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Composite dust suppressant as well as preparation method and application thereof

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 cannot meet the requirements of use, dust suppressant is difficult to achieve dust suppression effect, 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: 2021-10-19
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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  • Composite dust suppressant as well as preparation method and application thereof
  • Composite dust suppressant as well as preparation method and application thereof
  • Composite dust suppressant as well as preparation method and application thereof

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preparation example Construction

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

[0033] Mix halides, strong electrolytes, non-cationic water-soluble polymers, non-cationic surfactants, chelating agents, water and NaOH to obtain a mixed solution, mix the mixed solution with residual oil and disperse to obtain a residual oil emulsion ;

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

[0035] In the present invention, halides, strong electrolytes, non-cationic water-soluble polymers, non-cationic surfactants, chelating agents, water and NaOH are mixed to obtain a mixed liquid. In the present invention, the mixing temperature is preferably 70 to 75°C, more preferably 75°C. In the present invention, after heating the water to the mixing temperature, the halides, strong electrolytes, non-cationic water-soluble pol...

Embodiment 1

[0043] According to Table 1, the residue oil, SDBS and water of corresponding quality were weighed and mixed uniformly at 75° C. to obtain residue oil emulsion samples 1-1 to 1-5 in sequence. Use the JZYW-200B micro-controlled automatic interfacial tensiometer to measure the surface tension of all samples, measure each sample three times, read the three measurement values, add the three measurement values ​​and take the average value, and the average value is the final value of the sample surface tension value. See Table 1 for the surface tension of samples 1-1 to 1-5.

[0044] Table 1 Surface tension of residual oil emulsion

[0045]

[0046]

[0047] As shown in Table 2, weigh the residual oil, SDBS, water and gelatinized starch of corresponding quality, mix them evenly at 75°C, and obtain samples 1-6 to 1-10 in sequence. Use the JZYW-200B micro-controlled automatic interfacial tensiometer to measure the surface tension of all samples, measure each sample three times...

Embodiment 2

[0056]As shown in Table 4, the components with corresponding masses were weighed and mixed uniformly at 70° C. to obtain samples 2-1 to 2-4 in sequence. Weigh the plastic cup containing 100g sample on an analytical balance, then place the plastic cup in a ventilated place with a window to dry for 10 hours at a temperature of 23-28°C, after 10 hours, weigh the dried sample on an analytical balance. The water evaporation was calculated by the quality difference of the samples before and after drying. According to the amount of water evaporation, the anti-evaporation performance of various hygroscopic materials is compared. See Table 4 for the water evaporation of samples 2-1 to 2-4.

[0057] The water evaporation of table 4 residual oil emulsion

[0058]

[0059] As shown in Table 5, the components with corresponding masses were weighed and mixed uniformly at 70° C. to obtain samples 2-5 to 2-8 in sequence. Weigh the plastic cup containing 100g sample on an analytical bala...

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Abstract

The invention relates to the technical field of dust suppressants, and provides a composite dust suppressant. According to the composite dust suppressant provided by the invention, the evaporation resistance of the composite dust suppressant is improved by adding the residual oil, the gelatinized starch and the non-cationic water-soluble polymer; through multiple cooperation of the strong electrolyte, the non-cationic water-soluble polymer, the non-cationic surface active agent and the chelating agent, the surface tension of the dust suppressant is reduced to about half of that of water, so that the dust suppressant has excellent wettability to dust; by adding halide, the freezing resistance of the dust suppressant is improved, and the dust suppressant cannot be frozen at the temperature of -26.6 DEG C to-20.3 DEG C. The composite dust suppressant obtained by the invention has a good dust suppression effect, and can effectively reduce the dust concentration in the open pit coal mine.

Description

technical field [0001] The invention relates to the technical field of dust suppressants, in particular to a composite dust suppressant and its preparation method and application. Background technique [0002] In recent years, with the acceleration of urbanization, the dust in construction stockyards and roads is also increasing; the increase in mine production intensity and the improvement of mechanization level have increased the dust pollution of production operations; in addition, in some areas Drought and strong winds often cause sandstorms, 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 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. W...

Claims

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Application Information

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Patent Type & Authority Applications(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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