Recovery of cutting fluids and silicon carbide from slurry waste

Shen, Zih-Yao; Chen, Chi-Yao; Lee, Maw-Tien

doi:10.1016/j.jhazmat.2018.09.014

Cited by 23 publications

(6 citation statements)

References 53 publications

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“…For example, Chen et al [ 168 ] developed a novel electrochemical micromembrane technology to demulsify oily wastewater and recover oil from oil-in-water cutting fluids. Similarly, Shen et al [ 169 ] presented an approach to recover cutting fluids and SiC from slurry waste. Although eco-friendly cutting fluids should be the target to move forward, the importance of maintaining the process outputs will remain.…”

Section: Process Inputsmentioning

confidence: 99%

Precision micro-milling process: state of the art

2020

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Micro-milling is a precision manufacturing process with broad applications across the biomedical, electronics, aerospace, and aeronautical industries owing to its versatility, capability, economy, and efficiency in a wide range of materials. In particular, the micro-milling process is highly suitable for very precise and accurate machining of mold prototypes with high aspect ratios in the microdomain, as well as for rapid micro-texturing and micro-patterning, which will have great importance in the near future in bio-implant manufacturing. This is particularly true for machining of typical difficult-to-machine materials commonly found in both the mold and orthopedic implant industries. However, inherent physical process constraints of machining arise as macro-milling is scaled down to the microdomain. This leads to some physical phenomena during micro-milling such as chip formation, size effect, and process instabilities. These dynamic physical process phenomena are introduced and discussed in detail. It is important to remember that these phenomena have multifactor effects during micro-milling, which must be taken into consideration to maximize the performance of the process. The most recent research on the micro-milling process inputs is discussed in detail from a process output perspective to determine how the process as a whole can be improved. Additionally, newly developed processes that combine conventional micro-milling with other technologies, which have great prospects in reducing the issues related to the physical process phenomena, are also introduced. Finally, the major applications of this versatile precision machining process are discussed with important insights into how the application range may be further broadened.

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Section: Process Inputsmentioning

confidence: 99%

Precision micro-milling process: state of the art

2020

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“…In the absence of filtration of the cutting fluid, impurities return to the reservoir, reducing the useful life of the pump, the cutting tool, and the cutting fluid itself [13]. The filter is a device that retains all insoluble contaminants from a fluid, is usually employed to separate solid particles from liquids [14]. It is classified into two types: chemical and mechanical.…”

Section: Introductionmentioning

confidence: 99%

Study of a Cutting Fluid Application System Adaptation on a Bench Milling Machine for an Academic Laboratory Environment

Martins

Fernandes

2023

J. Mod. Mech. Eng. Technol.

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Cutting fluid is a resource that can benefit machining, improving the service life, surface, and dimensional qualities of cutting tools. For the operation of a basic cutting fluid application system, it is necessary to consider the components that store, filter, and induce the flow of the cutting fluid. Some essential components are the reservoir, the filter, and the pump. Aiming to provide better machining conditions, this study presented the proposal for designing and manufacturing a cutting fluid application system for an academic laboratory's bench drill/milling machine. The experimental research characterized the study methodology, in which the system was built with the least possible resources. The main result showed that the system achieved the proposed objective. For pump selection, a system of equations was developed in Microsoft Excel software, which indicated a pressure variation in the flow system of approximately 15 kPa. After the three-dimensional modeling, a script for the manufacture and assembly of the system components was prepared, involving the processes of forming, machining and welding. Adaptations were made to the machine tool, such as the insertion of a limit switch that reduced the longitudinal displacement of the work table by 150 mm. An electronic command system was inserted to control the cutting fluid flow. In the testing phase, positive aspects were observed (reservoir position, absence of leaks, cutting fluid flow, among others) and negative aspects (cutting fluid return paths). Some further improvements proved possible, especially on a machine not designed to have a cutting fluid system.

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“…A large amount of hazardous silicon slurry waste is generated during the slicing of silicon ingots into thin silicon wafers for the fabrication of integrated circuit chips and solar cells [7][8][9][10]. The amount of silicon waste slurry is expected to be increasing worldwide, as silicon wafer production increases.…”

Section: Introductionmentioning

confidence: 99%

“…Silicon wafer cutting slurry is mainly composed of SiC (as the abrasive), propylene glycol (as the cooling liquid), silicon (residual material after slicing) [12]. Currently, silicon slurry waste is mainly disposed of using incineration or land-filling [10,12]. It results in serious environmental damage and substantial wasting of resources, therefore, how to treat this waste becomes an important issue.…”

Section: Introductionmentioning

confidence: 99%

Towards a viable method of reusing silicon carbide. Physicochemical analyses in the studies on industrial application of the material

Niemczyk-Wojdyła¹,

Fornalczyk²,

Willner³

et al. 2021

Environ. Protect. Eng.

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The paper presents an investigation on the feasibility of recovery of the highly valuable silicon carbide (SiC) from the slurry waste generated from silicon wafer production in the photovoltaic and semiconductor industry. Compared to the other techniques of recycling, a facile and low-cost method of waste treatment via heat drying followed by low-energy mixing in a shaker mixer was proposed. As the result of the treatment, the slurry waste was converted into a powdered form with dominant content of SiC. Separated SiC material was characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray powder diffraction, and sieve analysis. In addition, analyses of the bulk density, moisture content and melting test were carried out. As was confirmed by the physicochemical analyses, the dominant sieve fraction was in the range of 0.1-0.06 mm, the purity level was a minimum 99% mass of SiC, the moisture content -0.3%, the bulk density -1.3 g/cm 3 . The physicochemical characteristics of the material were crucial for understanding the material performance, assessment of the material quality and determining the perspective directions of the industrial application. The studies revealed that the material exhibited a high application potential as abrasive, especially in abrasive grinding and waterjet cutting.

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Recovery of cutting fluids and silicon carbide from slurry waste

Cited by 23 publications

References 53 publications

Precision micro-milling process: state of the art

Precision micro-milling process: state of the art

Study of a Cutting Fluid Application System Adaptation on a Bench Milling Machine for an Academic Laboratory Environment

Towards a viable method of reusing silicon carbide. Physicochemical analyses in the studies on industrial application of the material

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