하동지역 저품위 티탄철광의 선별 기술 및 선별 공정에 관한 연구

Abstract

Titanium ore of more than 90% is processed goes producing titanium dioxide pigment, which is used as whitening and opacifying agent in the industries of paints, alcquers, plastics, textiles, papers and etc.. and 5% of the world production of titanium minerals goes to make titanium metal which has wide industrial applications in the air craft engines, submarine bodies, marine structures and etc..

In this study, the head ore was taken from Ha-dong mine located in Ha-dong city, Kyunsangnamdo province. The head ilmenite are contains as low as about 6.45% TiO2 and is mainely associated with gangue minerals such as chlorite, albite, tremolite, quartz and magnesiohornblende. The XRF analysis show that the associate minerals have grade of about 43.14% SiO2, 11.24% Al2O3, 24.13% Fe2O3, 0.35% Na2O, respectively

The target grade of titanium concentrate is determined as high as more then 48% TiO2, which can be acceptable for titanium smelting. The optimum process and conditions to get the high grade ilmenite concentrate are as follow

the pre-concentrate reground to -100mesh, in size, water feed rate 8L/min., sample feed rate 250g/min., slope of table 1.1°, length of table 0.9cm, and strokes of table 150times per min.

3) The intermediate grade ilmenite concentrate of about 44.9% TiO2 is again upgreded to 50.3% TiO2 with 49.1% recovery by using Cross belt magnetic separator at contidions of 4000Gauss magnetic intensity and 20g/min. feed rate.

As a result, it's show that the final ilmenite concentrate of about 50.3% TiO2 which is acceptable goes titanium smelting can be recovered with aboce optimum conditions and process.

1) The head ore containing about 6.45% TiO2 crushed to -5mm in size. can be up graded to 10.4% TiO2, with 98.4% recovery by High-force magnetic separator at conditions of 150RPM Roll speed and Splitter postion at 2.

2) The ilmenite pre-concentrate of about 10.4% TiO2 is again up graded to 44.93% TiO2 with 59.3% recovery by using Shaking Table concentrator at the conditions as followings