METAL CHIP BRIQUETTING METHOD Russian patent published in 2016 - IPC C22B1/243 C22B1/244 

FIELD: metallurgy.

SUBSTANCE: metal chips comprising chips of ferrous metals and aluminium alloys are crushed, cleaned, a binding material is added, mixed and compacted in a die-mould. The ferrous metal chips are connected with the aluminium alloy chips in a ratio 3:1, mixed for 0.5-1 minute, and loaded into the die-mould cavity by 1/3. Then the binding material is added according to 10-20% of the volume of the metal chips, as such powder components at the following ratio in wt % are used: bentonite 10-15, marshallit 20-30, slag of electric steel making furnaces - the rest, and a paste-forming liquid, i.e. emultex, for its preparation PVA adhesive - 50%; methanol/ethanol - 10%; water - 40% are used. At that emultex consumption is 25-35% of the weight of the powder components, then the rest part of metal chips is added, compacted, extruded from the die-mould, and dried at 60-70°C for half a hour.

EFFECT: increased strength, physical and chemical stability of briquettes.