Preparation method of saline-alkali soil conditioner

Abstract

The invention discloses a preparation method of a saline-alkali soil conditioner in the technical field of saline-alkali soil improvement methods. The method comprises the specific steps: step 1, calcining calcium sulfate and grinding into powder; step 2, crushing and calcining dolomite and potassium feldspar, sorting and removing impurities, and extracting medium trace elements such as silicon, calcium, magnesium, sulfur, potassium, manganese, molybdenum and the like; and step 3, mixing humic acid, the medium trace elements obtained in the step 2 and biological bacteria. When modifier slurry is granulated, calcium sulfate powder in the slurry making process is taken out, uneven mixing of the calcium sulfate powder in the slurry making process is avoided, the calcium sulfate powder is added into powder scattering cylinders through a first communicating pipe and a second communicating pipe, and the plurality of powder scattering cylinders are driven by a driving motor to rotate rapidly; and the calcium sulfate powder in the powder scattering cylinders is scattered into a treatment cylinder and is adhered to the outer surfaces of rolling particles, so that the amounts of calcium sulfate contained in the particles are basically the same.

Description

technical field [0001] The invention relates to the technical field of saline-alkali soil improvement methods, in particular to a preparation method of a saline-alkali soil improver. Background technique [0002] There are about 99.13 million hectares of saline-alkali land in my country. Although a large number of improvement practices have been carried out in various places and some results have been achieved in the past few decades, 80% of the saline-alkali land still needs to be improved urgently, especially in the construction of "ecological civilization". Status and significance, effective and low-cost improvement of saline-alkali land is still a scientific research topic that needs breakthroughs in current agricultural production. After the amendment is applied to the soil, the quick-acting nutrients in it are slowly released, and the multi-element composite spray granulation technology is often used to make the soil amendment into pellets. [0003] The existing technol...

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Problems solved by technology

[0006] The object of the present invention is to provide a kind of preparation method of saline-alkali soil improver, to solve the problem in the prior art that in the process of producing saline-alkali soil improver in the above-mentioned background technology, it is necessary to first prepare sulfuric acid by calcining calcium sulfate. Calcium powder, using dolomite and potassium feldspar to crush and extract silicon, calcium, magnesium, sulfur, potassium, manganese, molybdenum and other trace elements, then mix humic acid, trace elements, calcium sulfate and biological bacteria, and finally The granulator makes granules, but because calcium sulfate is slightly soluble in water, when coagulating humic acid, trace elements, calcium sulfate and biological bacteria, calcium sulfate is prone to coagulation, and it is not easy to mix thoroughly with other elements. It is easy to cause uneven content of various elements in the final formed particles, which affects the improvement of saline-alkali soil

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