An experimental investigation on the effect of carboxymethyl cellulose on morphological characteristics of dust-suppression foam and its mechanism exploration

Xiang, Wei; Wang, Hetang; Xie, Ying; Du, Yunhe

doi:10.1016/j.psep.2019.12.009

Cited by 24 publications

(8 citation statements)

References 31 publications

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“…When the concentration of their combination was lower, the active groups interacted to reduce the surface tension and increase the foaming volume. However, as the concentration increases, the synergistic effect reaches equilibrium (Wei et al 2020), the surface tension no longer decreases and the foaming volume reaches a maximum. As the concentration increases further, the foam volume decreases due to the inhibitory effect of too many free radicals on the foam.…”

Section: Of Compounding Foaming Agent Monomermentioning

confidence: 99%

“…As shown in Fig. 1, the intersection of each bubble in the foam is de ned as the Plateau boundary (Wei et al 2020). Suppose the radius of the bubble is R, the pressure inside the bubble is p A , the pressure outside the bubble is p P , and the surface tension of the vacuolar membrane is σ.…”

Section: Mechanism Of Foam Formationmentioning

confidence: 99%

“…Although the above-mentioned dust suppression schemes which belong the former, such as air curtain and spray, can control dust pollution to a certain extent, there are some limitations in the eld application. On the one hand, the nozzles of gas water spray are often blocked because of the impurities in the water supply network (Wei et al 2020); On the other hand, the back and forth movement of the transport vehicles tends to make the air supply ducts leak (Li et al 2022). These factors often lead to ineffective solutions for external dust removal and still large amounts of mine dust entering the working environment.…”

Section: Introductionmentioning

confidence: 99%

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Study on the control of high ore pass dust pollution by pre-injection foam dedusting technology in the ore bin

Zeng

Jiang

Wang

2022

Environ Sci Pollut Res

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The impact air ow generated by ore unloading in the chute raises the dust carried by the ore itself and the oating dust and then the dust raised enters the roadway with the air ow and pollutes the environment. In order to minimize the amount of dust entering the roadway and reduce the pollution of unloading dust, we conducted an experimental study of selection of best foam formula and Pre-injection foam dust dedusting technology in ore bin. It was found that the optimal foaming formula was 1.0% SDBS + 0.5% SDS+(0.2%~0.4%)CMEA by the compound experiment using two evaluation criteria of initial foaming amount and foam defoaming rate. When the air pressure is 0.7MPa, the foaming rate of the foam generator is proportional to the gas and liquid ow rate and the best foaming gas and liquid ow ratio is 27.8. Under this circumstance, the foaming rate of the foaming formula is 500 L/min. When the height of foam is controlled at 15 cm, the effect of foam dust removal is the best. The dust emission rate from the foam to the fourth level can reach 60% and the dust fall rate of the third level is 28%, which effectively reduces the dust production and relieves the pressure of the spray hole dust fall at the wellhead.

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Section: Of Compounding Foaming Agent Monomermentioning

confidence: 99%

Section: Mechanism Of Foam Formationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Study on the control of high ore pass dust pollution by pre-injection foam dedusting technology in the ore bin

Zeng

Jiang

Wang

2022

Environ Sci Pollut Res

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“…Firstly, synergistic foam stabilizers enhance the interaction between surface adsorption molecules through synergistic action [ 9 ], making the foam film more elastic and less permeable, thus improving foam stability. Secondly, viscosity-increasing foam stabilizers increase the viscosity of the liquid phase to reduce the discharge rate of foam and prolong the half-life [ 10 ], thus improving foam stability. The third category is the solid particle–type stabilizer [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

The Stabilizing Effect of Carboxymethyl Cellulose on Foamed Concrete

Sun

2022

IJMS

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Foam concrete is widely used for its excellent properties, such as light weight, heat insulation, fire resistance, and sound insulation. The stability of foam is the main factor that affects the mechanical performance of foam concrete. The experiments are designed from two perspectives: the foam’s stability performance and the foam concrete’s modification effect. The effects on foam volume, foam half-life, foam bleeding rate, and foam pore size were investigated based on different concentrations of foam stabilizer CMC (0%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%). A combination of macroscopic testing and microscopic analysis, a comparative study of dry density, water absorption test, mechanical property test, and pore structure analysis were conducted after using the modified foam for foam concrete. It is shown that the addition of CMC has an enhanced effect on foam stability. Foaming volume, water secretion rate, and average pore size showed a decreasing trend with the increase of CMC admixture, while the foam half-life displayed an increasing trend. In addition, adding CMC reduces the dry density and improves water absorption and compressive strength. The pore structure development of foam concrete has a noticeable improvement effect, and the optimal amount of admixture is 0.4%. Research results provide a reference for applying thickening foam stabilizer CMC in foam concrete.

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“…Some progress has been made in the preparation of new materials for dust suppressant, but the preparation process is complicated, which requires the addition of polymer initiator and crosslinking agent to initiate the reaction. The wettability of water to material heap is poor, adding surfactant can improve its wettability effectively (Wei et al, 2020;Wang et al, 2018). However, due to secondary pollution and degradation problems, some usage occasions are limited (Dixon-Hardy et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Preparation and optimization of the environmental dust suppressant with agricultural waste straw

Liang

Zhang

Chi

et al. 2021

Environ Sci Pollut Res

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In order to reduce the dust pollution caused by the coal mining process, an environmental dust suppressant was synthesized by corn straw, sodium carboxymethyl cellulose (CMC) and additives. This study focused on the preparation conditions of this dust suppressant and the viscosity, surface tension, hardness, sedimentation time, contact angle, wind erosion resistance, and water retention capacity of the dust suppressant were investigated systematically. Response surface method was used to optimize the raw material formulation and preparation parameters. The optimum mass ratio of straw, CMC and alkali of the dust suppression was 65:20:15 (m/m), which was prepared under the conditions of the reaction time being 1.5 h, and the rotation speed being 300 r/min. The surface tension decreased from 72 mN/m to less than 50 mN/m with the addition of the additives. The prepared dust suppressant has a maximum viscosity of 363.6 mPa•s, the compressive strength could be up to 200 kPa. The wind erosion resistance of dust suppressant was signi cant, which could be up to 99 % at the wind speed of 14 m/s for 6 h. After spraying the dust suppressant, the gap between particles was lled with dust suppressant, and the adjacent particles were bound by strong mechanical action.

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An experimental investigation on the effect of carboxymethyl cellulose on morphological characteristics of dust-suppression foam and its mechanism exploration

Cited by 24 publications

References 31 publications

Study on the control of high ore pass dust pollution by pre-injection foam dedusting technology in the ore bin

Study on the control of high ore pass dust pollution by pre-injection foam dedusting technology in the ore bin

The Stabilizing Effect of Carboxymethyl Cellulose on Foamed Concrete

Preparation and optimization of the environmental dust suppressant with agricultural waste straw

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