Adjusting the melting and crystallization behaviors of ferronickel slag via partially replacing of SiO by BO for mineral wool production.

Utilization of ferronickel slag as a raw material for mineral wool production not only conserves natural resources, but also achieves the sustainable development for the ferronickel industry. In order to utilize the ferronickel slag more efficiently, the melting and crystallization behaviors of the slag with the partial replacement of SiO by BO were investigated in this paper. The results show that the initial and complete melting temperatures decreased with BO substitution for SiO, which indicates that the addition of BO can reduce the energy consumption during the melting process.

Evaluation of particle penetration factors based on indoor PM removal by an air cleaner.

The particle penetration factor is an important parameter to determine the concentration of indoor particles. In this paper, a mathematical model for calculating this parameter was established by combining with the decay of the indoor PM and CO concentrations measured in a bedroom with an air cleaner. The convergence of the penetration factors was analyzed under different working conditions.

Study on the durability of concrete with FNS fine aggregate.

As a by-product of nickel production, the ferronickel slag (FNS) puts a lot of pressure on the environment. It is becoming more and more urgent to deal with the increasing FNS. The aim of this study is to explore the durability of concrete with FNS fine aggregate.

Selective recovery of chromium from ferronickel slag via alkaline roasting followed by water leaching.

Chromium was selectively recovered from ferronickel slag by roasting the slag with addition of NaO, followed by water leaching. The thermodynamic analysis revealed that in the presence of NaO at appropriate temperatures, the CrO in the ferronickel slag can be converted to NaCrO, instead of NaCrO, which prevents the formation of highly toxic Cr (VI). The experimental results confirmed that under the optimal alkaline roasting and water leaching conditions of the mass ratio of ferronickel slag to NaO of 1, roasting temperature of 600 °C, roasting time of 1 h, leaching temperature of 50 °C, leaching time of 1 h, and liquid-to-solid ratio of 10 mL/g, 92.

Two new species of from Hainan, China.

Two new species of the genus , and , were described using combined morphological and DNA sequence data. The DNA sequences of respective strains including nuclear ribosomal DNA genes (nuSSU, ITS, nuLSU) and fragments of three protein-coding genes (ACT1, BT2, TEF1) were sequenced and compared with those from closely-related species to genera and (Family Sympoventuriaceae, Order Venturiales). Morphologically, both species showed typical ampulliform conidiophores and conidiogenous cells, features not seen in other species of .