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A method for promoting the aggregation and growth of phosphorus-enriched phase particles in dephosphorization slag

A particle aggregation and enrichment phase technology, applied in the direction of improving process efficiency, can solve the problems of small particles, poor magnetic separation effect, accelerated mutual aggregation of phosphorus enrichment phase particles, etc., to achieve simple operation, real results, and operation. Simple and convenient effects

Active Publication Date: 2019-08-09
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Adopting the device and method of the present invention can accelerate the mutual aggregation and growth of phosphorus-rich phase particles to form large-sized particles; overcome the dispersed distribution of phosphorus-rich phase in the dephosphorization slag, and the particles are small, which leads to magnetic separation in the later stage. Problems with poor separation

Method used

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  • A method for promoting the aggregation and growth of phosphorus-enriched phase particles in dephosphorization slag
  • A method for promoting the aggregation and growth of phosphorus-enriched phase particles in dephosphorization slag
  • A method for promoting the aggregation and growth of phosphorus-enriched phase particles in dephosphorization slag

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Embodiment 1

[0056] See attached figure 1 , the present invention is a device for promoting the aggregation and growth of phosphorus-enriched phase particles in dephosphorization slag, the shown device includes an electric pulse generating system and a heating furnace 4; the shown electric pulse generating system consists of an electric pulse generator 1, an electrode 2, The electrode bracket 3 is composed of; the heating furnace 4 is provided with a crucible 5, the electrode 2 is installed on the electrode bracket 3, one end is electrically connected with the electric pulse generator 1, and the other end extends into the crucible 5; the electrode bracket 3 It consists of a base 6, a vertical bar 7, and a cross bar 8. The vertical bar 7 is vertically installed on the base 6. One end of the cross bar 8 is movably connected with the vertical bar 7, and the other end is installed with an electrode 2

[0057] There are two electrodes, which are installed on the cross bar 8, and the distance be...

Embodiment 2

[0060] A method for promoting the aggregation and growth of phosphorus-enriched phase particles in dephosphorization slag is to place the slag sample in the crucible of the device for promoting the aggregation and growth of phosphorus-enriched phase particles in dephosphorization slag described in Example 1, and heat After the slag sample is melted, the temperature is lowered at a cooling rate of 9-12°C / min until a solid phase appears in the melt, then the cooling is stopped, and the temperature is maintained at this temperature to obtain a multiphase slag system in which solid and liquid phases coexist. The slag system refers to a two-phase system in which only the phosphorus-enriched phase is a solid phase and the rest of the components are a liquid phase; then, insert electrodes into the melt, adjust the distance between electrodes and the depth of insertion into the melt, and start the electric pulse generator to After applying a pulse current to the electrode for at least ...

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Abstract

The invention discloses a method for promoting phosphorus enrichment phase particles in dephosphorization slag to grow up. The method comprises the steps that slag samples are placed into a crucible,heated, molten, then cooled till solid phases exist in the melt, and subjected to heat preservation; an electric pulse generator is started to apply pulse current to an electrode inserted into the melt for at least 2 min, the electrode is taken out, the crucible is placed in air to be naturally cooled to indoor temperature, and solid slag is obtained; since phosphorus enrichment phases and liquidphases have obvious conductivity differences, the phosphorus enrichment phases are subjected to acting force in the direction perpendicular to the current direction so as to be moved towards upper andlower surfaces; the phosphorus enrichment phase particles which are conglomerated and grow up are located on the bottom and upper surface of the solid slag, and the purpose that the phosphorus enrichment phases in the slag samples are obviously conglomerated and grow up is achieved. The problem that the phosphorus enrichment phases are distributed in a dispersed mode in the dephosphorization slag, particles are small, and therefore the later-period magnetic separation effect is poor is solved. The device has the advantages of being reasonable in structure, easy and convenient to operate, capable of achieving energy conservation and environment protection and low in energy consumption.

Description

technical field [0001] The invention relates to a method for promoting the growth of phosphorus-enriched phase particles in dephosphorization slag, and belongs to the technical field of comprehensive utilization of metallurgical slag. Background technique [0002] Phosphorus is an important strategic resource, and the demand for phosphorus resources in the world is increasing day by day. Phosphate rock is a non-renewable resource. With the increase of mining volume, phosphate rock resources are close to exhaustion. Phosphate rock has been listed as one of the 20 kinds of minerals that cannot meet the needs of national economic development after 2010. It is urgent to seek potential phosphate rock resource substitutes. [0003] The dephosphorization slag produced in the steelmaking process usually contains about 2%-5% P 2 o 5 , and with the increase of the proportion of high phosphorus iron ore, where P 2 o 5 content showed an increasing trend. If the phosphorus in the d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/064
CPCC21C7/064Y02P10/20
Inventor 王万林谢森林黄道远谢井张磊应国民余杰吕培生戴诗凡潘子航覃华军
Owner CENT SOUTH UNIV
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