CN105177300A - Method for processing water-quenched copper slag and recycling iron, lead and zinc with rotary kiln - Google Patents
Method for processing water-quenched copper slag and recycling iron, lead and zinc with rotary kiln Download PDFInfo
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- CN105177300A CN105177300A CN201410245141.XA CN201410245141A CN105177300A CN 105177300 A CN105177300 A CN 105177300A CN 201410245141 A CN201410245141 A CN 201410245141A CN 105177300 A CN105177300 A CN 105177300A
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- rotary kiln
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
Provided is a method for processing water-quenched copper slag and recycling iron, lead and zinc with a rotary kiln, and is characterized in that the method comprises the steps: 10-20% of coal and 10-20% of a flux are added in the water-quenched copper slag after flotation of copper; in the rotary kiln, the combustion-supporting wind volume ratio is adjusted to be 60-80% of the air volume needed for theory combustion of pulverized coal combustion, namely 7-9 Nm<3> of combustion-supporting wind is supplied for 1 kg of pulverized coal to control a reaction atmosphere; temperature control sections in the rotary kiln comprise that the temperature of a dry heating section is normal temperature-900 DEG C, the temperature of a reduction section is 900-1150 DEG C, and the temperature of a slow cooling section is 1150-700 DEG C; lead and zinc are reduced and volatilized, then enter flue gas, and are subjected to dust collecting recycling; iron exists in reduction products in the rotary kiln mainly in a metal form, and after cooling, iron is recycled by a conventional magnetic separation method; the water-quenched copper slag after flotation of copper has the copper content of less than 1%, the iron content of 25-40% and the lead and zinc content of 1-5%; the total residence time of the materials in the rotary kiln is controlled to be 2.5-3.5 h. The method has the advantages of achieving the effective recycling of resources and reducing the environmental pollution.
Description
Technical field:
The present invention relates to solid waste regeneration technical field of resource comprehensive utilization, particularly relate to a kind for the treatment of process being reclaimed iron, lead, zinc by rotary kiln from the granulated copper slag after Floatation of Copper.
Background technology:
Along with economic, social development, copper output and copper consumption constantly increase, and producing in the process of smelting various copper products, also discharge a large amount of copper ashes; In copper ashes, its main component contains Cu, Fe, SiO
2, S, and a certain amount of Pb, Zn etc.At present, increasing Chinese scholars begins one's study the valuable metal recovery in copper ashes, but actual apply basic to select copper, the organic efficiency of iron, lead, zinc resource is lower, and economic benefit is not ideal, applies also very limited.
Summary of the invention:
The object of the invention is to overcome the deficiencies in the prior art, fully recycle the granulated copper slag after Floatation of Copper, eliminate and reduce the negative impact that it brings to ecosystem environment, provide a kind of rotary kiln process granulated copper slag to reclaim the method for the plumbous zinc of iron.
The present invention solves the scheme that its technical problem adopts: provide a kind of rotary kiln process granulated copper slag to reclaim the method for the plumbous zinc of iron, it is characterized in that: by the granulated copper slag after Floatation of Copper with addition of appropriate coal dust and flux, strictly in rotary kiln control reaction atmosphere and temperature, wherein plumbous zinc is reduced volatilization and enters in flue gas and carry out recovery of gathering dust; Iron is mainly present in the reduzate in rotary kiln with metallic forms, reduzate reclaims iron by conventional magnetic selection method after cooling; Granulated copper slag copper content after Floatation of Copper is less than 1%, iron-holder 25-40%, leaded, zinc amount 1-5%; Reduzate batching in rotary kiln: copper ashes 60-70%, coal 10-20%, flux 10-20%; In rotary kiln, temperature controlled section is divided into: dry heat section: normal temperature ~ 900 DEG C; Reduction section: 900 ~ 1150 DEG C; Slow cooling section: 1150 ~ 700 DEG C; Rotary kiln temperature sprays into coal dust firing to provide in kiln by kiln hood; The control of kiln atmosphere be by during adjustment coal powder injection burning with addition of combustion air volume realize; The ratio of general adjustment combustion air volume is the 60-80% of the air capacity of the Theoretical combustion needs of coal dust firing, and namely 1kg coal dust is for combustion air 7-9Nm
3; For ensureing that iron more reduces in copper ashes, material residence time total in rotary kiln controls at 2.5-3.5 hour; Be further characterized in that: copper ashes is applicable to the granulated copper slag Iron grade 25 ~ 40% after copper flotation; Coal dust is applicable to various non-coking coal; Flux is applicable to one or more in Wingdale, magnesium limestone, rhombspar, lime as flux.
The invention has the beneficial effects as follows: owing to having recycled iron, lead, the zinc resource in the granulated copper slag after Floatation of Copper, eliminate and decrease its negative impact brought to ecosystem environment, both the effective recycling of resource had been achieved, also decrease environmental pollution, there is good social and economic benefits.
Embodiment:
Below embodiments of the invention are described in further detail: the embodiment of the present invention is that the typical granulated copper slag of certain copper smelting plant is made sample, chooses 10kg (TFe=39.4% altogether; Cu=0.62%; Zn=2.69%; Pb=0.63%) process by method of the present invention, its treating processes is: by the granulated copper slag after copper flotation with addition of 14% lime, 15% coal, abundant mixing, the processing condition simulating rotary kiln in tube type resistance furnace process, and flue gas is reclaimed by dust bag.Many groups experimental data shows that the degree of metalization of iron maintains between 75%-80%, and the recovery rate of zinc reaches 92%, and plumbous recovery rate reaches 85%.Coordinate conventional mill ore magnetic selection technique, can obtain the magnetic material that iron content reaches 78%, the recovery rate of iron reaches 92%.Process by the typical granulated copper slag sample (altogether 10kg) of operational path to certain copper smelting plant of the embodiment of the present invention, obtain the iron ore concentrate 5.3kg of iron content 78% respectively, be rich in Pb-Zn dust 0.5kg (leaded zinc 30%), achieve the comprehensive utilization of granulated copper slag after copper flotation.
Claims (4)
1. the method for the plumbous zinc of rotary kiln process granulated copper slag recovery iron, it is characterized in that: by the granulated copper slag after Floatation of Copper with addition of appropriate coal dust and flux, strictly in rotary kiln control reaction atmosphere and temperature, wherein plumbous zinc is reduced volatilization and enters in flue gas and carry out recovery of gathering dust; Iron is mainly present in the reduzate in rotary kiln with metallic forms, reduzate reclaims iron by conventional magnetic selection method after cooling; Granulated copper slag copper content after Floatation of Copper is less than 1%, iron-holder 25-40%, leaded, zinc amount 1-5%; Reduzate batching in rotary kiln: copper ashes 60-70%, coal 10-20%, flux 10-20%; In rotary kiln, temperature controlled section is divided into: dry heat section: normal temperature ~ 900 DEG C; Reduction section: 900 ~ 1150 DEG C; Slow cooling section: 1150 ~ 700 DEG C; Rotary kiln temperature sprays into coal dust firing to provide in kiln by kiln hood; The control of kiln atmosphere be by during adjustment coal powder injection burning with addition of combustion air volume realize; The ratio of general adjustment combustion air volume is the 60-80% of the air capacity of the Theoretical combustion needs of coal dust firing, and namely 1kg coal dust is for combustion air 7-9Nm
3; For ensureing that iron more reduces in copper ashes, material residence time total in rotary kiln controls at 2.5-3.5 hour.
2. a kind of rotary kiln process granulated copper slag as described in claim 1 reclaims the method for the plumbous zinc of iron, it is characterized in that: copper ashes is applicable to the granulated copper slag Iron grade 25 ~ 40% after copper flotation.
3. a kind of rotary kiln process granulated copper slag as described in claim 1 reclaims the method for the plumbous zinc of iron, it is characterized in that: coal dust is applicable to various non-coking coal.
4. a kind of rotary kiln process granulated copper slag as described in claim 1 reclaims the method for the plumbous zinc of iron, it is characterized in that: flux is applicable to one or more in Wingdale, magnesium limestone, rhombspar, lime as flux.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410245141.XA CN105177300A (en) | 2014-06-04 | 2014-06-04 | Method for processing water-quenched copper slag and recycling iron, lead and zinc with rotary kiln |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410245141.XA CN105177300A (en) | 2014-06-04 | 2014-06-04 | Method for processing water-quenched copper slag and recycling iron, lead and zinc with rotary kiln |
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| CN105177300A true CN105177300A (en) | 2015-12-23 |
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| CN201410245141.XA Pending CN105177300A (en) | 2014-06-04 | 2014-06-04 | Method for processing water-quenched copper slag and recycling iron, lead and zinc with rotary kiln |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106916958B (en) * | 2017-03-15 | 2018-11-09 | 中南大学 | A kind of method of copper smelting slag direct-reduction recycling iron |
| CN109988877A (en) * | 2019-05-15 | 2019-07-09 | 中南大学 | A kind of additive and its application for strengthening copper ashes direct-reduction recycling iron and copper |
| CN110093502A (en) * | 2019-05-15 | 2019-08-06 | 中南大学 | A kind of copper smelting slag cooperates with the method utilized with ferrous manganese ore |
| CN111635149A (en) * | 2020-06-08 | 2020-09-08 | 中国恩菲工程技术有限公司 | Treatment method of copper slag, baking-free water-permeable material and manufacturing method thereof |
| CN112226624A (en) * | 2020-10-22 | 2021-01-15 | 矿冶科技集团有限公司 | Method for co-processing copper slag and zinc slag |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102719676A (en) * | 2012-06-20 | 2012-10-10 | 北京科技大学 | Method for rapidly reducing copper slags to produce iron-copper alloys in kiln in reducing atmosphere |
| CN102719677A (en) * | 2012-06-20 | 2012-10-10 | 北京科技大学 | Method for producing iron-copper alloy micropowder by treating copper smelting slag in oxidizing atmosphere kiln |
| CN102994765A (en) * | 2012-12-06 | 2013-03-27 | 北京中冶设备研究设计总院有限公司 | Method for treating waste copper slag |
-
2014
- 2014-06-04 CN CN201410245141.XA patent/CN105177300A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102719676A (en) * | 2012-06-20 | 2012-10-10 | 北京科技大学 | Method for rapidly reducing copper slags to produce iron-copper alloys in kiln in reducing atmosphere |
| CN102719677A (en) * | 2012-06-20 | 2012-10-10 | 北京科技大学 | Method for producing iron-copper alloy micropowder by treating copper smelting slag in oxidizing atmosphere kiln |
| CN102994765A (en) * | 2012-12-06 | 2013-03-27 | 北京中冶设备研究设计总院有限公司 | Method for treating waste copper slag |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106916958B (en) * | 2017-03-15 | 2018-11-09 | 中南大学 | A kind of method of copper smelting slag direct-reduction recycling iron |
| CN109988877A (en) * | 2019-05-15 | 2019-07-09 | 中南大学 | A kind of additive and its application for strengthening copper ashes direct-reduction recycling iron and copper |
| CN110093502A (en) * | 2019-05-15 | 2019-08-06 | 中南大学 | A kind of copper smelting slag cooperates with the method utilized with ferrous manganese ore |
| CN111635149A (en) * | 2020-06-08 | 2020-09-08 | 中国恩菲工程技术有限公司 | Treatment method of copper slag, baking-free water-permeable material and manufacturing method thereof |
| CN112226624A (en) * | 2020-10-22 | 2021-01-15 | 矿冶科技集团有限公司 | Method for co-processing copper slag and zinc slag |
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Application publication date: 20151223 |
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