Black ceramic material and preparation method thereof

A technology of black ceramics and ceramic materials, applied in fluidized bed furnaces, etc., can solve the problems of unutilized vanadium extraction tailing iron, waste of chromium and manganese resources, and unutilized slag, so as to achieve less sodium and salt content, reduce Effect of reduction temperature and energy consumption reduction

Active Publication Date: 2014-09-17
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The advantage of literature [1] and [2] is that the vanadium extraction tailings are made into black ceramics, but the disadvantage is that the iron in the vanadium extraction tailings is not utilized, and the literature [2] also needs to add chromite and manganese oxide ore, It is a waste of chromium and manganese resources
The advantage of literature [3] and [4] is that the iron in the vanadium extraction tailings is extracted, and the disadvantage is that the remaining slag after iron extraction is not utilized
And the iron, manganese and chromium in the reduced vanadium extraction slag can be magnetically separated out by magnetic separation method described in document [4], but only iron can be magnetically separated out, and manganese and chromium, because of their interatomic self The spins tend to be arranged in opposite directions, and the magnetic moments between atoms are low and cancel each other. It is an antiferromagnetic substance, so it is impossible to magnetically separate manganese and chromium by magnetic separation.

Method used

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Examples

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preparation example Construction

[0058] In the above preparation method of magnetic separation tailings, the pellets are dried in the sun for 12-72 hours or at 50-250° C. for 2 hours-42 hours.

[0059] Preferably, in the above-mentioned method for preparing tailings from magnetic separation, the pellets are dried at 100° C. for 12 hours.

[0060] In the above preparation method of magnetic separation tailings, the pellets are reduced in a reduction furnace, and the reduction furnace is a rotary hearth furnace, a tube furnace or a muffle furnace.

[0061] Preferably, when the pellets are reduced in the muffle furnace, a carbonaceous reducing agent should be filled around the pellets.

[0062] Preferably, in order to prevent the metal from being oxidized when the pellets are reduced, the atmosphere of the pellets in the furnace is a non-oxidizing atmosphere.

[0063] In the above method for preparing magnetically separated tailings, the pellets are broken into powders with a particle size of ≤0.165 mm.

[006...

Embodiment 1

[0082] Reduction magnetic separation treatment of vanadium extraction tailings: Weigh 1000g of vanadium extraction tailings, 105g of graphite powder, add 200ml of sodium carbonate solution with a concentration of 1.87mol / L and mix evenly; then press this mixture into pellets; After drying under high temperature for 12 hours, take the dried pellets and put them in a tube furnace at 1220°C under a nitrogen atmosphere for 4 hours to obtain a metallization rate of 88.3%; the reduced pellets are broken into powders with a particle size of 0.165mm at a magnetic induction of 55mT The next time you choose reduced iron powder and non-magnetic substances.

[0083] The titanium-selected tailings were calcined at 1100°C for 10 minutes and crushed to a particle size of 0.198mm.

[0084] Take 100g of magnetic separation tailings, 50g of vanadium-titanium-magnetite titanium-separation tailings, and 10g of Xigeda soil, and mix these three solid materials evenly; ball mill in a ball mill for 8...

Embodiment 2

[0086] Reduction magnetic separation treatment of vanadium extraction tailings: Weigh 1000g of vanadium extraction tailings, 105g of graphite powder, add 200ml of sodium carbonate solution with a concentration of 1.87mol / L and mix evenly; then press this mixture into pellets; After drying under high temperature for 12 hours, the dried pellets were kept in a tube furnace at 1220° C. under an argon atmosphere for 4 hours to obtain a metallization rate of 88.3%. The reduced pellets are crushed into powders with a particle size of 0.165 mm and the magnetic induction intensity is 55 mT for next selection to obtain reduced iron powder and non-magnetic substances.

[0087] The titanium-selected tailings were calcined at 1100°C for 10 minutes and crushed to a particle size of 0.198mm.

[0088] Take 200g of magnetic separation tailings, 50g of vanadium-titanium magnetite titanium ore tailings, and 10g of Xigeda soil, and mix these three solid materials evenly. Ball milled in a ball mi...

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Abstract

The invention relates to a black ceramic material and a preparation method thereof and belongs to the inorganic nonmetallic material field. The black ceramic material comprises the following components in parts by weight: 1.82-3.7 parts of Gr2O3, 10.9-18.18 parts of TiO2, 1.94-4.13 parts of V2O5, 6.06-11.91 parts of MnO, 8-14 parts of Fe2O3, 0.001-0.01 part of Ni and 12-24.3 parts of SiO2. The black ceramic material is sintered by use of mill tailings and vanadium extraction tailings as the raw materials, and the solar absorptivity of the obtained black ceramic material is 0.85-0.90.

Description

technical field [0001] The invention relates to a black ceramic material and a preparation method thereof, belonging to the field of inorganic non-metallic materials. Background technique [0002] my country's vanadium-titanium magnetite has been mined and selected, and the remaining ore tailings after separating iron concentrate and titanium concentrate have no effective comprehensive utilization methods so far. They have been piled up as waste, which not only pollutes the environment, but also occupies a large amount of land. . [0003] Vanadium extraction tailings (vanadium slag is prepared from vanadium-titanium magnetite, vanadium salts are leached from the vanadium slag, and the remaining residue is called vanadium extraction tailings) is also a large amount of industrial waste piled up, which also contains 32 -37% iron, for the comprehensive utilization of vanadium extraction tailings, there are many methods. Such as document [1], the publication number is CN86104984...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/12C22C1/04C22B1/245C21B13/00
Inventor 方民宪李国伟王能为陈敏
Owner PANZHIHUA UNIV
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