Method for treating floatation tailings of waste magnesite-chrome refractory material

A technology for refractory materials and tailings, which is applied in the field of comprehensive recycling of refractory materials, can solve problems such as affecting the performance of refractory materials, affecting the production line, affecting the environment, etc., and achieves the effect of realizing reuse, preventing the impact of the environment, and a simple method.

Inactive Publication Date: 2018-01-12
CENT SOUTH UNIV
View PDF1 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existence of arsenic and antimony will seriously affect the reutilization of tailings to make bricks. On the one hand, because the melting point and boiling point of arsenic and its compounds, antimony and its compounds are lower than those of refractory materials, in the process of refractory material production, It will cause holes inside the refractory material and affect the performance of the refractory material; on the other hand, arsenic and its oxides have certain toxicity. In the refractory material production line, if there is volatilization of arsenic, it will seriously affect the environment and affect the entire production line

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for treating floatation tailings of waste magnesite-chrome refractory material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The raw material used is the discarded furnace lining of a silver smelting furnace in a lead smelter in Hunan - magnesia-chromium refractory bricks, and the flotation tailings after the main metals are recovered through the flotation process. The tailings contain 0.54% As and 3.13% Sb.

[0028] Take the flotation tailings, after being filtered by a vacuum filter, place them in an electric blast drying oven for drying at 80°C, and grind the obtained dry tailings in an agate grinder for 20 minutes to make them evenly dispersed and make them 85-90% of the particles are smaller than 0.074mm in size. The concentration is 5mol / L dilute hydrochloric acid, the tailings and dilute acid solution are mixed evenly according to the weight percentage of 20:1, and the standing time is 12h.

[0029] Grind the coarse reductant coke powder with a vibration mill for 0.5min to make the particle size less than 0.15mm. The acid-treated tailings, coke powder and magnesium chloride are mixed ...

Embodiment 2

[0032] The raw material used is the discarded furnace lining of a lead smelting furnace in a lead smelting plant in Hunan - magnesia-chromium refractory bricks, and the flotation tailings after the main metals are recovered through the flotation process. The tailings contain 0.95% As and 1.88% Sb.

[0033] Take the flotation tailings, after being suction filtered by a vacuum filter, place them in an electric blast drying oven for drying at 70°C, and grind the obtained dry tailings in an agate grinder for 40 minutes to make them evenly dispersed and make them 85-90% of the particles are smaller than 0.074mm in size. The concentration of the preparation is 6mol / L dilute hydrochloric acid, the tailings and the dilute acid solution are mixed evenly according to the weight percentage of 20:0.8, and the standing time is 11h.

[0034] Grind the coarse reductant carbon powder with a vibration mill for 0.8min to make the particle size less than 0.15mm. The acid treatment tailings, car...

Embodiment 3

[0037] The raw material used is the discarded furnace lining of a lead smelting furnace in a lead smelting plant in Hunan - magnesia-chromium refractory bricks, and the flotation tailings after the main metals are recovered through the flotation process. The tailings contain 0.75% As and 1.38% Sb.

[0038] Take the flotation tailings, after being suction filtered by a vacuum filter, place them in an electric blast drying oven for drying at 60°C, and grind the obtained dry tailings in an agate grinder for 40 minutes to make them evenly dispersed and make them 85-90% of the particles are smaller than 0.074mm in size. The configuration concentration is 4mol / L dilute sulfuric acid, the tailings and dilute acid solution are mixed evenly according to the weight percentage of 20:1.2, and the standing time is 10h.

[0039] Grind the coarse reducing agent graphite powder with a vibrating mill for 1 min to make the particle size smaller than 0.15 mm. Mix acid treatment tailings, graphite...

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

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
boiling pointaaaaaaaaaa
boiling pointaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for treating floatation tailings of a waste magnesite-chrome refractory material. The method comprises the following steps: 1) preparing floatation tailings powder ofthe waste magnesite-chrome refractory material; 2) performing acid treatment on the tailings powder in step 1); 3) preparing a chlorinating agent and a carbonaceous reducing agent; 4) mixing the tailings powder after acid treatment, the chlorinating agent and the carbonaceous reducing agent, grinding the mixture, uniformly mixing the mixture, putting the mixture into a tube type resistance furnaceat an air atmosphere, guiding an exhaust pipe of the tube type furnace into a gas washing bottle containing sodium hydroxide solution, roasting the gas washing bottle, recycling volatile components in roasting, taking out residual tailings and cooling the residual tailings as a regenerative raw material of the refractory material. The method is simple, arsenic and antimony can be effectively separated and recycled, the refractory material is recycled, and the influence of discharge of arsenic and arsenic compounds, chromium and chromium compounds, antimony and antimony compounds and the likeon environment can be prevented, so that the method has remarkable economic and environmental benefits.

Description

technical field [0001] The invention belongs to the field of comprehensive recovery and utilization of refractory materials in nonferrous metal smelting, and in particular relates to a method for processing waste magnesia-chromium refractory material flotation tailings. Background technique [0002] Magnesia-chrome bricks have the characteristics of high temperature resistance, high strength, excellent thermal shock resistance, and strong corrosion resistance to alkaline slag, making them the most commonly used refractory materials in the non-ferrous metal smelting industry. During pyrometallurgical smelting of nonferrous metallurgy, SO 2 There is a lot of gas, the furnace is in an acidic atmosphere, the metal melt has good fluidity, it is easy to corrode the furnace lining, and destroy the performance of the refractory material. Therefore, nearly 3 million tons of waste magnesia bricks are produced in my country every year. [0003] At present, the treatment of waste magne...

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 Applications(China)
IPC IPC(8): C04B35/66C04B35/63C04B35/626C04B35/622
Inventor 焦芬覃文庆刘维薛凯徐探
Owner CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap