Method for producing fully water-soluble ammonium nitrate calcium magnesium by steel strip granulation
A technology of ammonium nitrate calcium magnesium granulation and steel belt granulation, which is applied in the direction of ammonium nitrate fertilizer, nitrate fertilizer, ammonium salt fertilizer, etc. It can solve the problems of unfavorable long-term storage of magnesium nitrate or calcium nitrate, and achieve various types of nutrients and uniform content , The effect of improving calcium absorption rate
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Embodiment 1
[0022] Embodiment 1 A method for producing fully water-soluble ammonium nitrate calcium magnesium nitrate by steel strip granulation, comprising the following steps: (1), adding calcium oxide and a 40% dilute nitric acid solution into the reactor for neutralization reaction, wherein the oxidation The molar ratio of calcium and nitric acid is 1:2, the temperature is controlled at 70°C and the reaction is stirred for 1.5 hours, then the pH of the reaction solution is adjusted to 6.5 with calcium oxide, and the obtained calcium nitrate neutralization solution is filtered by a plate and frame filter press to obtain a transparent Filtrate; pump the filtrate into the evaporator for evaporation and concentration, and evaporate to a specific gravity of 1.440 g / cm 3 ;
[0023] (2) Add ammonium nitrate solid to the concentrated calcium nitrate solution quantitatively. The ammonium nitrate solid content accounts for 7% of the calcium nitrate mass in terms of mass ratio. After stirring ev...
Embodiment 2
[0028] Embodiment 2 A method for producing fully water-soluble ammonium nitrate calcium magnesium nitrate by steel strip granulation, comprising the following steps: (1), adding calcium oxide and a 40% dilute nitric acid solution into the reactor for neutralization reaction, wherein the oxidation The molar ratio of calcium and nitric acid is 1:2, the temperature is controlled at 74°C and the reaction is stirred for 1.7 h, and then the pH of the reaction solution is adjusted to 6.7 with calcium oxide, and the obtained calcium nitrate neutralization solution is filtered by a plate and frame filter press to obtain a transparent Filtrate; pump the filtrate into the evaporator for evaporation and concentration, and evaporate to a specific gravity of 1.440 g / cm 3 ;
[0029] (2) Add ammonium nitrate solid to the concentrated calcium nitrate solution quantitatively. The ammonium nitrate solid content accounts for 6% of the calcium nitrate mass in terms of mass ratio. After stirring ev...
Embodiment 3
[0034] Embodiment 3 A method for producing fully water-soluble ammonium nitrate calcium magnesium nitrate by steel strip granulation, comprising the following steps: (1), adding calcium oxide and a 40% dilute nitric acid solution into the reactor for neutralization reaction, wherein the oxidation The molar ratio of calcium and nitric acid is 1:2, the temperature is controlled at 76°C and the reaction is stirred for 1.9 h, and then the pH of the reaction solution is adjusted to 6.9 with calcium oxide, and the obtained calcium nitrate neutralization solution is filtered by a plate and frame filter press to obtain a transparent Filtrate; pump the filtrate into the evaporator for evaporation and concentration, and evaporate to a specific gravity of 1.510g / cm 3 ;
[0035] (2) Add ammonium nitrate solid to the concentrated calcium nitrate solution quantitatively. The ammonium nitrate solid content accounts for 4% of the calcium nitrate mass in terms of mass ratio. After stirring eve...
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