31results about How to "High defluorination efficiency" patented technology

The invention discloses a non-phosphate precipitation wet phosphoric acid purification method, which belongs to the field of phosphorus chemical industry. The non-phosphate precipitation method wet-process phosphoric acid purification technology is to use the chemical agent to combine with the anion and cation of dilute phosphoric acid to form an insoluble double salt, which is precipitated in the form of non-phosphate, so as to achieve the purpose of wet-process phosphoric acid purification and meet the requirements of high-concentration production. Requirements for phosphate fertilizers, water-soluble fertilizers and industrial-grade phosphate products. The method is stable in removing iron, magnesium, aluminum, arsenic, lead, sodium, potassium, and sulfate radicals in wet-process phosphoric acid, and has simple reaction conditions, short process flow, wide range of reagent sources, low treatment cost, and P 2 o 5 With the characteristics of high recovery rate, it realizes the one-step dilute acid "removal of half and half + weight removal + desulfurization". After treatment, the removal rates of wet-process iron phosphate, magnesium, and aluminum are over 97%, 70%, and 15% respectively. The arsenic and lead in dilute acid are less than 5ppm, and sodium (calculated as NaO) and potassium (calculated as K 2 O meter) respectively less than 0.025%, 0.083%, sulfate less than 0.16%, P 2 o 5 The recovery rate is higher than 98.5%.

The invention discloses a load-type fluorine remover used for removing hydrogen fluoride in hydrogen chloride gas, which is composed of a porous carrier and a fluorine removal active ingredient loaded on the porous carrier, the fluorine removal active ingredient can be existed on inner part and external surface of the tunnel of the porous carrier in a thin layer mode with particles of 0.1nm-5mum, and the mass ratio of the fluorine removal active ingredient to the porous carrier is 0.0005-3: 1. The invention also provides a preparation method of the load-type fluorine remover. The preparation method thereof has the advantage of simple process, and the prepared load-type fluorine remover has the advantages of high utilization rate, good fluorine removal effect and green environmental protection.

The invention provides a defluorination calcination device and technology for minerals containing lithium. The defluorination calcination device comprises a mineral powder preheating system, a vapor preheating system, a fluidized bed calcination system and a vapor circulating system, wherein the fluidized bed calcination system comprises a fluidized bed calcination furnace; the mineral powder preheating system and the vapor preheating system are separately connected with the fluidized bed calcination system; the vapor circulating system comprises a steam boiler and a compressor; an air inlet of the steam boiler is connected with the fluidized bed calcination system; a water outlet and a flue gas outlet of the steam boiler are separately connected with an air inlet of the compressor; the air outlet of the compressor is connected with the vapor preheating system; and optionally, the defluorination calcination device also comprises a feeding system, a gas absorbing system and a cooling system. The defluorination rate of the defluorination calcination device achieves 85% or above, and the calcination process is good in economical efficiency; the circulation of a part of vapor is adopted, so that the vapor consumption is reduced; and besides, the cooling of high-temperature defluorination materials is utilized to preheat circulating vapor to generate high-temperature vapor, and the heat utilization ratio is high.

The invention provides a roasting defluorination device and process. The roasting defluorination device includes a material mixing system, a mixture preheating system, a water vapor preheating system and a fluidized bed roasting system. The fluidized bed roasting system includes a fluidized bed Roasting furnace, the material mixing system is connected with the mixture preheating system, the mixture preheating system and the steam preheating system are connected with the fluidized bed roasting system; optionally, the device also includes a gas absorption system, a cooling system and an induction The wind system, the gas absorption system and the cooling system are connected with the fluidized bed roasting system, and the air induction system is connected with the gas absorption system. The device can achieve in-situ defluorination, with a fluorine fixation rate of over 95%, and a defluorination rate of over 90%. High-temperature water is produced by using high-temperature defluorination tail gas, high-temperature flue gas generated by the combustion chamber, and heat generated by cooling defluorinated materials Steam, high heat utilization rate; low water vapor consumption, good economical roasting process, suitable for large-scale continuous industrial production.