Xem 1-20 trên 147 kết quả Raw materials
  • Procurement of raw materials, auxiliary and fuels under adherence to the according to schedule, qualitative and environmental relevant specifications

    pdf4p quangman 21-10-2009 64 14   Download

  • Raw materials mark the beginning of a value-added chain. In times of increasing globalization their availability is a precondition for prosperity, productivity and development of a country’s economy. Raw materials have always been needed for many purposes. Global demand had its origin in the Bronze and Iron Ages and increased exponentially during the Industrial Revolution in the 19th Century. Worldwide demand for raw materials rapidly increased in the 20th Century, caused by the explosive growth of the world population and global economic productivity.

    pdf651p taurus23 25-09-2012 23 7   Download

  • Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : Wet-chemistry processing of powdery raw material for high-tech ceramics

    pdf10p sting03 06-02-2012 12 4   Download

  • China’s papermaking technology itself is relatively similar across establishments because, until recently, the industry relied on a couple of domestic manufacturers making nearly identical machines for each stage in the papermaking process (CTAPI (1993)). The critical differences in the technology come from the use of two alternative raw materials (wood and non-wood fibers) and from the production of either bleached or unbleached papers. Both differences are important to understanding the industry’s pollution.

    pdf30p loixinloi 08-05-2013 18 4   Download

  • "Nonwoven fabrics" content presentation: Raw materials, classificaion of Nonwoven, production steps for different methods, types of webs and their forming techniques, nonwoven fabric bonding techniques,... Invite you to consult.

    pdf0p tramnamcodon_07 26-04-2016 10 1   Download

  • (BQ) Part 2 book "Anatomy and physiology in health and illness" presents the following contents: Intake of raw materials and elimination of waste (The respiratory system, introduction to nutrition, the digestive system,...), protection and survival (the skin, resistance and immunity, the joints,...).

    249p thangnamvoiva6 19-07-2016 5 1   Download

  • The characteristic data, economic figures, general assessments and indications concerning all the properties are not guaranteed and cannot be used for calculations, computations or other operations to determine design, cost-effectiveness or profitability. Readers must verify the technical data and economic figures with their own suppliers of raw materials or parts, and other current technical and economic sources. Prototypes and tests under operating conditions are essential.

    pdf896p minhtu837 11-09-2011 255 129   Download

  • The nature of the tire and rubber industry has changed over the last 30 to 40 years in that, like all other industries, it has come to recognize the value of using renewable sources of raw materials, recycling materials whenever possible, and examining the potential of reclaiming used materials for fresh applications.

    pdf575p ktcn_1 17-07-2012 100 25   Download

  • A text/reference regarding the structure and function of components used in perfume development and the process of developing perfumes. Covers gas chromatography, mass spectrometry and a host of other analytical techniques; the esthetics and techniques of perfume development; the manifold and ever-changing safety-related requirements of countries and customers; concerns about the environmental impact of materials and impurities which affect the perfumer's work.

    pdf348p nhulan0908 29-09-2012 41 20   Download

  • Manufacturing is a vital activity for a society from a strategic point of view. It has a long history in human civilizations and gives a society a definite edge over its competitors. A manufacturing system can be viewed as an arrangement of tasks and processes, properly put together, to transform a selected group of raw materials and semi-finished products to a set of finished products. Historically, manufacturing activities have grown over centuries and their evolution can be divided into three stages....

    pdf276p 123859674 04-07-2012 39 18   Download

  • Concrete can be classified as composite material and that is a combination of different components which improve their performance properties. In general case binder component which can be in hard crystalline or amorphous state is considered as the matrix of composite material. In concrete matrix phase the grains of aggregates (dispersed phase) are uniformly distributed.

    pdf179p beobobeo 01-08-2012 41 12   Download

  • The current book consists of eighteen chapters divided into three sections. Section I includes nine topics in characterization techniques and evaluation of advanced ceramics dealing with newly developed photothermal, ultrasonic and ion spattering techniques, the neutron irradiation and the properties of ceramics, the existence of a polytypic multi-structured boron carbide, the oxygen isotope exchange between gases and nanoscale oxides and the evaluation of perovskite structures ceramics for sensors and ultrasonic applications....

    pdf382p cucdai_1 19-10-2012 37 12   Download

  • The book offers comprehensive coverage of the broad range of scientific knowledge in the fields of advances in induction and microwave heating of mineral and organic materials. Beginning with industry application in many areas of practical application to mineral materials and ending with raw materials of agriculture origin the authors, specialists in different scientific area, present their results in the two sections: Section 1-Induction and Microwave Heating of Mineral Materials, and Section 2-Microwave Heating of Organic Materials....

    pdf0p cucdai_1 20-10-2012 40 12   Download

  • Hydrogenated amorphous silicon, a new form of a common element, is a semiconductor that has come of age. Its scientific attractions include a continuously adjustable band gap, a usable camer lifetime and diffusion length, efficient optical transitions, and the capability of employing either nor p-type dopants. Furthermore, it can be fabricated very easily as a thin film by a technology that not only inherently escapes the expenst: of crystal perfection but also requires significantly smaller amounts of raw materials....

    pdf317p nhulan0908 29-09-2012 31 10   Download

  • Transfer and storage of conformal material for a problem-free further use

    pdf5p quangman 21-10-2009 30 9   Download

  • Industry in Jepara comprises a complex network of relationships and flexible subcontracting. The first aim of this survey was therefore to investigate how these relationships are structured, and how production is organised and linked to the different market segments, including the sources of the wood. In addition, we sought to record and quantify these relationships to understand the contribution of a unit of raw material to the employment, education, and social wealth of people in the system7 .

    pdf59p can_thai 10-12-2012 31 5   Download

  • Although phosphate rock and potash are used as raw materials for a wide range of applications, the most important use by far is the manufacture of mineral fertilizers. The primary source of these minerals is geological ore deposits formed through past sedimentary or igneous activities. In the case of potash, concentrated brines are also a significant source. This chapter provides a brief overview of the major activities involved in the mining, handling and benefi- ciation of phosphate rock and potash ore....

    pdf0p tieuyeuquai456 05-10-2012 26 4   Download

  • The formation of persistent organic pollutants such as polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs), known collectively as dioxins, is a recognized concern for cement manufacturing. Dioxins have the potential to form if chlorine is present in the input fuel or raw materials. Formation can be repressed, however, by the high temperatures and long residence times that are standard in cement kilns (Karstensen 2008).

    pdf125p loixinloi 08-05-2013 21 4   Download

  • Leading mining companies have taken up the chal- lenge and are pushing beyond minimum legal requirements through voluntary initiatives, to ensure their continued “license-to-operate” from the com- munity as well as increasing their competitive advantage through continuous, voluntary improve- ments in environmental performance. As with all mining activities, the extraction and bene- ficiation of phosphate rock and potash to produce mineral fertilizer raw material has the potential to cause environmental impacts.

    pdf90p tieuyeuquai456 05-10-2012 17 3   Download

  • Petroleum-based industrial products have gradually replaced products derived from biological materials. However, biologically based products are making a comeback--because of a threefold increase in farm productivity and new technologies. Biobased Industrial Products envisions a biobased industrial future, where starch will be used to make biopolymers and vegetable oils will become a routine component in lubricants and detergents.

    pdf162p mnemosyne75 02-02-2013 17 3   Download

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