Two methods of smelting phosphocopper alloys

The smelting method of phospho-copper alloy, in addition to the non-ferrous alloy factory which produces a large number of phospho-copper using "wet smelting", generally adopt the following two typical processes.

Prepare two graphite crucible, one crucible is baked and cooled thoroughly, put red phosphorus into it, tamp it with a wooden stick, spread dry grass ash on it, tamp it tightly, the thickness is about 50 mm, use! 3~6 mm iron needle from the ash layer down hole, hole depth close to the bottom of the crucible, hole distance to maintain about 15 mm, and then spread a layer of thick 100~200 mm charcoal (grain size of 5~30 mm). Crucible to 1 200~1 250), then poured the copper crucible into the crucible, then sprinkled with straw ash and closed the lid. The crucible was gently shaken for 5-10 min to promote the reaction. After the reaction, the lid was opened, the alloy liquid was mixed evenly, and the slag was raked for pouring.

The red phosphorus and red copper chips (or copper grain & fine copper strip & broken copper, etc.) according to the proportion of evenly mixed into the crucible (crucible by drying processing), with wood hammer after compaction, with yellow mud seal up, in the sealing layer left air hole and then the sealed crucible into the coke furnace, blast melting, melting after the raking ballast pouring. In these two typical processes, the reaction between red phosphorus and copper liquid is relatively stable, but the operation is more difficult. The former process requires preparation of two crucible, and the latter process requires preparation of copper shavings, both of which are labor-consuming.