Kil Yıkama Tesisi Atıklarından Kuvars Kazanımının Araştırılması
Özet
In this study, experimental studies were carried out to recover quartz from the tailings of an operating clay enrichment plant, and then, by using experimental data and simulation, the flowsheet of this plant was developed and the major equipment to be used was selected.
The size distribution and chemical composition of the samples taken from the waste stockpile at the plant were determined, and gravity concentration and magnetic separation tests were performed. In these studies, it was determined that although clay, coal and the iron originating mostly from siderite was removed to some extent, a product at sufficient quality could not be obtained at coarse sizes.
Since the clay from 16 different quarries was processed in the same facility, the sample used in the enrichment experiments was obtained by accumulating coarse gravel, coarse sand and fine sand samples for one month duration.
At the end of the studies, it was determined that some feldspar remained in the ore, so it was decided that feldspar-quartz separation was necessary to obtain a product with the desired impurity, and feldspar was activated with HF acid and separated from the quartz using an amine-type collector.
As a result of the experiments, the final product composition obtained with -0.5mm material is given below.
Component, % SiO2 Al2O3 Fe2O3 TiO2 CaO MgO Na2O K2O C L.O.I.
-0,5mm 97.49 1.49 0.107 0.054 0.04 0.28 0.06 0.11 0.19 0.32
This composition is of similar or higher quality to many products produced and marketed by Camiş Madencilik, except for the ultra-high purity products.
After the completion of the experimental studies, a plant was designed to enrich 140,000 tons of clay waste material per annum. JKSimMet software was used in the design of the grinding and classification circuit and for the mill sizing. In the enrichment phase, the mass fraction of the products obtained in the laboratory experiments were used. The mass balance of the whole plant was determined with the aid of simulation using JKSimMet.
As a result, it would be possible to recover 61,720 tons of glass quality quartz concentrate and 9,804 tons of fine product from 140,000 tons of waste generated from the clay washing plant. About half of the total waste generated could be recovered as a product, and the amount of waste, that needs to be transported and stored, would decrease at the same extent.
