Flotation of Barite From Complex Iron Ore

The present contribution is aimed at the production of a high-grade barite concentrate front complex iron ores of ore-deposit Kremikovtzi,Bulgaria. The ores consisting main-ly of limonite, hematite and siderite have been bene-ficiated by high intensity electromagnetic wet separation on magnetic separator type Jones DP 317. Barite flotation has been succeeded from non-magnetic fraction merged with ground barite rear materials. The collecting flotation agents OMC 199 and AERO 8-15 (2:1 ratio) at the total dosage rate of 400-450 g/t have been applied. The frother OrePrep F 501 consumption has been 10-15 g/t_ Water glass has been applied as a silica depressant at the application rate of 4-4.5 kg/t. Annual output of flotation barite concentrate reach 120 000 tons. Of this quantity 75 wt. i7c are exported in bulk with total assay of BaSO4 and SrSO4 97-98 wt % and 8 wt % moisture. The rest part is dried, ground and bagged. The qualirr corresponds to OCMA (Oil Companies Material Association) /API (American Petroleum Institutes requirements

Instruments for Analysis of the External Environment through the Prism of Self-Managed Work Teams

The article studies the specific characteristics of the external environment because they create actual possibilities for the introduction of self-management in the functioning of work teams in the Bulgarian organizational practice. An emphasis is put on the organizational context within which self-managed work teams (SMWT) function. The study also identifies the key instruments integrated in the model of analyzing the external environment in the process of transforming traditional work structures into selfmanaged ones. The article outlines the effects of the direct and indirect environment factors on the various dimensions of SMWT, namely structural characteristics, work and interpersonal processes, etc. The author supports the idea that the sustainable development of the SMWT-concept and the creation of added value for organizations require adequate monitoring of the competitive environment factors (specific microenvironment) and the common environment. This is one of the paradigms of modern management. Changes in the external environment affect the internal integration of the system and vice versa – the damaged internal processes limit the organization’s potential for adapting to the environment

Specific dimensions of management roles in a self-managed work teams (SMWT)

The article’s objects of research are the specific dimensions of management roles in a team environment. Its main focus is the organizational context in which self-managed work teams functions. It identifies the key changes in manager attitudes, when they perform their roles during transformation from traditional to team-based structures. It analyzes the main issues in social practice, while seeking solutions for developing managerial potential. It explores specific means and tools for effective and adequate stimulation of managerial support. The conclusion that must be made is that sustainable development of SMWT and creating added value for the organization requires senior management to redesign and reorganize stereotypical internal interactions in accordance with the specific characteristics of the new team environment. Otherwise there is a potential for problems and possible failure of the SMWT concept

Качество и иновации – системи и стратегии за внедряване на тоталното управление на качеството

Abstract. The subject of the study is the theoretical and methodological foundations of the TQM concept. The focus is on the principles, models, techniques and tools for implementing the total quality management in the Bulgarian socio-cultural environment. The main idea of the TQM concept is to guide the business from a consumer perspective. The emphasis is on fast and adequate response to market needs in a turbulent VUCA environment and continuous pressure for change. The main requirements in the process of transformation from traditional to innovative management are analyzed. The research models synthesize different solutions applied in social practice. The TQM concept does not guarantee high results at any cost, but it is a necessary means to ensure strategic goals, cultural attitudes, motivation, rational use of resources, and the adequacy of change. The main thesis of the author is that the typical practices of TQM, such as learning and process improvement, system exchange, analysis and benchmarking, give rise only to advantages if they are inherent features of the organization. Key words: Total Quality Management, Zero defect, Just in Time, cost of quality, innovations, human capital, managing chang

Virtual Teams – a new paradigm in management theory

This paper studies the types of teams in management and identifies the essential characteristics of organizational models applied in management practice: work group – team – self-managed work team and virtual team. The focus is put on virtual teams. The key prerequisites, regularities and processes associated with the design and functioning of highly effective virtual teams are analyzed. The indicators of team effectiveness are specified and the factors influencing immediate results are analyzed

Managing high performance virtual teams

This paper studies the types of teams in management and identifies the essential characteristics of organizational models applied in management practice: work group – team (high performance) – self-managed work team and virtual team. The focus is put on virtual teams. The key prerequisites, regularities and processes associated with the design and functioning of highly effective virtual teams are analyzed. The indicators of team effectiveness are specified and the factors influencing immediate results are analyzed

OUR EXPERIENCE IN TREATMENT OF CHILDISH ALLERGIC RHINOSINUITIS WITH HYDROCORTIS0N-PHON0PH0RESIS

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Raman scattering study of (Kx_xSr1−x_{1-x})Fe2_2As2_2 (xx = 0.0, 0.4)

Polarized Raman spectra of non-superconducting SrFe$_2$As$_2$ and superconducting K$_{0.4}$Sr$_{0.6}$Fe$_2$As$_2$ ($T_c = 37$ K) are reported. All four phonon modes (A$_{1g}$ + B$_{1g}$ + 2E$_g$) allowed by symmetry, are found and identified. Shell model gives reasonable description of the spectra. No detectable anomalies are observed near the tetragonal-to-orthorhombic transition in SrFe$_2$As$_2$ or the superconducting transition in K$_{0.4}$Sr$_{0.6}$Fe$_2$As$_2$.Comment: 4 pages, 4 figures, 2 table