Copper zinc powder (commonly known as
gold powde) production is of good smelting copper zinc alloy crushing, screening and surface treatment for many times, with paint performance finished product process.
Specific operation process is as follows. In the copper zinc alloy melting furnace under 1100 ℃ within, to strictly control the copper in the process of smelting (3 # copper 99.7% purity, GB466-64) and zinc (zinc - 4 99.5% purity, GB470-64) composition proportion, according to the need to take into the trace of to adjust the hue of alloy aluminum, silicon, nickel, etc. When alloy melting liquid liquid, with compressed air through the nozzle to spray it into powder, alloy powder particles within the water trap condensation, deposition and collected. Collection of atomizing copper zinc powder by screen after washing and drying, into wet sieving machine screening, and then drying dehydration. Dry good copper zinc powder in the ball mill, grinding crushed into the solvent oil and lubricant. Lubricant generally use fatty acids, castor oil and stearic acid salts. Ball mill barrel for stainless steel round the body, the fuselage outside in the cold filter remove solvent filter cake. To form a good scale structure, therefore to annealing treatment of copper and zinc powder, the annealing temperature is 500 ℃, heat preservation, 3 h, then slowly cooled. Again after annealing treatment of copper and zinc powder grinding, fine particles formed a small scales. When using dry grinding, grinding into into stearic acid and its salts as a lubricant, we will strictly control the ratio of grinding ball and filling coefficient, the ball material ratio, dosage of lubricants and other process conditions. When the fineness regulation, with flowing wind will blow out powder collecting container. By dry grinding get more fine pigment particles under 10 microns, need air classification method is used to further classification. After grading of copper and zinc powder in cylinder type polishing machine polishing processing. Machines with small copper ball, glass ball, the copper zinc powder and the right amount of polishing agent, such as castor oil, esters and stearic acid to join in. Polishing temperature in 40 ~ 50 ℃ in general. After polishing to get finished product copper zinc powder paint.
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Gold powder suppliers
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Chemical Reagent