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Iraq's oil industry is the country's main source of income. Iraq's manufacturing sector has always been heavily dependent on the country's oil exports. Since the end of the Iraq War, Iraq has expanded its output and is currently the region's second-largest producer. For this investigation, the grey model was run using data on the monthly international price of Iraqi oil from October 2020 through September 2022. Researchers evaluated the MAPE and accuracy rate to choose which model to employ for oil price forecasting, and we found that the GM(2,1) model was the best fit for capturing the dynamics of the Iraqi oil market (precision rate = 96%, MAPE = 4%).

The rapid development of industry increases the demand and importance of chromium. In this study, beneficiation possibilities of the representative chromite ore taken from the Tokat Province with a laboratory type jig, spiral concentrator, shaking table and multi gravity separator (MGS) were investigated. Appropriate particle size fractions were fed into each beneficiation device. Experimental studies were shown as a flow chart. The shaking table gave the best results for chromite beneficiation and a concentrate of 47.02% Cr2O3 grade and 94.29% recovery were obtained by using a -0.3+0.106 mm particle size fraction. It was observed that concentrates with saleable grade could be obtained as a result of the beneficiation of chromite ore with a spiral concentrator. The tailings obtained from the jig, spiral concentrator and shaking table were blended and scavenger experiments were carried out with an MGS to recover the remaining chromite in the tailings. 93.55% of the chromite in this blended sample was recovered with a grade of 34.96% Cr2O3. Hence, MGS seems to be the promising equipment for the beneficiation of tailings., Brzi razvoj industrije povećava potražnju i važnost kroma. U ovoj studiji istražene su mogućnosti oplemenjivanja kromitne rude iz provincije Tokat s laboratorijskim tipom plakalice, spiralnim koncentratorom (žlijebom), koncentracijskim stolom i više gravitacijskim separatorom (MGS -Multi gravity separator). Kao ulazni materijal svakog uređaja za oplemenjivanje korištene su frakcije odgovarajuće veličine čestica. Eksperimentalne studije prikazane su dijagramom toka. Najbolji rezultati postignuti su oplemenjivanjem kromitne rude na koncentracijskom stolu, pri čemu je preradom materijala granulacije -0.3+0.106 mm ostvarena kvaliteta koncentrata od 47,02% Cr2O3 uz iskorištenje od 94,29%. Rezultati ispitivanja također pokazuju da se oplemenjivanjem kromitne rude u spiralnom žlijebu može proizvesti koncentrat kvalitete koja omogućuje njegovu prodaju. Jalovina dobivena oplemenjivanjem u plakalici, spiralnom koncentratoru i na koncentracijskom stolu pomiješana je i zatim su s tom jalovinskom smjesom provedeni testovi u MGS-u kako bi se iz nje izdvojio preostali kromit. Iz tog miješanog uzorka izdvojeno je 93,55% kromita s udjelom Cr2O3 od 34,96%. Stoga se čini da je MGS obećavajuća oprema za oplemenjivanje jalovine.