The aim of the project was to establish rate and mechanisms of solid state reduction of manganese ores. The project studied carbothermal reduction of manganese oxide MnO, two Groote Eylandt (Australian) and Wessels (South African) manganese ores in hydrogen, helium and argon atmospheres at temperatures up to 1400C for MnO and 1200C for manganese ores. Experiments were conducted in the fixed bed reactor with on-line off-gas analysis. The major findings are as follows. ?? Rate and degree of reduction of MnO and ores increased with increasing temperature. ?? Reduction of MnO and manganese ores at temperatures up to 1200C was faster in helium than in argon, and much faster in hydrogen than in helium. The difference in MnO reduction in hydrogen and helium decreased with increasing temperature to 1400C. ?? Addition of up to 7 vol% of carbon monoxide to hydrogen had no effect on MnO reduction at 1200C. ?? In the process of carbothermal reduction of ores in hydrogen at 1200C, silica was reduced. ?? Reduction of both GE ores was slower than of Wessels ore. This was attributed to high content of iron oxide in the Wessels ore. ?? Carbon content in the graphite-ore mixture had a strong effect on phases formed in the process of reduction; thus, in the reduction of Wessels ore with 12-16 wt% C, a-Mn and Mn23C6 were formed; when carbon content was above 20 wt%, oxides were reduced to carbide (Mn,Fe)7C3. ?? Kinetic analysis showed that mass transfer of intermediate CO2 from oxide to graphite in carbothermal reduction in inert atmosphere was a contributing factor in the rate control. ?? High rate of reduction of manganese oxide in hydrogen was attributed to formation of methane which facilitated mass transfer of carbon from graphite to oxide. Hydrogen was also directly involved in reduction of manganese ore reducing iron oxides to metallic iron and higher manganese oxides to MnO. Reduction of Wessels and Groote Eyland Premium Fines ores in the solid state is feasible at temperatures up to 1200C; while temperature for solid state reduction of Groote Eyland Premium Sands is limited by 1100C.

The aim of the project was to establish rate and mechanisms of solid state reduction of manganese ores. The project studied carbothermal reduction of manganese oxide MnO, two Groote Eylandt (Australian) and Wessels (South African) manganese ores in hydrogen, helium and argon atmospheres at temperatures up to 1400C for MnO and 1200C for manganese ores. Experiments were conducted in the fixed bed reactor with on-line off-gas analysis. The major findings are as follows. ?? Rate and degree of reduction of MnO and ores increased with increasing temperature. ?? Reduction of MnO and manganese ores at temperatures up to 1200C was faster in helium than in argon, and much faster in hydrogen than in helium. The difference in MnO reduction in hydrogen and helium decreased with increasing temperature to 1400C. ?? Addition of up to 7 vol% of carbon monoxide to hydrogen had no effect on MnO reduction at 1200C. ?? In the process of carbothermal reduction of ores in hydrogen at 1200C, silica was reduced. ?? Reduction of both GE ores was slower than of Wessels ore. This was attributed to high content of iron oxide in the Wessels ore. ?? Carbon content in the graphite-ore mixture had a strong effect on phases formed in the process of reduction; thus, in the reduction of Wessels ore with 12-16 wt% C, a-Mn and Mn23C6 were formed; when carbon content was above 20 wt%, oxides were reduced to carbide (Mn,Fe)7C3. ?? Kinetic analysis showed that mass transfer of intermediate CO2 from oxide to graphite in carbothermal reduction in inert atmosphere was a contributing factor in the rate control. ?? High rate of reduction of manganese oxide in hydrogen was attributed to formation of methane which facilitated mass transfer of carbon from graphite to oxide. Hydrogen was also directly involved in reduction of manganese ore reducing iron oxides to metallic iron and higher manganese oxides to MnO. Reduction of Wessels and Groote Eyland Premium Fines ores in the solid state is feasible at temperatures up to 1200C; while temperature for solid state reduction of Groote Eyland Premium Sands is limited by 1100C.

Jane G, first appeared as a series in Solidarity, the mouthpiece of the Cape Action League. The series was read by activists in community, student, youth and worker organisations. At the request of readers, the Cape Action League decided to publish the series as a booklet. The book is written in easy English in order for it to be used by workers and their allies as an instrument for active struggle against all forms of oppression and exploitation. The story of Jane G has its roots in the daily experiences of an ordinary black working mother living in South Africa/Azania. She is the mother you meet at the bus stop, meet in the taxi, talk to at the corner shop or prayer meeting. In this series, Jane G’s struggle is typical of the millions of workers suffering a similar fate in our country. Jane speaks of the hardship she faces under the exploitative cycle of earning low wages and paying high rents. The burden of working long hours and paying high prices for basic food in order to look after her family. She finds relief by joining the Clothing Workers’ Union which organises workers at the Rex-Tex factory where she works.

Black people live and work in very poor conditions in South Africa. They have always protested and resisted this. But at the beginning of this century, these protests were limited to a few groups of workers at any one time. There was no organisation for black workers. Then, soon after the First World War ended, a new movement appeared. It spread through the land like a veld fire. The people began to talk of their liberation, their new leaders and their organisation - the Industrial and Commercial Union (the I.C.U.). As a farm labourer from Standerton said: "Man we thought we were getting our country back through Kadalie".

This is a historical study of AWG Champion, the former leader of the Industrial and Commercial Workers' Union (ICU) and provincial President of the African National Congress, in the politics of Zululand and Natal from 1965 to 1975. The study examines the introduction of the Zulu homeland and how different political forces in that region of South Africa responded to the idea of a Zulu homeland during the period under review. It also deals with Champion's political alienation from the ANC. This dissertation is also a study of the development of Zulu ethnic nationalism within the structures of apartheid or separate development, the homelands. Issues running throughout the study are the questions of how and why Champion tried and failed to manipulate `separate development' in order to build a Zulu ethnic political base. / History / M.A. (History)

This is a historical study of AWG Champion, the former leader of the Industrial and Commercial Workers' Union (ICU) and provincial President of the African National Congress, in the politics of Zululand and Natal from 1965 to 1975. The study examines the introduction of the Zulu homeland and how different political forces in that region of South Africa responded to the idea of a Zulu homeland during the period under review. It also deals with Champion's political alienation from the ANC. This dissertation is also a study of the development of Zulu ethnic nationalism within the structures of apartheid or separate development, the homelands. Issues running throughout the study are the questions of how and why Champion tried and failed to manipulate `separate development' in order to build a Zulu ethnic political base. / History / M.A. (History)