| 摘要 |
This invention is related to the production of liquid nitric fertilisers. The amount of nutrient substances in the nitric fertiliser is as follows (in mass percentage): nitrogen 16-26, calcium oxide 3-6, magnesium oxide 2-4, microelements 0.01-1.00 and water up to 100. The raw material is a dolomite decomposed by a 20-58 % nitric acid concentration at a temperature of 20-100 degrees Celsius, and some 10-90 minutes neutralized with ammonia or ammonia water to pH 1.5-7.5 and standardised with carbamide or other nitrogen component, which is a 1-99 % concentrated water solution or melt, and it is added at a quantity from 0.1- to 560 of dolomite mass percentage. The dolomite decomposition mixture is mixed with a nitrogen component, which can be ammonium nitrate, carbamide, liquid nitric fertiliser (carbamide ammonium nitrate solution) and ammoniates. It is neutralised by ammonium or ammonium water and separated from sediments before or after mixing. The microelement concentration in liquid nitric fertiliser is increased using substances consisting of copper, zinc, cobalt, manganese sulphates, chlorides, carbonates, nitrates, oxides, chelation compounds and molybdates, boric acid, borates, boric minerals, selenates or iodides. |
