CN1709589A - Wind force sorting method for classifying refined sulfur sand - Google Patents
Wind force sorting method for classifying refined sulfur sand Download PDFInfo
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- CN1709589A CN1709589A CN 200510021322 CN200510021322A CN1709589A CN 1709589 A CN1709589 A CN 1709589A CN 200510021322 CN200510021322 CN 200510021322 CN 200510021322 A CN200510021322 A CN 200510021322A CN 1709589 A CN1709589 A CN 1709589A
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Abstract
This present invention relates to a method of hierarchical-winnowing sulfur extract sand. The method comprises the steps: (1) break up the raw material into grit whose most granularity is less than 50mm by a gnathic crusher. (2) break up the grit into medium sand whose most granularity is less than 20mm by a mallet crusher. (3) break up the medium sand into fine sand whose most granularity is less than 8mm by a double-roller crusher. (4) send the fine sand to vibrant griddle and the fine sand can go into the winnower through sieve pore. There are finished product store, semi finished product store and impurity product store arranged in turn below the wind path between the wind-in and wind-out ora. The winnower is connected to exhaust fan.
Description
Technical field:
The present invention is relevant with the pulverizing and the size sorting of ore.
Background technology:
Sulfuric acid is consumption maximum in the chemical engineering industry, and purposes is the important foundation raw material the most widely, and sulfuric acid is used to produce chemical fertilizer in agricultural, sulfuric acid is used for the production plurality of inorganic salt in chemical engineering industry, inorganic acid, organic acid, chemical fibre, plastics, medicine, dyestuff also is a national defence, the energy, the important source material of material subject and space subject.Pyrite concentrate is a primary raw material of producing sulfuric acid.
Producing the existing situation of pyrite concentrate technology at present is that primary troilite is entered jaw crusher, enters hammer mill again, and fine ore sand enters jig washer after crushed, utilizes water to carry out the wet dressing of jigging washing.
Because great efforts are pulverized in second-time breakage, make that the ore in sand form particle size differences is big, in the jigging machine washing, the impurity sinking speed that the little sulphur coarse sand of granularity and granularity are big is identical, cause the big impurity of little pyrite concentrate of granularity and granularity to be difficult for choosing branch and discarded simultaneously, make the rate of recovery of sulphur low, it is not high to cause the wasting of resources or pyrite concentrate grade to carry.
Main is the wet production pyrite concentrate, and a large amount of water are discharged into solution cavity towards waste residue, and the river has seriously polluted life industrial water, and solution cavity is filled and led up (influencing massif), and the riverbed is by the serious consequence of bed hedgehopping; The pyrite concentrate of wet production contains a large amount of water, and in transit to means of transport, road all has certain corrosion.
In sum, the subject matter of existing production technology existence is:
1, the rate of recovery is low, and it is not high to cause the wasting of resources or pyrite concentrate grade to carry;
2, very important water pollutes and environmental pollution.
Summary of the invention:
The purpose of this invention is to provide a kind of saving resource, free from environmental pollution, production cost is low, selected pyrite concentrate rate of recovery height, the classification wind selection method of pyrite concentrate of high grade.
The present invention is achieved in that
The classification wind selection method of the utility model pyrite concentrate, its step is as follows:
1) primary troilite is broken into the coarse sand of the granularity of most of particle less than 50mm with jaw crusher,
2) coarse sand is broken into the medium sand of the granularity of most of particle less than 20mm with hammer mill,
3) medium sand is ground into the fine sand of the granularity of most of particle less than 8mm with double-roll crusher,
4) fine sand is delivered to vibratory sieve, enter the air inlet end of air classifier through the fine sand in sieve plate hole, air classifier has the pyrite concentrate finished bin, and semi-finished product storehouse, impurity storehouse are arranged in order below the air channel between air inlet and air outlet, and air classifier is connected with the windlass main.
Vibratory sieve 11 has two groups of sieve plates, first group of sieve plate divides sieve plate 25 and sieve plate 26 by Φ 2mm, 27,28,29,30 form, divide and connect elevator hopper outlet 31 on the sieve plate 25, under hopper 32 is arranged, second group of sieve plate is by sieve plate 33,34,35,36,37 form, sieve plate 33 is by accepting the material of hopper 32 less than the slide sandpipe 38 of Φ 2mm, sieve plate 26,27,28,29,30,33,34,35,36, respectively there is for 37 times an air classifier to be connected with the windlass main, the windlass main is connected with air exhauster 22, control valve 21 is arranged, control valve is also arranged on each air classifier and windlass main's the tube connector, and the windlass main is connected with deduster 20.
The pyrite concentrate of air classifier finished bin is used to produce sulfuric acid, and the ore in sand form in semi-finished product storehouse is sent into the double-roll crusher fragmentation again or sent into the air classifier sorting, and the waste residue in impurity storehouse is discharged.
Double-roll crusher 5 is connected with material hole 7 by pipeline, and pipeline is connected with deduster 20 by exhausting pipeline 8.
By a large amount of evidences, the sieve plate in different apertures below the 8mm is arranged by the thickness order, obtain respective level granularity ore in sand form respectively, have one group of air classifier at each vibratory sieve, through test, same rank ore in sand form particle size differences is littler, the selection by winnowing effect better, the pyrite concentrate grade is higher.When between the 0.1-8mm granularity, when adopting 7 different apertures sieve plates, can obtain the ore in sand form granularity of 8 grades, can reach 30% through the pyrite concentrate grade of selection by winnowing.When between 0.1-8mm, adopting 45 different apertures sieve plates, can obtain the ore in sand form granularity of 46 grades, can reach 50% through selection by winnowing pyrite concentrate grade, illustrating herewith that aperture difference heals more can improve the pyrite concentrate grade for a short time.Wet method selects the sulphur concentrate grade only to reach 28-40%, the specific humidity of classification selection by winnowing thus ore dressing better effects if.
Technology advanced person of the present invention, equipment investment is few, utilizes air as medium classification selection by winnowing ore in sand form, and it is poor to have dwindled granularity in other ore in sand form of same level.It is poor to have increased sinking speed.Improved FeS
2The rate of recovery, reduced the wasting of resources, improved product grade.
The classification selection by winnowing of pyrite concentrate is a dry production, and the whole production flow process can seal; Adopt exhausting can ensure that after the deduster dedusting production site and surrounding environment are not contaminated; Avoided the water pollution fully, stopped to discharge waste residue, waste water to solution cavity and river; Because pyrite concentrate is not moisture, therefore also reduced corrosion to means of transport and transport routes; The pyrite concentrate of doing has also reduced the loss of sulphur, has also created condition for subsequent production.
The waste residue of being collected is meticulous clearly demarcated, can be used for as required opening up wasteland, goes back woods, restores abandoned land to cultivation, goes back grass and hole, backfill ore deposit.
In sum, advantage of the present invention:
1, improved the rate of recovery of troilite, reduced the wasting of resources;
2, improved the pyrite concentrate grade;
3, eliminated water pollution and environmental pollution and destroyed.
Description of drawings:
Fig. 1 is a process chart of the present invention.
Fig. 2 is the vibration sieve plate structure chart.
The specific embodiment:
At the deficiency of existing manufacturing technique, we are to troilite (FeS
2) analyze and research.1. troilite can be divided into by the crystalline structure difference, and the pyrite density of cubic system is the 4.95-5 gram per centimeter
3, 2. rhombic marcasite, density is 4.5 gram per centimeters
3, it is simple in structure, and property is crisp; As seen its active principle FeS
2With the anisotropy of impurity, be optional branch under certain condition according to crystal.
The complexity that the ore choosing divides can be similar to by (δ usually
2-Δ)/(δ
1-Δ) ratio is evaluated.δ in the formula
1Be little proportion ore particle proportion; Be impurity in the troilite.δ
2Be big proportion ore particle proportion, i.e. active principle FeS in the troilite
2Crystallization; Δ is a medium proportion.In order to overcome the deficiency place in the wet production, we intend using medium air.Learn by test.When this ratio mineral greater than 2.5 time just divide than being easier to choosing.If this ratio is less than 1.25.Mineral are with regard to difficult choosing branch.
Through test FeS
2Crystal proportion is 4.4 gram per centimeters
3Impurity proportion is 2.4 gram per centimeters
3Air specific weight is 0.00129 gram per centimeter
3Must this ratio be 1.83 as calculated; Illustrate that primary troilite can select branch.
In the existing wet production, troilite has only been carried out second-time breakage, fragmentation has especially for the second time produced crosses crushing phenomenon, with active principle FeS
2Crystal has together been pulverized.Cause follow-up work to FeS
2Choosing divide difficulty.
In order to solve the pulverizing problem.We regulate sieve aperture, change second-time breakage into tertiary crushing.For the first time adopt jaw crusher 2, granularity is controlled at below the 50mm; Broken for the second time employing hammer mill 4 is controlled at granularity below the 20mm; Because troilite enbrittles, in order not produce crushing phenomenon, broken for the third time we adopt double-roll crusher 5.The troilite fineness of sand of 0.1-8mm can reach 95% after two roller fragmentations, has reduced FeS so as much as possible
2Crystal is destroyed, and troilite fineness of sand difference is diminished.
The common ore particle particle d that the proportion coarsegrain is little when sedimentation
2The particle d big with the proportion small grain size
1With identical velocity sedimentation, claim to wait and fall particle; d
1/ d
2=l
0, claim ratio of equilibrium settling velocity.As seen the big young pathbreaker of ore particle influences ore particle by than gravity treatment branch.
In order to make FeS well
2With the choosing branch of impurity, we carry out strict classification to the troilite sand through tertiary crushing.
Ore in sand form elevator 9 is delivered to the hopper 10 of vibratory sieve 11 with ore in sand form, and the ore in sand form that sieves slides through blind plate 24 and enters air classifier 23.Air classifier has air inlet 12, finished bin 13, semi-finished product storehouse 15, impurity storehouse 17, control valve 19.There are weight valve counterweight stone roller 14, adjustable plate 16 and weight valve dead lock 18 in each storehouse.Air classifier 23 is connected with deduster 20, and deduster 20 is connected with air exhauster 22, and the windlass main has control valve 21.Vibratory sieve 11 has two groups of sieve plates.
In order to alleviate the sieve plate load-bearing, with Φ 2mm sieve plate ore in sand form being divided into two tunnel granularity ores in sand form with 2-8mm is one the tunnel through sieve plate 26,27,28,29,30 classification selection by winnowing, will be one the tunnel through sieve plate 33,34,35,36,37 classification selection by winnowing less than 2mm.Sieve removes fine granularity sand earlier, back sieve coarseness sand.
One group of air classifier is arranged under every group of sieve plate, and air classifier links to each other with the windlass main, and ten rank sieve plates can dwindle mesh size difference according to customer requirements also can increase the sieve plate number, carries out selected to ore in sand form.Also can reduce the sieve plate number according to user's needs roughly selects.Also big as the sieve supporting power, can divide three the road or multichannel screening.
Claims (5)
1, the classification wind selection method of pyrite concentrate, its step is as follows:
1) primary troilite is broken into the coarse sand of the granularity of most of particle less than 50mm with jaw crusher,
2) coarse sand is broken into the medium sand of the granularity of a most of material less than 20mm with hammer mill,
3) medium sand is ground into the fine sand of the granularity of most of particle less than 8mm with double-roll crusher,
4) fine sand is delivered to vibratory sieve, enter the air inlet end of air classifier through the fine sand in sieve plate hole, air classifier has the pyrite concentrate finished bin, and semi-finished product storehouse, impurity storehouse are arranged in order below the air channel between air inlet and air outlet, and air classifier is connected with the windlass main.
2, according to the described method of claim 1, it is characterized in that vibratory sieve (11) has at least one group of sieve plate, every group of sieve plate connected to form by sieve aperture rank size successively by several sieve plates, an air classifier is arranged under each sieve plate, the sieve plate of sieve aperture rank minimum is positioned at below the hopper (10), and ore in sand form riser machine (9) is delivered to hopper (10) with the fine sand that generates in the step 3).
3, according to the described method of claim 2, it is characterized in that vibratory sieve (11) has two groups of sieve plates, first group of sieve plate divides sieve plate (25) and sieve plate (26 by Φ 2mm, 27,28,29,30) form, divide and connect elevator hopper outlet (31) on the sieve plate (25), under hopper (32) is arranged, second group of sieve plate is by sieve plate (33,34,35,36,37) form, sieve plate (33) is by accepting the material of hopper (32) less than the slide sandpipe (38) of Φ 2mm, sieve plate (26,27,28,29,30,33,34,35,36,37) respectively there is an air classifier to be connected under with the windlass main, the windlass main is connected with air exhauster (22), control valve (21) is arranged, control valve is also arranged on each air classifier and windlass main's the tube connector, and the windlass main is connected with deduster (20).
4, according to the described method of claim 1, it is characterized in that the pyrite concentrate of air classifier finished bin is used to produce sulfuric acid, the ore in sand form in semi-finished product storehouse is sent into the double-roll crusher fragmentation again or is sent into the air classifier sorting, and the waste residue in impurity storehouse is discharged.
5, according to the described method of claim 1, it is characterized in that double-roll crusher (5) is connected with material hole (7) by pipeline, pipeline is connected with deduster (20) by exhausting pipeline (8).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100213225A CN1314494C (en) | 2005-07-26 | 2005-07-26 | Wind force sorting method for classifying refined sulfur sand |
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|---|---|---|---|
| CNB2005100213225A CN1314494C (en) | 2005-07-26 | 2005-07-26 | Wind force sorting method for classifying refined sulfur sand |
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| CN1314494C CN1314494C (en) | 2007-05-09 |
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