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Tannery sludge and coal gangue treatment technology
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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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Embodiment 1
[0029] (1) Evenly ball mill the dried tannery sludge;
[0030] (2) evenly ball-milling the dry coal gangue;
[0031] (3) The tannery sludge, coal gangue, cement, kaolin and sodium tetraborate after ball milling are uniformly mixed and stirred according to the ratio of 1:1:4:1:1 by mass;
[0032] (4) add water to the mixed body after stirring and stir into slurry;
[0033] (5) Take sodium lauryl sulfate as foaming agent, put 1% foaming agent of mixture quality in (3) into water, stir then, the solution that stirs is poured into foaming machine, 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 stirred foamed concrete into the mold, and then place it at a normal temperature where the humidity is greater than 80%. Under curing for 3 days, then demoulding;
[0035] (7) Dry the demoulded product in (6) at 105±0.5°C, put it into an electric furnace, keep it at 11...
Embodiment 2
[0038] (1) uniformly ball milling the tanning sludge and coal gangue;
[0039] (2) pulverize waste glass;
[0040] (3) The tannery sludge, coal gangue, waste glass powder, and starch with a water content of 13% after ball milling are mixed and stirred evenly according to the ratio of 2:2:6:1 by mass;
[0041] (4) add 1% boric acid of mixture quality in (3), stir;
[0042] (5) add 1% calciumcarbonate of mixture mass in (3), then stir;
[0043] (6) Pour the mixture prepared in step (5) into the tableting tank, then set the pressure for dry pressing, and start the tabletingmachine for tableting. The pressurization rate is 1kN / s, and the holding time is 30min. After the pressure is released, take out the compressed tablet product;
[0044] (7) Dry the tablet product in (6) at 105±0.5°C, put it into an electric furnace, keep it at 110°C for 40 minutes, then raise it to 600°C at 15°C / min, keep it at 50 minutes, and then 15°C / min to 1100°C for sintering for 60min;
[0045] (8)...
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Abstract
The invention discloses a tannery sludge and coalgangue treatment technology which comprises the steps of evenly mixing and stirring tannery sludge, coalgangue, 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 sodiumdodecyl 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 coalgangue. 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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