CN115652102A - Method for treating arsenic slag produced in copper smelting process of austenite furnace - Google Patents
Method for treating arsenic slag produced in copper smelting process of austenite furnace Download PDFInfo
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- CN115652102A CN115652102A CN202211319662.6A CN202211319662A CN115652102A CN 115652102 A CN115652102 A CN 115652102A CN 202211319662 A CN202211319662 A CN 202211319662A CN 115652102 A CN115652102 A CN 115652102A
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention belongs to the field of smelting, and particularly relates to a method for treating arsenic slag produced by an ore furnace copper smelting process, which comprises the following steps: (1) Uniformly mixing the arsenic slag and the raw material copper concentrate of the flash copper smelting process to form mixed ore; (2) Carrying out smelting operation, blowing operation, refining operation and electrolysis operation on the mixed ore in sequence, and observing the surface condition of a negative plate; (3) Gradually increasing the doping proportion of the arsenic slag in the mixed ore, repeating the step (2) until a critical point of a rough phenomenon appears on the surface of the cathode plate in the electrolytic operation process, taking the critical point as an arsenic saturation point of the flash copper smelting process, and calculating the saturation value of the arsenic content in the mixed ore at the moment; (4) Adding the arsenic slag into the flash copper smelting process for circular treatment according to the amount that the arsenic content in the mixed ore does not exceed the arsenic saturation value. Above-mentioned scheme not only can practice thrift the outsourcing of arsenic sediment and deal with the expense, has also retrieved valuable metal simultaneously, reduces the safe environmental protection risk of hazardous waste transfer in-process, and does not influence the quality of cathode copper.
Description
Technical Field
The invention belongs to the field of smelting, and particularly relates to a method for treating arsenic slag, which is mainly used for treating arsenic slag produced in an ore furnace copper smelting process.
Background
In the purification process of the flue gas produced in the copper smelting operation, the arsenic slag, also called arsenic filter cake, is formed after the enrichment of gaseous arsenic phases in the soot and the flue gas. The arsenic slag contains 5-10% of arsenic and also contains valuable metals such as copper, rhenium and the like. Arsenic slag has water-soluble toxicity and corrosivity, belongs to national hazardous waste, and therefore must be treated by qualified manufacturers. Taking the nonferrous metal group of the cuprum mausoleum of the inventor as an example, the produced arsenic slag is entrusted to other manufacturers for processing, thousands of dollars of processing cost and transportation cost are paid per ton, nearly ten thousand tons of arsenic slag are produced every year, and thousands of dollars of processing cost are paid per ton of arsenic slag, so that not only is the loss of valuable metals in the arsenic slag caused, but also the environment is damaged due to the leakage of the arsenic slag in the transportation process.
Disclosure of Invention
The invention aims to provide a method for treating arsenic slag produced in an ore furnace copper smelting process, which can circulate part of arsenic slag in a smelting plant, reduce the cost of entrusted treatment of the arsenic slag and reduce the loss of valuable metals.
In order to realize the purpose, the method adopts the technical scheme that: a method for treating arsenic slag produced by an Otto copper smelting process comprises the following steps:
(1) Uniformly mixing arsenic slag and raw material copper concentrate of a flash copper smelting process to form mixed ore;
(2) Carrying out smelting operation, blowing operation, refining operation and electrolysis operation on the mixed ore in sequence, and observing the surface condition of a negative plate;
(3) Gradually increasing the doping proportion of the arsenic slag in the mixed ore, repeating the step (2) until a critical point of a rough phenomenon appears on the surface of the cathode plate in the electrolytic operation process, taking the critical point as an arsenic saturation point of the flash copper smelting process, and calculating the saturation value of the arsenic content in the mixed ore at the moment;
(4) And adding the arsenic slag into the flash copper smelting process according to the amount that the arsenic content in the mixed ore does not exceed the arsenic saturation value for circular treatment.
In the step (3), after the arsenic saturation point of the flash copper smelting process is determined, the arsenic removal rates of the refining stage, the flash converting stage and the flash smelting stage in the flash copper smelting process are reversely deduced according to the saturation point, and the arsenic content in the mixed ore added during flash smelting is controlled not to exceed the saturation value according to the arsenic removal rate of each stage.
By adopting the scheme, outsourcing treatment cost of the arsenic slag can be saved, valuable metals are recycled, safety and environmental protection risks in the transferring process of hazardous wastes are reduced, and the arsenic reaches an unsaturated stable circulating state in a flash copper smelting process system without influencing the quality of cathode copper.
The technical scheme of the invention is mainly used for treating the arsenic slag produced by the copper smelting process of the Olympic furnace and can also be used for treating other arsenic slag with similar properties.
Detailed Description
The technical solution of the present invention is further described below with reference to examples.
A method for treating arsenic slag produced by an Otto copper smelting process comprises the following steps:
(1) Uniformly mixing arsenic slag and raw material copper concentrate of a flash copper smelting process to form mixed ore;
(2) The mixed ore is sequentially subjected to smelting operation, blowing operation, refining operation and electrolysis operation, the surface condition of a cathode plate is observed,
(3) Gradually increasing the doping proportion of the arsenic slag in the mixed ore, repeating the step (2) until a critical point of a rough phenomenon appears on the surface of the cathode plate in the electrolytic operation process, taking the critical point as an arsenic saturation point of the flash copper smelting process, and calculating the saturation value of the arsenic content in the mixed ore at the moment;
(4) Adding the arsenic slag into the flash copper smelting process for circular treatment according to the amount that the arsenic content in the mixed ore does not exceed the arsenic saturation value.
Examples
The arsenic slag source is as follows: the component analysis of arsenic slag produced by the ore furnace copper smelting process of the bronze tomb nonferrous metal group Jinguan copper industry division: h 2 O：58-65％，Cu：0.5-4％，As：37-45％，S：32-40％。
The test process comprises the following steps: flash copper smelting process for the bronze industry division of bronze crown of the nonferrous metal group of bronze tomb.
The process is summarized as follows: the flash copper smelting process for the gold crown copper industry mainly comprises flash smelting and flash converting, wherein copper concentrate, quartz sand, arsenic slag and other materials in a return smelting furnace in different proportions are mixed together to form dry ore, the arsenic content of the mixed various concentrates is 0.3-0.4%, and only arsenic slag in other parts has arsenic element. Dry ore is put into a flash smelting furnace according to the total amount of 265t/h for reaction to produce copper matte and smelting slag, the smelting slag is subjected to ore dressing process for further flotation, the copper matte enters a next flash converting furnace, 85t/h of the copper matte enters the converting furnace for reaction to produce blister copper and converting slag, the converting slag returns to a source and is continuously mixed into copper concentrate to enter the smelting furnace, the blister copper enters a next process anode furnace for refining, the amount of the refined blister copper is 1400 tons every day, a refined anode plate continuously enters an electrolysis process to produce cathode copper, and 1500 tons of anode plates are consumed every day.
And (3) arsenic slag addition test: in 2020, the charging amount of the arsenic slag is gradually increased every month, and the continuous increment is stopped until the negative plate is influenced (the surface of the negative plate is rough, unsmooth and uneven when the arsenic is excessive), and the data are recorded in Table 1.
TABLE 1 arsenic slag addition data
Calculating the removal rate of arsenic element in a smelting section, a blowing section and a refining section in each month in the whole year, wherein the table 2 shows the calculation result of 1 month in 2020, respectively calculating the removal rate of the arsenic element in 12 months in 2020, then calculating the average removal rate of the arsenic element in each section in 12 months (the table 3 shows the removal rate of the arsenic element in the refining section), and testing the saturation concentration of arsenic in the electrolyte of an electrolysis workshop to be 9g/L after the gradual addition reaches the upper limit, so that the maximum addition of arsenic in and out of dry ore (265 t/h) is calculated step by step according to the removal rate of each section (shown in the table 4), the arsenic content of the mixed ore of ingredients is controlled to be 0.3-0.35% averagely, and the addition of 15-20t arsenic filter cake per day of the Odoi furnace is correspondingly calculated.
TABLE 2 calculation of arsenic removal Rate for 1 month smelting and converting process in 2020
TABLE 3 calculation of arsenic removal Rate in refining section
TABLE 4 analysis of arsenic saturation concentration in mixed (dry) ores
According to the technical scheme of the invention, the addition amount of the arsenic filter cake is adjusted in time according to the arsenic content of the mixed ore during each batching, and finally the stable control of the addition amount of arsenic at the source is achieved, so that most of arsenic slag is treated, the quality of a cathode plate is not influenced, most of outsourcing treatment cost of the arsenic slag is saved for enterprises, and the loss of valuable elements is reduced.
Claims (2)
1. A method for treating arsenic slag produced by an Olympic furnace copper smelting process comprises the following steps:
(1) Uniformly mixing the arsenic slag and the raw material copper concentrate of the flash copper smelting process to form mixed ore;
(2) Carrying out smelting operation, blowing operation, refining operation and electrolysis operation on the mixed ore in sequence, and observing the surface condition of the cathode plate;
(3) Gradually increasing the doping proportion of the arsenic slag in the mixed ore, repeating the step (2) until a critical point of a rough phenomenon appears on the surface of the cathode plate in the electrolytic operation process, taking the critical point as an arsenic saturation point of the flash copper smelting process, and calculating the saturation value of the arsenic content in the mixed ore at the moment;
(4) And adding the arsenic slag into the flash copper smelting process according to the amount that the arsenic content in the mixed ore does not exceed the arsenic saturation value for circular treatment.
2. The method for treating arsenic slag produced in the austempered copper smelting process according to claim 1, which comprises the following steps: in the step (3), after the arsenic saturation point of the flash copper smelting process is determined, the arsenic removal rates of the refining stage, the flash converting stage and the flash smelting stage in the flash copper smelting process are reversely deduced according to the saturation point, and the arsenic content in the mixed ore added during flash smelting is controlled not to exceed the saturation value according to the arsenic removal rate of each stage.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211319662.6A CN115652102A (en) | 2022-10-26 | 2022-10-26 | Method for treating arsenic slag produced in copper smelting process of austenite furnace |
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| CN202211319662.6A CN115652102A (en) | 2022-10-26 | 2022-10-26 | Method for treating arsenic slag produced in copper smelting process of austenite furnace |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102618731A (en) * | 2012-03-29 | 2012-08-01 | 金川集团有限公司 | Fire arsenic removal method |
| JP2016222997A (en) * | 2015-06-03 | 2016-12-28 | 住友金属鉱山株式会社 | Method for recovering arsenic |
| CA2974905A1 (en) * | 2016-07-28 | 2018-01-28 | Compania de Minas Buenaventura | Process for extraction of copper from arsenical copper sulfide concentrate |
| US20180119250A1 (en) * | 2016-11-02 | 2018-05-03 | Yanggu Xiangguang Copper CO., Ltd | Method for smelting high-arsenic copper sulfide ore |
| CN113528852A (en) * | 2021-05-28 | 2021-10-22 | 河南豫光金铅股份有限公司 | Production method for dearsenifying and deleading high-arsenic lead copper matte |
| CN114293025A (en) * | 2021-12-30 | 2022-04-08 | 浙江富冶集团有限公司 | Method for controlling arsenic trend of copper pyrometallurgical system |
-
2022
- 2022-10-26 CN CN202211319662.6A patent/CN115652102A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102618731A (en) * | 2012-03-29 | 2012-08-01 | 金川集团有限公司 | Fire arsenic removal method |
| JP2016222997A (en) * | 2015-06-03 | 2016-12-28 | 住友金属鉱山株式会社 | Method for recovering arsenic |
| CA2974905A1 (en) * | 2016-07-28 | 2018-01-28 | Compania de Minas Buenaventura | Process for extraction of copper from arsenical copper sulfide concentrate |
| US20180119250A1 (en) * | 2016-11-02 | 2018-05-03 | Yanggu Xiangguang Copper CO., Ltd | Method for smelting high-arsenic copper sulfide ore |
| CN113528852A (en) * | 2021-05-28 | 2021-10-22 | 河南豫光金铅股份有限公司 | Production method for dearsenifying and deleading high-arsenic lead copper matte |
| CN114293025A (en) * | 2021-12-30 | 2022-04-08 | 浙江富冶集团有限公司 | Method for controlling arsenic trend of copper pyrometallurgical system |
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