We present the articles of the first issue of scientific journal "Mining Science and Technologyβ (Russia) for 2025:
Scientists have determined how relative air humidity affects the size of hygroscopic salt dust aerosols β a key factor in addressing ventilation challenges in potash mines. With the expansion of mining operations, the issue of fresh air shortages in mines has become critical. Traditional ventilation methods are no longer sufficient, giving way to recirculation and "ventilation on demand" systems. However, their effective operation requires a precise understanding of how salt dust behaves in a humid atmosphere. When rock is fractured, it generates NaCl and KCl aerosols, which absorb moisture, increase in size, and settle. Accurate models are needed to predict their dispersion. Researchers studied the mechanisms of hygroscopic growth, hysteresis, deliquescence, and recrystallization of salt particles. Due to the challenges of conducting experiments in mines, data on oceanic aerosols of the same composition were used. These models were adapted to mine conditions, yielding average values for the hygroscopic growth factor of salt dust. Remarkably, the particle growth dynamics in mines and over the ocean were found to be very similar! To predict changes in aerosol size, Young's model was proposed, which effectively describes the process in log-log coordinates. These findings will help improve dust condition calculations in salt and potash mines, enhancing ventilation systems and miner safety.
For more information, see the article:
π Chernyi K.A., Faynburg G.Z. Evaluation of variation of salt dust hygroscopic aerosol particle size as a function of relative air humidity. Mining Science and Technology (Russia). 2025;10(1):34-44. https://doi.org/10.17073/2500-0632-2024-07-283
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π t.iss.one/MinSciTech π
#InEnglish #MST #halite #sylvine #sylvinite #potashmine #saltdust #aerosolparticles #sizedistribution #hygroscopicgrowthfactor #ventilation #safety #atmosphere #dissolution #crystallization #model #humidity #NaCl #KCl #mining #particles #growth #diameter #theory #experiment #research #science #technology #dust #air #water #surface #process #data #analysis #study #results #YoungModel #speleotherapy #minerals #physics #chemistry #engineering #environment #health
Scientists have determined how relative air humidity affects the size of hygroscopic salt dust aerosols β a key factor in addressing ventilation challenges in potash mines. With the expansion of mining operations, the issue of fresh air shortages in mines has become critical. Traditional ventilation methods are no longer sufficient, giving way to recirculation and "ventilation on demand" systems. However, their effective operation requires a precise understanding of how salt dust behaves in a humid atmosphere. When rock is fractured, it generates NaCl and KCl aerosols, which absorb moisture, increase in size, and settle. Accurate models are needed to predict their dispersion. Researchers studied the mechanisms of hygroscopic growth, hysteresis, deliquescence, and recrystallization of salt particles. Due to the challenges of conducting experiments in mines, data on oceanic aerosols of the same composition were used. These models were adapted to mine conditions, yielding average values for the hygroscopic growth factor of salt dust. Remarkably, the particle growth dynamics in mines and over the ocean were found to be very similar! To predict changes in aerosol size, Young's model was proposed, which effectively describes the process in log-log coordinates. These findings will help improve dust condition calculations in salt and potash mines, enhancing ventilation systems and miner safety.
For more information, see the article:
π Chernyi K.A., Faynburg G.Z. Evaluation of variation of salt dust hygroscopic aerosol particle size as a function of relative air humidity. Mining Science and Technology (Russia). 2025;10(1):34-44. https://doi.org/10.17073/2500-0632-2024-07-283
Subscribe to our Telegram channel:
π t.iss.one/MinSciTech π
#InEnglish #MST #halite #sylvine #sylvinite #potashmine #saltdust #aerosolparticles #sizedistribution #hygroscopicgrowthfactor #ventilation #safety #atmosphere #dissolution #crystallization #model #humidity #NaCl #KCl #mining #particles #growth #diameter #theory #experiment #research #science #technology #dust #air #water #surface #process #data #analysis #study #results #YoungModel #speleotherapy #minerals #physics #chemistry #engineering #environment #health
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π Dry vs wet: unexpected results for Arkachan gold ore
Comparison Methods:
βοΈ Dry Processing: Crushing (DKD-300) + Grinding (TsMVU-800) + Pneumatic Separation (POS-2000)
βοΈ Wet Processing: Gravity Separation with GRG Test (ITOMAK-0.1)
π Key Data:
Gold Distribution:
βοΈ 27.35% in -0.2+0.1 mm class;
βοΈ 11.75% in -0.1+0.071 mm class;
βοΈ 23.46% in -0.071 mm class;
β Total 62.56% in particles <0.2 mm
Method Efficiency:
βοΈ pneumatic Separation: 35.25% recovery at 1.8 t/h;
βοΈ GRG Test: 73.91% recovery with grinding to 80% passing 0.071 mm.
GRG Test Results by Stage:
βοΈ Stage 1 (-1 mm): 40.20% recovery;
βοΈ Stage 2 (-0.315 mm): +14.46%;
βοΈ Stage 3 (-0.071 mm): +20.88%.
Conclusions:
1. Dry methods are ineffective for fine-grained gold (<100 Β΅m).
2. Gravity separation requires fine grinding but achieves high recovery.
3. Major losses are due to incomplete liberation of gold in pyrite.
π Full Article:
Matveev Π.I., Lebedev I.F., Vinokurov V.R., Lvov E.S. Comparative processing studies of the Arkachan deposit gold-bearing ores using dry separation and classical wet gravity separation methods. Mining Science and Technology (Russia). 2024;9(2):158-169. https://doi.org/10.17073/2500-0632-2023-10-168
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π¬ What modern methods could improve dry processing for such ores?
#InEnglish #MST #Mining #Gold #Beneficiation #Crusher #Mill #Separator #DryProcessing #ParticleSize #Pyrite #Sample #Ore #Test #Method #Analysis #Stage #Class #Gravity #FineGrained #Particles #Concentrate #Grinding #Efficiency #Crushing #Recovery #Flowchart #Cycle #Fraction #Balance #Parameter #Mode #Degree #Impact #Abrasion #Subsample #Sludge #Pulp #SizeFraction #Feed #Tailings #Losses #Product #Intergrowths
P.S. For ores with fine-grained gold, classical gravity remains optimal. Are there alternatives?
Comparison Methods:
βοΈ Dry Processing: Crushing (DKD-300) + Grinding (TsMVU-800) + Pneumatic Separation (POS-2000)
βοΈ Wet Processing: Gravity Separation with GRG Test (ITOMAK-0.1)
π Key Data:
Gold Distribution:
βοΈ 27.35% in -0.2+0.1 mm class;
βοΈ 11.75% in -0.1+0.071 mm class;
βοΈ 23.46% in -0.071 mm class;
β Total 62.56% in particles <0.2 mm
Method Efficiency:
βοΈ pneumatic Separation: 35.25% recovery at 1.8 t/h;
βοΈ GRG Test: 73.91% recovery with grinding to 80% passing 0.071 mm.
GRG Test Results by Stage:
βοΈ Stage 1 (-1 mm): 40.20% recovery;
βοΈ Stage 2 (-0.315 mm): +14.46%;
βοΈ Stage 3 (-0.071 mm): +20.88%.
Conclusions:
1. Dry methods are ineffective for fine-grained gold (<100 Β΅m).
2. Gravity separation requires fine grinding but achieves high recovery.
3. Major losses are due to incomplete liberation of gold in pyrite.
π Full Article:
Matveev Π.I., Lebedev I.F., Vinokurov V.R., Lvov E.S. Comparative processing studies of the Arkachan deposit gold-bearing ores using dry separation and classical wet gravity separation methods. Mining Science and Technology (Russia). 2024;9(2):158-169. https://doi.org/10.17073/2500-0632-2023-10-168
π Subscribe: @MinSciTech
π¬ What modern methods could improve dry processing for such ores?
#InEnglish #MST #Mining #Gold #Beneficiation #Crusher #Mill #Separator #DryProcessing #ParticleSize #Pyrite #Sample #Ore #Test #Method #Analysis #Stage #Class #Gravity #FineGrained #Particles #Concentrate #Grinding #Efficiency #Crushing #Recovery #Flowchart #Cycle #Fraction #Balance #Parameter #Mode #Degree #Impact #Abrasion #Subsample #Sludge #Pulp #SizeFraction #Feed #Tailings #Losses #Product #Intergrowths
P.S. For ores with fine-grained gold, classical gravity remains optimal. Are there alternatives?
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