I. Treatment of scraps

The technological process for the treatment of scraps is as follows: titanium scraps - crushing - cleaning - drying - screening - removal of high-density metal inclusions - distribution - inspection - packaging and preservation. Chips can be crushed by herringbone gear roller crusher or hammer crusher. The cleaning is carried out on the cleaning machine. The titanium chips cleaned by hot air dryer or electric dryer shall be dried. Titanium chips are screened in a double hole sieve. After screening, the scoop chips are separated by an air separator, and then processed by a high intensity magnetic separator to remove high density metal inclusions (alloy bits mixed with titanium chips, etc.). The titanium scraps are distributed on the distributor, so that the scraps with different compositions and geometric dimensions are evenly distributed. The scrap residue after purification treatment and inspection is the recycled material.

2、 Treatment of blocky residues

Medical titanium rod The process flow of processing blocky residue is: blocky residue - brand identification - fixed length dome cutting/cutting - removal of surface contamination layer - inspection - packaging and storage.

(1) Brand identification. Eddy current conductivity meter, steel mirror, mobile coriander spectrometer, etc. are used to identify the blocky residue, which can quickly distinguish pure titanium and alloy, and determine the elements contained in the gold residue. The mobile direct reading spectrometer can also directly and accurately measure the bit element content

(2) Fixed length cutting/cutting adopts plate shears, crocodile shears and other cutting methods or self cutting with fire.

(3) Alkali cleaning or ultrasonic cleaning machine can be used to treat oil stains on the surface of plates, pipes, etc., and acid cleaning or shot blasting machine can be used to treat the oxide layer and pollution on the surface of forged blocks, etc.

3、 Recycling method of titanium rod and titanium alloy returned to furnace charge

Vacuum consumable arc furnace smelting recovery

Generally, it is necessary to prepare electrodes with certain strength first to prevent

Block falling occurs. Four commonly used electrode preparation methods are:

(1) Fully mix the crumb return charge or small block return charge with sponge titanium and alloy elements, press them on the oil press to form electrode blocks, and then weld them to form consumable electrodes. This is a common method for vacuum consumable arc furnace to recover and return the charge Z, and the addition proportion of the return charge can reach 40%.

(2) Using the same grade of returned furnace charge to bind it into self consumed power f in a certain proportion, and the addition amount of returned furnace charge can reach 100%.

(3) The electrode block is used as the core material, and a certain proportion of plate 3&tubular returned furnace charge is used around to bind the electrode into a consumable electrode. The amount of returned furnace charge can be less than 80%.

(4) Consumable electrode is made from ingot riser of the same brand and specification by plasma argon arc welding, and the usage rate of returned furnace charge is 100%.

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