The potassium feldspar powder used for manufacturing potassium fertilizer is directly supplied by the mine

Making potash fertilizer from potassium feldspar

Due to the rich soluble potassium resources abroad, the research work on the production of potassium fertilizer from insoluble potassium ores is rarely carried out.

The former Soviet Union used earthquake stone for processing, but mainly to extract aluminum oxide and by-product potassium salt. Compared with foreign countries, China is short of soluble potassium resources, while potassium feldspar resources

However, the source is extremely rich, covering all parts of the country, with nearly 400 million tons of potassium oxide reserves. Since the 1950s, our country has begun to study the use of potassium feldspar to make potassium fertilizer, and has used dozens of processes to conduct experiments. To sum up, it can be roughly divided into: sintering method, high-temperature melting method, hydrothermal method, blast furnace smelting method and low-temperature decomposition method. The introduction is as follows:

2.2 In the sintering method, potassium feldspar, limestone and other salts are added, and some coal is added, crushed, pelletized and then baked in the shaft kiln, so that the potassium oxide in it can be converted into water-soluble potassium salt. With the change of raw material ratio and calcination temperature, the conversion rate of potassium is between 65% - 90%.

2.3 The high-temperature melting method is mainly based on the production of calcium magnesium phosphate fertilizer. The raw materials are properly mixed with potassium feldspar to make the finished fertilizer contain potassium oxide, called calcium magnesium phosphate potassium fertilizer, which contains effective P20510% - 14% and effective K202% - 3%. Compared with calcium magnesium phosphate fertilizer, every 1% K2O increase in the finished product will reduce 1% - 2% P205. The solubility of phosphorus and potassium in the finished product is generally above 95%.

2.4 Hydrothermal method uses caustic potassium solution to treat potassium feldspar under pressure, which can generate zeolite solid phase with K2O. Al203.2SiO2. xH2O component. The potassium oxide is soluble and can

It is absorbed by plants and is not easy to lose. It is a slow release fertilizer, containing 20% - 26% effective K2O, most of which is also soluble

2.5 Potassium feldspar, limestone, dolomite, fluorite, coke, etc. from blast furnace smelting process shall be crushed by a crusher and then fed into the furnace in proportion. The hearth temperature is up to 1500oC, and the volatilized K2O reacts with the CO2 in the furnace to generate K2CO3

In the presence of water vapor and a large amount of CO2, part of the generated K2CO3 is converted into KHCO3. The slag discharged from the blast furnace is processed into white cement after water quenching.

2.6 Low temperature decomposition method In the presence of additives and sulfuric acid, potassium feldspar can be decomposed at low temperature (100oC) to produce potassium ammonium sulfate binary compound fertilizer, polyaluminum chloride, white carbon black and other products.

Contact our company: Foshan Xinbo Mining Co., Ltd., Guangdong, China Contact: Mr. Su  WhatsApp/Tel:+8618038688889 WeChat: Scan QR code to add me to WeChat

 Guangdong Xinbo Mining Co., Ltd. is an enterprise specialized in mining contracting, sales and mining, and technology research and development. Guangdong Xinbo Mining Co., Ltd. is a subsidiary. Its parent company has a history of 20 years in the mineral materials industry, has a high reputation in China, and is a high-quality supplier in the industry and the ceramic glass rubber and plastic industry. The implication of Xinbo is to establish integrity and make it widely known. The business philosophy of operating with integrity and striving

Guangdong Xinbo Mining Co., Ltd. is an enterprise specialized in mining contracting, sales and mining, and technology research and development. Guangdong Xinbo Mining Co., Ltd. is a subsidiary. Its parent company has a history of 20 years in the mineral materials industry, has a high reputation in China, and is a high-quality supplier in the industry and the ceramic glass rubber and plastic industry. The implication of Xinbo is to establish integrity and make it widely known. The business philosophy of operating with integrity and striving

 Potash fertilizer grade potassium feldspar powder is made from natural raw ore by crushing and grinding, and ceramic grade potassium feldspar powder can be obtained only after water grinding, iron tapping and drying. The concepts and uses of the two are different