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Method for producing alkaline fertilizer by phosphate rock tailings or low-grade phosphate rock kiln method

A technology for phosphate rock tailings and alkaline fertilizers, applied in fertilizer mixtures, fertilization devices, applications, etc., can solve the problems of many raw materials required, high roasting temperature, complex processes, etc., and achieve stable product quality, low energy consumption, simple craftsmanship

Active Publication Date: 2013-04-24
KINGENTA ECOLOGICAL ENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the defects of high roasting temperature, large energy consumption, many raw materials required, complicated process and inability to simultaneously utilize low-grade phosphate rock and insoluble potassium-containing rock to produce compound fertilizers such as calcium, magnesium, phosphorus, silicon, and potassium in the prior art. , providing a method for producing alkaline fertilizer from phosphate rock tailings or low-grade phosphate rock kiln method

Method used

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  • Method for producing alkaline fertilizer by phosphate rock tailings or low-grade phosphate rock kiln method
  • Method for producing alkaline fertilizer by phosphate rock tailings or low-grade phosphate rock kiln method
  • Method for producing alkaline fertilizer by phosphate rock tailings or low-grade phosphate rock kiln method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Raw material 1: Phosphate ore tailings, collection location: Guizhou Jinde Mining

[0037] The main chemical composition of phosphorite tailings in the present embodiment is shown in Table 1:

[0038] Table 1

[0039]

[0040] Raw material 2: Potassium feldspar, collection location: Feicheng, Shandong

[0041] The main chemical composition of potassium feldspar in the present embodiment is shown in Table 2:

[0042] Table 2

[0043]

Embodiment approach

[0045]The phosphate rock tailings and potassium feldspar are batched with an electronic scale at a mass ratio of 1:0.55, and then anthracite accounting for 4.5% of the total mass of the phosphate rock tailings and potassium feldspar is added, and the mixture is dried by a dryer before use The ball mill is ground to 100 mesh (residual sieve ≤ 5%), the powder is sent to the rotary kiln for roasting, and the high temperature is controlled at 1100°C for 50 minutes. The sintered clinker is quenched in water and cooled to 600°C within 5 minutes. The solid is drained and dried. After crushing, use a ball mill to grind to 80 mesh, and the residual sieve ≤ 5%, after packaging, it is the finished alkaline fertilizer.

[0046] Implementation results:

[0047] The active ingredients of the alkaline fertilizer prepared by scanning inductively coupled high-frequency plasma emission spectrometer ICPS-7500 are shown in the following table 3:

[0048] table 3

[0049]

[0050] It can be s...

Embodiment 2

[0052] Raw material 1: Phosphate ore tailings, collection location: Guizhou Jinde Mining

[0053] The main chemical composition of phosphorite tailings in the present embodiment is shown in Table 4:

[0054] Table 4

[0055]

[0056] Raw material 2: Potassium feldspar, collection location: Qiping, Guizhou

[0057] The main chemical composition of potassium feldspar in the present embodiment is shown in Table 5:

[0058] table 5

[0059]

[0060] method of execution:

[0061] The phosphate rock tailings and potassium feldspar are mixed with an electronic scale at a mass ratio of 1:0.6, and then anthracite accounting for 5% of the total mass of the phosphate rock tailings and potassium feldspar is added, and the mixture is dried by a dryer before use The ball mill is ground to 120 mesh (residual sieve ≤ 5%), the powder is sent to the rotary kiln for roasting, the high temperature is controlled at 1150°C for 40 minutes, the sintered clinker is cooled to 500°C within 5 m...

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Abstract

The invention discloses a method for producing an alkaline fertilizer by a phosphate rock tailing or low-grade phosphate rock kiln method, and belongs to the technical field of chemical industry production. The method comprises the preparation steps of mixing the phosphate rock tailings or low-grade phosphate rock with insoluble sylvine-containing rock according to the weight ratio of 1: (0.4-0.9); adding blind coal which is 3-8% of total weight of the mixture to obtain the mixed material; drying and grinding the mixed material into 60-150 meshes to obtain a powder material; putting the powder material into a rotary kiln, baking for 30-150 minutes at 1000-12000 DEG C to prepare sintered clinker; and quenching the sintered clinker, and cooling to 400-700 DEG C within 1-10 minutes, and draining, drying, crushing and grinding to obtain an alkaline fertilizer after quenching. Compared with the prior art, the production process of calcium-magnesia phosphate fertilizer is fewer in used materials, simple in process, strong in maneuverability, stable in product quality, more comprehensive in effective ingredients, and more abundant in nutrient, and contributes to the environmental protection. Meanwhile, the economic benefit is produced.

Description

Technical field: [0001] The invention relates to a method for producing alkaline fertilizer by kiln method, in particular to a method for producing alkaline fertilizer by kiln method of phosphate rock tailings or low-grade phosphate rock, belonging to the technical field of chemical production. Background technique: [0002] In addition to directly using rich phosphorus ore, the phosphate rock required for the production of high-concentration phosphate fertilizer can also be obtained by flotation of medium and low-grade phosphate rock and high-magnesium phosphate rock. The tailings in this process account for 25% to 35% of the total flotation ore. The ore is piled up in the form of tailings slurry; and with the rapid development of high-concentration phosphate fertilizer industry at home and abroad, the accumulation of phosphate rock tailings has caused more and more pollution to the environment. Phosphate ore phenomenon, which leads to a large amount of waste of low-grade p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00
Inventor 胡兆平庞世花刘阳姚华龙宋国发张营
Owner KINGENTA ECOLOGICAL ENG GRP
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