Sökning: "bauxite"

Visar resultat 1 - 5 av 6 uppsatser innehållade ordet bauxite.

1. 1. Alkali Control in the Blast Furnace – Influence of Modified Ash Composition and Charging Practice

   Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Industriell miljö- och processteknik

   Författare :Jenny Olofsson; [2017]
   Nyckelord :Experimental blast furnace; coke; coke ash; reactivity; characterization; catalyst; coke degradation;

   Sammanfattning : The enrichment of alkali in the blast furnace has been proven to be a catalyst of coke gasification and is thus a key parameter in the degradation of coke. Alkali also directly destroys the carbon structure, increases the risk of scaffold formation, increases the load and attacks the refractory. LÄS MER

3. 2. Let's talk aluminium : Evaluating the aluminium stewardship initiative's effectiveness and applicability as a mechanism in sustainability governance from a multi-stakeholder perspective

   Master-uppsats, Lunds universitet/LUCSUS

   Författare :Jens Heidingsfelder; [2015]
   Nyckelord :key informant interview; Germany; Aluminium stewardship initiative; corporate social responsibility; resource certification; sustainability science; Earth and Environmental Sciences;

   Sammanfattning : Mining bauxite and producing aluminium causes severe sustainability challenges. Although the usage of these non-renewable resource is inherently unsustainable, the global economy fosters an increased use of supposed “eco-friendly” aluminium. German industry is an important user of aluminium and a key player in the aluminium industry. LÄS MER

4. 3. Propensity of bed materials used in dual fluidized beds to retain ash-forming elements from biomass fuels

   Uppsats för yrkesexamina på avancerad nivå, SLU/Dept. of Energy and Technology

   Författare :Björn Folkeson; [2014]
   Nyckelord :fluidized bed; ash retention; gasification; combustion; bed material;

   Sammanfattning : The main aim of this work was to investigate the propensity of bed materials to retain ash-forming elements from biomass under conditions relevant to dual fluidized bed gasification (DFBG). The investigation was carried out in a laboratory-scale bubbling fluidized bed reactor in which biomass was gasified with steam and the unconverted char was combusted in the temperature range 800–900 ° C. LÄS MER

5. 4. Propensity of bed materials used in dual fluidized beds to retain ash-forming elements from biomass fuels

   Uppsats för yrkesexamina på avancerad nivå,

   Författare :Björn Folkeson; [2014]
   Nyckelord :Fluidized bed; ash retention; gasification; combustion; bed material; Fluidiserad bädd; askämnen; förgasning; förbränning; bäddmaterial;

   Sammanfattning : The main aim of this work was to investigate the propensity of bed materials to retain ash-forming elements from biomass under conditions relevant to dual fluidized bed gasification (DFBG). The investigation was carried out in a laboratory-scale bubbling fluidized bed reactor in which biomass was gasified with steam and the unconverted char was combusted in the temperature range 800–900 ° C. LÄS MER

7. 5. Joining Babylon - Opportunity or Curse - A study about the local Population's Perceptions of the Mining Industry in Jamaica

   Kandidat-uppsats, Göteborgs universitet. Institutionen för kulturgeografi och ekonomisk geografi

   Författare :René Brauer; [2013-04-17]
   Nyckelord :jamaica; local polulation; perception; mining; MultinationalCorporations MNC ; Corporate Social Responsibility;

   Sammanfattning : This thesis tries to give an accurate description of the perceptions of the local people in a developing country about big Multinational Corporations (MNC) operating within their community, in one particular case. The big MNC will be represented by a bauxite mining company that also refines bauxite to alumina. LÄS MER