Secondary Raw Material


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Secondary Raw Material

 

materials and articles which, after complete initial use (wear), may be used repeatedly in production as starting material.

The most important forms of secondary raw material are scrap, such as usable waste of ferrous, nonferrous, and precious metals; spent lubricants; rejected material from components; discontinued articles made of polyethylene; and worn out tire treads, spent sulfuric acid, and waste paper. Secondary raw material also includes machines, equipment, and their components that have fallen out of service because of wear; metal parts obtained in the demolition of buildings and old ships; ferrous and nonferrous metals contained in everyday articles and articles of general consumption unfit for use; and end waste products of production that constitute an irrevocable loss for a given enterprise (for example, ashes in electrical power plants). Most important for the national economy, both in terms of the magnitude of the resource and its value, are the various secondary metals that are formed in the shape of depreciated scrap and industrial waste.

Depreciated scrap resources are determined by a number of factors, such as the quantity of metal resources of a country, the age of these resources, and the material composition. In conjunction with the increased supply of automobiles, the reclamation of old vulcanized rubber has ever-increasing importance in saving raw rubber. Such measures as the reclamation of lubricating materials (particularly in machine building), recovery of volatile solvents, reconstitution and repeated use of spent sulfuric acid, and reconstitution of catalytic agents containing precious and rare metals also play important roles. The importance of secondary raw materials in the food industry and other branches is increasing.

The use of secondary raw materials in various branches of industry is important for the further development of the national economy of the USSR, both as a source of additional material resources and as a factor in reducing the prime cost of products and lowering the proportionate capital outlays; it is also important in increasing the rate of growth of production. In the USSR specialized organizations have been established to collect secondary raw materials (purchasing centers) and procure, sort, and dress them and give them initial processing. These organizations either carry out the subsequent processing and reprocessing themselves or else send the collected secondary raw materials to enterprises that will use the materials after processing and reprocessing them. The collection and use of secondary raw material is included in the planning process in the USSR.

References in periodicals archive ?
The use of reduced zinc sulfide as a secondary raw material in the form of additives to the dyes of colored glazed coating caused by its solubility in melts of silicate glaze.
Only the initial secondary raw material sorting works satisfactorily, however, the secondary waste sorting systems, as well as hazardous waste collection, waste recycling and recovery systems have not been created yet.
On the first day of the conference the participants from both public and private sector discussed and exchanged views on waste separation, processing and transformation, and addressed the issue of how to close the gap between primary and secondary raw materials.
Contract For The Sale Of The Secondary Raw Material "Paper / Cardboard" From The Collection Performed By S.
The entire value chain is represented, from raw materials suppliers, packaging converters, brand owners and retailers to producer responsibility organisations, collectors, sorters and recyclers, as well as other technology suppliers and end users of the secondary raw materials.
For cost reasons, recovered secondary raw materials, such as flakes from used PET bottles, have long been a popular commodity in both the plastic and in the fiber industry.
In order to improve the functioning of this system in Macedonia, the Association for Secondary Raw Materials and Waste Management at the Economic Chamber of Macedonia demands stimulations for recycling the electronic and electrical waste, because there is not a single domestic company that performs this duty, and we recycle our waste in Bulgaria.
Feed to the smelters is supplied through concentrates from Boliden's own mines and concentrates and secondary raw materials from external suppliers.
He says the circular economy refers to an industrial economy that, contrary to a traditional linear economy, reclaims used materials and recycles them as secondary raw materials for new products.
The editors have organized the contributions that make up the main body of the text in four chapters devoted to binders, composite materials, building materials based on secondary raw materials, and technology and testing materials.
These operators fail to meet the conditions for storage and treatment of secondary raw materials.
The calculation was carried out on the purchase prices of secondary raw materials in the region," the expert explained.