fabricant de pompes centrifuges verticales

It is important to know that the shape of the sand has an important impact on the surface finish of the casting. Circular sand is better than triangular sand because the triangular sand has a large gap, which is easy to lead to defects such as porosity; According to the nature of the casting, the sodium silicate quartz sand is selected to form a spalling layer, and combined with the characteristics of cooling and shrinkage of the casting, the surface defects are reduced. Coating a protective layer on the surface of large castings, such as the film on a coated sand mold, can improve the surface finish of the sand mold and reduce the surface defects of the casting.  

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  • In a 2022 study published in the Journal of Hazardous Materials, scientists wanted to examine the effects of titanium dioxide as a food additive on atherosclerosis in mice. (Atherosclerosis refers to a hardening of the arteries.) Researchers fed mice 40 mg/kg of the food additive every day for 4 months, and found that it not only altered gut microbiota but also led to a significantly increased atherosclerotic lesion area, especially in animals that consumed a high-choline western diet (HCD).

  • no changes to DNA in various animal studies
  • Rutile grade titanium dioxide (TiO2) is a widely used white pigment that offers excellent whiteness, opacity, and UV protection. It is commonly used in various applications, including paints, plastics, coatings, and inks. One of the most popular rutile TiO2 grades is R1930, which is known for its high brightness, high dispersion, and good chemical resistance.
  • Safety is another critical aspect when considering the use of any additive in food products. Food-grade titanium dioxide is generally recognized as safe (GRAS) by the U.S. Food and Drug Administration (FDA) when used in accordance with good manufacturing practices. However, it is essential for manufacturers to adhere strictly to recommended usage levels to ensure consumer safety.
  • Physical and Chemical Properties