Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for recycling vanadium-containing substances in vanadium mud

A material and quality technology, which is applied in the field of vanadium-containing solid waste resource recycling and reuse, can solve the problems of vanadium sludge being difficult to handle, environmental pollution, and inability to comprehensively utilize resources, and achieve the effects of clean production, cost reduction, and efficient utilization.

Active Publication Date: 2022-01-25
HEBEI IRON AND STEEL
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for recycling vanadium-containing substances in vanadium mud, which can solve the existing problems of vanadium mud that are not easy to handle, environmental pollution, and resources cannot be comprehensively utilized.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The method for reclaiming vanadium-containing substance in vanadium mud comprises the following steps:

[0026] (1) Mix the impurity-removing vanadium mud and secondary slag uniformly in proportion to obtain a mixture. The vanadium grade of the mixture is 2.00%, the total content of vanadium element is 20kg, and the ratio of vanadium mud and secondary slag in the mixture is M 泥 / M 渣 0.35; the vanadium grade in vanadium mud is 4.86%, and the passing rate of 120 mesh sieve is ≥70%; the vanadium grade in secondary slag is 1.00%, and the passing rate of 120 mesh sieve is ≥80%;

[0027] (2) Send the mixture into the rotary kiln for roasting. During the roasting process of the rotary kiln, the oxygen content of the roasting atmosphere is 16%, the temperature of the pre-tropical zone is 200°C, accounting for 1 / 3 of the length of the rotary kiln, and the roasting time at this stage is 1.3h; The temperature in the firing zone is 780°C, accounting for 7 / 15 of the length of the r...

Embodiment 2

[0031] (1) Mix the impurity-removing vanadium mud and secondary slag uniformly in proportion to obtain a mixture. The vanadium grade of the mixture is 2.30%, the total vanadium content is 23kg, and the ratio of vanadium mud and secondary slag in the mixture is M 泥 / M 渣 0.45; the vanadium grade in vanadium mud is 4.50%, and the passing rate of 120 mesh sieve is ≥70%; the vanadium grade in secondary slag is 1.30%, and the passing rate of 120 mesh sieve is ≥80%;

[0032] (2) Send the mixture into the rotary kiln for roasting. During the roasting process of the rotary kiln, the oxygen content of the roasting atmosphere is 15.6%, the temperature of the pre-tropical zone is 210°C, accounting for 1 / 3 of the length of the rotary kiln, and the roasting time at this stage is 1.5h; The temperature in the firing zone is 790°C, accounting for 7 / 15 of the length of the rotary kiln, and the firing time at this stage is 2.1h; the temperature in the cooling zone is 340°C, accounting for 1 / 5 of...

Embodiment 3

[0036] (1) Mix the impurity-removing vanadium mud and the secondary slag uniformly in proportion to obtain a mixture, and the vanadium grade of the mixture is

[0037] 2.70%, the total vanadium element content is 27kg, the proportion of vanadium mud and secondary slag in the mixture is M 泥 / M 渣 1; the vanadium grade in vanadium mud is 3.90%, and the pass rate of 120 mesh sieve is ≥70%; the vanadium grade in secondary slag is 1.50%, and the pass rate of 120 mesh sieve is ≥80%;

[0038] (2) Send the mixture into the rotary kiln for roasting. During the roasting process of the rotary kiln, the oxygen content of the roasting atmosphere

[0039] 15.1%, the temperature of the preheating zone is 220°C, accounting for 3 / 10 of the length of the rotary kiln, and the roasting time of this stage is 1.3h; the temperature of the firing zone is 800°C, accounting for 1 / 2 of the length of the rotary kiln, and the roasting time of this stage is 2.1h; the temperature of the cooling zone is 350...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for recycling vanadium-containing substances in vanadium mud, and belongs to the technical field of recycling vanadium-containing solid waste resources. The method includes the following steps: (1) uniformly mixing vanadium mud and secondary slag in proportion to obtain a mixture, The vanadium grade in the mixture is 2.00-3.50%, of which the vanadium-containing grade in the vanadium mud is 3.66-4.86%, and the vanadium-containing grade in the secondary slag is 1.00-1.50%; (2) Send the mixture to a rotary kiln for roasting, and the rotary kiln for roasting During the process, the temperature of the preheating zone is 200°C-300°C, the temperature of the firing zone is 780°C-830°C, and the temperature of the cooling zone is 330°C-430°C; (3) The roasted mixture is washed and extracted with water, filtered to obtain a soluble vanadium solution and filter residue. The invention provides a new recycling channel for secondary roasting of vanadium-containing solid waste, and the recovery rate of vanadium is more than 94%.

Description

technical field [0001] The invention belongs to the technical field of recovery and reuse of vanadium-containing solid waste resources, and in particular relates to a method for recycling vanadium-containing substances in vanadium mud. Background technique [0002] Vanadium slime is solid waste produced during the production of vanadium oxide, which contains a large number of fine ammonium vanadate particles and some incompletely reacted materials. This treatment method cannot recycle the vanadium-containing substances, resulting in a waste of resources. At the same time, a large amount of solid waste is hoarded in the factory building, which not only seriously affects production, but also has an extremely serious environmental protection situation for open-air stacking. With the improvement of people's awareness of environmental protection and energy saving, the treatment and recycling of solid waste has become more and more important. However, vanadium mud contains heavy m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B1/02C22B7/04C22B34/22
CPCC22B7/006C22B1/02C22B7/04C22B34/22Y02P10/20
Inventor 沈国军梁亚军尤金玉秦永峰张红勇张艳艳
Owner HEBEI IRON AND STEEL