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Thong tin khoa hpc cong nghg m THIET KE CHE TAO HE THONG DO TY TRONG HUYEN PHU MANHETIT BAIVG PHiroivG I'IIAP n o mtiN CAM cu6»r DAY At present, the density measurement methods have KS PHAIV1 VAN Hl£U KS NGUYEN HDNQ SON been used at the coal preparation plants and of which, the radioactive measurement method has been commonly Vl^n Khoa hpc Cdng nghf Md - Vinacomin applied with the accurate measuring results and special manufacturing requirements The paper introduces the design and manufacture of the magnetite suspension density measurement system with the inductance coil Gio'i thi^u chung Hi^n nay, ngirai ta si> dyng cac phuang phcip ty dya tren nguyen ly c^n tree, dang ap suit vi sai bSng phong xa, Trong do, bang phong xa dang du'O'c sCr dgng nhieu nhat Dang cho chinh xac cao va on djnh nhu'ng gia dat va co yeu cau che tao d^c biet Cac he dang can treo, ap suat vi sai thu'o'ng diing de a nhOng vj tri dung dich huyen phu tyong del tmh, cac vj tri di^tyc khuciy dong lien tgc, thiet bi lam viec khong 6n dinh Ca Viet Nam, chd y^u si> dung cong ngh$ tuyin mahetit va de phii hp'p vol dieu ki$n che tao thilt bi a Viet Nam, Chung toi Iga chpn thilt k l c h i t?o may huyin phii mahetit dya tren nguyen 1;/ d^ng dien cam Nguyen ly niiy chf xac djnh dygc phlln manhetit co tir tinh dung dich, ph^n ty biin va than l l n dung djch khong xac djnh dyo'c chinh xac Tuy nhign, phlln manhetit la chi s6 quan trpng cong ngh$ tuyin huyIn phii manhetit, xac djnh chinh xac phin se hS trc v i n h^nh hi^u qua giam thit thoat than T h i l t k l , c h l t ^ o v ^ l i p d$t h$ thang 2.1 Nguyen tac ty trgng huyen phu bang cugn day Manhetit la mpt lo^il khoang vat vol phin chO y l u Fe304 ehilm tren 90%, ngoai nd chira cac loai khoang vat khac nhy Cu, S, FezOi, FS, FeO do, manhetit co dp tir tinh r i t cao Mot nhOng irng dung phi biln cua manhetit la diing cong nghe tuyin than Qu|ng mahetit dyo'c nghien bot mjn, sau du'O'c hoa vol n y i c d l t?o dung djch huyIn phii manhdtit Ty trpng cua dung djch quyit djnh hi#u s u i t cua tuyin than nude, g i i trj ty trgng manhStit th6ng thuffng du'O'c d j t dai 1,5 - 2,2 g/cmMiiy theo d i e tinh than v4 cdng ao?n t u y i n Do c6 tif tinh cao nen ty huyIn phii (g/cm') c6 t h i du'O'c tinh dya theo quan h# phu thu$c giu'a ty tripng manhetit I n g v4 dO t y cam ciJa cu$n dSy q u I n quanh I n g Cdng thu'c tinh dp KHCNM S(3
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