DE1592761B1 - Process for the granulation of powdery fertilizers containing Thomas phosphate flour - Google Patents

Description

ORIGINAL INSPECTED

Claims (1)

1 2 The invention relates to a method for die by the chemical reaction between the Granulation of Thomas phosphate flour contain organic substances and the phosphates of the the powdered fertilizers obtained with the addition of fertilizers have compounds in molasses as a binder. do not follow their nature with adhesive properties It is well known to granulate 5 more and also not absorb water, so the Powdery powder containing Thomas phosphate flour risk of agglomeration of the granules during Fertilizers to use a sugar solution when rend storage, even while very much which, as a rule, are initial, intermediate, long periods of time, are completely excluded. or waste products from sugar production. These beneficial properties of the after Insofar as molasses or granules produced in these known processes according to the invention other waste products from sugar production than bin lats also no longer make it necessary to If the means are used, these substances are un- borne operations during or after the manufacture of the used changed. Granules apply to the granules the necessary The. Use of carbohydrates and in particular to give strength and / or consistency,
special of sugar-containing substances as binders 15 The behavior of the granulated fertilizer produced according to the invention has the disadvantage that these binders, the development process, contain undesirable microorganisms in the soil, especially in relation to atmospheric agents. Another disadvantage of using rivers has been examined with the utmost care. To this end, these binders, and especially molasses, have been used in the form of permeable fertilizers in that they are very hygroscopic. The granular influences obtained with 20 packs of jute for a long time with the help of such a binder, which exactly met the conditions, therefore tended to correspond to the conditions under which they were stored under the influence of atmospheric humidity to disintegrate quickly . are present on a farm. In this case, it is therefore necessary, during or after the production, that the granulated fertilizer is not compacted, whereas the fertilizer granules have undergone a special treatment, but rather that their granular form has been preserved. It is to be provided that the granules are given no changes whatsoever with regard to sufficient strength. For example, the form, the hardness and the solubility of the phosphoric anhydride contained in the granules are known to form fertilizer under a pressure which is approximately 3.7 kg / cm ² . Listed in another of a solution of acetic acid.
In cases, the granulate is generally _{treated with CO 2.} The process according to the invention for granulation is very simple and can be achieved with the help of the free lime content of the Thomas phosphate on the surface. Purpose of generally used devices. The invention is based on the object that these are performed, for example with the help of a granular Disadvantages of the known methods for granulating lierteller or a granulating drum. The addition of powder-containing molasses containing Thomas phosphate flour, which is essentially sugar-free, can be moderate fertilizers with the addition of molasses than neither by atomization nor by free flowing in Avoid binding agents. This task is carried out gradually and distributed with the help of an agitator. the invention solved that essentially find. sugar-free molasses, as used in the manufacture of. An example is given below which is used for Lemon, glucone, milk and / or glutamine 40 is characteristic of the method according to the invention. acid from molasses by means of biological conversion is used. device of known design to 100 kg Thomas- The method according to the invention using phosphate flour 15 kg of an essentially sugar- The preparation of the essentially sugar-free molasses has free molasses, as is used in the manufacture of one of the the advantage that a granulate can be achieved that contains 45 organic acids mentioned above and the has a significantly greater strength than that has a solids content of 70%, atomized. Granules, which are made using the previously customary, After sufficient mixing of the tho- sugary molasses were produced. Further phosphate flour and molasses are obtained to promote the granules used according to the invention, which are then placed in a drying drum Binder is not given the development of an undesirable 5 °, in which the granulate at a temperature Microorganisms in the soil. temperature of about 80 ° C is dried. Afterward Through the aforementioned biological conversion, the granular fertilizer obtained is removed which is a fermentation, are cooled and poured or immediately packed,
after the secretion of the formed organic
Acids contain very complex organic substances ten, the composition and structure of which have only few claims:
is known, but they react with the phosphates, the processes for granulating Thomasphosind contained in the powdered fertilizer. This chemical reaction favors the formation of powdery fertilizers containing graphate flour and gives the granules obtained, with the addition of molasses as a binding agent, partial properties in terms of stability characterized in that im neither Storage, which was by no means to be expected, contained sugar-free molasses, as in the case of the without the desired property of a rapid production of lemon, glucon, milk and / Decays in the soil under the action of water or glutamic acid from molasses by means of bio-loss. 65 gischer conversion occurs, is used.