High quality
titanium ingot is produced by using recovered
titanium scrap as a
raw material and adding additives.
Scrap, each having individual information of identification and process profile information, is passed through automatic reading means to obtain the information and to store it in a data
server. A calculating means calculates a combination of the
scrap,
titanium sponge and additives and feed rate of each of them so as to satisfy
chemical composition and producing rate of a target
ingot product using the individual identification pieces of information stored in the data
server, during a beginning step of the
ingot production, and transmits electrical signals corresponding to calculated results of the combination and the feed rates from the calculating means to a feed rate controlling means of each feed means of the titanium
scrap, titanium
sponge, and additives and then starting supply of them, and detecting means equipped at an extracting part of the ingot product reads actual producing rate of the ingot product, after the beginning step of the ingot production. The calculating means controls feed rate of the titanium scrap, titanium
sponge, and / or additives based on the actual producing rate.