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Analysis of the technical route of the lithium iron phosphate industry
Release time:
2024-07-15
In the phosphorus chemical industry price high stage, the cost of iron phosphate line is higher; and in the phosphorus chemical industry is in the low, iron phosphate due to the use of iron by-products have a certain cost advantage. Liquid-phase method in energy consumption is better than the railroad phosphate line, but if you can realize the difference in taste of lithium source, it will form a more obvious cost advantage. Oxalic acid route is more reflected in the price of oxalic acid, the current cost is relatively low.
In the current battery market, lithium iron phosphate has become the focus of attention of many enterprises with its unique performance advantages. As the key raw material for lithium iron phosphate, the choice of production route directly determines the cost and quality of the product. Today, we will discuss in detail the three mainstream routes of iron phosphate currently on the market: ammonium ferrous sulfate route, sodium ammonium ferrous sulfate line, iron route.
First, the ammonium route
Ammonium route mainly uses ferrous sulfate solution and industrial monoammonium phosphate reaction, after a series of processes to get iron phosphate. This route has the advantages of obvious cost advantage, high value of by-product ammonium sulfate and balanced product quality. However, the ammonium route also has disadvantages such as relatively low compaction density and high wastewater volume. However, due to its cost advantage and stable product quality, the ammonium route still occupies 80% of the market.
Second, sodium route
The sodium route adopts the production method of phosphoric acid + liquid alkali/soda ash + ferrous sulfate to obtain iron phosphate through steam heating, aging, filtration and other process steps. The advantage of the sodium route is that it is suitable for combining with refined phosphoric acid, and the compacted density of the sodium salt system is relatively high. However, the sodium route also has disadvantages such as strict requirements for controlling the sodium ion content in the product and difficulty in handling the by-product sodium sulfate. Nevertheless, there are still 15% of enterprises choose sodium route.
Third, iron route
Iron route is the use of phosphoric acid + iron powder / iron heated and dissolved way to produce iron phosphate. This route has less wastewater and less environmental pressure, but the stability is relatively poor. In addition, the iron route to the iron source and phosphoric acid purity requirements are higher, the raw material requires low impurity content, resulting in high costs. Therefore, only 5% of enterprises choose the iron route.
Lithium iron phosphate mainstream technology route comparison
In addition to the production route of iron phosphate, the production of lithium iron phosphate there are also a variety of technical routes. Among them, the solid-phase method, oxalic acid solid-phase method and liquid-phase method are the three mainstream routes.
Liquid-phase method in the cost side of the advantage is mainly reflected in the lower energy consumption, raw material taste advantage and lithium source of lower unit consumption and so on. The advantages of the railroad phosphate route in the cost end are reflected in the full use of raw material elements, low cost of waste gas treatment and more chemical by-products that can be utilized. In addition, the oxalic acid railroad line is relatively low cost, but whether the future price increase depends on the market situation.
Summarize
The theoretical cost curve of different lithium iron phosphate technology routes is relatively flat. In the phosphorus chemical industry price high stage, the cost of iron phosphate line is higher; and in the phosphorus chemical industry is in the low, iron phosphate due to the use of iron by-products have a certain cost advantage. Liquid-phase method in energy consumption is better than the railroad phosphate line, but if you can realize the difference in taste of lithium source, it will form a more obvious cost advantage. Oxalic acid route is more reflected in the price of oxalic acid, the current cost is relatively low.
Relevant information
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