A molten bath-based direct smelting process comprises controlling the process conditions in a direct smelting vessel so that molten slag in a molten bath of metal and slag in the vessel has a viscosity in a range of 0.5-5 poise when the slag temperature is in a range of 1400-1550 C. in the molten bath in the vessel.

The present invention relates to a method and system for recovering carbonate from steel slag, in which it is possible to extract carbonate from steel slag and reuse the extracted carbonate, and to recycle steel slag and make use of CO.sub.2 gas without emission to the atmosphere. Since unreacted metal ions and an acidic solvent are reused in the method and system, it is possible to increase carbonate extraction efficiency and reduce an amount of waste.

The present invention relates to a method and system for recovering carbonate from steel slag, in which it is possible to extract carbonate from steel slag and reuse the extracted carbonate, and to recycle steel slag and make use of CO.sub.2 gas without emission to the atmosphere. Since unreacted metal ions and an acidic solvent are reused in the method and system, it is possible to increase carbonate extraction efficiency and reduce an amount of waste.

A slag notch for a metallurgical vessel includes a steel member defines a passageway for molten slag and a system for cooling the steel member.

A slag notch for a metallurgical vessel includes a steel member defines a passageway for molten slag and a system for cooling the steel member.

The purpose of the present invention is to provide a method for recovering calcium-containing solid components from steelmaking slag, with which it is possible to easily increase the calcium recovery rate. With the method, steelmaking slag is immersed in an aqueous solution containing carbon dioxide, and calcium in the steelmaking slag is made to leach out into the aqueous solution. Next, the immersed steelmaking slag is removed from the aqueous solution, and, subsequently, the pH of the aqueous solution is increased. When solid components precipitated by doing so are recovered, it is possible to recover solid components containing 20% or more by mass in terms of calcium atoms.

In a method of enhancing the dry grinding efficiency of petcoke including adding additives to the petcoke and dry grinding the petcoke together with the additives. The additives may include a combination of at least one organic additive and at least one inorganic additive.

In a method of enhancing the dry grinding efficiency of petcoke including adding additives to the petcoke and dry grinding the petcoke together with the additives. The additives may include a combination of at least one organic additive and at least one inorganic additive.

The invention relates to a processing method of a battery pack that includes at least a battery body and a resin. The processing method includes a step of covering the battery pack with a slag that is at a predetermined temperature.

The invention relates to a processing method of a battery pack that includes at least a battery body and a resin. The processing method includes a step of covering the battery pack with a slag that is at a predetermined temperature.