Design of an automated grinding media charging system for ball mills
- Rupare, W.F., Nyanga, L., Van der Merwe, A.F., Matope, S., Mhlanga, S.
- Authors: Rupare, W.F. , Nyanga, L. , Van der Merwe, A.F. , Matope, S. , Mhlanga, S.
- Date: 2013
- Subjects: Mill load , Grinding production ratio
- Type: Article
- Identifier: uj:4919 , http://hdl.handle.net/10210/13019
- Description: The parameters of mill load (ML) not only represent the load of the ball mill, but also determine the grinding production ratio (GPR) of the grinding process. Monitoring and recognition of milling conditions have significant effect on the operating efficiency, product quality, and energy and grinding media consumption for the milling circuit. This paper presents an automated grinding media charging system incorporating a multi-agent system developed in Java Agent Development Environment (JADE). A control logix program is designed to determine the precise quantities of grinding media to be charged in an incremental manner such that shock loading is avoided. The multi-agent system created in JADE monitors the power drawn and the mill load of the ball mill such that proper charging conditions are established. High quality of the regulation process is achieved through utilization of the control logix and the multi-agent system.
- Full Text:
- Authors: Rupare, W.F. , Nyanga, L. , Van der Merwe, A.F. , Matope, S. , Mhlanga, S.
- Date: 2013
- Subjects: Mill load , Grinding production ratio
- Type: Article
- Identifier: uj:4919 , http://hdl.handle.net/10210/13019
- Description: The parameters of mill load (ML) not only represent the load of the ball mill, but also determine the grinding production ratio (GPR) of the grinding process. Monitoring and recognition of milling conditions have significant effect on the operating efficiency, product quality, and energy and grinding media consumption for the milling circuit. This paper presents an automated grinding media charging system incorporating a multi-agent system developed in Java Agent Development Environment (JADE). A control logix program is designed to determine the precise quantities of grinding media to be charged in an incremental manner such that shock loading is avoided. The multi-agent system created in JADE monitors the power drawn and the mill load of the ball mill such that proper charging conditions are established. High quality of the regulation process is achieved through utilization of the control logix and the multi-agent system.
- Full Text:
Investigation of the effects of lubricant fat content on drawn copper wires
- Chiduwa, A.C., Nyanga, L., Mhlanga, S., Kanyemba, G., Van der Merwe, A.F.
- Authors: Chiduwa, A.C. , Nyanga, L. , Mhlanga, S. , Kanyemba, G. , Van der Merwe, A.F.
- Date: 2013
- Subjects: Cable manufacturing , Lubricant fat content , Lean manufacturing , Copper wire manufacturing
- Type: Article
- Identifier: uj:4963 , http://hdl.handle.net/10210/13064
- Description: The Lean Manufacturing goal of reducing waste and increasing productivity has made it a necessity to produce good quality products in manufacturing industries at a low cost. In the cable manufacturing companies this can be achieved by optimising the wire drawing process. One way to meet the desired quality of the drawn wires is to improve lubricant efficiency through installation of an automatic, continuous lubricant fat content control system on the drawing machine. The paper shows a method of finding the optimum lubricant concentration for producing good quality copper wires using Taguchi experiments. Taguchi experiments are employed to analyse the effects of different lubricant fat content levels on the tensile strength and lubricant temperature. The results from the experiments indicated that the tensile strength of the wire is affected by low lubricant fat content. The lower the lubricant fat content: the lower the tensile strength drawing lubricant resulting in numerous wire breakages that affect the quality of the final product, namely the cable.
- Full Text:
- Authors: Chiduwa, A.C. , Nyanga, L. , Mhlanga, S. , Kanyemba, G. , Van der Merwe, A.F.
- Date: 2013
- Subjects: Cable manufacturing , Lubricant fat content , Lean manufacturing , Copper wire manufacturing
- Type: Article
- Identifier: uj:4963 , http://hdl.handle.net/10210/13064
- Description: The Lean Manufacturing goal of reducing waste and increasing productivity has made it a necessity to produce good quality products in manufacturing industries at a low cost. In the cable manufacturing companies this can be achieved by optimising the wire drawing process. One way to meet the desired quality of the drawn wires is to improve lubricant efficiency through installation of an automatic, continuous lubricant fat content control system on the drawing machine. The paper shows a method of finding the optimum lubricant concentration for producing good quality copper wires using Taguchi experiments. Taguchi experiments are employed to analyse the effects of different lubricant fat content levels on the tensile strength and lubricant temperature. The results from the experiments indicated that the tensile strength of the wire is affected by low lubricant fat content. The lower the lubricant fat content: the lower the tensile strength drawing lubricant resulting in numerous wire breakages that affect the quality of the final product, namely the cable.
- Full Text:
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