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Method and equipment for producing slow-release compound fertilizer from manganese ore tailings

A slow-release compound fertilizer and tailings technology, which is applied in the form of fertilizers, fertilization devices, fertilizer mixtures, etc., can solve the problems of many production process steps, high production costs, and increased burden on agricultural practitioners, and solve the problem of stacking, The effect of low cost and loss prevention

Inactive Publication Date: 2015-03-25
赵阳臣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, trace element compound fertilizers have appeared on the market, which are obtained by adding trace elements in compound fertilizers, which can promote the growth of plants, but there are many production process steps and high production costs, which increase the labor of agricultural practitioners. burden

Method used

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  • Method and equipment for producing slow-release compound fertilizer from manganese ore tailings
  • Method and equipment for producing slow-release compound fertilizer from manganese ore tailings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 Shown, add the chitosan of tailings mud weight 0.01% in the tailings mud (chitosan is dissolved with an appropriate amount of organic acid, such as acetic acid, oxalic acid, citric acid before use), mix well, filter with belt type Machine pressure filtration, the water content of the obtained filter mud is 40%, add heavy superphosphate to the filter mud, mix it evenly, put it into the slurry hopper of the fertilizer granulator, and sprinkle it evenly on the conveyor belt from the slurry hopper, The strip-shaped phosphate fertilizer mineral layer is formed by calendering by the calender roller group; potassium chloride falls from the potassium fertilizer hopper, and is evenly sprinkled on the phosphate fertilizer mineral layer, and a certain thickness of the potassium fertilizer layer is formed by calendering by the calender roller group; then urea is evenly sprinkled on the potassium fertilizer layer , through the calendering of the calendering roller g...

Embodiment 2

[0032] Such as figure 1 As shown, add 0.015% of the tailings slime weight esterified modified starch into the tailings slime, mix evenly, press filter with a belt filter press, the water content of the obtained filter mud is 45%, and add dihydrogen phosphate to the filter mud Potassium, after mixing evenly, put it into the slurry hopper of the fertilizer granulator, sprinkle it evenly on the conveyor belt from the slurry hopper, and form a strip-shaped phosphate fertilizer mineral layer through the calendering of the calender roller group; potassium sulfate falls from the potassium fertilizer hopper, sprinkle it evenly On the phosphate fertilizer mineral layer, a potassium fertilizer layer of a certain thickness is formed by calendering rollers; then ammonium bicarbonate is evenly sprinkled on the potassium fertilizer layer, and a nitrogen fertilizer layer of a certain thickness is formed by calendering rollers, which is transported by belts and pallets , enter the hemispheric...

Embodiment 3

[0034] Such as figure 1As shown, add 0.02% sodium carboxymethyl starch of the tailings mud to the tailings mud, mix evenly, press filter with a belt filter press, the water content of the obtained filter mud is 50%, add calcium and magnesium in the filter mud Phosphate fertilizer, after mixing evenly, put it into the slurry hopper of the fertilizer granulator, sprinkle it evenly on the conveyor belt from the slurry hopper, and form a strip-shaped phosphate fertilizer mineral layer through the calendering of the calender roller group; potassium nitrate falls from the potassium fertilizer hopper, sprinkle it evenly On the phosphate fertilizer mineral layer, a potassium fertilizer layer of a certain thickness is formed by calendering of the calendering roller group; then ammonium nitrate is evenly sprinkled on the potash fertilizer layer, and a nitrogen fertilizer layer of a certain thickness is formed by calendering of the calendering roller group, which is transported by the bel...

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Abstract

The invention provides a slow-release compound fertilizer, which is a spherical or near-spherical granular compound fertilizer having a layered structure, wherein the innermost layer is a nitrogenous fertilizer layer; the intermediate layer is a potassic fertilizer layer; the outer layer is a mineral layer containing phosphorus; proportions of nitrogen, phosphorus and potassium are determined according to thicknesses of the fertilizer layers. The invention further provides a production method of the slow-release compound fertilizer. Tailing pulp is generated after heavy metals, manganese and iron are recycled from leached residues of production enterprises for electrolyzing manganese metal and manganese dioxide. The production method comprises the following steps of: adding flocculating agent, the weight of which is 0.01-0.02% of that of tailing mud, into the obtained tailing pulp, carrying out filter pressing by using a belt filter press, wherein the moisture content of filtered mud is 40-50%; and then, adding phosphatic fertilizer into the filtered mud, uniformly mixing, and carrying out calendering forming three times and roller-crushing calendaring granulating once by adopting a fertilizer granulator and drying to obtain the slow-release compound fertilizer.

Description

technical field [0001] The invention relates to a method for producing slow-release compound fertilizer from manganese ore tailings, and produces compound fertilizer with layered structure. Background technique [0002] Most of the production enterprises of electrolytic manganese metal and manganese dioxide use manganese ore or pyrolusite as raw materials to produce metal manganese and electrolytic manganese dioxide through acid leaching. The process produces a large amount of leaching slag, generally 8 per ton of manganese metal produced. About tons of leaching slag contains many valuable minerals and heavy metal elements. With the decrease of mineral resources and people's emphasis on environmental protection, more and more industrial and mining enterprises have begun to develop and utilize slag in depth, and try to develop minerals and precious metals in slag, which has achieved gratifying economic benefits and environmental protection. benefit. Such as the Chinese pate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00C05G5/00
Inventor 赵阳臣
Owner 赵阳臣
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