Method for recycling chloride process titanium dioxide chlorination furnace blown-out materials containing fine-grain rutile

A titanium dioxide and chlorination technology, applied in the direction of solid separation, etc., can solve the problems of poor powder spheroidization, low spheroidization rate and high calcination temperature

Active Publication Date: 2016-01-20
阿斯创钛业(营口)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The minerals with a titanium content of more than 85% provided by this patent, such as fine-grained white titanium stone, are calcined after granulation, and the temperature range is 1200-1400°C. High, poor spheroidization of powder, low spheroidization rate, high production cost

Method used

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  • Method for recycling chloride process titanium dioxide chlorination furnace blown-out materials containing fine-grain rutile
  • Method for recycling chloride process titanium dioxide chlorination furnace blown-out materials containing fine-grain rutile
  • Method for recycling chloride process titanium dioxide chlorination furnace blown-out materials containing fine-grain rutile

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Experimental program
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Effect test

specific Embodiment 1

[0065] A kind of method that reclaims the chlorination process titanium dioxide chlorination furnace blowing material that contains fine-grained rutile, comprises following beneficiation step:

[0066] ⑴Titanium-containing fine ore that has been deslimed and impurity-removed is obtained through multi-stage shaking table combined gravity separation to obtain concentrated ore TiO 2 92-95% fine-grained rutile.

[0067] (2) The fine-grained rutile concentrate is ground by a ball mill, the ball-to-material ratio is 6:1, the grinding medium is zirconia: microcrystalline alumina 1:2, the average particle size of the powder is 4-8um, the maximum particle size is 30-50um, and the sieve is 325 mesh The powder with a yield of 99.5% is the primary powder.

[0068] (3) First, granulate the above powder into a cue ball: in a high-speed or medium-speed granulator, add the primary powder and water obtained in step 2, the amount of water added is 8-12% (mass percentage) of the powder, and car...

specific Embodiment approach 2

[0077] The multi-stage shaker re-election process in step 1:

[0078] Desilting—wet screening—wet shaker 1—wet shaker 2—wet shaker 3——

[0079] Wet shaker 4—wet shaker 5—wet shaker 6—drying—finished product

[0080] The waste ore is pre-passed through a coarse sieve, the purpose of which is to remove 2-25mm large particles of impurities that do not contain titanium dioxide, 50-80 mesh sieve (270um-180um), and the fine-grained ore screened out, the primary wet shaker gravity separation throws tailings , at this time the raw material is divided into three streams, namely concentrate, medium ore, tailings + carbon powder, TiO 2 92-95% of the concentrate is directly collected into the concentrate slurry tank, the medium ore is transported to the next stage shaker for further gravity separation, and the tailings + carbon powder are transported to the tailings collection pool.

[0081] The second-stage shaker throws tailings from the middlings separated by the first-stage shaker, ...

specific Embodiment approach 3

[0087] Example of eirich granulation experiment:

[0088] Granulation process using German eirich (Eirich) R-type intensive mixer:

[0089]The high-grade fine-grained rutile obtained after purification from waste ore can be re-granulated powder with a pass rate of >99.5% through ball milling to 325 mesh, and the moisture content of the dry powder is <0.5%. Put 2kg of the powder into the eirich R02 (3-5L) intensive mixer, add 0.25%-0.5% polyvinyl alcohol PVA adhesive of the dry powder weight of rutile, mix at high speed for 1-2 minutes, and set the speed of the R02 testing machine 3000r / min, spray tap water evenly while stirring, the amount of water added is 8-10% of the PVA-containing rutile powder, the speed of the eirich granulator is 700r / min, and the time is 15-20min. After the wet balls are dried naturally, they are sieved with 20-80 meshes as samples for calcination, and the one-time ball forming rate can reach 65-85%. Put the 20-80 mesh particles into the dryer for dr...

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Abstract

The invention provides a method for recycling chloride process titanium dioxide chlorination furnace blown-out materials containing fine-grain rutile. Various impurities in rutile-containing waste residues are removed through physical methods such as screening, multi-stage combined shaking table wet process reselection, deposition and drying, and titanium-rich materials containing 92% to 95% of titanium dioxide are regained. The method belongs to physical concentration methods, and is suitable for recycling, concentrating and recycling waste materials. The recycling rate of waste residues can reach up to 25% to 40% due to different titanium contents of waste residues. Rutile particles obtained through the method are fine, are ground, milled, granulated, screened, dried, sintered and screened till the particle size reaches 840 micrometers to 178 micrometers (20 to 80 mesh) and are sintered into spheres at a temperature of 1100 DEG C to 1160 DEG C. The circular degree of the rutile particles is larger than 0.8, the volume density of the rutile particles ranges from 1.65 to 1.71, and the content of sintered balls with the strength lower than 28 MPa is smaller than 40%. The titanium dioxide content of rutile processed through the method ranges from 92% to 95%, and 100% of the physical phase is rutile. The regenerated high-grade raw material can be used for chloride process titanium dioxide and processed into titanium yellow materials or directly used for producing titanium yellow materials.

Description

technical field [0001] The invention relates to the technical field of mineral treatment, in particular to a method for recycling industrial waste residues, in particular to a method for producing high-grade rutile by recycling, selecting and granulating waste residue containing fine-grained rutile. Background technique [0002] Rutile mine is the main industrial type of rutile mine in my country, which accounts for 86% of the total reserves of rutile resources. my country's primary rutile has low grade, fine particle size, complex mineral composition and poor selectivity, low yield, large-scale development and utilization is difficult, and rutile placer resources are in short supply. So far, most high-grade rutile raw materials need to be imported, and its quality mainly depends on The content and particle size of rutile-type titanium dioxide. At present, there are still rutiles with fine particle sizes that cannot be counted at home and abroad. They exist in waste residues,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/24C22B1/00B03B9/00
Inventor 塞缪尔·亚历山大亚历山大·布朗康蓉周奎简平
Owner 阿斯创钛业(营口)有限公司
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