The current situation of mineral separation research of domestic hematite
Each academy place are opposite home hematite mineral separation has undertaken study, but the craft of hematite mineral separation with institute of company of mining industry of hill of saddle of saddle steel group is most successful, reached the level with banner international.
In recent years, because steely product requirement measures increase sharply, iron ore resource becomes particularly important, natural resources of our country iron ore is very substantial, but what the deficient hematite that chooses hard holds proportion very big. Saddle steel is our country's important steely base, undertake ceaselessly as what large-scale industry extracts, the crop of deficient hematite will occupy the 50% above of total output. Company of saddle hill mining industry is to look the iron and steel with pommel main steel supplies base, manufacturing iron ore basically is the deficient hematite that granule embeds cloth.
Be aimed at saddle country region in last few years ore dressing plant of hematite of 3 big deficient, namely sintering plant of ore dressing plant of ore dressing plant of neat big hill, tone army station, Dong Anshan undertook mineral separation experiment studies, undertook large-scale technical reformation to ore dressing plant of neat big hill and Dong Anshan sintering plant among them, make new deficient hematite technological process is able to carry out. Ore dressing plant of neat big hill uses level to grind mine, one magnetic separation turns over reelect floatation flow, station ore dressing plant uses tone army to grind mine continuously, one strong magnetism turns over weak magnetism floatation flow, hill sintering plant uses saddle to grind mine continuously east, mine is ground again in, one magnetic separation turns over reelect floatation flow. Manufacturing practice makes clear, the technological process of these 3 ore dressing plants, all obtained favorable technical economy result.
Hematite of deficient of saddle country region is given priority to with hematite and false appearance hematite, quartzite of magnet of metamorphism of deposit of the Sinian Period before all be being fastened or hematite one magnetite quartzite, ore body is large big, reserve is substantial, upper oxidation rate is later, and deep transfers gradually magnetite. The chemical composition of ore is very simple, main element is iron and silicon, other is harmful foreign matter is very little, ore grade is 25% ～ commonly 30% between change, belong to quartzite of magnet of hematite of deficient of phosphor of tall silicon low sulfur. Ore is main the metal is mineral for hematite, false appearance hematite, spiegeleisen mine and a few siderite; Gangue mine owner should be quartz, have additionally a few amphibole, tremolite, the silicate such as chlorite is mineral. A few ore crystallization granuality are fine, show granule inhomogenous embed cloth. Iron ore content most greatly L.Omm, the smallest for 0.005mm, distributing commonly between 0.3mm ～ 0.04mm.
Technological process of ore dressing plant of neat big hill reachs main craft target. After raw ore grinds mine to classification via a paragraph, overflow flows via hydraulic Xuan implement thick fractionize class, thick bead product by processing, granule is fastened via weak magnetism, strong magnetic separation, the essence that mix magnetism combats surplus
Anthology. Both of thick, granule all yields final concentrate. End of reelect essence snail and the essence of the magnetism in sweeping after the magnetism in sweeping snail essence classics are ground again return hydraulic Xuan to flow implement. End of the magnetism in sweeping, strong magnetism end and turn over floatation gangue to incorporate for integrated gangue. Choose integratedly fasten index to be iron concentrate grade 67.50% , the metal reclaims rate 75.00% .
Move technological process of army station ore dressing plant and main technology index. Raw ore grinds mine continuously via two paragraphs, after weak magnetic separation of 2 overflow classics and strong magnetic separation, both constitutes the essence of life that mix magnetism, the essence that mix magnetism turns over the concentrate of floatation to serve as final concentrate; After weak magnetism gangue condenses, cast remaining part via strong magnetism machine, mine of strong magnetism tail and turn over floatation gangue to comprise integrated gangue. Choose integratedly fasten index to be iron concentrate grade 67.50% . The metal reclaims rate 75.00% .
Technological process of saddle hill sintering plant reachs main craft target east. Raw ore grinds mine continuously via two paragraphs, 2 times overflow flows via hydraulic Xuan implement auxiliary after classificationing, thick bead product is chosen by helix chute not, granule is fastened via weak magnetism, strong magnetic separation, mix concentrate to turn over floatation. Both of the product that hire bead, granule product all yields final concentrate. End of reelect essence snail and concentrate of the magnetism in sweeping are ground again return hydraulic Xuan to flow implement. End of gangue of the magnetism in sweeping, strong magnetism and turn over floatation gangue to incorporate for integrated gangue. Choose integratedly fasten index to be concentrate grade 64.50% , the metal reclaims rate 65.00% .
Tang Gang manages domestic run iron ore is our country existent scale is larger have not one of large mine that extensive development uses. As a result of the severe shortage of iron concentrate, tang Gang decides: Quicken the exploitation pace of iron ore of department home run. Get preparatory group of iron ore of run of home of department of county of Tang Gang Luan entrust, academy of company of mining industry of hill of saddle of saddle steel group undertook to iron ore of department home run mineral separation experiment studies, acquired good target.
Iron ore of department home run belongs to iron ore of saddle hill type, for deposit and degenerative cliff, the shallow-layer is given priority to with bare iron quartzite, depth transfers for magnet quartzite. Ore composition is relatively simple, iron ore owner should be hematite, second for false appearance hematite, magnetite; Gangue is mineral give priority to with quartz, it is actinolite, Shan Shi next body of mineral apatite wrap up reachs a few common amphibole and picrite to wait. Among them the average size of iron ore content is controlled for 0.06mm, the average size with mineral gangue is 0.08mm left and right sides. Grind mine degree of finish to classification through “ phase, reelect one anion turns over one strong magnetism the experiment research of floatation ” craft, in selected grade the circumstance of 29.14% falls, obtained concentrate grade 66.57% , gangue grade 8.87% , the metal reclaims lead the better outcome of 80.24% .
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