Milling practice of the Missouri-Kansas-Oklahoma field as it has developed in the past two years

The writer has limited his subject to deal with the past two years as it is only the past two years that a great deal of research has been done in the field upon milling ideas and practices; but I will briefly give you the evolution of our present milling and concentrating practices by means of the following flow sheets --Page 1

Concentration of ores by flotation

Flotation is a new step in the separation of valuable minerals from gangue. This process has only been in commercial use for about six years. There has been several theories advances as to how the ore is concentrated, and the theory that is now usually accepted is that the oil covers or wets the sulphide mineral particle and does not the gangue; and this mineral particle, by means of induced aid is concentrated on the surface. The authors of this thesis have not attempted to explain the reason or reasons why minerals will float; but have accepted the theories advanced by men far more capable, but we have worked on the assumption that sphalerite, the sulphide of zinc, according to all flotation theory will float, so our problem narrowed down to one fact which can be stated in the one word - How --page 1

How to Introduce Mathematic Modeling in Industrial Design Education

With competency based learning in a project driven environment, we are facing a different perspective of how students perceive mathematical modelling. In this chapter, a model is proposed where conventional education is seen as a process from mathematics to design, while competency driven approaches tend to have an inverted sequence. We assume there is a virtual barrier for on-demand learning with regards to the mathematical modelling layer under the layer of technical skills. Several successful attempts were done in the past to remove the technology skill from the chain in order to make the opportunities of modelling visible. After experiencing the modelling competency in such a setting, students can beneficially deploy it for technology. We evaluated this model based on a learning activity which was changed from traditional education into competency centred learning