امكان سنجي جدايش ذرات ريز كوارتز و هماتيت به روش فلوتاسيون حامل

feasibility study of fine quartz and hematite seperation by carrier flotation

اﯾﻦ ﺗﺤﻘﯿﻖ ﺑﺮاي دﺳﺘﯿﺎﺑﯽ ﺑﻪ ﺳﺎز و ﮐﺎر و ﺷﺮاﯾﻂ ﺑﻬﯿﻨﻪ ﺑﺮاي ﺟﺪاﯾﺶ ذرات رﯾﺰ (μ 38-) ﮐﺎﻧﯽ ﮐﻮارﺗﺰ )ﺷﻨﺎور( از ﮐﺎﻧﯽ ﻫﻤﺎﺗﯿﺖ )ﺑﺎزداﺷﺖ(، ﺑﻪ روش ﻓﻠﻮﺗﺎﺳﯿﻮن ﺣﺎﻣﻞ )ﻣﺴﺘﻘﯿﻢ( اﻧﺠﺎم ﺷﺪه اﺳﺖ. در اﯾﻦ ﻣﻄﺎﻟﻌﻪ در اﺑﺘﺪا، اﻧﺘﺨﺎب ﻧﻮع و ﻣﺤﺪوده داﻧﻪﺑﻨﺪي ﻣﻨﺎﺳﺐ ذرات ﺣﺎﻣﻞ ﺑﻪﻣﻨﻈﻮر ﺟﺬب ذرات ﺧﺎﻟﺺ ﮐﻮارﺗﺰ روي ﺳﻄﻮح اﯾﻦ ذرات اﻧﺠﺎم ﺷﺪ. ﺳﭙﺲ، ﺑﺎ اﺳﺘﻔﺎده از آزﻣﺎﯾﺶﻫﺎي ﻣﺘﻌﺪد، ﺗﺄﺛﯿﺮ ﻋﻮاﻣﻞ ﻣﺨﺘﻠﻒ از ﺟﻤﻠﻪ: ﻧﻮع و ﻏﻠﻈﺖ ﮐﻠﮑﺘﻮر و pH در ﺷﻨﺎورﺳﺎزي ذرات ﻣﺤﯿﻂ ﺑﺮ ذرات ﺣﺎﻣﻞ ﺑﺮرﺳﯽ ﺷﺪ. ﺑﺮاي اﻧﺘﺨﺎب ذره ﺣﺎﻣﻞ، ﺗﺄﺛﯿﺮ ذرات ﭘﯿﺮﯾﺖ و ﮐﻠﺴﯿﺖ ﺑﺮ ﺟﻤﻊآوري اﻧﺘﺨﺎﺑﯽ ذرات ﮐﻮارﺗﺰ آزﻣﺎﯾﺶ ﺷﺪ. ﻃﺒﻖ ﻧﺘﺎﯾﺞ آزﻣﺎﯾﺶﻫﺎ، ذرات ﮐﻠﺴﯿﺖ در ﻣﺤﺪوده داﻧﻪﺑﻨﺪي )106- 75+( ﻣﯿﮑﺮون ﺑﻪﻋﻨﻮان ﺣﺎﻣﻞ ﻣﻨﺎﺳﺐ ﺑﺮاي ﺟﺬب و ﺟﻤﻊآوري ذرات رﯾﺰ ﮐﻮارﺗﺰ و ﺳﭙﺲ ﺷﻨﺎورﺳﺎزي آنﻫﺎ اﻧﺘﺨﺎب ﺷﺪ. ﻫﻤﭽﻨﯿﻦ ﻣﺸﺨﺺ ﺷﺪ ﮐﻪ آﻣﺎدهﺳﺎزي ذرات ﮐﻠﺴﯿﺖ ﺑﺎ ﮐﻠﮑﺘﻮر، ﻗﺒﻞ از اﺿﺎﻓﻪ ﻧﻤﻮدن آنﻫﺎ، ﺗﺄﺛﯿﺮ ﻣﺜﺒﺘﯽ در ﺟﺬب ذرات رﯾﺰ ﮐﻮارﺗﺰ دارد. آزﻣﺎﯾﺶﻫﺎ ﻧﺸﺎن داد ﺑﻬﺘﺮﯾﻦ ﺷﺮاﯾﻂ ﺑﺮاي ﺷﻨﺎور ﺷﺪن ذرات ﮐﻠﺴﯿﺖ، در 11/5=pH و ﺑﺎ ﺣﻀﻮر ﮐﻠﮑﺘﻮر دودﺳﯿﻞ آﻣﯿﻦ ﺑﺎ ﻏﻠﻈﺖ 1/5 ﮐﯿﻠﻮﮔﺮم ﺑﺮ ﺗﻦ ﺣﺎﺻﻞ ﻣﯽﺷﻮد. ﭘﺲ از ﺑﺮرﺳﯽ اﺛﺮ ﻣﺘﻐﯿﺮﻫﺎي ﻓﺮآﯾﻨﺪ ﺑﺮ ﭘﺎﺳﺦﻫﺎي ﺑﻪدﺳﺖ آﻣﺪه، ﺑﻬﯿﻨﻪﺳﺎزي ﻋﻮاﻣﻞ ﻋﻤﻠﯿﺎﺗﯽ ﺑﺎ ﻫﺪف ﺑﻪ ﺣﺪاﮐﺜﺮ رﺳﺎﻧﺪن ﻋﯿﺎر و ﺑﺎزﯾﺎﺑﯽ ﮐﻮارﺗﺰ در ﺑﺨﺶ ﺷﻨﺎور ﺷﺪه )ﮐﻨﺴﺎﻧﺘﺮه( ﻓﻠﻮﺗﺎﺳﻮن، اﻧﺠﺎم ﺷﺪ. در ﺷﺮاﯾﻂ ﺑﻬﯿﻨﻪ ﺳﺎﯾﺰ ﺣﺎﻣﻞ )106- 75+( ﻣﯿﮑﺮون و ﻣﻘﺪار آن ﻣﻌﺎدل 34 درﺻﺪ ﮐﻮارﺗﺰ ورودي ﺑﻪدﺳﺖ آﻣﺪ. ﻧﺘﺎﯾﺞ آزﻣﺎﯾﺶ در اﯾﻦ ﺣﺎﻟﺖ ﺑﺎزﯾﺎﺑﯽ ﮐﻮارﺗﺰ در ﮐﻨﺴﺎﻧﺘﺮه ﺣﺪود %71 و ﻋﯿﺎر آن ﺣﺪود 81% از ﯾﮏ ﺧﻮراك ﺳﻨﺘﺰي ﺑﻪ ﻧﺴﺒﺖ 40 درﺻﺪ ﻫﻤﺎﺗﯿﺖ و 60 درﺻﺪ ﮐﻮارﺗﺰ ﺑﻪدﺳﺖ آمد.

This study was carried out to obtain the optimal mechanism and conditions for the separation of fine particles (-38 µ) of quartz (float) from hematite (depression) by direct carrier flotation. In this study, first, the type and size of carrier particles were determined to adsorb pure quartz particles on the surfaces of these particles. Then, the effect of various factors such as the type and concentration of collector and pH on floating particulate matter on the carrier particles was investigated using several experiments. In order to select carrier particle, the effect of pyrite and calcite on the selective collection of quartz particles was tested. According to the results of experiments, calcite particles in the size of (+75 –106) micron were selected as suitable carriers for the adsorption and collection of fine quartz particles and then their floating. It was also found that the preparation of calcite particles with the collector, before adding them, had a positive effect on the adsorption of fine quartz particles. Experiments showed that the best conditions for calcite particles to float at pH = 11.5 with presence of dodecyl amine collector at a concentration of 1.5 kg / ton. After investigating the effect of process variables on the responses obtained, optimization of the operating the aim was to maximize grade and recover quartz in the flotation float concentrate. In the optimum condition, carrier size (+75 -106) micron and amount of 34% quartz was obtained. The optimum results showed that the quartz recovery in the concentrate was about 71% and its grade about 81% of a synthetic feed with a ratio of 40% hematite and 60% quartz.