Mr.zhang is in the south of sichuan province, bordering yunnan, is the largest iron and steel base in southwest in China.Pangang group,A53B ERW carbon steel welding round tube the original is state-owned assets supervision and management of central enterprises directly under the state council, now a wholly owned subsidiary of anshan iron and steel group, of China is the world's second largest vanadium production enterprise, the titanium materials, China's largest and most complete industry chain of titanium processing enterprise.
In the past, steel sintered ash handling is piled up and return to the sintering, but due to pile up easy to pollute the environment, the environmental protection department has banned;45 degree short radius pipe fitting elbows Return sinter is not the best way, because the vulnerable to blast furnace wall corrosion, repeated use made of lead and other non-ferrous metal impurity and fluorine, chlorine and other non-metallic impurities are mandatory to the ironmaking process, to the quality of the service life of blast furnace and steel has a certain influence, but also increase the energy consumption of ironmaking coal (coke).
"National environmental protection" twelfth five-year "plan", "twelfth five-year" period, the environmental protection the main direction of iron and steel industry focused on the backward,black carbon steel butt welded concentric reducer sintering desulfurization denitration, sintering efficient dust removal and four fields such as dioxin pollution prevention. Among them, the sintering efficient dust removal problem is steel commonly encountered difficulties to be overcome.
Our correspondent information display, beginning in 2010, is located in panzhihua of panzhihua steel vanadium co., LTD. Sales will sintering ashes.A 2010 "comprehensive utilization of panzhihua vanadium resources in panzhihua technology co., LTD. Product sales contract" (contract number: 273041090-90000001-10) show that pangang to sell 4800 tons of sintered ash to panzhihua fire phoenix renewable resources recycling companies (hereinafter referred to as "fire phoenix company"),API 5L gr.b erw carbon steel round pipe the price is 4.27 yuan/ton, extract industrial salt (KCL).
Potassium is one of the most shortage of non-metallic products in our country, has proven reserves of potassium accounted for only 0.002% of the world's reserves, and distributed unevenly, out of the ground is not much. More than 80% of the potash resources in China need to import, more than 95% of these potash is potassium chloride, domestic potash especially potassium chloride product market demand is huge.In addition, the sintering ashes calcium oxide, sodium oxide, copper, lead, arsenic trioxide of metal and compound content is high (individual samples also contain gold and silver), these resources can be into.
Fire phoenix company chairman Yi Dehua told our reporter, relying on the yunnan university, yunnan nonferrous metal research institute and technical support of panzhihua iron and steel research institute, in ensure sintered ash and high concentration brine under the premise of all resource utilization, no longer produces new waste residue, waste gas, waste water.
Theoretical calculations, after using the resource utilization technology, sintering ashes will no longer be recycled, calculated on every 45 tons of sintered ash handling, can save nearly 18000 tons of coal a year, worth about $27 million. Press sintering ashes 12% lead content, each year can save 1350 tons of raw coal, worth about $1.8 million. Add sintering ashes silicate heat consumption and other harmful impurities, can save energy spending 33 million yuan each year.
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