In the manufacture of titanium alloys, the operation of adjusting the composition of the titanium alloy is called alloying, which includes the alloying of the titanium solution in the electric furnace and the fine adjustment of the alloy composition of the titanium solution in the later stage of the refining process. The alloying of titanium rods produced by the traditional smelting process electric furnace is generally in the later stage of oxidation, pre-alloying before recovery, and fine-tuning of the alloy composition during the late stage of titanium production. However, the process of producing titanium rods in modern electric furnaces is generally completed during the titanium extraction process, which is alloyed in the titanium cladding during the titanium extraction process, and the precise alloy composition adjustment is finally completed in the refining furnace. Alloy operation mainly refers to the participation time and the number of participants of the alloy.
Add alloy time. The general principle of participating in ferroalloys in the smelting process is: high melting point, elements that are not easy to oxidize can be added in advance, such as nickel can be added together with the charge, the yield is more than 95%; late additions with low melting point and easy oxidation, such as ferroboron About 50% should be added during the titanium production process.
In addition, the deoxidation operation and the alloy operation cannot be separated from each other. Generally speaking, as a deoxidizer, add it first, then add the alloying elements; the more expensive alloy elements with strong deoxidation properties should be added when the titanium liquid is well degassed. For example, the order and purpose of the participation of easily oxidizable elements should be: 2~3min before titanium extraction, aluminum deoxidation 2~3min, titanium fixes nitrogen, and boron is added during the titanium extraction process, and the recovery rate is high. In this case, the three-month usage rate is 65%, 50%, and 50% respectively.
A number of participants.
The chemical composition in the smelting project has a great influence on the M value and effect of titanium. According to the smelting conditions, the type of titanium liquid in the furnace, the titanium content in the furnace, the composition in the furnace, the alloy composition, and the alloy recovery rate are fast and accurate. Accounting.
The main applications of high carbon content in electric furnace batching are:
In the smelting process, during the smelting process, in the oxygen blowing process, the carbon is first oxidized by iron, and then the burning loss is reduced.
Infiltration can reduce the melting point of waste titanium and accelerate the melting.
(3) Carbon-oxygen reaction forms molten pool stirring, which promotes the reaction of slag-titanium, which is beneficial to early de-powdering.
(4) During the heating process, the activated carbon-oxygen reaction expands the slag-titanium interface, which is beneficial to further dephosphorization, is beneficial to the homogenization of the composition and temperature, and makes the gaseous state uniform and the increase of the inclusion.
(5) The carbon-oxygen reaction promotes the formation of foamed slag, promotes thermal conductivity, and speeds up the healing process.
The amount of carbon and the method of adding, the method of oxygen blowing, the intensity of oxygen supply have a great relationship with the power of the furnace, and it needs to be judged according to the actual situation.
