Abrasive Blasting (materials For The Sandblasting Process )
Abrasive blasting has the characteristics of short grinding time, high efficiency, good benefit and low price; Moderate hardness, high toughness, good self-sharpness, low sand consumption and can be recycled, good grinding finish; And the chemical composition is stable, wear resistance, acid and alkali resistance. Sandblasting abrasives have shell-like fractures with sharp edges and corners, which can form new edges and edges in continuous grinding and grading, making their grinding ability superior to other abrasives. In particular, it has the advantages of high hardness, heavy ratio, stable chemical properties and unique self-sharpness, which become the first choice for abrasive blasting process. At the same time, it is the ideal material for sandblasting, rust cleaning, grinding and polishing.
Abrasive blasting is the use of compressed air as a power to form a high-speed jet beam to spray the spray material (garnet, copper ore, quartz sand, emery, iron sand, Hainan sand) high-speed spray to the surface of the workpiece that needs to be treated, so that the appearance or shape of the outer surface of the workpiece surface changes, due to the impact and cutting effect of abrasive on the surface of the workpiece, Make the surface of the workpiece to obtain a certain degree of cleanliness and different roughness, so that the mechanical properties of the surface of the workpiece are improved, so as to improve the fatigue resistance of the workpiece, increase the adhesion between it and the coating, extend the durability of the coating film, but also conducive to the flow and decoration of the coating.
Silicon carbide (SiC) is an artificial abrasive, is the quartz sand, petroleum coke (or coal coke), wood chips (the production of green silicon carbide need to add salt) and other raw materials through the resistance furnace high temperature smelting. Pure silicon carbide is a colorless transparent crystal. Industrial silicon carbide is light yellow, green, blue and even black because of the type and content of impurities contained, and the transparency varies with its purity. Silicon carbide processing sand powder production enterprises are mainly distributed in Henan, Shandong, Jiangsu, Jilin, Heilongjiang and other provinces.
Garnet sand
Garnet sand, also known as natural emery, is a natural abrasive, because garnet hardness is large (Mohs hardness 7.5-8), crystal shape is good, after crushing with sharp edges, suitable for natural abrasive and sandblasting polishing materials. Mainly used in aircraft, ships, automobile manufacturing metal polishing, high-quality furniture polishing, picture tube polishing, ceramic glass polishing, leather, rubber polishing and instead of acid corrosion for aluminum profile production processes. As a "natural emery", the annual production and consumption of the international market are increasing. The processing of garnet in China is dominated by pomegranate-ferro-aluminum garnet from Rizhao, Shandong and Lianyungang, Jiangsu.
Quartz sand
Quartz stone, a natural abrasive, is a hard, wear-resistant, chemically stable silicate mineral, its main mineral composition is SiO2. The color of quartz sand is milky white, or colorless translucent, Mohs hardness 7. From a nationwide perspective, quartz ore distribution is relatively wide. Used for abrasive materials (sandblasting, hard abrasive paper, sandpaper, emery cloth, etc.), sand cleaning, rust removal, removal of oxide processing.
1, must wear protective equipment before work, do not work with bare arms. No less than two people at work.
2, gas storage tank, pressure gauge, safety valve to be regularly checked. The gas storage tank is discharged once every two weeks, and the filter in the sand tank is checked once a month.
3. Check whether the ventilation pipe and the sandblasting machine door are sealed. Five minutes before work, the ventilation and dust removal equipment must be started. When the ventilation and dust removal equipment fails, the sand blasting machine is forbidden to work.
4, the compressed air valve should be slowly opened, and the air pressure should not exceed 0.8MPa.
5, the grit should be suitable for the work requirements, generally between ten and twenty, the sand should be kept dry.
6. When the sand blasting machine is working, it is forbidden to approach irrelevant personnel. When cleaning and adjusting the operating part, it should be stopped.
7, do not use compressed air to blow dust or joke.
8, after the work, the ventilation and dust removal equipment should continue to operate for five minutes and then close, in order to discharge indoor dust and keep the site clean.
9, in the event of personal and equipment accidents, should maintain the scene, and report to the relevant departments.
JIYGO REFRACTORY & ABRASIVE LIMITED
