Method for producing potassium-calcium fertilizer by using potassium feldspar, limestone and phosphogypsum

A technology for phosphogypsum and limestone, which is applied in the fields of environmental protection and chemical production, can solve the problems of complex process, high energy consumption, large amount of waste residue, etc., and achieve the effect of short sintering time and low sintering temperature

Inactive Publication Date: 2009-09-30
GUIZHOU XIYANG FERTILIZER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problems in the preparation of potassium fertilizer by wet leaching are that the process is complicated, the energy consumption is high, the silicon component in the potassium ore is not rationally utilized, and a large amount of waste residue is produced after extraction, which is difficult to implement industrially.
[0004] At present, there are no patent applications and related technologies for the production of potassium-calcium fertilizer by using potassium feldspar, limestone and phosphogypsum, and the production of potassium-calcium fertilizer by sintering limestone and potassium feldspar with phosphogypsum is more than the production of potassium-calcium fertilizer by sintering potassium feldspar and limestone Fertilizer has more advantages, including low operating temperature, stable product quality, reduced energy consumption, effective use of sulfur in phosphogypsum, more comprehensive active ingredients in the product, and a new way to solve the pollution of three wastes of phosphogypsum

Method used

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  • Method for producing potassium-calcium fertilizer by using potassium feldspar, limestone and phosphogypsum
  • Method for producing potassium-calcium fertilizer by using potassium feldspar, limestone and phosphogypsum
  • Method for producing potassium-calcium fertilizer by using potassium feldspar, limestone and phosphogypsum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Raw material 1: Potassium feldspar, collection location: Feng County, Jiangsu

[0020] The chemical composition of potassium feldspar is shown in the table below

[0021]

[0022] Raw material 2: Phosphogypsum, collection location: Guizhou Xiyang Fertilizer Co., Ltd.

[0023] The chemical composition of phosphogypsum is shown in the table below

[0024]

[0025] Raw material 3: limestone, collection location: Xifeng, Guizhou

[0026] The chemical composition of limestone is shown in the table below

[0027]

Embodiment approach

[0029] The pre-crushed potassium feldspar, limestone and phosphogypsum are mixed with an electronic scale at a mass ratio of 1:0.9:0.6, and the mixed material is dried by a dryer and then ground to 120 mesh with a ball mill (residual sieve ≤ 5%) , the powder is formed into balls by adding water in the disc-type ball forming machine. The particle size of the balls is controlled at φ10-φ30mm, and the water content is 10%-15%. The time is 40 minutes, the sintered clinker is cooled and ground to 80 meshes with a ball mill, and the sieve residue <5% is packaged to be the finished product of potassium calcium fertilizer.

[0030] Implementation results:

[0031] The active ingredients of the potassium-calcium fertilizer prepared by testing are shown in the table below

[0032]

[0033] It can be seen from the above table that the indicators of active components of the potassium calcium fertilizer prepared through industrial tests meet the enterprise standards. K in potassium or...

Embodiment 2

[0035] Raw material 1: Potassium feldspar, collection location: Feng County, Jiangsu

[0036] The chemical composition of potassium feldspar is shown in the table below

[0037]

[0038] Raw material 2: Phosphogypsum, collection location: Guizhou Xiyang Fertilizer Co., Ltd.

[0039] The chemical composition of phosphogypsum is shown in the table below

[0040]

[0041] Raw material 3: limestone, collection location: Xifeng, Guizhou

[0042] The chemical composition of limestone is shown in the table below

[0043]

[0044] method of execution:

[0045] The pre-crushed potassium feldspar, limestone and phosphogypsum are mixed with an electronic scale at a mass ratio of 1:0.9:0.7, and the mixed material is dried by a dryer and then ground to 120 mesh with a ball mill (residual sieve ≤ 5%) , the powder is formed into balls by adding water in the disc-type ball forming machine. The particle size of the balls is controlled at φ10-φ30mm, and the water content is 10%-15%...

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Abstract

The invention relates to a method for producing potassium-calcium fertilizer by using potassium feldspar, limestone and phosphogypsum, and belongs to the technical fields of three-waste treatment and chemical engineering technical field. The method comprises that: the feldspar, the limestone and the phosphogypsum are mixed in certain proportion, subjected to grinding, ball forming or block forming and then baked in a rotary kiln, vertical kiln or tunnel kiln, and the sintered grog is crushed and packaged into products of the potassium-calcium fertilizer. One of main raw materials for producing the potassium-calcium fertilizer is industrial waste residue phosphogypsum, and the method has more advantages than the prior methods for producing the potassium-calcium fertilizer.

Description

Technical field: [0001] The invention relates to a method for producing potassium calcium fertilizer by using potassium feldspar, limestone and phosphogypsum, and belongs to the technical fields of environmental protection management and chemical production. Background technique: [0002] Although there are not many water-soluble potassium ore resources that can be directly used to produce potash fertilizers in China, insoluble potassium ore resources are very rich. Potassium feldspar is one of the more important ones. Potassium feldspar contains both potassium and silicon, and its chemical formula is K 2 O·Al 2 o 3 ·6SiO2 2 , including K 2 O16.9%, Al 2 o 3 18.4%, SiO 2 64.7%. Although the content of potassium oxide in potassium feldspar is not too high, it has a large reserve in the earth's crust and is widely distributed. If these potassium ore resources can be used to produce potash fertilizers, the problem of shortage of potash fertilizer production resources i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00C05D1/00C05D3/02
Inventor 张西兴朱云勤庞世花马武权
Owner GUIZHOU XIYANG FERTILIZER IND
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