| In recent years,with the rapid economic development of Sichuan,promote sustainable urbanization,the construction industry to energy saving and environmental protection requirements,and promote the rapid development of Sichuan glass and ceramic industry.K-feldspar as one of the important raw materials in glass,ceramic industry,market demand increased year by year.In this study,Wudu,Ebian,Sichuan Province inferior K-feldspar ore(secondary sand and tertiary sand general designation),through purification and processing to improve the overall index of feldspar,K-feldspar in order to meet the standard of glass industry,improve the comprehensive utilization and economic value of the.In order to meet the modem environmental protection non-toxic cheap mineral flotation reagents,the focus of this study is to explore the basic conditions of collector separation of feldspar and quartz,looking for a suitable reagent scheme,using magnetic separation,flotation and purification processing of low grade K-feldspar ore.The study sample is Wudu potassium feldspar ore,the ore mining through sizing is divided into 6?15mm high quality of head mine,1-6mm inferior quality ore(The particle size of 3?6mm was secondary sand and The particle size of 1-3mm was tertiary sand),-1mm of tailings(discarded).Agent system to explore the study samples is the 6-15mm head after washing,crushing,sieving ore separation,formation of primary potassium feldspar products,the main chemical components of SiO2 69.49%,Al2O3 16.72%,Fe2O3 0.65%,K2O 8.19%,Na2O 3.03%,the main minerals are quartz,feldspar,albite;containing a small amount of hematite,biotite,chlorite etc..Purification and processing of study samples is 3?6mm secondary sand and 1?3mm tertiary sand.The secondary sand main chemical components of SiO2 73.14%Al2O315.44%?Fe2O31.07%?K2O5.79%?Na2O 3.03%;the main minerals are quartz,feldspar,albite;containing a small amount of magnetite,hematite,biotite,chlorite etc..The tertiary sand main chemical components of SiO2 72.98%.Al2O313.41%.Fe2O3 3.23%?K2O 5.01%?Na2O 2.61%;the main minerals are quartz,feldspar,albite;containing a small amount of magnetite,hematite,biotite,chlorite etc..Through the feldspar and quartz flotation separation experiment showed that the pharmacy tests depend on pH and reagent dosage can not achieve feldspar and quartz isolation of single amine cationic or anionic collector.The dodecylamine(DDA)as cationic collector,sodium oleate(OA)and sodium dodecyl sulfate(SDS)mixed solution as the anionic collector,charge separation of feldspar and quartz in cationic and anionic mixed collector,under the alkaline environment of pH 10.5,DDA:OA:SDS 1:1:1,Grade of SiO2 in K-feldspar products reduced from 69.49%to 67.21%,grade of K20 increased from 8.19%to 8.43%,the yield was 44.62%.It can significantly reduce the grade of SiO2 grade and improve the grade of K2O grade in K-feldspar,and the indicators are more excellent,Extraction of potassium and reduction of silicon from K-feldspar can achieve the ideal effect.That in the alkaline environment with dodecylamine cationic collector flotation process of K-feldspar by condition experiment,the mixed solution of sodium oleate and sodium dodecyl sulfate for the anion collector ions mixed agent collecting agent system,reverse flotation purification of K-feldspar,the optimum anti-flotation process parameters to achieve extraction of potassium and reduction of silicon flotation destination:DDA:OA:SDS reagent ratio is 1:1:1,the total dosage of coagulant is 600g/t;flotation granularity of-0.125mm(-0.075mm<25%);flotation pH 10.5;flotation pulp concentration is 15%;flotation temperature is 25 ?;flotation time lOMin.The grade of SiO2 in K-feldspar products decreased from 69.49%to 67.42%,the grade of K2O increased from 8.19%to 8.45%,the yield was 64.38%.Mention potassium silicon reduction effect is obvious.Through the secondary sand magnetic separation test conditions of this experiment to determine the optimum conditions for the magnetic separation is a magnetic medium diameter of 2.0mm sorting boxes,background field IT(2.0mm sorting boxes corresponding to the magnetic field strength 22,000 Oe),magnetic separation to the ore slurry concentration of 10%,to mine time 30s.Make secondary sand of TFe in raw ore from the 1.07%,1.55%after grinding down to 0.41%.Through study obtained by the optimum magnetic separation process,the optimum float flotation reagent system of secondary sand and tertiary sand magnetic separation,Once flotation,the second selected flotation,can make the grade of SiO2 in the secondary sand raw ore reduced from 73.14%to 69.34%;TFe grade in the raw ore 1.07%after grinding 1.55%lower was 0.17%;K2O+Na2O integrated ore grade increased from 8.82%to 10.40%,51.22%yield comprehensive flotation.Can make the grade of SiO2 in the tertiary sand raw ore reduced from 72.98%to 69.57%;TFe grade in the raw ore 3.23%after grinding 3.76%lower was 0.18%;K2O+Na2O integrated ore grade increased from 8.62%to 10.54%,59.97%yield comprehensive flotation.maglev comprehensive yield 54.51%.then reached the experimental purposes that extractionn of potassium and reduction of silicon.Comparison of K-feldspar glass industry standard:SiO2?70%;Al2O3>16%;Fe2O3<0.2%;K2O + Na2O>10%;after magnetic separation,reverse flotation,the second selection process of secondary sand and tertiary sand purification process optimization and other ore feldspar glass industry has met the standard.But by crushing-magnetic separation-flotation process,feldspar concentrate comprehensive laboratory results in low yields. |
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