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Method for preparing porous ceramsite filter material by using lepidolite extracted lithium slag

A technology for extracting lithium slag and porous pottery, which is applied in separation methods, chemical instruments and methods, filtration separation, etc., can solve the problems of poor film-hanging performance of plastic fillers, large water flow resistance, and easy aging, and achieves simplified production processes and high production efficiency. The effect of low cost and saving grinding energy consumption

Inactive Publication Date: 2011-07-20
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These fillers have defects to varying degrees, such as irregular fillers with high water flow resistance and easy to block; plastic fillers have poor film-hanging performance and are easy to age.
However, the lithium oxide in lepidolite only accounts for 4% to 5% of the lepidolite ore, and the extraction amount is only about 3%. The amount of waste residue after only extracting lithium is as high as more than 95%, and the amount of slag produced is very large. Therefore, it is effective to extract lithium slag. Comprehensive utilization of this mineral is of great significance for energy saving, emission reduction and clean production of lithium extraction technology

Method used

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  • Method for preparing porous ceramsite filter material by using lepidolite extracted lithium slag
  • Method for preparing porous ceramsite filter material by using lepidolite extracted lithium slag
  • Method for preparing porous ceramsite filter material by using lepidolite extracted lithium slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The product formula (in terms of mass percentage) is: 70% of press-impregnated lithium slag (moisture ≤ 30%), 27% of clay powder, 1% of carbon powder, and 2% of calcium carbonate powder.

[0021] Preparation Process:

[0022] (1) Make a cue ball of ф1-2mm in a blender by pressing lithium slag and clay powder;

[0023] (2) Roll the cue ball into a spherical particle of ф3-10mm in the granulator;

[0024] (3) Feed the pellets into the pre-calcination section of the rotary kiln and pre-fire at 200-500°C for 10-20 minutes, then enter the firing zone and calcinate at 1050-1180°C for 10-30 minutes;

[0025] (4) After leaving the kiln, the red-hot ball enters the single-cylinder cooler to cool and then the product is obtained.

[0026] The performance index of the product is shown in Table 2.

[0027] Table 2 Technical performance indicators of pressure immersion lithium slag ceramsite filter material

[0028]

Embodiment 2

[0030] The ratio of raw materials is as follows: 65% of press-impregnated lithium slag (30% of water content), 27% of clay powder, 1% of carbon powder, and 2% of waste glass powder. Technological process is the same with embodiment 1.

Embodiment 3

[0032] The ratio of raw materials is as follows: 60% of pressing lithium slag (30% of water content), 37% of clay, 2% of bran powder, and 1% of calcium carbonate powder. Technological process is the same with embodiment 1.

[0033] Some performance technical indicators of the products of Examples 2 to 3 are shown in Table 3.

[0034] Table 3 Some performance indicators of different example products

[0035]

[0036] *Take 10 ф8mm±1mm material balls to measure the compressive strength on the electronic universal testing machine, and take the average value.

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Abstract

The invention discloses a method for preparing a porous ceramsite filter material by using lepidolite extracted lithium slag. The lithium slag extracted by a lepidolite sodium chloride pressure digestion method is used as a main raw material. The method comprises the following steps of: adding partial ground clay powder serving as a plasticizer, adulterating a little amount of pore forming agent (one or two of carbon powder, bran powder, calcium carbonate powder and waste glass powder), balling, sintering and sintering. The filter material has the characteristics of low stacking density, high porosity, uniform pore distribution, high cylinder pressure strength and long service life. The method can simplify the production process and reduce the production cost, is favorable for pollution-free production of a lepidolite mineral lithium extracting process, and has significance for resource recycle and environmental friendliness.

Description

technical field [0001] The invention belongs to the technical field of industrial waste utilization and waste water purification treatment materials, and relates to a method for preparing porous ceramsite filter material by using lepidolite slag extracted from lithium. Background technique [0002] For a long time, the filter fillers in my country's sewage treatment process mainly use irregular fillers such as sand, gravel, coke, slag, anthracite, and plastic honeycomb fillers, corrugated fillers and fiber fillers. These fillers have defects to varying degrees, such as irregular fillers with high water flow resistance and easy to block; plastic fillers have poor film-hanging performance and are easy to age. The biological aerated filter sewage treatment process that did not emerge in the 1980s has been widely used in developed countries abroad. In the middle and late 1990s, my country began to apply this process. Most of the fillers used are clay as the main raw material and...

Claims

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Application Information

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IPC IPC(8): B01D39/06
Inventor 黄少文黎奉武
Owner NANCHANG UNIV
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