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ISSN 2063-5346
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Reuse the Grinding Sludge as an alternative Raw Material

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Prince Herald Milton , E. Sivasenthil
» doi: 10.48047/ecb/2023.12.si7.568

Abstract

The aim is to discover another viable raw material from the powdery grinding scraps or ground chips that are generated during the grinding of Mild Steel A36 Grade. These scraps are mixed with a coolant and discharged as sludge outside the grinding machines. A specially made filtering system is used to filter the sludge so that the coolant can be reused. The leftover sludge is usually disposed of by burying it in landfills. The water-based coolant produces a grinding sludge that can be compressed and appears as a wet powder containing 86.26% Iron (Fe) and 0.23% Silicon (SI). The goal is to transform this sludge into a useful Raw Material. To eliminate the Iron (Fe) particles, the wet samples are gathered and dried. Magnets are used for the elimination of Iron Fe particles from the dried dust of grinding sludge, where silicon impurities are segregated. The samples are subsequently rinsed several times with water to enhance the quality of the Iron (Fe) particles from the Grinding sludge. The dust oxy-fuel steel cutting torch utilizes temperatures ranging from 750 to 1500 C to enhance the hardness of the material. This is achieved by melting the separated Iron (Fe) Particles. As a result of the heating process, the oxygen in Fe2O3 is oxidized, and the dust is transformed into a solid irregular shape composed of pure solid Iron (Fe) particles. The dust oxy-fuel steel cutting torch makes use of a temperature range of 750 to 1500 C to enhance the hardness of the material. This is achieved by melting the Iron (Fe) Particles which are then separated. As a result of this process, the Fe2O3 oxygen is heated and oxidized, leading to the formation of irregularly shaped solid Iron (Fe) particles.

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