Tannery sludge and coal gangue treatment technology

A technology of tanning sludge and coal gangue, which is applied in clay products, ceramic products, applications, etc., can solve the problems of large resource consumption and high processing costs, and achieve huge benefits and full use of resources

Inactive Publication Date: 2017-06-20
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the incineration method is that the proc

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] Example 1

[0029] (1) Ball mill the dried tannery sludge evenly;

[0030] (2) Ball mill the dried coal gangue evenly;

[0031] (3) Mix the tannery sludge, coal gangue, cement, kaolin and sodium tetraborate after ball milling uniformly according to the mass ratio of 1:1:4:1:1;

[0032] (4) Add water to the evenly stirred mixture to form a slurry;

[0033] (5) Using sodium lauryl sulfate as the foaming agent, put 1% of the foaming agent by mass of the mixture in (3) into the water, then stir evenly, pour the stirred solution into the foaming machine, and then Start the foaming machine for foaming;

[0034] (6) Mix the slurry made in step (4) with the foam made in step (5), stir with a mixer for 5 minutes, then pour the mixed foam concrete into the mold, and then place it at room temperature with a humidity greater than 80% Curing for 3 days, then demoulding;

[0035] (7) Dry the demoulded product in (6) at 105±0.5℃, put it in an electric furnace, keep it at 110℃ for 20min, then ra...

Example Embodiment

[0037] Example 2

[0038] (1) Ball mill the tannery sludge and coal gangue evenly;

[0039] (2) Crush and grind waste glass;

[0040] (3) Mix the tannery sludge, coal gangue, waste glass powder, and starch with 13% water content after ball milling uniformly according to the mass ratio of 2:2:6:1;

[0041] (4) Add boric acid of 1% of the mass of the mixture in (3), and stir evenly;

[0042] (5) Add 1% calcium carbonate of the mass of the mixture in (3), and then stir evenly;

[0043] (6) Pour the mixture prepared in step (5) into the tablet pressing tank, then set the pressure for dry pressing, and start the tablet press for tablet pressing, the pressurizing rate is 1kN / s, and the holding time is 30min. After the pressure is released, take out the compressed product;

[0044] (7) Dry the tablet product in (6) at 105±0.5℃, put it in an electric furnace, keep it at 110℃ for 40min, then raise it to 600℃ at 15℃ / min, keep it for 50min, and then Sintering at 15℃ / min to 1100℃ for 60min;

[0045]...

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PUM

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Abstract

The invention discloses a tannery sludge and coal gangue treatment technology which comprises the steps of evenly mixing and stirring tannery sludge, coal gangue, cement, kaolin and sodium tetraborate which are evenly ball milled according to the mass ratio of 1 to 1 to 4 to 1 to1; then adding water to stir into slurry; utilizing sodium dodecyl sulfate as a foaming agent, pouring the stirred foam concrete into a mould, then conserving for 3 to 5 days in normal temperature in humidity larger than 80% and then demoulding; drying a demoulded product under the condition of 105+/-0.5 DEG C, putting into an electric furnace to be kept warm for 20 to 40min in 110 DEG C, then heating to 600 DEG C at 15 DEG C/min, keeping warm for 30 to 60min, then heating to 1100 to 1200 DEG C at 15 DEG C/min and sintering for 30 to 60min; slowly cooling to room temperature after sintering finishes and manufacturing into a porous ceramic tile.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a treatment technology for tannery sludge and coal gangue. Background technique [0002] Tannery sludge is a by-product of the tannery industry. There are two main sources. One is that in the process of tannery production, a series of chemical and mechanical treatments are required to convert raw hide into leather. Tannery is the main product used in the early stage of leather processing. As a tanning agent, tanneries generally use basic chromium sulfate as a tanning agent, which converts collagen fibers into leather by combining with raw hide protein. The utilization rate of chrome tanning agent is not high in the tanning process, and 30% to 40% of chromium salts fail to participate in the reaction, and the chromium remains in the tanning liquor and is discharged into the sewage. Chrome sludge. The second is tannery sludge formed after biochemical treatment of...

Claims

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Application Information

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IPC IPC(8): C04B38/10C04B33/132C04B33/32C04B38/02
CPCC04B33/132C04B33/1321C04B33/1324C04B33/1328C04B33/32C04B38/02C04B38/10C04B2235/3208C04B2235/3409C04B2235/6562C04B2235/6567Y02P40/60
Inventor 王莉万玉山
Owner CHANGZHOU UNIV
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