Important Issues related to Re-rolling mills in SME Sector...

Important Issues related to Re-rolling mills in SME Sector The steel sector in India consists of four branches namely (i) multi-million tons integrated steel plants, (ii) mini integrated steel plants, (iii) individual units of steel melting producing pencil ingots, and (iv) re-rolling mills which are rolling steel from billets, pencil ingots and scrap steel. Most of the units under last two categories are in small and medium enterprise (SME) sector. All the four branches which constitute the steel sector play a very important role in the steel economy of the country. Re-rolling mills has a considerable contribution to the steel production of the country.  There are around 1800 re-rolling mills in SME sector in India. The rolling capacities of these mills are mostly in the range of 8,000 tons per year to 80,000 tons per year. On a very conservative estimate, these mills contribute more than 20 % of the total production of finished steel in the country. Hence, these mills play a very important role in supporting the steel economy of the country. The conditions of the most of the re-rolling mills can be termed as not healthy. They operate with very old technologies and operate at low level of productivities and high level of energy consumptions. There are many problems and challenges associated with these mills. Several agencies have carried out detailed studies of the steel and re-rolling units of SME sector. Some of these studies have identified certain barriers associated with these mills (Fig 1) which include (i) high energy consumption due to the use of obsolete technologies, (ii) lack of awareness and knowledge on several fronts, (iii) lack of proper operational procedures, (iv) a negative mind-set among owners of the mills, and (v) lack of finance to effect necessary changes...

Role of Inspection and Testing in maintaining Product Quality...

Role of Inspection and Testing in maintaining Product Quality It is important for an organization that the quality of the products is maintained when they are delivered to the customers since the product quality is the top most drivers for the success of the organization. However, in the organization, employees do make mistakes and machines and equipment do have breakdowns. These results into the production process getting destabilize which in turn cause production of the products which do not meet with the requirements specified in the standards and specifications. Hence, there is necessity of inspection and testing so as to ensure that the products delivered to the customer are complying with the specification as required by the customer. Inspection and testing measure and determine the quality level of the products. These are the activities or techniques used to verify the product quality as well to ensure that the results of the manufacturing process are the same as was expected. Inspection and testing activities are done to uncover the defects in the products and reporting to the production management who make the decision to allow or deny product release. Inspection and testing during the process of the manufacture of a product are the most common methods of attaining standardization, uniformity, and quality of workmanship. These are the process of controlling the product quality by comparing it with the established standards and specifications. It is one of the operational parts of the quality control. During the inspection and testing, If the product does not fall within the zone of acceptability then it gets rejected and corrective measures are required to be taken by the production management so as to ensure that the product manufactured further conform to specified standards and specifications. Inspection and testing are indispensable...

Components of Product Quality Management...

Components of Product Quality Management Product quality is the group of features and characteristics which determines the capacity of the product to meet the specification requirements of a standard or of a customer. It is often defined as ‘the ability to fulfill the customer’s needs and expectations’. It is also sometimes defined as ‘meeting specifications at the lowest possible cost’ as well as ‘delivering the value that a customer derives from a product’. It is important for the organization that the quality products are delivered to the customers since they are the top most drivers for the organizational success. After all, growing sales make the foundation of the organizational performance not only to remain consistent but also make it strong and sturdier. However, in the organization, employees do make mistakes and machines and equipment do have breakdowns. The goal of the product quality management is to minimize this so that the customer remains happy with the product performance and reorders the products. For this the organization is to put a relentless focus on product quality. Improving product quality save the organization the cost since it needs not to do things to cover up old mistakes. Improving quality also raises the employees’ engagement since they like to be on a high performance team. Product quality management includes the following four major components. They are (i) quality planning, (ii) quality control, (iii) quality assurance, and (iv) quality improvement. Quality planning Quality planning is the process for ‘identifying which quality standards are relevant to the product and determining the procedures and techniques to satisfy them’. Quality planning means how to fulfill the process and deliverable products quality requirements. It helps the organization to schedule all of the tasks needed to make sure that the products meets the...

Product Quality and its Management...

Product Quality and its Management Product quality is the group of features and characteristics which determines the capacity of the product to meet the specification requirements of a standard or of a customer. It is often defined as ‘the ability to fulfill the customer’s needs and expectations’. It is also sometimes defined as ‘meeting specifications at the lowest possible cost’ as well as ‘delivering the value that a customer derives from a product’. Product quality needs to be defined firstly in terms of parameters or characteristics, which vary from product to product. The quality of the product can be controlled during its manufacturing and it makes the product free from deficiency and defects. A specification is the minimum requirement according to which the producer makes and delivers the product to the customer. In setting specification limits, the following is required to be considered. The user’s and/or customer’s needs Requirements provided for in national and/or international standards Requirements of specifications of national and/or international standards with restrictions to meet specific needs of the customer The competitor’s product specifications, in order to gain marketing advantages Brand related requirements of the product. Requirements relating to product safety and health hazards provided for in the statutory and regulatory requirements As described above, the product quality is the ability to satisfy the stated needs. From this definition, product quality can be described by nine dimensions or characteristics. These nine dimensions are as follows. Performance – It is the product’s primary operating characteristics. Product is to give expected performance during its use. Product features – The product is to meet the requirements of its features. For example a rebar is to have two longitudinal ribs and several cross ribs at specific intervals. Reliability – It is the probability of the...

Productivity and Product Quality in Continuous Casting Machine Jun25

Productivity and Product Quality in Continuous Casting Machine...

Productivity and Product Quality in Continuous Casting Machine Continuous casting is the process by which liquid steel is solidified into a semifinished steel product (billet, bloom, or slab etc.) for subsequent rolling in the hot rolling mills. Continuous casting of liquid steel was introduced for commercial application in 1950s. In the relatively short time span since the introduction of continuous casting for the commercial application, the process has evolved with a wide variety of new process developments directed towards achieving improved productivity and superior product quality. These developments include new design concepts of continuous casting machines, metallurgical practices, and the application of process control and automation by computer systems. The main driving force behind these developments has been the recognition that substantial improvement in the yield and energy savings are possible which have a dramatic effect on operating cost. Through these developments, it has been possible to achieve major quality improvements of the continuous cast product.  Present day continuous casting machines produce cast steel products having quality which is fully equivalent to and exceeds that of products produced from ingot steel. Modern continuous casting machines efficiently produce essentially all grades of steels, including the highest qualities for critical applications. Productivity improvement The two methods to improve the productivity of the continuous casting process include improving the continuous casting machine throughput (tons/hour) and net-working ratio. The through put of the continuous casting machine is improved by increasing the casting speed as well as by increasing the cross sectional area, while the net- working ratio is improved by decreasing the casting machine down time. The casting speed of the continuous casting machine is limited by several different phenomena as given below. A high casting speed results in a significant increase in the flow velocity of the...