Phosphate tailing-based magnesium-calcium particle and preparation method thereof

A technology for phosphorus tailings and particles is applied in the field of magnesium-calcium particles based on phosphorus tailings and their preparation, so as to achieve the effects of improving hydration resistance, low production cost and realizing resource utilization.

Pending Publication Date: 2021-06-08
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the technology of preparing porous magnesium-calcium

Method used

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  • Phosphate tailing-based magnesium-calcium particle and preparation method thereof
  • Phosphate tailing-based magnesium-calcium particle and preparation method thereof
  • Phosphate tailing-based magnesium-calcium particle and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0030] Example 1

[0031] Magnesium calcium particles based on phosphorus tailings and preparation methods thereof. The preparation method of this embodiment is:

[0032] First, the phosphorus tail mine powder is placed in the tank of the granulation device, activate the granulation equipment, and then add 12 to 20 wt% of the phosphosphorine tail mine powder, granulation; The phosphorus tail mine powder is all converted into particles to stop granulation, take out the particles, stand for 24 to 26 hours, heat insulation under 100 to 110 ° C for 10 to 12 hours; then placed in the heating furnace, at 1500 ~ 1600 ° C under conditions were insulated from 4 to 5 hours, cooled, and magnesium calcium granules based on phosphosphosphosphosphomine category were produced.

[0033] The magnesium-based calcium-based calcium-based calcium-based calcium-based calcium-based calcium particles prepared in this example is detected: the particle diameter of the magnesium-tuning mine is 0.1 to 5 mm; ...

Example Embodiment

[0034] Example 2

[0035]Magnesium calcium particles based on phosphorus tailings and preparation methods thereof. The preparation method of this embodiment is:

[0036] First, the phosphorus tail mine powder is placed in the tank of the granulation device, activate the granulation equipment, and then add 20 to 26% by weight of the phosphosphorus tail mine powder to the tubular tail, granulation; The phosphorus tail mine powder is all converted into particles to stop granulation, take out the particles, stand for 25 to 27 hours, and heat insulation under 105 to 115 ° C for 10 to 12 hours; then placed in the heating furnace, at 1600 ~ 1650 ° C under conditions were held for 3 to 4 hours, cooled, and magnesium calcium particles based on the phosphosphosphosphosphomasin were produced.

[0037] The magnesium-based calcium-based calcium-based calcium-based calcium-based calcium-based calcium particles prepared based on the phosphosphosphorium-tuning mine is 2 to 9 mm; the CaO content o...

Example Embodiment

[0038] Example 3

[0039] Magnesium calcium particles based on phosphorus tailings and preparation methods thereof. The preparation method of this embodiment is:

[0040] First, the phosphorus tail mine powder is placed in the tank of the granulation device, activate the granulation equipment, and then add 26 to 32% by weight of the phosphorus tail mine powder to the tubular tail, granulation; The phosphorus tail mine powder is all converted into particles to stop the granulation, take out the particles, stand for 26 to 28 hours, heat insulation under 110 to 120 ° C for 10 to 12 hours; then placed in the heating furnace, at 1650 ~ 1 to 3 hours under 1700 ° C, cooled to prepare magnesium calcium-based calcium particles based on phosphosphosphosphomasin.

[0041] The magnesium-based calcium-based calcium-based calcium-based calcium-based calcium particles prepared based on the present embodiment are detected: the particle diameter of the magnesium-tuning mine is 6 to 12 mm; the CaO ...

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Abstract

The invention relates to a phosphate tailing-based magnesium-calcium particle and a preparation method thereof. According to the technical scheme, the method comprises the following steps: firstly, putting a phosphate tailing powder into a charging basket of granulation equipment, starting the granulation equipment, then adding water which is 12-32wt% of the phosphate tailing powder into the charging basket, and performing granulation; after the phosphate tailing powder in the charging basket is completely converted into particles, stopping the granulation, taking out particles, and performing standing and drying; and then in a heating furnace, preserving heat at 1500-1700 DEG C for 1-5 hours, and performing cooling to obtain the phosphate tailing-based magnesium-calcium particle. The particle size of the phosphate tailing powder is 1-200 [mu]m; and in the phosphate tailing powder, the content of P2O5 is not more than 2wt%, the content of MgO is not less than 15wt%, and the content of CaO is not less than 25wt%. The method is simple in process, low in cost, environmentally friendly and high in phosphorus tailing recycling degree, and the prepared product is good in hydration resistance, low in phosphorus content, high in porosity, moderate in volume density and high in alkaline slag erosion resistance, has heat insulation performance and fire resistance at the same time, facilitates energy conservation and consumption reduction and meets the requirement for light weight of materials.

Description

technical field [0001] The invention belongs to the technical field of magnesium-calcium granules. In particular, it relates to a magnesium-calcium particle based on phosphorus tailings and a preparation method thereof. Background technique [0002] Phosphorus tailings are solid wastes produced by phosphate rock enterprises through flotation of phosphate rocks. Flotation of 10,000 tons of phosphate rocks will produce 30-40wt% of phosphorous tailings, and the total amount of phosphorous tailings produced every year is very large (Li Jiyong , Tong Xiong, Han Bin, etc. Research Progress on Comprehensive Utilization of Phosphorus Tailings. Mineral Protection and Utilization, 2015, (5): 5-11). The main components of phosphorous tailings after flotation are dolomite, calcite and fluoroapatite, etc. If they are discarded directly, it will cause a huge waste of resources. At present, there have been many studies on the recycling of phosphorous tailings. The following aspects: (1) ...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/043C04B35/057C04B35/447C04B35/626
CPCC04B35/66C04B35/043C04B35/057C04B35/447C04B35/62695
Inventor 魏耀武邓子荣庹康安
Owner WUHAN UNIV OF SCI & TECH
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