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Method for preparing mineral organic fertilizer from insoluble potassium-rich rock and comprehensively utilizing mineral organic fertilizer

A potassium-rich rock and organic fertilizer technology, applied to organic fertilizers, potash fertilizers, inorganic fertilizers, etc., to achieve broad application prospects, low cost, and simple preparation methods

Pending Publication Date: 2021-11-09
长春市祯盛检测技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0019] The purpose of the present invention is to provide a low-cost and large-scale industrialized continuous production method for producing mineral organic fertilizers from insoluble potassium-rich rocks, and also provides a comprehensive utilization method to solve the problem of producing potassium from potassium, Adding potassium to extract potassium, starting from potassium with potassium, carrying out large-scale industrialized continuous production of mineral organic fertilizers and comprehensive utilization

Method used

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  • Method for preparing mineral organic fertilizer from insoluble potassium-rich rock and comprehensively utilizing mineral organic fertilizer
  • Method for preparing mineral organic fertilizer from insoluble potassium-rich rock and comprehensively utilizing mineral organic fertilizer
  • Method for preparing mineral organic fertilizer from insoluble potassium-rich rock and comprehensively utilizing mineral organic fertilizer

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Embodiment 1

[0076] A method for preparing mineral organic fertilizer from insoluble potassium-rich rocks, comprising the following steps: using crushed potassium-rich rock powder of 200 mesh as raw material and potassium hydroxide in a weight ratio of 1:0.5, adding a little water, Stir thoroughly while hot to form a paste, age for 4 hours, dry, roast, and keep at a temperature of 700°C for 1 hour; cool the clinker slightly, add 1-2 times the amount of water while it is hot, stir, and leaching to obtain The slurry is passed through carbon dioxide to pH 10-10.5, neutralized with oxalic acid to pH 6-7, and spray-dried into dry powder; according to the mass fraction of potassium oxide in the dry powder, add urea and diammonium hydrogen phosphate, add humic acid to dilute, and process into Mineral organic compound fertilizer.

Embodiment 2

[0078] A method for preparing mineral organic fertilizer from insoluble potassium-rich rocks, comprising the following steps: using crushed 200-mesh potassium-rich rock powder as raw material and mixing potassium hydroxide with a weight ratio of 1:0.6, adding a little water, Stir well while it is hot to form a paste, age for 4 hours, dry, roast, and keep at 600°C for 1.5 hours; cool the clinker slightly, add 1-2 times the amount of water while it is hot, stir, and leaching to obtain Slurry, pass carbon dioxide to pH=10.2, neutralize with oxalic acid to pH6-7, spray dry into dry powder; according to the mass fraction of potassium oxide in the dry powder, add urea, potassium dihydrogen phosphate, add humic acid to dilute, process Mineral organic compound fertilizer.

Embodiment 3

[0080] A method for preparing mineral organic fertilizer from insoluble potassium-rich rocks, comprising the following steps: using crushed 200-mesh potassium-rich rock powder as raw material and mixing potassium hydroxide with a weight ratio of 1:0.4, adding a little water, Stir well while hot to form a paste, age for 4 hours, dry, roast, and keep at a temperature of 800°C for 40 minutes; cool the clinker slightly, add 1-2 times the amount of water while it is hot, stir, and leaching to obtain Slurry, pass carbon dioxide to pH = 10.2, continue to neutralize with oxalic acid to pH 6-7, spray dry into dry powder; according to the mass fraction of potassium oxide in the dry powder, add urea and diammonium hydrogen phosphate, add humic acid to dilute, process Mineral organic compound fertilizer.

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Abstract

The invention relates to a method for preparing a mineral organic fertilizer from insoluble potassium-rich rock and comprehensively utilizing the mineral organic fertilizer. The method comprises the following steps: mixing potassium hydroxide serving as an activating agent with the potassium-rich rock, adding water, stirring, aging and roasting, neutralizing into potassium oxalate by using oxalic acid to prepare a high-potassium mineral fertilizer, and mixing with nitrogen, phosphorus and humic acid to obtain a nitrogen, phosphorus and potassium mineral organic matter compound fertilizer. The preparation method is simple, low in cost and suitable for large-scale industrial continuous production; the prepared organic matter compound fertilizer can replace a three-element inorganic salt compound fertilizer which has been used for hundreds of years, and has a wide application prospect; after the clinker is processed into slurry, the pH is adjusted, the slurry is filtered to obtain a filtrate and a filter cake, and the filter cake can be processed to prepare the medium trace element soil conditioner containing potassium, nitrogen and a plurality of chelates; and the filtrate can be treated to obtain silicon dioxide, aluminum oxide, potassium hydroxide and hydrochloric acid products which can be fully and comprehensively utilized.

Description

technical field [0001] The invention belongs to the technical field of chemical minerals and processing, in particular to a method for preparing mineral organic fertilizers from insoluble potassium-rich rocks, and also to a method for comprehensively utilizing insoluble potassium-rich rocks. Background technique [0002] Potash fertilizer is one of the three major fertilizers in agriculture, which comes from the development of potassium mineral resources. Potassium minerals are divided into water-soluble potash minerals, including potassium halite, carnallite, and potassium-containing brine in salt lakes, and water-insoluble potassium rock minerals, including potassium feldspar, leucite, muscovite, and nepheline. Silicate rocks and some potassium-rich sedimentary rocks, such as potassium-rich shale. my country's soluble potassium salt resources are few, with reserves of only 203 million tons, accounting for 2.2% of the world's reserves. These water-soluble resources are sti...

Claims

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Application Information

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IPC IPC(8): C05G3/80C05G3/00
CPCC05B7/00C05G3/00C05G3/80C05C9/00C05D1/00C05D1/04C05F11/02
Inventor 张振森张巍魏学清
Owner 长春市祯盛检测技术有限公司