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Method for producing alkaline fertilizer from insoluble potassium-containing rock by kiln process

A technology of alkaline fertilizer and potassium rock, which is applied in the direction of fertilizer mixture, application, fertilization equipment, etc., can solve the problems of single potassium and calcium fertilizer nutrients, increase process complexity, and high temperature, and achieve close material contact, low energy consumption, and high temperature low effect

Active Publication Date: 2013-05-08
KINGENTA NORSTERRA CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its advantage is that the phosphate rock tailings polluting the environment will be reused, and the phosphorus and magnesium resources in it will be converted into active ingredients in calcium magnesium phosphate fertilizers, but there are the following disadvantages: 1), the temperature during roasting is high (1350 ~1450℃), high energy consumption
2) More raw materials are required, and silica, serpentine and coke (or pulverized coal) need to be used, and all of them need to be ground, which increases the complexity of the process
This patented process has no obvious disadvantages, but compared with compound fertilizers, the nutrients in potassium-calcium fertilizers are too simple, and only potassium exists
[0005] There are no patents and related technology reports on the production of alkaline fertilizers using phosphate rock tailings or low-grade phosphate rock and insoluble potassium-containing rock kilns.

Method used

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  • Method for producing alkaline fertilizer from insoluble potassium-containing rock by kiln process
  • Method for producing alkaline fertilizer from insoluble potassium-containing rock by kiln process
  • Method for producing alkaline fertilizer from insoluble potassium-containing rock by kiln process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Raw material 1: Phosphate ore tailings, collection location: Guizhou Jinde Mining

[0042] The main chemical composition of phosphorite tailings in the present embodiment is shown in Table 1:

[0043] Table 1

[0044]

[0045] Raw material 2: Potassium feldspar, collection location: Feicheng, Shandong

[0046] The main chemical composition of potassium feldspar in the present embodiment is shown in Table 2:

[0047] Table 2

[0048]

[0049] Raw material 3: anthracite, place of origin: Zhengzhou, Henan

[0050] production method:

[0051] Phosphate tailings and potassium feldspar are batched according to the mass ratio of 1:0.55, and then anthracite accounting for 4.5wt% of the total amount of phosphate tailings and potassium feldspar is added, and the mixture is dried by a dryer and then ground with a ball mill to 100 mesh (residual sieve ≤ 5wt%), powdery material is added with water to make a square block, the volume of the block is 1.6~2.2dm 3 Between, th...

Embodiment 2

[0058] Raw material 1: Phosphate ore tailings, collection location: Guizhou Jinde Mining

[0059] The main chemical composition of phosphorite tailings in the present embodiment is shown in Table 4:

[0060] Table 4

[0061]

[0062] Raw material 2: Potassium feldspar, collection location: Qiping, Guizhou

[0063] The main chemical composition of potassium feldspar in the present embodiment is shown in Table 5:

[0064] table 5

[0065]

[0066] Raw material 3: anthracite, place of origin: Zhengzhou, Henan

[0067] production method:

[0068] Phosphate ore tailings and potassium feldspar are mixed according to the mass ratio of 1:0.6, and then anthracite accounting for 5wt% of the total amount of phosphate ore tailings and potassium feldspar is added. The mixed material is dried by a dryer and then ground to 120 by a ball mill. mesh (residual sieve ≤ 5%), the powdery material is added with water to make a spherical material block, the diameter of the material block ...

Embodiment 3

[0075] Raw material 1: low-grade phosphate rock, collection location: Fuquan, Guizhou

[0076] The main chemical composition of low-grade phosphate rock in the present embodiment is shown in Table 7:

[0077] Table 7

[0078]

[0079] Raw material 2: Potassium feldspar, collection location: Qiping, Guizhou

[0080] The main chemical composition of potassium feldspar in the present embodiment is shown in Table 8:

[0081] Table 8

[0082]

[0083] Raw material 3: anthracite, place of origin: Zhengzhou, Henan

[0084] production method:

[0085] The low-grade phosphate rock and potassium feldspar are mixed according to the mass ratio of 1:0.65, and anthracite accounting for 7wt% of the total amount of phosphate rock tailings and potassium feldspar is added. The mixture is dried by a dryer and then ground to 110 by a ball mill. mesh (residual sieve ≤ 5%), add water to the powdery material to make a square block, the volume of the block is 1.0~2.0dm 3 Between, the wate...

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Abstract

The invention discloses a method for producing an alkaline fertilizer from insoluble potassium-containing rock by a kiln process, belonging to the technical field of chemical production. The method comprises the following steps: mixing phosphate rock tailings or low-grade phosphate rock with the insoluble potassium-containing rock according to the weight ratio of 1:(0.4-0.9), further adding anthracite accounting for 3-8% of the total mixed weight, drying, grinding and further preparing a material block; and then placing into a kiln, roasting at the temperature of 1000-1200 DEG C for 30-150 minutes to prepare sintered clinker, finally performing water quenching, reducing the temperature of the sintered clinker to 400-700 DEG C, and draining, drying, crushing and grinding the sintered clinker after water quenching to prepare the alkaline fertilizer. According to the method disclosed by the invention, the roasting temperature is only 1000-1200 DEG C, the energy consumption is low, and the process is simple; and phosphogypsum is not used, SO2 gas causing serious pollution of air is not contained in tail gas, and the special treatment of the tail gas is not required.

Description

Technical field: [0001] The invention relates to a method for producing alkaline fertilizer by using phosphate rock tailings or low-grade phosphate rock and insoluble potassium-containing rock kiln method, belonging to the technical field of chemical production. Background technique: [0002] Phosphate ore required for the production of high-concentration phosphate fertilizers can be obtained by flotation of medium and low-grade phosphate ore and high-magnesium phosphate ore in addition to direct use of rich phosphate ore. The tailings generated during the flotation process (accounting for 25-35 %) are often stacked in the form of tailings slurry. With the rapid development of high-concentration phosphate fertilizer industry at home and abroad, the accumulation of phosphate rock tailings not only occupies a large amount of land resources, but also causes more and more serious pollution to the environment. At present, the behavior of mining the rich and abandoning the poor is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00
Inventor 庞世花胡兆平杨红梅刘阳杨位红王子浩
Owner KINGENTA NORSTERRA CHEM CO LTD
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