Home > Projects > Huaihua Mingda Construction Material Co., Ltd. - Application of SOUTH V7-100 Dry-type Sand Making Equipment
Huaihua Mingda Construction Material Co., Ltd. - Application of SOUTH V7-100 Dry-type Sand Making Equipment
Huaihua Minda Construction Material Co., Ltd. (hereinafter referred to as “Mingda Construction Material”) occupies an area of 45mu and loaes in the industry park of Zhongfang County, Huaihua with the environment high-quality machine-made sand production line completed in 2015. With the high-efficient and environmental-friendly industry as the development objective, Mingda Construction Material adopts the environmental-friendly complete V7 dry-type machine-made equipment of SOUTH to produce the high-quality competitive machine-made sand. Due to the advantages such as the continuous grading, rounded particle shape and controllable powder content and the like, the machine-made sand quality surpasses that of the ordinary river sand and will drive the quality improvement of the sand used in the intra-industry construction, having a great significance in improving the domestic engineering quality, protecting ecological environment and leading quality benign development of the sand making market.

The complete SOUTH V7 dry-type sand making equipment operates stably and achieves the expectant ideal effects, which is reflected specifically in the following aspects: V7 makes the fineness modulus of the machine-made sand can be adjusted automatically; the powder content can be freely controlled according to the adaptive needs within 10%; the particle grading is continuous and the fineness modulus is quite stable; the sand particle shape of the finished product is good, as good as that of the river sand, and even has a greater advantage than the river sand. The dust treatment effect of the equipment during the production is good with zero dust release and good environment and without the need of external sealing, achieving the environmental-friendly production. The finished sand of Mingda Construction Material is mainly supplied to the mixing station, real estate construction site, high-speed rail and road construction, etc. at present. The client reflects that adopting the machine-made sand with such good quality to produce the cement and mortar (under the condition of basically same working performance) can reduce consumption of cement and the cementing materials such as the admixture and lower the production costs. In the meantime, the strength of the cement and mortar is improved to a certain extent.

When the grading curve surpasses Area 3 and inclines to the upper left, it represents that the sand is too fine and more cement mortar is needed during the concrete mixing and preparing, which makes easily the lowering of the concrete strength and increasing of the shrinkage; when the grading curve inclines to the lower right, it represents that the sand is too coarse and it is difficult to control the workability of the prepared concrete mixture and the internal friction increases, making the vibrated molding difficult. The sand of Area 2 grading has the moderate size and good grading and Area 2 is the most ideal grading area for making the concrete. The grading curve of Mingda Construction Material is limited within Area 2 and adopting the same cement to prepare the concrete will obtain a higher strength.

The high efficient and environmental friendly high-quality sand making equipment benefits from the unique four core technologies of SOUTH: US7 crusher, air screener, highly-integrated intelligent electrical control system and sand powder separation technology.

  • Vertical shaft impact crushing technology based on particle size control – US7 crusher

    Based on vertical shaft impact crusher, US7 crusher has unique design of high-density grinding area composed of throwing hammer and T-type ring washer, promoting the production of 0.15-0.6mm fine aggregates, guaranteeing the stable grading of finished products, and improving the crushing efficiency and effect of particle shape.

  • Air Screening Technology

    Based on the vibratory screening and combined the air separation technology, the air screener improves significantly the screening efficiency, integrating the three function of particle size adjusting, grading and screening. (The fineness modulus can be adjusted with the stability degree up to ±0.1.)

  • Sand Powder Separation Technology

    An interventional air screener of vibrating feeder is set right under the US7 vertical shaft impact crusher, and adopts a closed system. The internal air screener is in a negative pressure state to make working sequence integrated from crushing to grading, freely controlling the proportion of particles with 0.15mm below in finished sand within the range between 6% and 15%, and preventing the dust generation. The production line adopts the off-line ash-clearing pulse dust removal technology to remove the dust with small energy consumption and high efficiency. The dust discharging concentration is lower than 20mg/m3.

  • Highly-integrated intelligent electrical control system, adjusting automatically the operation to make the finished sand keep stable.

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