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Sulphate-potassium magnesium fertilizer and preparation method thereof

A technology of potassium magnesium sulfate fertilizer and sulfate ion, which is applied in the direction of magnesium fertilizer, potash fertilizer, inorganic fertilizer, etc.

Active Publication Date: 2010-12-15
GUANGDONG DAZHONG AGRI SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, salt lake brine and solid potassium-magnesium salt mine resources are limited, and the cost is high, which is not suitable for the national macro-sustainable development route; the other is to add water or potassium sulfate saturated solution to potassium mixed salt, and directly decompose and transform Production of potassium and magnesium sulfate fertilizers; another is to use suspension and mechanical methods to separate sodium chloride from potassium mixed salts and then add water or potassium sulfate saturated solution; the above two methods need to be realized in mechanical equipment, which requires large investment and production costs high defect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of potassium sulfate fertilizer, containing 10% of the sulfate radical soda-making waste residue and 90% of potassium layer stone powder, in the described soda-making waste residue, alkali slag accounts for 70%, calcium ion accounts for 30%, and magnesium ion accounts for 0%. The soda-making waste slag is obtained by rinsing, filtering and neutralizing the waste slag produced by the ammonia-soda method. There are 10% sulfate ions left in the waste slag. But when the magnesium ion content is zero, it can be prepared as potassium sulfate fertilizer.

[0026] The preparation method of the above-mentioned potassium magnesium sulfate fertilizer: firstly grind the natural potash stone into potash powder below 200 mesh; then mix the alkali-making waste residue and potash powder according to the above ratio; Carry out calcination, and the calcination time is 1 hour; cool to obtain the finished product.

Embodiment 2

[0028] A kind of potassium magnesium sulfate fertilizer, which contains 20% of the sulfate residue and 80% of the potassium layer stone powder. In the soda residue, the alkali residue accounts for 60%, the calcium ion accounts for 38%, and the magnesium ion accounts for 2%. The used soda residue is obtained by rinsing, filtering and neutralizing the waste residue produced by the ammonia-soda method, and 20% of sulfate ions remain in the waste residue.

[0029] The preparation method is the same as in Example 1, wherein the calcination temperature is 1200° C., and the calcination time is 0.5 hour.

Embodiment 3

[0031] A kind of potassium magnesium sulfate fertilizer, which contains 30% of sulfate root alkali-making waste residue and 70% of potassium layer stone powder. In the described alkali-making waste residue, alkali residue accounts for 45%, calcium ion accounts for 50%, and magnesium ion accounts for 5%. The used soda-making waste residue is obtained by rinsing, filtering and neutralizing the waste residue produced by ammonia-soda method, and 30% sulfate ion remains in the waste residue.

[0032] The preparation method is the same as in Example 1, wherein the calcination temperature is 1200° C., and the calcination time is 2 hours.

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Abstract

The invention relates to the technical field of fertilizer, in particular to a sulphate-potassium magnesium fertilizer and a method for preparing the same. The sulphate-potassium magnesium fertilizer is prepared by calcining 10 to 60 percent of soda-ash and 40 to 90 percent of potassium layer powder; the fertilizer not only has high fertilizer effect and is simple to prepare, but also saves limited natural mineral resources to a great extent; and in the preparation method, particularly the utilization of soda-ash not only is beneficial for environmental protection and makes waste profitable, but also reduces the production cost greatly and brings about good economic and social benefits.

Description

Technical field: [0001] The invention relates to the technical field of fertilizers, in particular to a potassium magnesium sulfate fertilizer and a preparation method thereof. Background technique: [0002] Potassium magnesium sulfate fertilizer is one of the series of multi-element potassium sulfate fertilizer products. It is a very important fertilizer. It can not only provide magnesium and sulfur elements to plants, but also loosen the soil and promote the growth and development of leaves, branches and roots of plants. It makes the root system of the plant huge, and at the same time can promote the absorption of nitrogen, phosphorus and other elements in the soil by the plant, and increase the ability of the plant to resist diseases. It is called "a nutrient for plant growth and high yield". Plants cannot grow normally due to magnesium deficiency, so magnesium must be supplemented in time to improve productivity and agricultural output. Magnesium is an important compone...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05D11/00C05D1/02C05D5/00
Inventor 林小明
Owner GUANGDONG DAZHONG AGRI SCI CO LTD
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