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Glavni namen diplomskega dela je predstavitev in primerjava različnih flokulantov in njihovega vpliva na sedimentacijo trdnih delcev v suspenziji. V uvodnem in osrednjem delu so predstavljeni različni načini čiščenja tehnološke vode, način priprave mineralne surovine in opis postrojenja pralnice in klasirnice za nadaljnje bogatenje pridobljene rude. Bolj podrobno je opisan način čiščenja tehnološke vode po pranju mineralnih surovin kalcita in apnenca s pomočjo flokulacije. V kamnolomu Stahovica, se iz tehnološke vode s pomočjo flokulacije in sedimentacije trdni delci ločijo od tekoče faze, ta pa se zaradi zaprtega krožnega sistema ponovno uporabi za pranje mineralne surovine. V eksperimentalnem delu smo primerjali vpliv štirih različnih flokulantov. Prva dva flokulanta sta bila odvzeta iz kamnoloma Stahovica (anionska), druga dva pa iz kamnoloma Marmor Sežana (kationska). S pomočjo sedimentacijskih testov po metodi Kyncha smo v suspenziji odčitavali položaj trdne faze v odvisnosti od časa in tako videli vpliv različnih flokulantov na delce v tehnološki vodi. Sklepna ugotovitev je, da na sedimentacijo s pomočjo flokulantov vplivata vstopna koncentracija trdne faze in temperatura tehnološke vode, koncentracija in vrsta pripravljenega flokulanta, njegovo doziranje, skladiščenje in starost. The main purpose of the thesis is the presentation and comparison of different flocculants and their influence on the sedimentation of solid particles in suspension. In the introductory and central part, various ways of cleaning technological water, the method of preparing mineral raw materials, and also the description of the washing plant and classification plant for further enrichment of the extracted ore are presented. The method of cleaning technological water after washing the mineral raw materials calcite and limestone with the help of flocculation is described in more detail. In the Stahovica quarry, solid particles are separated from the liquid phase using flocculation and sedimentation. In the experimental part, we compared the influence of four different flocculants. The first two flocculants were taken from the Stahovica quarry (anionic), and the other two from the Marmor Sežana quarry (cationic). With the help of sedimentation tests according to the Kynch method, we read the position of the solid phase in the suspension as a function of time and thus see the influence of different flocculants on the particles in the technological water. The conclusion is that sedimentation with the help of flocculants is influenced by the inlet concentration of the solid phase and the temperature of the process water, the concentration and type of prepared flocculant, its dosage, storage and age. |
