CN1346716A - Process for comprehensively treating silver-containing solid waste - Google Patents
Process for comprehensively treating silver-containing solid waste Download PDFInfo
- Publication number
- CN1346716A CN1346716A CN 00129154 CN00129154A CN1346716A CN 1346716 A CN1346716 A CN 1346716A CN 00129154 CN00129154 CN 00129154 CN 00129154 A CN00129154 A CN 00129154A CN 1346716 A CN1346716 A CN 1346716A
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- silver
- paper
- containing solid
- solid waste
- washing
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
A process for treating the silver-containing solid-waste (film) includes such steps as pretreating, cutting, adding enzyme, biochemical treating, recovering film substrate, treating paper substrate, adding flocculant, precipitating and recovering silver. Said step for treating paper substrate includes loosening, beating, separating paper fibres from polyethylene, washing and baking. The silver, paper pulp, polyethylene and acetate fibre can be recovered. Said paper pulp has 0.68 mm of fibre length and 89.8 deg of whiteness.
Description
The present invention relates to a kind of separation method of silver-containing solid waste.
The processing of silver-containing solid waste is the difficult problem of sensitization industry always.Wherein Yin recovery technology is relatively ripe, but existing way is with castoff burning, extracts silver more from the ashes.This method causes topsoil on the one hand, causes the serious waste of efficient resources such as paper substrate, polyethylene, cellulose triacetate base on the other hand.Simultaneously owing to adopt burning method to introduce impurity easily, and can only reclaim thick silver, be difficult to reach the standard of sensitization industry production, more can't handle and reclaim efficient resources such as paper pulp with silver.Adopt open-air landfill for this reason, perhaps consider its paper substrate non-degradable, the transfer that landfill also pollutes is pretended to fuel and is sold the fuel-burning power plant at a low price, still has the problem of resource serious waste.
The object of the present invention is to provide a kind of compliance with environmental protection requirements, do not pollute transfer, realize the process for comprehensively treating silver-containing solid waste that paper pulp effectively separates with polyethylene and sorting is reclaimed.
Processing step of the present invention is as follows:
1, silver-containing solid wastes such as scrap rubber sheet, useless printing paper is put in order;
2, the scrap rubber sheet after the arrangement, useless printing paper shred respectively, enzyme-addedly respectively carry out biochemical treatment, and flocculation sediment is carried out in dosing after biochemical treatment, and the waste water of generation carries out wastewater treatment, and the throw out of generation enters the silver recovery operation and gets silver-colored finished product;
3, the scraps of paper after biochemical treatment enter the paper substrate treatment process, and the activity of the hydrolysate compound of adding high molecular polymer is discongested agent and carried out the loose processing of agent of activity; Base after biochemical treatment directly reclaims;
4, the paper substrate making beating after the loose processing of activity;
5, paper fiber and sub polyethylene from;
6, separating the paper fiber of collecting the back can pack through washing, press filtration, oven dry; Separating the polyethylene of collecting the back can pack through washing, oven dry;
7, washing water reuse or processing discharging.
Above-mentioned silver recovery operation can be undertaken by existing method.
That the present invention utilizes is enzyme-added, biochemical treatment is carried out in dosing, utilize active loose technology, break through traditional sensitization industry silver-containing solid waste treatment process, can reclaim silver, paper pulp, polyethylene and cellulose acetate respectively, silver-colored recovery and purifying had both been realized, reach Eastman Kodak and reclaim the silver amount standard of silver-colored EK10091135, realize again reclaiming paper pulp and poly effectively the separation with sorting, detect through relevant department, its staple length of paper pulp that reclaims reaches 0.68mm, whiteness is 89.8 degree, belongs to the top grade regenerated paper pulp.Both solved the problem of environmental pollution of long-term puzzlement the sector, and reclaimed precious resources such as paper pulp, polyethylene again, the paper pulp of recovery and poly value are about 2 times that the fine silver of recovery is worth.
Embodiment: scrap rubber sheet, useless printing paper are put in order respectively, shredded, and add Sumizyme MP and carry out biochemical treatment, the scrap rubber sheet of changing processing reclaims base, and flocculation sediment is carried out in all the other dosings; Add that the chopping of Sumizyme MP is useless goes into basic solution to PH=8～10 mutually and carry out biochemical treatment, handle the back paper substrate and enter active loose operation, flocculation sediment is advanced in remaining dosing.The waste water of post precipitation carries out wastewater treatment, throw out directly or add that silver-colored mud is dried, roasting, washing, pickling, reduction filtration, white picking, melting and casting get final product the fine silver finished product.The activity that adds the hydrolysate compound of high molecular polymer in the loose operation of activity is discongested agent, makes the loose processing of paper substrate through reagent.Making beating again after the loose operation of activity, and with paper fiber and sub polyethylene from.Paper fiber after the separation can be packed through washing, press filtration, oven dry; Polyethylene after the separation can be packed through washing, oven dry.
Claims (3)
1, process for comprehensively treating silver-containing solid waste is characterized in that its processing step is:
1) silver-containing solid wastes such as scrap rubber sheet, useless printing paper is put in order;
2) the scrap rubber sheet after the arrangement, useless printing paper shred respectively;
3) the scrap rubber sheet after the chopping, useless printing paper are enzyme-added respectively carries out biochemical treatment, and flocculation sediment is carried out in back dosing, and the waste water of generation carries out wastewater treatment, and the throw out of generation enters the silver recovery operation and gets silver-colored finished product;
4) scraps of paper after biochemical treatment enter the paper substrate treatment process, and the activity of the hydrolysate compound of adding high molecular polymer is discongested agent and carried out the loose processing of agent of activity; Base after biochemical treatment directly reclaims;
5) the paper substrate making beating after the loose processing of activity;
6) with paper fiber and sub polyethylene from;
7) separating the paper fiber of collecting the back can pack through washing, press filtration, oven dry; Separating the polyethylene of collecting the back can pack through washing, oven dry;
8) washing water reuse or processing discharging.
2, process for comprehensively treating silver-containing solid waste as claimed in claim 1 is characterized in that said enzyme is a Sumizyme MP.
3, process for comprehensively treating silver-containing solid waste as claimed in claim 1 is characterized in that said medicinal basic solution, and consumption is for adding to PH=8～10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00129154 CN1346716A (en) | 2000-10-08 | 2000-10-08 | Process for comprehensively treating silver-containing solid waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00129154 CN1346716A (en) | 2000-10-08 | 2000-10-08 | Process for comprehensively treating silver-containing solid waste |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1346716A true CN1346716A (en) | 2002-05-01 |
Family
ID=4593332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00129154 Pending CN1346716A (en) | 2000-10-08 | 2000-10-08 | Process for comprehensively treating silver-containing solid waste |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1346716A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1912737B (en) * | 2005-08-11 | 2010-12-29 | 沈建中 | Biotreatment method for waste photographic film |
| CN110466090A (en) * | 2019-09-10 | 2019-11-19 | 珠海市安能环保科技有限公司 | A method of recycling silver and PET film from HW16 waste photographic film |
-
2000
- 2000-10-08 CN CN 00129154 patent/CN1346716A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1912737B (en) * | 2005-08-11 | 2010-12-29 | 沈建中 | Biotreatment method for waste photographic film |
| CN110466090A (en) * | 2019-09-10 | 2019-11-19 | 珠海市安能环保科技有限公司 | A method of recycling silver and PET film from HW16 waste photographic film |
| CN110466090B (en) * | 2019-09-10 | 2021-03-30 | 珠海市安能环保科技有限公司 | Method for recovering silver and PET (polyethylene terephthalate) film from HW16 waste photosensitive film |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |