Fourth, since the sulfate required for the production of the present invention is provided by the acid leaching slag itself, the mass fraction of the SO/- contained in the acid leaching slag is 15% or more, and the nanometer is prepared by using the acid leaching residue as the zinc and sulfate raw material of the lithopone. Lide powder products not only realize the resource utilization of acid leaching slag, but also turn waste into treasure, and treat and improve the acidic soil of acid leaching residue to purify the environment. Low production costs and simple operation. The metathesis reaction is carried out in a low-density ammonia system (the metathesis reactant is dissolved in recovered ammonia water), and the crystal nucleus formed is smaller. It is non-toxic and safe. The ammonia solution after synthesis and separation is returned to the leaching. There is no waste water in the whole production process. The produced waste residue meets the national solid waste discharge standard for efflux, conforms to the national industrial policy, and is an environmentally friendly “green” type process.
This white pigment composed of barium sulfate and zinc sulfide, is influenced by several market drivers and trends. One significant driver is the expanding demand for lithopone in the paint and coating industry, owing to its excellent hiding power and (ultraviolet) UV resistance. The construction sector also propels the market growth of this compound, as it is widely used in architectural coatings for its durability and weather resistance. Additionally, the rising popularity of lithopone in the plastic and rubber industries, driven by its ability to enhance product opacity and stability, contributes to market expansion. Trends in this compound market include a growing emphasis on eco-friendly alternatives, stimulating research and development of sustainable production processes. Furthermore, the increasing focus on product quality and performance, along with advancements in nanotechnology applications, presents new opportunities for lithopone market players. Overall, the evolving landscape of industries utilizing this compound underscores its dynamic market, driven by both traditional applications and emerging trends.
Although barium sulfate is almost completely inert, zinc sulfide degrades upon exposure to UV light, leading to darkening of the pigment. The severity of this UV reaction is dependent on a combination of two factors; how much zinc sulfide makes up the pigments formulation, and its total accumulated UV exposure. Depending on these factors the pigment itself can vary in shade over time, ranging from pure white all the way to grey or even black. To suppress this effect, a dopant may be used, such as a small amount of cobalt salts, which would be added to the formulation. This process creates cobalt-doped zinc sulfide. The cobalt salts help to stabilize zinc sulfide so it will not have as severe a reaction to UV exposure.