Thermal phosphoric acid process uses yellow phosphorus as raw materials with electrothermal production, made of phosphoric acid with content of 85% by Combustion water.
Thermal phosphoric acid production process with a heat recovery unit, usually two-step method, ie the combustion of phosphorus and P2O5 hydration in the two devices. Among them, P2O5 hydration device with the traditional hydration tower; burning phosphorus equipment within the set of heat exchange tubes, the heat of combustion of the recovery of phosphorus and byproduct steam. The key technology of burning phosphorus devices is how to prevent heat exchange tubes P2O5 was high temperature gas corrosion, and can provide good heat transfer conditions.
通过控制过程条件来保护国家专利技术，使得在特殊磷化物的表面层上形成的热交换钢管。
湿法磷酸来自磷酸盐岩石无机酸（主要是硫酸或盐酸）分解，首先得到粗磷酸的肥料，然后通过各种步骤纯化杂质，最终纯度和工业热过程 -制造级磷酸浓缩物。主要纯化方法是化学沉淀，离子交换树脂，结晶，溶剂沉淀和溶剂萃取。溶剂萃取已经获得了高纯度的产品，生产技术和设备相对简单，能耗低，原料消耗，生产能力，分离，恢复较少，环境污染较少，生产过程易于自动和连续，有利于综合利用资源和其他优势，吸引着广泛的关注。
回转窑窑磷酸过程ing gas heating of low-grade phosphate rock powder, to restore the oxidation reaction, rotary kiln kiln gas preparation of industrial phosphoric acid absorbed by the circulating acid. The new kiln phosphoric acid process is characterized by: high impurity content, it can use low grade phosphate rock to produce high-quality and high concentration of phosphoric acid;, P2O5 content as low as 17% when the high SiO2 content of phosphate in; system the quality and concentration of phosphoric acid at or near the thermal phosphoric acid. In addition, the process to make full use of the chemical reaction heat of the production process, significantly reducing the production of energy.
磷化is the process of converting a steel surface to iron phosphate. This is mostly used as a pretreatment method in conjunction with another method of corrosion protection. A layer of phosphate coating typically includes iron, zinc or manganese crystals.
磷化is also known as phophatizing and phosphate conversion coating.
CORROSIOSPEDIA解释磷化
磷酸涂层通常适用于碳钢，低合金钢和铸铁。用铁，锌或磷酸锰溶液形成涂层，通过将溶液喷涂到基板上，或将基材浸入溶液中。当钢或铁零件置于磷酸中时，这导致局部耗尽的金属反应耗尽氢（H3O +）离子，升高pH，并使溶解的盐从溶液中脱落并沉淀在表面上。酸和金属反应还产生可沉积的磷酸铁。
以下是典型的磷化程序：
The main uses of phosphating are:
Corrosion protection in conjunction with organic coatings, such as paints and polymer films
Facilitation of cold-forming processes, such as wire drawing and tube drawing, or deep drawing
Specification, standard and identification无缝管广泛应用于核设备，天然气，石化，船舶建筑和锅炉行业。无缝管在中国锅炉行业中占据65％的市场份额。
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