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How to reuse cast steel grits

2020-01-09 10:14:43   Review:0 Click:
  The hardness of cast steel grits is strong, the crushing rate in use is low, it can reduce the amount of dust and solid waste in the process, and it can be recycled, so it has good environmental protection effect. However, long-term recycling is easy to cause self pollution of cast steel grits, and then lead to secondary pollution of steel surface after sandblasting. To solve this problem, it is necessary to improve the standard of pre-treatment before sandblasting. The following methods can improve the cleaning effect of steel plate surface before sandblasting.

  The impurities in G50 Cast Steel Grits can be divided into solid impurities and soluble salts. Different treatment methods should be adopted for the two kinds of objects.

  1、 Solid impurities are self-cleaning by means of clear air. In the recycling cycle, cast steel grits can be recycled by the automatic sand suction separator, so that most of the large impurities and more than one third of the dust can be removed, and the solid impurities can be removed in the process of entering the sand storage hopper through the abrasive screen.

  2、 The soluble salt in the cast steel grits can be removed by regular water cleaning. Meanwhile, it can be used in rotation between different cast steel grits in the recycling.

  Raise the water pressure to 1500bar for cleaning, so as to improve the cleaning effect of steel plate surface before sandblasting. When the water pressure is increased to 1500bar, about 60% - 80% of the rust and thick paint coating on the steel plate surface can be removed, and the soluble salt that may be contaminated on the steel plate surface can be basically removed.

  The method of adding pre sandblasting before main sandblasting can adopt the process of conventional 350bar high-pressure water cleaning plus pre sandblasting plus conventional 350bar high-pressure water cleaning. One pre blasting can remove more than 95% of the rust and thick paint coating, and two conventional high-pressure water washing can remove the soluble salt.

  Cast steel grits recycling can maximize its use value. As long as we master how to remove the impurities, we can save costs and bring more benefits for enterprises.

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