| 摘要 |
The invention concerns a method of obtaining mineral lick enriched by macro- and microelements of constitution and form preferable from point of view of physiology of animal feeding, in waste-free process, by means of reacting of waste lime-magnesium slime from process of brine-purification or utilisation of saline mine water with phosphoric acid, separation of post-reaction mixture into residue and post-reaction solution, drying of residue by means of known methods, characterised in that phosphoric acid is diluted with water, brine or post-reaction solution so that molar concentration of phosphorus in solution is 0.3-8.0 mole/dm<3>, preferably 0.3-2.0 mole/dm<3>, next to acid solution is gradually introduced lime-magnesium slime until obtaining in reaction mixture ratio a=0.6-1.0, where "a" is ratio of molar concentrations of sum of lime and magnesium to concentration of phosphorus in reaction mixture, and molar concentration of sum of lime and magnesium in lime-magnesium slime is 0.5-3.0 mole/dm<3>, reaction of phosphoric acid with lime-magnesium slime is carried out while intensely stirring in temperature range 350-370 K, for 1-3 ks, next post-reaction mixture is separated into residue and post-reaction solution, residue is dried with use of known methods, and post-reaction solution is reversed to dilute phosphoric acid.
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