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Modifier for deep desulfurization of ferrophosphorus ring

A phosphorus iron ring, deep desulfurization technology, applied in the fields of metal smelting and raw material preparation, can solve the problems of high cost, high alkalinity of desulfurizers and easy to corrode furnace linings, etc.

Active Publication Date: 2021-09-03
UNIV OF SCI & TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current regeneration process is to melt and refine the waste phosphorus iron rings and regulators together for desulfurization operation, but since the sulfur content in the reused phosphorus iron rings needs to be ≤0.05wt%, and the existing desulfurizers need to The cost of the desulfurization agent is high, and the desulfurization agent has a high alkalinity and is easy to corrode the furnace lining. Therefore, it is necessary to develop a deep desulfurization improver with a low cost and a good desulfurization effect.

Method used

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  • Modifier for deep desulfurization of ferrophosphorus ring
  • Modifier for deep desulfurization of ferrophosphorus ring

Examples

Experimental program
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Effect test

Embodiment 1

[0029] In this embodiment, a medium-frequency induction furnace is used, and the element content of the initial waste phosphorus iron ring in this embodiment is 0.121wt%. The dosage of the phosphor iron ring is 450kg, and the ratio of deep desulfurization improver is: 70wt% of cerite and 30wt% of apatite. The addition amount of the phosphorus iron ring deep desulfurization improver is 2.0wt%.

[0030] Melt 450kg of waste iron rings in an induction furnace with a melting temperature of 1430°C. Melt the waste iron rings into a liquid state, and add a deep desulfurization improver for iron rings into the induction furnace. After the improver is melted to liquid, it is refined for 8 minutes, and the slag is removed and released from the furnace. Increase the temperature of the induction furnace to the temperature of the furnace: 1500°C. The improved phosphorus iron ring molten iron is obtained. Sampling was taken to determine the content of phosphorus iron ring elements after re...

Embodiment 2

[0041] Using a medium-frequency induction furnace, the initial low-sulfur phosphorus iron ring element content is as follows, S: 0.097wt%. The amount of the ferrophosphorus ring is 450kg, and the ratio of the deep desulfurization improver for the ferrophosphorus ring is: 80wt% of cerite and 20wt% of apatite. The amount of the deep desulfurization improver for the phosphorus iron ring is 3wt% of that of the phosphorus iron ring. After the iron-phosphorus ring is melted in an induction furnace, a deep desulfurization improver for the iron-phosphorus ring is added, and after 10 minutes of complete melting, it is taken out of the furnace, and samples are taken to determine the element content of the iron-phosphorus ring after refining, S: 0.032wt%.

Embodiment 3

[0043] Using a medium-frequency induction furnace, the initial low-sulfur phosphorus iron ring element content is as follows, S: 0.088wt%. The amount of phosphorus iron ring is 450kg, and the ratio of the phosphorus iron ring deep desulfurization improver is: allanite 75wt%, apatite: 25wt%. The amount of the deep desulfurization improver for the phosphorus iron ring is 1wt% of that of the phosphorus iron ring. After the iron-phosphorus ring is melted in an induction furnace, a deep desulfurization improver for the iron-phosphorus ring is added, and it is released from the furnace 10 minutes after complete melting. Sampling is taken to determine the element content of the iron-phosphorus ring after refining, S: 0.020wt%.

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Abstract

The invention discloses a rare earth element mineral as a modifier for deep desulfurization of a ferrophosphorus ring. The modifier is a mixture comprising specific rare earth element minerals and calcium-containing phosphate minerals. The modifier for deep desulfurization of the ferrophosphorus ring can achieve the goal of low-sulfur ferrophosphorus ring deep desulfurization, and the desulfurization rate can reach 72% or above.

Description

technical field [0001] The invention relates to the fields of metal smelting and raw material preparation, in particular to a modifier for deep desulfurization of phosphorus iron rings. Background technique [0002] The phosphor iron ring is a key component connecting the anode carbon block and the guide rod in the production of electrolytic aluminum, and the phosphor iron ring needs to be replaced regularly. Recycling of waste phosphorus iron rings has become the focus and difficulty of research and development. For the recycling and regeneration of waste phosphorus iron rings, the content control of sulfur element is the key point and key point. The increase of sulfur content will reduce the electrical conductivity and increase the smelting viscosity. The current regeneration process is to melt and refine the waste phosphorus iron rings and regulators together for desulfurization operation, but since the sulfur content in the reused phosphorus iron rings needs to be ≤0.05w...

Claims

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Application Information

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IPC IPC(8): C21C7/064
CPCC21C7/0645
Inventor 王海娟韩钰常朝芦永军卢从辉段新乐
Owner UNIV OF SCI & TECH BEIJING
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