In order to explore the potential effects of abandoned coal mines on water quality Ordovician limestone aquifers, water-rock interaction simulations were conducted. After closure mine, karst in goaf area and waste gangue had a geochemical reaction, above-mentioned process was simulated by an indoor static immersion experiment differences effect different types dissolution gangue. The basic para...

In this study, coal gangue was used to replace the four single-graded natural gravels of 0~5 mm, 5~10 10~20 and 20~26.5 mm design mix ratio study influence in particle size changes on mechanical properties mixture. The research results show that: maximum dry density mixture with is lower than crushed stone water-stable mixture, optimal moisture content higher that mixture; aggregate mixed cemen...

In this paper, the influence of Ca2+ on the flotation of a skarn type molybdenum ore and pure molybdenite mineral at pH 8 was studied using diesel as the collector. It was found that Ca2+ had little effect on molybdenum flotation at low concentrations. By further increasing Ca2+ concentration, the floatability of molybdenite—especially from the fine size fractions—was depressed even without the...

In this chapter we are concerned with interactions between particles, including air bubbles. Such interactions occurring across aqueous solutions are of special interest Ž since they determine phenomena in mineral processing, including froth flotation Leja, . 1982; Schulze, 1984 . The most important types of colloidal forces will be introduced and discussed together with short descriptions of t...

A newly coal gangue-based geopolymer concrete made from alkaline dry powder activator, gangue, and fly ash has been proposed by the authors. High-temperature behavior of beams with different cross sections reinforced steel bars is investigated in work here. numerical simulation validated existing experiment. analysing section dimensions. Temperature distribution deformation room temperature to ...

The processing mineralogy characteristics of an oxidized lead-zinc ore from Sichuan were studied systematically using numerous modern instruments. Results showed that lead and zinc oxide content in the ore exceeded the minimum industrial grade, and also included a relatively high concentration of silver and iron. This ore is composed of many different minerals. Major zinc-containing minerals in...