Electrochemical and metallurgical industry . n out of the siliciousshell, the furnace charge is apt to form scaffolds on the wallsof the furnace. The slags produced in the converting of cop-per mattes are necessarily basic, and are specially adapted todissolve those accretions. The inventors pour the corrosiveconverter slags, when molten, into the blast furnace, and dis-tribute the same around the walls, thus dissolving all trouble-some accretions and at the same time furnishing additionalheat. E. W. Lindguist (789,160, May 9) describes details ofapparatus for feeding and distributing the molt
Electrochemical and metallurgical industry . n out of the siliciousshell, the furnace charge is apt to form scaffolds on the wallsof the furnace. The slags produced in the converting of cop-per mattes are necessarily basic, and are specially adapted todissolve those accretions. The inventors pour the corrosiveconverter slags, when molten, into the blast furnace, and dis-tribute the same around the walls, thus dissolving all trouble-some accretions and at the same time furnishing additionalheat. E. W. Lindguist (789,160, May 9) describes details ofapparatus for feeding and distributing the molten converterslag into the furnace. Wet Process.—G. Gin (793,186, June 27), best known by hiswork in electrometallurgy, has devised a wet process for theextraction of copper from its sulphuretted ores. His schemeis to utilize the sulphurous acid resulting from the roastingof copper ores afterwards for extraction of the copper. Theprocess is based on these three reactions: (1) 3CuO + 3SO= = 3CuS0,, (2) 3CUSO., + CuO = :,. CuSO. + CuSO^. FIG. I. FOR PVIUTIC SMELTING. (3) QuSO:,. = 2Cu -f CUSO4 -f adding these three equations, one gets: 4CuO + 2SO. = 2CU + 2CuSO,which means that one-half of the copper is obtained in themetallic state and the other half in the form of sulphate. Theabove reaction (3) requires heating the solution to 180° pressure. In practice the ore is roasted in such a way KLl-A rK( )( AL AND ,URGK AL INDUSI RV. | III. 8. tliat .ill the sulphide of copper is changed into liioxidc or sul-phate, and all the iron into peroxide. It is then suhniittcd tomethodical lixiviation hy means of a solution of sulphnron>acid. Reactions (i) and (2) take place, while at the sametime iron sulphite and sulphate are fomierl. The saturatedsolution of the cip|)er and iron salts is collected hy means of apump in a copper l»>iler, where it is delivered at a temperatureof i8o. At this temperature the iron sulphite a
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Keywords: ., bookcentury1900, bookdecade1900, booksubje, booksubjectmetallurgy
