple synergistic effects of substances, non-cationic surfactants and chelating agents reduce the surface tension of the dust suppressant to about half of that of water, and have excellent wettability for dust; by adding halides, the dust suppressant is improved Antifreeze performance, so that it will not freeze at a temperature of -26.6°C to -20.3°C. The composite dust suppression agent obtained by the invention has a good dust suppression effect and can effectively reduce the dust concentration in open-pit coal mines.

Description

technical field [0001] The invention relates to the technical field of dust suppressants, in particular to a composite dust suppressant and a preparation method and application thereof. Background technique [0002] In recent years, with the acceleration of the urbanization process, the dust of construction stockyards and road surfaces is also increasing; the increase of mine production intensity and the improvement of mechanization level have increased the dust pollution of production operations; Due to drought and strong winds, sandstorms often occur, and the dust in the atmosphere seriously affects traffic safety and human health. Therefore, the use of dust suppressants has become an important measure to improve dust pollution. [0003] However, the performance of traditional dust suppressants is relatively simple, and only has advantages in one aspect. For example, some dust suppressants have excellent anti-evaporation performance, but their antifreeze and wettability a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/22E21F5/06
CPCC09K3/22E21F5/06
Inventor 张江石任晓锋
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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