CN103725878A - Method for comprehensively utilizing residual tailings after extracting precious metals from acid pickling sludge - Google Patents
Method for comprehensively utilizing residual tailings after extracting precious metals from acid pickling sludge Download PDFInfo
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- CN103725878A CN103725878A CN201410011545.2A CN201410011545A CN103725878A CN 103725878 A CN103725878 A CN 103725878A CN 201410011545 A CN201410011545 A CN 201410011545A CN 103725878 A CN103725878 A CN 103725878A
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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
Abstract
The invention particularly relates to a method for comprehensively utilizing residual tailings after extracting precious metals from acid pickling sludge. The method is suitable for processing the residual tailings after recycling the precious metals from the acid pickling sludge through an acid leaching method. The method disclosed by the invention has the advantages that the residual tailings after extracting the precious metals from the acid pickling sludge can be comprehensively recycled to be prepared into powdered iron, rock wool products and sulfuric acid, so that the economic value is effectively realized; the method is simple in operation process, popular in raw material, low in production cost and remarkable in economic effect; the residual tailings are effectively and comprehensively utilized by means of the method disclosed by the invention, so that the discharge of the tailings is reduced, the land is saved and the environment is effectively protected.
Description
Technical field
The present invention is specifically related to a kind of pickling mud that fully utilizes and extracts the method that precious metal remains tailings afterwards, is applicable to process pickling mud and reclaims precious metal remaining tailings afterwards by acid leaching process.
Background technology
China Shi Yige stainless steel big producing country, annual production is greater than 2,000 ten thousand tons, all will produce a large amount of stainless steel products every year, and what in the course of processing, be accompanied by is the generation of a large amount of pickling mud.For example, Anhua city, Taizhou, Jiangsu pickling sludge yield in 2012 has been broken through 800,000 tons, in pickling mud, contain a large amount of heavy metals and harmful element, main processing mode output landfill, great majority are deposited in refuse landfill, and this mode is cured the symptoms, not the disease, and not only take a large amount of soils, and serious environment pollution, bring very large harm to the mankind's living environment.
Country had proposed new requirement for the processing of pickling mud gradually in the last few years, numerous colleges and universities and enterprise have developed the method for precious metal in multiple recovered acid contaminate mud simultaneously, in the method for recycling at precious metal, there is again dividing of pyrometallurgical smelting and hydrometallurgy, the pyrometallurgical smelting rate of recovery is higher, but due to bottleneck constraints such as its energy consumption and environmental pollutions, this method is controlled, though and hydrometallurgy has the advantage that its energy consumption is lower, the tailings after this method is processed belongs to dangerous solid waste.At present effectively terms of settlement is that tailings is used for to brickmaking or cement processed, by vitrifying or lattice distortion method, make heavy metal stabilization, but in developed area, especially population collection city, as Shanghai City, brick field and cement mill have not allowed to exist, and this makes how effectively to utilize pickling mud extraction precious metal to remain tailings afterwards becomes a difficult problem.
Summary of the invention
The invention provides a kind of pickling mud that fully utilizes and extract the method that precious metal remains tailings afterwards, be applicable to process pickling mud and reclaim precious metal remaining tailings afterwards by acid leaching process.The present invention can extract precious metal residue tailings afterwards by comprehensive reutilization pickling mud, has been prepared into iron fine powder, asbestos product and sulfuric acid, has effectively realized economic worth; Operating process of the present invention is simple, raw material universal, and production cost is lower, obvious economic; The present invention has effectively fully utilized residue tailings, has reduced the discharge of tailings, has saved soil, has effectively protected environment.
Technical solution of the present invention is as follows:
Fully utilize pickling mud and extract the method that precious metal remains tailings afterwards, the steps include:
(1) fragmentation: pour tailings in crusher fragmentation, be crushed to 10 orders and following;
(2) batching, pressure ball and dry: the tailings after fragmentation and coal dust are prepared burden, and even in stirrer for mixing, then use ball press pressure ball, then it is dry at the temperature of 150 ℃ to put into dryer, obtain tailings pelletizing, pelletizing is of a size of 20-30mm;
(3) roasting: tailings pelletizing is put into revolution roasting in kilns, obtain SO after roasting
2flue dust gas and slag;
(4) sulfuric acid processed: by the SO producing in roasting process
2flue dust gas adopt propylhomoserin method absorb-purify-after transforming, make sulfuric acid;
(5) grinding and magnetic separation: by the slag producing in roasting process grinding in ball mill, after grinding to 80 order is following, by magnetic separator, carry out magnetic separation, separation obtains remaining tailings and iron fine powder;
(6) high melt: will remain after tailings and coke mixing, and add in cupola furnace from furnace roof, and pass to combustion air in stove, the high temperature being produced by coke burning is melt into rock wool melt by residue tailings simultaneously;
(7) centrifugal fibroblast: utilize the acceleration step by step of the Centrifugal rolling of roll-type fiberizer, by the rock wool melt flowing out, under the effect of centrifugal force, get rid of into rock wool fibers by stream thigh in whizzer from cupola furnace;
(8) high-temperature shaping: rock wool fibers is placed in the cotton collecting chamber of the cotton equipment of collection, there is movable conveying mesh bag in the bottom system of cotton collecting chamber, carry the below of mesh bag to be provided with wind chamber, in rock wool fibers, spray with vaporific cakingagent, the negative pressure that relies on wind chamber to form is adsorbed on guipure surface by rock wool fibers, forms rock wool raw material.
Further design of the present invention is: in step (1), tailings composition is: Si 10-20%, Fe 8-20%, Ca 0-6%, Al 0-7%, Mg 0-8%, S 4-12 %, Ni 0-1 %, H
2o 0-15 %.
In step (2), the mass ratio of tailings and carbon dust batching is 4-5:1.
In step (3), the temperature of roasting is 800 ℃-900 ℃, and roasting time is 60-90min.
In step (5), magnetic separation condition is that magneticstrength is 160kA/m.
In step (6), remaining tailings and coke proportioning are weight ratio 1:0.15, and combustion air is that freezing air or temperature are the hot blast of 450-550 ℃, and rock wool melt temperature is 1250～1420 ℃.
In step (7), roll-type fiberizer has 3-4 Centrifugal rolling, and each roller rotating speed raises step by step, by the rock wool melt flowing out from cupola furnace, in whizzer, under the effect of centrifugal force, by stream strand, gets rid of into rock wool fibers, and the centrifugal rotational speed of whizzer is 3000r/min.
In step (8), cakingagent is modified phenolic resins, and the applying glue nozzle that sprays into cakingagent is 8-12.
beneficial effect of the present invention:
1. the present invention can extract precious metal residue tailings afterwards by comprehensive reutilization pickling mud, has been prepared into iron fine powder, asbestos product and sulfuric acid, has effectively realized economic worth;
2. operating process of the present invention is simple, and raw material is universal, and production cost is lower, obvious economic;
3. the present invention has effectively fully utilized residue tailings, has reduced the discharge of tailings, has saved soil, has effectively protected environment.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
embodiment mono-:
The present invention fully utilizes pickling mud and extracts the method that precious metal remains tailings afterwards, the steps include:
(1) fragmentation: pour tailings in crusher fragmentation, be crushed to 8 orders; Tailings composition is: Si 16.3%, and Fe 15.1%, and Ca 3.0%, and Al 4.7%, and Mg 4.8%, and S 5.8%, and Ni 0.72%, H
2o 2.3%;
(2) batching, pressure ball and dry: the tailings after fragmentation and carbon dust are prepared burden, and even in large-scale stirrer for mixing, then use ball press pressure ball, then it is dry at the temperature of 150 ℃ to put into dryer, obtain tailings pelletizing, pelletizing is of a size of 20-30mm; The mass ratio of tailings and carbon dust batching is 4:1;
(3) roasting: tailings pelletizing is put into revolution roasting in kilns, obtain SO after roasting
2flue dust gas and slag; The temperature of roasting is 800 ℃, and roasting time is 60min; After roasting completes, in the situation that not opening rotary kiln lid door, at rotary kiln wall, utilize cooling by water outward, do like this and can shorten flow process, cooling material, is beneficial to operation grinding and magnetic separation below; The object of roasting is the Fe of weak magnetic
2o
3be reduced into ferromagnetic Fe
3o
4, make the iron in mineral carry out enriching and recovering by magnetic separation process;
(4) sulfuric acid processed: by the SO producing in roasting process
2flue dust gas adopt propylhomoserin method absorb-purify-after transforming, make sulfuric acid;
(5) grinding and magnetic separation: by the slag producing in roasting process grinding in ball mill, after grinding to 60 order, by magnetic separator, carry out magnetic separation, separation obtains remaining tailings and iron fine powder; Magnetic separation condition is that magneticstrength is 160kA/m, and after magnetic separation, iron ore concentrate productive rate reaches 80.1%, and the rate of recovery of iron can reach 88.7%;
(6) high melt: will remain after tailings and coke mixing, and add in cupola furnace from furnace roof, and pass to combustion air in stove, melting forms rock wool melt under the high temperature of 1250 ℃ simultaneously; Remaining tailings and coke proportioning are weight ratio 1:0.15, and combustion air is freezing air;
(7) centrifugal fibroblast: utilize the acceleration step by step of the Centrifugal rolling of roll-type fiberizer, by the rock wool melt flowing out, under the effect of centrifugal force, get rid of into rock wool fibers by stream thigh in whizzer from cupola furnace; The centrifugal rotational speed of whizzer is 3000r/min; Roll-type fiberizer has 3 Centrifugal rollings, and each roller rotating speed raises step by step;
(8) high-temperature shaping: rock wool fibers is placed in the cotton collecting chamber of the cotton equipment of collection, there is movable conveying mesh bag in the bottom system of cotton collecting chamber, carry the below of mesh bag to be provided with wind chamber, in rock wool fibers, spray with vaporific cakingagent, the negative pressure that relies on wind chamber to form is adsorbed on guipure surface by rock wool fibers, form rock wool raw material, cakingagent is modified phenolic resins, and the applying glue nozzle that sprays into cakingagent is 8.
embodiment bis-:
The present invention fully utilizes pickling mud and extracts the method that precious metal remains tailings afterwards, the steps include:
(1) fragmentation: pour tailings in crusher fragmentation, be crushed to 9 orders; Tailings composition is: Si 14.3%, and Fe 8.7%, Ca4.7%, and Al 5.6%, and Mg 7.1%, and S 4.7%, and Ni 0.64%, H
2o 2.7%;
(2) batching, pressure ball and dry: the tailings after fragmentation and carbon dust are prepared burden, and even in large-scale stirrer for mixing, then use ball press pressure ball, then it is dry at the temperature of 150 ℃ to put into dryer, obtain tailings pelletizing, pelletizing is of a size of 20-30mm; The mass ratio of tailings and carbon dust batching is 4.5:1;
(3) roasting: tailings pelletizing is put into revolution roasting in kilns, obtain SO after roasting
2flue dust gas and slag; The temperature of roasting is 850 ℃, and roasting time is 75min.After roasting completes, in the situation that not opening rotary kiln lid door, at rotary kiln wall, utilize cooling by water outward, do like this and can shorten flow process, cooling material, is beneficial to operation grinding and magnetic separation below; The object of roasting is the Fe of weak magnetic
2o
3be reduced into ferromagnetic Fe
3o
4, make the iron in mineral carry out enriching and recovering by magnetic separation process;
(4) sulfuric acid processed: by the SO producing in roasting process
2flue dust gas adopt propylhomoserin method absorb-purify-after transforming, make sulfuric acid;
(5) grinding and magnetic separation: by the slag producing in roasting process grinding in ball mill, after grinding to 70 order, by magnetic separator, carry out magnetic separation, separation obtains remaining tailings and iron fine powder; Magnetic separation condition is that magneticstrength is 160kA/m, and after magnetic separation, iron ore concentrate productive rate reaches 81.7%, and the rate of recovery of iron can reach 90.2%;
(6) high melt: will remain after tailings and coke mixing, and add in cupola furnace from furnace roof, and pass to combustion air in stove, melting forms rock wool melt under the high temperature of 1300 ℃ simultaneously; Remaining tailings and coke proportioning are weight ratio 1:0.15, and combustion air is that temperature is the hot blast of 500 ℃;
(7) centrifugal fibroblast: utilize the acceleration step by step of the Centrifugal rolling of roll-type fiberizer, by the rock wool melt flowing out, under the effect of centrifugal force, get rid of into rock wool fibers by stream thigh in whizzer from cupola furnace; The centrifugal rotational speed of whizzer is 3000r/min; Roll-type fiberizer has 4 Centrifugal rollings, and each roller rotating speed raises step by step;
(8) high-temperature shaping: rock wool fibers is placed in the cotton collecting chamber of the cotton equipment of collection, there is movable conveying mesh bag in the bottom system of cotton collecting chamber, carry the below of mesh bag to be provided with wind chamber, in rock wool fibers, spray with vaporific cakingagent, the negative pressure that relies on wind chamber to form is adsorbed on guipure surface by rock wool fibers, form rock wool raw material, cakingagent is modified phenolic resins, and the applying glue nozzle that sprays into cakingagent is 10.
embodiment tri-:
The present invention fully utilizes pickling mud and extracts the method that precious metal remains tailings afterwards, the steps include:
(1) fragmentation: pour tailings in jaw crusher fragmentation, be crushed to 10 orders; Tailings composition is: Si 15.6%, and Fe 8.3%, Ca5.2%, and Al 6.1%, and Mg 4.3%, and S 4.2%, and Ni 0.74%, H
2o 2.0%;
(2) batching, pressure ball and dry: the tailings after fragmentation and carbon dust are prepared burden, and even in large-scale stirrer for mixing, then use ball press pressure ball, then it is dry at the temperature of 150 ℃ to put into dryer, obtain tailings pelletizing, pelletizing is of a size of 20-30mm; The mass ratio of tailings and carbon dust batching is 5:1;
(3) roasting: tailings pelletizing is put into revolution roasting in kilns, obtain SO after roasting
2flue dust gas and slag; The temperature of roasting is 900 ℃, and roasting time is 90min; After roasting completes, in the situation that not opening rotary kiln lid door, at rotary kiln wall, utilize cooling by water outward, do like this and can shorten flow process, cooling material, is beneficial to operation grinding and magnetic separation below; The object of roasting is the Fe of weak magnetic
2o
3be reduced into ferromagnetic Fe
3o
4, make the iron in mineral carry out enriching and recovering by magnetic separation process;
(4) sulfuric acid processed: by the SO producing in roasting process
2flue dust gas adopt propylhomoserin method absorb-purify-after transforming, make sulfuric acid;
(5) grinding and magnetic separation: by the slag producing in roasting process grinding in ball mill, after grinding to 75 order, by magnetic separator, carry out magnetic separation, separation obtains remaining tailings and iron fine powder; Magnetic separation condition is that magneticstrength is 160kA/m, and after magnetic separation, iron ore concentrate productive rate reaches 83.2%, and the rate of recovery of iron can reach 91.1%;
(6) high melt: will remain after tailings and coke mixing, and add in cupola furnace from furnace roof, and pass to combustion air in stove, melting forms rock wool melt under the high temperature of 1400 ℃ simultaneously; Remaining tailings and coke proportioning are weight ratio 1:0.15, and combustion air is that temperature is the hot blast of 550 ℃;
(7) centrifugal fibroblast: utilize the acceleration step by step of the Centrifugal rolling of roll-type fiberizer, by the rock wool melt flowing out, under the effect of centrifugal force, get rid of into rock wool fibers by stream thigh in whizzer from cupola furnace; The centrifugal rotational speed of whizzer is 3000r/min; Roll-type fiberizer has 4 Centrifugal rollings, and each roller rotating speed raises step by step;
(8) high-temperature shaping: rock wool fibers is placed in the cotton collecting chamber of the cotton equipment of collection, there is movable conveying mesh bag in the bottom system of cotton collecting chamber, carry the below of mesh bag to be provided with wind chamber, in rock wool fibers, spray with vaporific cakingagent, the negative pressure that relies on wind chamber to form is adsorbed on guipure surface by rock wool fibers, form rock wool raw material, cakingagent is modified phenolic resins, and the applying glue nozzle that sprays into cakingagent is 12.
Claims (8)
1. fully utilize pickling mud and extract the method that precious metal remains tailings afterwards, the steps include:
(1) fragmentation: pour tailings in crusher fragmentation, be crushed to 10 orders and following;
(2) batching, pressure ball and dry: the tailings after fragmentation and coal dust are prepared burden, and even in stirrer for mixing, then use ball press pressure ball, then it is dry at the temperature of 150 ℃ to put into dryer, obtains tailings pelletizing, pelletizing is of a size of 20-30mm;
(3) roasting: tailings pelletizing is put into revolution roasting in kilns, obtain SO after roasting
2flue dust gas and slag;
(4) sulfuric acid processed: by the SO producing in roasting process
2flue dust gas adopt propylhomoserin method absorb-purify-after transforming, make sulfuric acid;
(5) grinding and magnetic separation: by the slag producing in roasting process grinding in ball mill, after grinding to 80 order is following, by magnetic separator, carry out magnetic separation, separation obtains remaining tailings and iron fine powder;
(6) high melt: will remain after tailings and coke mixing, and add in cupola furnace from furnace roof, and pass to combustion air in stove, the high temperature being produced by coke burning is melt into rock wool melt by residue tailings simultaneously;
(7) centrifugal fibroblast: utilize the acceleration step by step of the Centrifugal rolling of roll-type fiberizer, by the rock wool melt flowing out, under the effect of centrifugal force, get rid of into rock wool fibers by stream thigh in whizzer from cupola furnace;
(8) high-temperature shaping: rock wool fibers is placed in the cotton collecting chamber of the cotton equipment of collection, there is movable conveying mesh bag in the bottom system of cotton collecting chamber, carry the below of mesh bag to be provided with wind chamber, in rock wool fibers, spray with vaporific cakingagent, the negative pressure that relies on wind chamber to form is adsorbed on guipure surface by rock wool fibers, forms rock wool raw material.
2. comprehensive utilization pickling mud according to claim 1 extracts the method that noble metal remains tailings afterwards, it is characterized in that: in described step (1), tailings composition is: Si 10-20%, Fe 8-20%, Ca 0-6%, Al 0-7%, Mg 0-8%, S 4-12 %, Ni 0-1 %, H
2o 0-15 %.
3. comprehensive utilization pickling mud according to claim 1 and 2 extracts the method that noble metal remains tailings afterwards, it is characterized in that: in step (2), the mass ratio of tailings and carbon dust batching is 4-5:1.
4. comprehensive utilization pickling mud according to claim 1 and 2 extracts the method that noble metal remains tailings afterwards, it is characterized in that: in step (3), the temperature of roasting is 800 ℃-900 ℃, and roasting time is 60-90min.
5. comprehensive utilization pickling mud according to claim 1 and 2 extracts the method that noble metal remains tailings afterwards, it is characterized in that: in step (5), magnetic separation condition is that magneticstrength is 160kA/m.
6. comprehensive utilization pickling mud according to claim 1 and 2 extracts the method that noble metal remains tailings afterwards, it is characterized in that: in step (6), remaining tailings and coke proportioning are weight ratio 1:0.15, combustion air is that freezing air or temperature are the hot blast of 450-550 ℃, and rock wool melt temperature is 1250～1420 ℃.
7. comprehensive utilization pickling mud according to claim 1 and 2 extracts the method that noble metal remains tailings afterwards, it is characterized in that: in step (7), roll-type fiberizer has 3-4 Centrifugal rolling, each roller rotating speed raises step by step, by the rock wool melt flowing out from cupola furnace, in whizzer under the effect of centrifugal force, by stream strand, get rid of into rock wool fibers, the centrifugal rotational speed of whizzer is 3000r/min.
8. comprehensive utilization pickling mud according to claim 1 extracts the method that noble metal remains tailings afterwards, it is characterized in that: in step (8), cakingagent is modified phenolic resins.
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|---|---|---|---|
| CN201410011545.2A CN103725878A (en) | 2014-01-10 | 2014-01-10 | Method for comprehensively utilizing residual tailings after extracting precious metals from acid pickling sludge |
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Cited By (3)
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|---|---|---|---|---|
| CN104131166A (en) * | 2014-07-08 | 2014-11-05 | 泰州明锋资源再生科技有限公司 | Pollution-free treatment and recycling method of sludge generated during stainless steel acid washing process |
| CN104711428A (en) * | 2015-02-12 | 2015-06-17 | 江苏恒嘉再生资源有限公司 | Method for preparing and recovering noble metal in pickling sludge |
| CN114163130A (en) * | 2021-12-31 | 2022-03-11 | 江苏开放大学（江苏城市职业学院） | Method for refining microcrystalline glass from stainless steel sludge |
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| CN104131166A (en) * | 2014-07-08 | 2014-11-05 | 泰州明锋资源再生科技有限公司 | Pollution-free treatment and recycling method of sludge generated during stainless steel acid washing process |
| CN104711428A (en) * | 2015-02-12 | 2015-06-17 | 江苏恒嘉再生资源有限公司 | Method for preparing and recovering noble metal in pickling sludge |
| CN104711428B (en) * | 2015-02-12 | 2017-05-03 | 江苏恒嘉再生资源有限公司 | Method for preparing and recovering metal in pickling sludge |
| CN114163130A (en) * | 2021-12-31 | 2022-03-11 | 江苏开放大学（江苏城市职业学院） | Method for refining microcrystalline glass from stainless steel sludge |
| CN114163130B (en) * | 2021-12-31 | 2022-09-30 | 江苏开放大学（江苏城市职业学院） | Method for refining microcrystalline glass from stainless steel sludge |
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Application publication date: 20140416 |