The main reasons for fine sand loss include:

• Excessive proportion of fine sand

  An excessive proportion of fine sand will reduce the efficiency of the fine sand recovery equipment, because too much fine sand may clog the screen or affect the working efficiency of the equipment.

• Improper selection of fine sand recovery equipment

  There are many types of fine sand recovery equipment on the market, and the equipment from each manufacturer has its own characteristics. In order to effectively recover fine sand, it is necessary to select equipment suitable for the characteristics of the raw materials, and ensure that the manufacturer adjusts the screen aperture and vibration frequency properly. Generally speaking, the screen aperture should be controlled at about 200 mesh.

• Improper moisture control

  Excessive moisture will make the manufactured sand cleaner, but it will also wash away a large amount of sand, resulting in serious loss of sand and gravel materials. Therefore, it is necessary to reasonably control the moisture to achieve the effect of cleaning the sand and gravel, while reducing the loss of fine sand.

In response to these problems, the following measures can be taken:

• Control from the source

  When selecting raw materials, avoid using materials with too high fine sand content. During the production process, try to control the size of the powder and adjust the screen aperture to reduce the generation of fine sand.

• Selection of fine sand recovery equipment

  When selecting fine sand recovery equipment, it should be selected according to the production process and needs. Do not choose unsuitable equipment to avoid waste of manufactured sand.

• Use of sedimentation tanks

  Factories with suitable conditions can discharge the treated wastewater into sedimentation tanks, and then carry out secondary recovery of fine sand from the sedimentation tanks to improve the recovery rate of fine sand.

• Reasonable control of water volume

  Reasonably control the amount of water to achieve the effect of cleaning sand and gravel, and also ensure that fine sand is not excessively lost. By adjusting the amount of water, the loss of fine sand can be effectively reduced and production efficiency improved.