A Study on the Metallurgical Characteristic of Hammer Scale Produced through Traditional Iron-making Experiments

This study attempted to investigate the metallurgical characteristic through material scientific analysis of hammer scale produced as a direct smelting method restoration experiment for each raw material of iron. To this end, four hammer scale groups were set up, respectively, by experimenting with Gyeongju-Gampo Iron sand and Yangyang Iron ore. For the analysis, principal component analysis, compound analysis, microstructure observation, and chemical composition were confirmed. As a result of principal component analysis, as forging and refining progressed, the content of Fe increased and the content of non-metallic objects decreased. As a result of compound analysis, iron oxide-based compounds were identified. As a result of confirming microstructure and chemical composition, Wüstite and Fayalite were observed overall, and agglomerated Wüstite were observed in some. Magnetite on shape of polygon and pillar was observed. In addition, it was confirmed that internal defects, impurities, and non-metallic interventions gradually decreased. In the future, it is necessary to investigate the metallurgical characteristic through material scientific analysis of hammer scale produced through restoration experiments using various raw material of iron, and compare them with those excavated from Iron manufacture ruins.

Effect of Stirring Time on Sodium Silicate Synthesis From Mount Kelud Volcanic Ash

This study performed the synthesis of sodium silicate from the volcanic ash of Mount Kelud with various stirring time in the sodium silicate synthesis process. Synthesis of sodium silicate was carried out using alkaline extraction at low temperature. This method is based on the solubility of silica under alkaline conditions and is proven to be more effective than the smelting method. The dissolution of silica contained in the volcanic ash of Mount Kelud was carried out using NaOH solution to form a Na2SiO3 solution. This process also studied the effect of stirring time on the amount of dissolved silica, with the stirring time of 0.5; 1; 1.5; 2; 2.5; 3 and 4 hours. The dissolved silica levels were tested using AAS. The amount of dissolved silica increased sharply with the longer length of stirring time, however for a stirring time of more than 2.5 hours, the dissolution was slow. The study revealed that the optimal result time was obtained from the stirring time of 2.5 hours with dissolved silica content of 19.82%. Keywords: volcanic ash, silica, sodium silicate, stirring time

Extraction and applications of aluminum hydroxide from bauxite for commercial consumption

Bauxite ore was collected from Khyber Pakhtun Khawa (KPK), Pakistan for extraction of aluminum in the form of aluminum hydroxide. The ore consists of 31.11% aluminum and other minerals (SiO2, Fe2O3, Na2O, CaO) was leached with alkaline solution. The aluminum extraction in the form of aluminum hydroxide from the clear solution in filtrate was successfully done by different processes involving autoclave, centrifuge and solvent extraction while the red mud in the form of residue was separated and recycled. The recycling process of iron from red mud was divided into roasting magnetic recovery, the reducing smelting method for iron separation. After extraction the composition of Al, Fe, Si, and Ca were determined from aluminum hydroxide and red mud both by chemical and spectrophotometric analysis. The compound was further characterized by FT-IR and results showed that a considerable amount of aluminum in the form of aluminum hydroxide was extracted along with other minerals.

Pengaruh konsentrasi air dalam formula salep minyak cengkeh (syzigium aromaticum)

The clove flower essential oil (Syzygium aromaticum) with the active compound eugenol has been widely investigated and is known to be efficacious as an anti-inflammatory agent, and further research on its formulation continues. The formula developed in this study was a topical ointment dosage form using a water soluble base (oleic acid enhancer and propylene glycol). This study aims to determine the physical and irritant properties of the clove flower essential oil ointment (MABC) if a hydrocarbon base is used. The ointment is made by the smelting method with a concentration of 5% (F1), 10% (FII) and 15% (FIII). The ointments of the three formulas were then evaluated for their physical properties, including dispersion, adhesion and pH. The results of statistical tests with the LSD test showed that there were significant differences between formulas. The higher the concentration of MABC, the greater the spread (p0.05). The results of the Simplex Lattice Design irritation test also show that water-soluble base ointment with a concentration of 5%, 10% and 15% MABC does not cause an irritating effect. Keywords: Syzygium aromaticum, base of water soluble ointment, anti-inflammatory.

EVALUASI SIFAT FISIK SEDIAAN SALEP MINYAK CENGKEH (SYZIGIUM AROMATICUM) DALAM BASIS LARUT AIR

The clove flower essential oil (Syzygium aromaticum) with the active compound eugenol has been widely investigated and is known to be efficacious as an anti-inflammatory agent, and further research on its formulation continues. The formula developed in this study was a topical ointment dosage form using a water soluble base (oleic acid enhancer and propylene glycol). This study aims to determine the physical and irritant properties of the clove flower essential oil ointment (MABC) if a hydrocarbon base is used. The ointment is made by the smelting method with a concentration of 5% (F1), 10% (FII) and 15% (FIII). The ointments of the three formulas were then evaluated for their physical properties, including dispersion, adhesion and pH. The results of statistical tests with the LSD test showed that there were significant differences between formulas. The higher the concentration of MABC, the greater the spread (p0.05). The results of the Simplex Lattice Design irritation test also show that water-soluble base ointment with a concentration of 5%, 10% and 15% MABC does not cause an irritating effect. Keywords: Syzygium aromaticum, base of water soluble ointment, anti-inflammatory.

Optimasi sediaan salep minyak cengkeh (syzigium aromaticum) dalam basis larut air

The clove flower essential oil (Syzygium aromaticum) with the active compound eugenol has been widely investigated and is known to be efficacious as an anti-inflammatory agent, and further research on its formulation continues. The formula developed in this study was a topical ointment dosage form using a water soluble base (oleic acid enhancer and propylene glycol). This study aims to determine the physical and irritant properties of the clove flower essential oil ointment (MABC) if a hydrocarbon base is used. The ointment is made by the smelting method with a concentration of 5% (F1), 10% (FII) and 15% (FIII). The ointments of the three formulas were then evaluated for their physical properties, including dispersion, adhesion and pH. The results of statistical tests with the LSD test showed that there were significant differences between formulas. The higher the concentration of MABC, the greater the spread (p0.05). The results of the Simplex Lattice Design irritation test also show that water-soluble base ointment with a concentration of 5%, 10% and 15% MABC does not cause an irritating effect. Keywords: Syzygium aromaticum, base of water soluble ointment, anti-inflammatory.

Reductive-sulfurizing smelting treatment of smelter slag for copper and cobalt recovery

Recovery of copper and cobalt from smelter slag using reductive-sulfurizing smelting method was performed in this study. The effects of reductive agent (coke), sulfurizing agent (pyrite), slag modifier (CaO) and smelting temperature and duration on the extractive efficiencies of Cu, Co and Fe were discussed. The phase compositions and microstructure of the materials, copper-cobalt matte and cleaned slag were determined. The results showed that copper and cobalt contents in cleaned slag could decrease averagely to 0.18% and 0.071% respectively after cleaning. 91.99% Cu and 92.94% Co and less than 38.73% Fe were recovered from the smelter slag under the optimum conditions: 6 wt.% coke, 20 wt.% pyrite and 6 wt.% CaO addition to the smelter slag, smelting temperature of 1350?C and smelting duration of 3h. The addition of CaO can increase the selectivity of Co recovery. The cleaning products were characterized by XRD and SEM-EDS analysis. The results showed that the main phases of copper-cobalt matte were iron sulfide (FeS), geerite (Cu8S5), iron cobalt sulfide (Fe0.92Co0.08S) and Fe-Cu-Co alloy. The cleaned slag mainly comprised fayalite (Fe2SiO4), hedenbergite (CaFe(Si2O6)) and magnetite (Fe3O4).

Research on the Effect of High-Temperature Melting β-SiC by Raw Materials and Power Supply

Using high quality carbon raw material,high quality silica raw material , the β-SiC powder are prepared by high-temperature vacuum smelting method. The effects of different materials and electrical power to the product of β-SiC quality has been studied. The microstructure and phase analysis of β-SiC powder samples were observed by Scanning Electron Microscopy and X-ray diffraction. The result shows that the raw materials are better, the product quality are better. In addition, the result also indicates that the β-SiC powder have better quality when the power are 3000W.