CN103182346A - Novel process for improving grade of sulfate cinder iron - Google Patents
Novel process for improving grade of sulfate cinder iron Download PDFInfo
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- CN103182346A CN103182346A CN2011104541120A CN201110454112A CN103182346A CN 103182346 A CN103182346 A CN 103182346A CN 2011104541120 A CN2011104541120 A CN 2011104541120A CN 201110454112 A CN201110454112 A CN 201110454112A CN 103182346 A CN103182346 A CN 103182346A
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Abstract
The invention relates to a novel process for improving the grade of sulfate cinder iron. After a sulfate cinder raw material is simply and crudely ground, a rough concentrate is obtained by using a conventional process, the rough concentrate is subjected to granularity sieving and grading, the selected ore is finely ground and quickly settles to obtain an underflow concentrate. And after the underflow concentrate is combined with the selected ore, the concentrate is obtained finally. The novel process is easy to construct and go into operation. After the process is improved, the ore grinding amount is reduced, the ore grinding time is shortened, and the ore grinding cost is greatly reduced by 50 to 70 percent. Meanwhile, the newly added process and equipment belong to physical separation, so energy consumption is low and pollution is not caused.
Description
Technical field
The present invention relates to utilize pyrite cinder to produce the method for the smart powder of iron, be specifically related to improve the new technology that pyrite cinder is produced the smart powder iron of iron grade.
Background technology
Pyrite cinder is a kind of solid waste that produces with troilite production sulfuric acid.Because iron content is abundant in the burning slag, can produce smart iron powder through sorting process, as iron-smelting raw material.The iron grade is generally 30～50% in the pyrite cinder, and traditional processing method is the iron ore concentrate that obtains iron grade＞60% through step enrichment iron such as ore grinding, magnetic separation, gravity treatments.But it is that-200 orders are (0.074mm) more than 80% that this method needs raw ore is finely ground to fineness, have even needs arrive-200 orders 95%, cause the rate of recovery of iron not high, only be 50～70%, can reach 80% extremely individually, part of sulfuric acid burns the influence that slag is subjected to character own, and iron ore concentrate iron grade only can reach 50～55%, further improve the iron grade rate of recovery will be declined to a great extent, can't obtain considerable economic.For the method that improves the rate of recovery is directly to produce smart iron powder, this method has been introduced hydrometallurgy process such as soda acid leaching, makes flow process complicated, produces unmanageable waste liquid simultaneously, contaminated environment at present.Therefore, be necessary to propose a kind ofly on the traditional handicraft basis, to be improved, under the rate of recovery descends little prerequisite, improve iron ore concentrate iron grade, make it to reach the new technology of qualified iron ore concentrate standard.
Summary of the invention
The new technology that the purpose of this invention is to provide a kind of quick raising pyrite cinder iron grade, the iron grade changes and is reduced to the characteristics that similar sine curve distributes by grade (coarse fraction and fine fraction grade are low in the most of pyrite cinder concentrate of this technology utilization, intermediate fraction is of high grade), emphasis is handled the coarse fraction part.It is simple to have flow process, construction easily, and the characteristics that are easy to go into operation are applicable to the ancillary method as old process, improve pyrite cinder iron grade.
For reaching the purpose of foregoing invention, the present invention by the following technical solutions:
A kind of new technology that improves pyrite cinder iron grade, it comprises following operation:
Operation 4, with the analysis result of operation 3, with guarantee sieve down iron grade＞60% in ore deposit be that the screen cloth that criterion is chosen suitable fineness sieves rough concentrate, obtain sieving the ore deposit and sieve under the ore deposit;
The new technology of aforesaid raising pyrite cinder iron grade, wherein, the screen cloth in the operation 3 is preferably the screen cloth that the aperture is respectively 0.15mm, 0.18mm and 0.25mm.
The new technology of aforesaid raising pyrite cinder iron grade, wherein, the time of staying of operation 6 rapid subsidence steps is 10～30min.
The new technology of aforesaid raising pyrite cinder iron grade, wherein iron grade＞30% (weight ratio) in this pyrite cinder; Fineness is+0.15mm70%.
Advantage of the present invention is: new technology forms for improving on the traditional handicraft basis, and construction easily is easy to go into operation.Shorten ore grinding amount and ore grinding time after the process modification, significantly reduced ore grinding cost 50～70%.After adopting new technology of the present invention, reach identical iron grade, its rate of recovery can improve 5～7 percentage points.Simultaneously, newly-increased Processes and apparatus belongs to physical separation, and energy consumption is low, and is pollution-free.
Description of drawings
Fig. 1 is process chart of the present invention.
The specific embodiment
Technology of the present invention is burnt the characteristics of slag raw material iron grade according to present part of sulfuric acid, when finding that through sieve analysis traditional table concentration sorts pyrite cinder, the iron grade changes and to reduce to present the variation tendency that increases gradually by grade (the coarse fraction grade is low in its concentrate, middle fine fraction is of high grade), screening result shows simultaneously: emphasis is handled the coarse fraction part of 0.15～0.25mm, can improve pyrite cinder concentrate iron grade.
Further specify the present invention below in conjunction with instantiation.
Raw material is the pyrite cinder that the acid plant, Guangxi produces.This raw material ferrous grade is about 44% ,+0.15mm granularity about 80%.Adopt table concentration, mog be-during 0.074mm 90%, the iron grade is 61%, the rate of recovery is 51%.After adopting new technology of the present invention, the iron grade is 61% o'clock, and the rate of recovery can reach 58%, improves 7 percentage points than the traditional handicraft rate of recovery.
Adopt technological process as shown in Figure 1, concrete operations are as follows:
(1) raw material enters grinding system, the fineness of material is reached-0.074mm 60%, and iron is tentatively dissociated;
(2) obtain rough concentrate and mine tailing through table concentration;
(3) with 0.15mm, 0.18mm, 0.25mm screen cloth rough concentrate sampling 1000g is carried out sizing respectively, analyze the iron grade distribution situation that obtains each grade, the result is as shown in table 1.
Table 1 rough concentrate screening result
As shown in Table 1 ,-0.15mm part iron grade reaches 61.51%, and occupation rate is 49.82%; + 0.15mm part iron grade 53～56% needs to continue to handle.
(4) adopting sieve diameter is that the high frequency shale shaker of 0.15mm carries out classification to above-mentioned rough concentrate, obtains sieving the ore deposit and sieve descends the ore deposit;
(5) ore deposit enters the secondary grinding system on the sieve, is finely ground to-0.074mm 85%, makes the abundant monomer dissociation of iron;
(6) ore deposit is through the concentrator rapid subsidence on the sieve after the fine grinding, and the time of staying keeps 25min, obtains underflow concentrate and overflow mine tailing; Overflow mine tailing and the merging of operation 2 gained mine tailings are pumped to tailing dam after treatment; Underflow concentrate and operation 4 gained sieve obtain the final concentrate product after the ore deposit merges down, and the iron grade is 61%, and the rate of recovery is 58%.
The pyrite cinder of acid plant, Hebei, its raw material ferrous grade is about 38% ,+0.15mm granularity about 70%.Adopt table concentration, mog be-during 0.074mm 85%, the iron grade is 60%, the rate of recovery only is 37%.After adopting new technology of the present invention, the iron grade is 60% o'clock, and the rate of recovery reaches 43%, improves 6 percentage points than the traditional handicraft rate of recovery.
Adopt technological process as shown in Figure 1, concrete operations are as follows:
(1) raw material enters grinding system, the fineness of material is reached-0.074mm 50%, and iron is tentatively dissociated;
(2) obtain rough concentrate and mine tailing through table concentration;
(3) with 0.15mm, 0.18mm, 0.25mm screen cloth rough concentrate sampling 1000g is carried out sizing respectively, analyze the iron grade distribution situation that obtains each grade, the result is as shown in table 2.
Table 2 rough concentrate screening result
As shown in Table 2 ,-0.15mm part iron grade is 60.20%, and occupation rate is 32.81%; + 0.15mm part iron grade 43～57% needs to continue to handle.
(4) adopting sieve diameter is that the high frequency shale shaker of 0.15mm carries out classification to above-mentioned rough concentrate, obtains sieving the ore deposit and sieve descends the ore deposit;
(5) ore deposit enters the secondary grinding system on the sieve, is finely ground to-0.074mm 90%, makes the abundant monomer dissociation of iron;
(6) ore deposit is through the concentrator rapid subsidence on the sieve after the fine grinding, and the time of staying keeps 20min, obtains underflow concentrate and overflow mine tailing; Overflow mine tailing and the merging of operation 2 gained mine tailings are pumped to tailing dam after treatment; Underflow concentrate and operation 4 gained sieve obtain the final concentrate product after the ore deposit merges down, and the iron grade is 60%, and the rate of recovery is 43%.
Claims (4)
1. a new technology that improves pyrite cinder iron grade is characterized in that, it comprises following operation:
Operation 1 is carried out ore grinding with pyrite cinder and is handled, and mog is-0.074mm 50～70%;
Operation 2, the material behind the ore grinding are to obtain rough concentrate and mine tailing through table concentration under 10～20% the condition at feed ore concentration;
Operation 3 to above-mentioned rough concentrate sampling, adopts at least three screen clothes of aperture between 0.15-0.25mm to carry out sieve analysis, obtains the iron grade distribution situation of each several part;
Operation 4, with the analysis result of operation 3, with guarantee sieve down iron grade＞60% in ore deposit be that the screen cloth that criterion is chosen corresponding fineness sieves rough concentrate, obtain sieving the ore deposit and sieve under the ore deposit;
Operation 5, the further fine grinding in ore deposit on the sieve that operation 4 is obtained, mog maintenance-0.074mm＞80%;
Operation 6, the material after the fine grinding adopt dense precipitation apparatus to carry out rapid subsidence, regulate the sedimentation time, guarantee that underflow iron grade is greater than 60%; The ore deposit merging is concentrate under the sieve of underflow and operation 4, and overflow and operation 2 mine tailings are merged into mine tailing, deliver to tailing dam after the processing.
2. the new technology of raising pyrite cinder iron grade according to claim 1 is characterized in that, screen cloth is the screen cloth that the aperture is respectively 0.15mm, 0.18mm and 0.25mm described in the described operation 3.
3. the new technology of raising pyrite cinder iron grade according to claim 1 is characterized in that, the time of staying of rapid subsidence step is 10～30min in the described operation 6.
4. according to the new technology of each described raising pyrite cinder iron grade among the claim 1-3, it is characterized in that iron grade＞30% (weight ratio) in the described pyrite cinder; Fineness is+0.15mm＞70%.
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| CN2011104541120A CN103182346A (en) | 2011-12-30 | 2011-12-30 | Novel process for improving grade of sulfate cinder iron |
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| CN2011104541120A CN103182346A (en) | 2011-12-30 | 2011-12-30 | Novel process for improving grade of sulfate cinder iron |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106733140A (en) * | 2015-11-23 | 2017-05-31 | 湖南衡阳新澧化工有限公司 | A kind of method that utilization waste residue produces ferriferous oxide |
| CN111270069A (en) * | 2019-09-19 | 2020-06-12 | 廊坊市中铁物探勘察有限公司 | Molybdenum concentrate production process |
| CN112090577A (en) * | 2020-09-09 | 2020-12-18 | 中钢集团马鞍山矿山研究总院股份有限公司 | Heavy-floating combined beneficiation method for iron-rich and high-sulfur sulfuric acid slag |
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| CN1948521A (en) * | 2006-08-23 | 2007-04-18 | 青海西部矿业科技有限公司 | Technology of recovering iron resource from pyrite sintering slag |
| CN101787439A (en) * | 2010-03-02 | 2010-07-28 | 邓彤 | Method for recovering valuable metals from metallurgical waste |
| US20100314242A1 (en) * | 2009-04-02 | 2010-12-16 | Atomic Energy Council-Institute Of Nuclear Energy Research | Method for Recovering Gold, Silver, Copper and Iron from Plasma-Caused Slag Containing Valuable Metals |
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Patent Citations (3)
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| CN1948521A (en) * | 2006-08-23 | 2007-04-18 | 青海西部矿业科技有限公司 | Technology of recovering iron resource from pyrite sintering slag |
| US20100314242A1 (en) * | 2009-04-02 | 2010-12-16 | Atomic Energy Council-Institute Of Nuclear Energy Research | Method for Recovering Gold, Silver, Copper and Iron from Plasma-Caused Slag Containing Valuable Metals |
| CN101787439A (en) * | 2010-03-02 | 2010-07-28 | 邓彤 | Method for recovering valuable metals from metallurgical waste |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106733140A (en) * | 2015-11-23 | 2017-05-31 | 湖南衡阳新澧化工有限公司 | A kind of method that utilization waste residue produces ferriferous oxide |
| CN111270069A (en) * | 2019-09-19 | 2020-06-12 | 廊坊市中铁物探勘察有限公司 | Molybdenum concentrate production process |
| CN112090577A (en) * | 2020-09-09 | 2020-12-18 | 中钢集团马鞍山矿山研究总院股份有限公司 | Heavy-floating combined beneficiation method for iron-rich and high-sulfur sulfuric acid slag |
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Application publication date: 20130703 |