Investigation and Comparison of the Enrichment Potential of Turkey (Şenkaya, Erzurum) Coals with Knelson Concentrator

Oyku Bilgin

doi:10.1155/2019/9036047

Abstract

The quality of coals from, Erzurum varies widely. Two coal samples from this area were compared. The first has a composition of 19% ash, 5700 kcal, and 3% sulfur while the other has 49.20% ash, 3000 kcal, and 1.6% sulfur composition. It is understood that the first coal sample is a high-quality coal. Although the ash content of the second coal sample is determined to be high and the calorie value is low, the low sulfur content is advantageous for the environment. This study aimed at increasing the quality of coal samples by carrying out experiments for reducing the ratio of ash and sulfur with Knelson’s enrichment processes. Chemical analysis, sieve analysis experiments, %ash, %moisture, and %calorie values of each fraction are determined from two different C1 and C2 coal samples taken from the Balkaya village belonging to Şenkaya, Erzurum. Then, %ash, %yield, and %sulfur analyzes were carried out on the coal samples using the Knelson gravity separator enrichment method, and the results were evaluated for coal samples.

Highlights

Introduction eKnelson concentrator is a vertical axis bowl-type centrifugal concentrator that uses a fluidized bed to perform its concentrating duty
Once these spaces are full of solids, the introduction of further feed material starts the sorting stages, where heavy minerals displace the light minerals and as a result, the heavy minerals are trapped in the interriffle spaces while the lighter minerals are carried by water to the top of the unit; separation occurs
Coal samples taken from the Erzurum/Senkaya region have been subjected to enrichment processes with ore preparation and Knelson gravity concentrator separator

Summary

Oyku Bilgin

Received 3 November 2018; Revised 21 December 2018; Accepted 10 January 2019; Published 3 February 2019. E Knelson continuous variable discharge (CVD) concentrator was developed to address specific mineral recovery applications which are amenable to enhanced gravity separation but, due to the comparatively high content of the target mineral, are not practical for conventional batch-type concentration methods. E advantages of CVD include the following: it can achieve effective ash and sulfur rejection in fine coal streams utilizing patented fluidized bed technology in an enhanced gravity centrifuge; it may replace cyclones, spirals, and flotation; it can increase fine coal yield and maintain coal specification in the fine fraction (−1 mm), and the CVD can handle high tonnage in a small footprint (up to 100 tonnes/hour in a single CVD); it uses no reagents thereby minimizing environmental concerns; it can be accurately optimized to achieve desired separation results; and it provides high operational availability at minimal cost. When the results are examined; 49.20% ash value in the size of feed sample and 49.17% ash value in the second highest −1+0.5 mm grain size were obtained. e lowest ash content

Dry base

Methods

Conclusions

Findings

Feed sample