The Research Of Microfine Hematite Gravity Process Optimization

The emphasis of this paper was located on the investigation of fine hematiteusing gravity concentration technology in the system. Combining microgranular leanhematite properties, identified the two pilot scheme namely all particle for gravityplan and narrow siza for gravity.In the all paricles experiment, confirmed the best concentration of roughing,concentrate, and scavenging was52%,59%and45%of spiral chute, when the concentrations is59%, concentrate grade was64.26%, and the recovery was77.82%.We can know from the classification and test concentrate sample, the grade of oresample size in+0.1mm is low, this was one of the factors lead to all particle forgravity product grade was low.In the narrow size experiment, core sample particle size can be amalgamatedin+0.1mm and-0.1mm~+0.074mm, so as to reduce the workload. The concentrategrade was67.13%and the recovery was77.09%in the index, the recovery rate almost unchanged, iron grade increase3%, compared with test results of all particlesfor gravity, the result of narrow size for gravity test was better.This paper applies the circulation of the fluid mechanics theory, from the threeaspects analyzes of the spiral chute mineral separation mechanism, the three aspectswere gravity, water pressure and centrifugal force. Movement of the particles in thespiral chute mineral friction force, counteacting force and gravity. According to thetheoretical knowledge and experiment, draw conclusions from it. With the differentnature of particles, movement was different. If the size was the same and the specific gravity was different, normal operation shall be continued, otherwise, will getopposite result. The conclusions offer the theoretical basis for the narrow size forgravity test result was better.