WO2018124909A1 - Способ пневматического обогащения минерального сырья - Google Patents
Способ пневматического обогащения минерального сырья Download PDFInfo
- Publication number
- WO2018124909A1 WO2018124909A1 PCT/RU2016/000936 RU2016000936W WO2018124909A1 WO 2018124909 A1 WO2018124909 A1 WO 2018124909A1 RU 2016000936 W RU2016000936 W RU 2016000936W WO 2018124909 A1 WO2018124909 A1 WO 2018124909A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- chamber
- particles
- vertical chamber
- sections
- raw materials
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
- B07B4/08—Separating solids from solids by subjecting their mixture to gas currents while the mixtures are supported by sieves, screens, or like mechanical elements
Definitions
- the invention relates to the field of mineral processing and can be used to create mobile processing plants for processing and classification of raw materials into fractions in almost any suitable conditions, including at ambient temperatures from -50 to +50 ° FROM.
- the technology for enrichment of raw materials should be universal, easily tunable for processing various types of mineral raw materials, and at the same time it should be suitable for the enrichment of materials with different densities (coal, ore, industrial waste and non-metallic raw materials).
- the processing process should include the ability to quickly and smoothly change the technological regimes depending on the properties of the processed raw materials, requirements for the quality of processed products, etc., which will allow the creation of mobile enrichment modular type factories with a low level of capital costs for their delivery and installation.
- the technology for enrichment of raw materials should be highly efficient, ensuring high quality of the products obtained, and so that after its application, only those wastes that are not suitable for further processing or direct use remain.
- the technology of enrichment of raw materials should be all-weather and year-round, so that the process does not take place seasonally with temporary attraction of labor resources, but proceeds constantly - with year-round employment of the local population.
- the technological cycle of enrichment of raw materials should include a range of ambient temperatures from -50 to +50 ° ⁇ and should allow the equipment to be placed outdoors or using light type shelters.
- the method allows year-round enrichment of raw materials under the open sky or using light type shelters.
- the main disadvantage of the known method of enrichment of raw materials is the low efficiency of the process of separation of products, a high degree of infection of heavy products with light fractions, because the process is carried out in a product layer located on a sieve.
- An increase in the layer thickness necessary for the formation of separate layers from products of different densities leads to its high resistance, and as a consequence of its low degree of loosening and low fraction separation efficiency.
- the known method of enrichment of raw materials does not allow for highly efficient separation of the raw materials into fractions due to the high influence of the moisture content of the raw material on the process.
- the known method allows year-round enrichment of raw materials in the open air or using light type shelters, as well as quick process adjustment for processing various types of mineral raw materials by changing the air flow rate.
- the main disadvantage of this method is its insufficiently high productivity of the selection of particles of a given size, which is due to the following reasons.
- the basis of this invention is the task of increasing the productivity of the known method while maintaining the efficiency of the separation process.
- the specified task in a method of pneumatic enrichment of mineral raw materials comprising placing the enriched raw material on a breathable surface intersecting a vertical chamber with an upward air flow, lifting light fractions from a breathable surface made in the form of a conveyor passed below the lower base of the vertical chamber in which a volume pseudo-boiling layer of particles of a given density is formed by choosing the air flow velocity, into which they enter and pass unhindered through it particles of lower density, and then upward air flow are transferred from the vertical chamber to the gravity deposition chamber, it is decided that the vertical chamber is divided by vertical bulkheads into two or more successively and / or parallel sections, while the upper bases of the sections are combined inside the vertical chamber general air flow transporting particles into the gravitational deposition chamber.
- the specified implementation of the method allows in one vertical chamber, designed to separate particles at a given density boundary, to organize multistage selection of these particles due to the simultaneous impact on the particles particles of several consecutive vertical flows, each of which entrains a particle in its section, thereby reducing its horizontal velocity and horizontal component of kinetic energy, which reduces the compaction of the pseudo-boiling layer in each section of the vertical chamber and ensures uniform distribution of the pseudo-boiling layer over the entire area of the vertical chamber, thereby providing increased productivity of the method.
- a known vertical chamber selects particles with a density below a predetermined density, for example 1.4 g / cm 3 . Since the material to be separated can contain a large number of particles with a density less than the separation density, the separation of the vertical chamber into sections having equal or different cross-sectional areas and, accordingly, the same or different flow rates in them, which will allow a phased the separation of particles with a density less than specified, thereby reducing the load on the last chamber and increasing the efficiency of separation of particles with a density of up to 1.4 g / cm 3 .
- different sections of the vertical chamber can have the same or different height of the base of the sections above the conveyor, thereby ensuring the creation of a pseudo-boiling layer of different density in each section of the vertical chamber, which will allow preliminary separation of particles with the density is much lower than the set, and in the last sections - to conduct a more accurate and effective separation of particles by density.
- Dividing the vertical chamber into sections located along the direction of movement of the conveyor allows you to eliminate the unevenness of the air velocity field in the vertical chamber in cross section (along the conveyor), and dividing the chamber into sections located across the direction of movement of the conveyor allows you to eliminate the unevenness of the air velocity field in the vertical chamber , both in the transverse and in the longitudinal section (perpendicular to the conveyor), as well as to prevent the transverse and longitudinal flows of pseudo-boiling particles - layer and ensure its uniformity over the entire cross section of the chamber.
- a vertical chamber with several vertical sections, in each of which there is a volume pseudo-boiling layer of particles of a given density allows you to organize multi-threaded pneumatic separation from the enriched raw material of particles of the desired fraction with greater productivity and high selectivity, which has no analogues among known methods currently used in pneumatic separation plants, which means that it meets the criterion of "inventive step".
- FIG. 1-6 The inventive method is illustrated by drawings in FIG. 1-6.
- FIG. 1 shows a block diagram of a plant with a vertical chamber for pneumatic enrichment of mineral raw materials, on which the vertical chamber is made undivided into sections, as in the prototype, and arrows show the trajectories of particles of enriched mineral raw materials that are sucked from an air-permeable conveyor and their interaction with air flow and particles of a pseudo-boiling layer.
- FIG. 2a and 26 are views A showing particle distribution in a pseudo-boiling layer at low and high conveyor speeds: at a high conveyor speed, the pseudo-boiling layer is shifted to the front (in the direction of conveyor movement) wall of the vertical chamber.
- FIG. Figure 3 shows a fragment of the input part of the installation for pneumatic mineral processing of minerals, which shows a vertical 3-section chamber, the lower bases of the sections of which are at the same height with respect to the conveyor, where: 12 are the walls of the vertical chamber; 13a-13b - direction the movement of the suction air flows in sections of the vertical chamber; 14 - a breathable conveyor with particles of enriched mineral raw materials 15; 16-16c - lower bases of the sections of the vertical chamber; 17-28 - the trajectory of the particles of the enriched mineral raw materials inside the chamber sections.
- FIG. Figure 4 shows a fragment of the input part of the installation for pneumatic mineral processing of minerals, which shows a vertical 3-section chamber, the lower bases of the sections of which are at different heights relative to the conveyor, where: 29 - walls of the vertical chamber; 30 - breathable conveyor with particles of enriched mineral raw materials 31; 32a - 32c show the direction of movement of the suction air flows in sections of the vertical chamber; 33a - ZZv - the lower base sections of the vertical chamber.
- FIG. 5 is a fragment of the inlet of the installation for pneumatic mineral processing of minerals, which depicts a vertical multi-sectional chamber consisting of three sequentially installed sections located along the conveyor and three sequentially installed sections located across the conveyor, the lower bases of all sections are at the same height relative to the conveyor, where: 34 is an air-permeable conveyor; 35 is a multi-section vertical chamber, consisting of three rows of sections 36 '- 38' located along the direction of movement of the breathable conveyor 34 and three rows of sections 36 "- 36" "located across the direction of its movement, and Fig. 6 shows a drawing explaining the distribution of particles of enrichable mineral raw materials within sections 35 "- 35" "located across the conveyor 34.
- the lock gate 10 opens and the deposited particles are removed.
- the density of the particles from which the pseudo-boiling layer is formed is determined by the air flow rate 2.
- the distribution of particles in the pseudo-boiling layer corresponds to the figure in Fig. 2a. and with increasing speed of the conveyor 3, the particle distribution takes the form shown in the figure in fig.2b, i.e. the pseudo-boiling layer moves to the rear (in the direction of conveyor movement) wall of the vertical chamber.
- the efficiency of the separation process in the vertical chamber is reduced.
- Figure 5 presents another embodiment of the proposed method, in which the vertical chamber 35 is multi-sectional, consisting of three sequentially installed sections located along the conveyor 36 '- 38' and three sequentially installed sections 36 "- 36" " located across the conveyor 34, the lower bases of all sections being at the same height relative to the conveyor 34.
- Figure 6 shows the distribution of particles of enriched mineral raw materials inside sections 36 "-36""located across the conveyor 34. This arrangement of the sections inside the separation chamber can simultaneously ensure uniformity of the pseudo-boiling layer, both in longitudinal and in cross section vertical chamber.
- Fig.6 shows the distribution of particles of enriched mineral raw materials inside sections 36 "- 36""located across the conveyor 34.
- a pilot plant for the separation of slag from ferrochromic production was manufactured with the aim of further producing ferrochrome.
- the process of pneumatic enrichment was carried out on a vertical chamber, which consisted of 3 consecutive vertical sections (Fig. 3).
- the slag Prior to the start of pneumatic processing, the slag was previously crushed to a particle size of 0–6 mm and fed to a conveyor belt with a web made of a mesh with a 1 mm mesh, 600 mm wide, and a speed of 0.5–1.5 m / s.
- the rectangular vertical chamber is made with a cross section of 600x150 mm and a height of 900 mm and is divided inside by vertical partitions into 3 sections of the same cross section.
- the chamber is connected by an air duct to a gravity deposition chamber with a diameter of 1200 mm and a height of 2500 mm.
- the air flow in the vertical chamber was selected so that a product was released in the chamber that did not contain ferrochrome grains and had a density of less than 2.9-3.5 t / mZ, and metal ferrochrome with insignificant inclusions of slag remained as a commodity concentrate after passing through the chamber.
- the indicated vertical chamber made it possible to evenly distribute the pseudo-boiling layer and increase the plant productivity by a factor of 1.6 compared to a single rectangular vertical separation chamber with a cross section of 600x150 mm and a height of 900 mm.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Combined Means For Separation Of Solids (AREA)
- Preparation Of Fruits And Vegetables (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/RU2016/000936 WO2018124909A1 (ru) | 2016-12-27 | 2016-12-27 | Способ пневматического обогащения минерального сырья |
EA201800424A EA201800424A1 (ru) | 2016-12-27 | 2016-12-27 | Способ пневматического обогащения минерального сырья |
ZA2019/00870A ZA201900870B (en) | 2016-12-27 | 2019-02-11 | Method for pneumatically separating mineral raw materials |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/RU2016/000936 WO2018124909A1 (ru) | 2016-12-27 | 2016-12-27 | Способ пневматического обогащения минерального сырья |
Publications (1)
Publication Number | Publication Date |
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WO2018124909A1 true WO2018124909A1 (ru) | 2018-07-05 |
Family
ID=62710629
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/RU2016/000936 WO2018124909A1 (ru) | 2016-12-27 | 2016-12-27 | Способ пневматического обогащения минерального сырья |
Country Status (3)
Country | Link |
---|---|
EA (1) | EA201800424A1 (ru) |
WO (1) | WO2018124909A1 (ru) |
ZA (1) | ZA201900870B (ru) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU692638A1 (ru) * | 1977-08-15 | 1979-10-25 | Челябинский Институт Механизации И Электрификации Сельского Хозяйства "Чимесх" Министерства Сельского Хозяйства Ссср | Пневматический классификатор дл разделени сыпучих материалов |
SU1217495A1 (ru) * | 1984-08-20 | 1986-03-15 | Всесоюзный Ордена Трудового Красного Знамени Научно-Исследовательский И Проектный Институт Механической Обработки Полезных Ископаемых "Механобр" | Пневматический классификатор |
SU1731297A1 (ru) * | 1990-04-09 | 1992-05-07 | Уральский политехнический институт им.С.М.Кирова | Пневматический классификатор |
RU2354462C1 (ru) * | 2007-12-26 | 2009-05-10 | Алексей Никифорович Зюлин | Пневмосепарирующий канал зерна |
EA022959B1 (ru) * | 2011-12-22 | 2016-03-31 | Андрей Иванович СТЕПАНЕНКО | Способ пневматического обогащения минерального сырья |
-
2016
- 2016-12-27 WO PCT/RU2016/000936 patent/WO2018124909A1/ru active Application Filing
- 2016-12-27 EA EA201800424A patent/EA201800424A1/ru unknown
-
2019
- 2019-02-11 ZA ZA2019/00870A patent/ZA201900870B/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU692638A1 (ru) * | 1977-08-15 | 1979-10-25 | Челябинский Институт Механизации И Электрификации Сельского Хозяйства "Чимесх" Министерства Сельского Хозяйства Ссср | Пневматический классификатор дл разделени сыпучих материалов |
SU1217495A1 (ru) * | 1984-08-20 | 1986-03-15 | Всесоюзный Ордена Трудового Красного Знамени Научно-Исследовательский И Проектный Институт Механической Обработки Полезных Ископаемых "Механобр" | Пневматический классификатор |
SU1731297A1 (ru) * | 1990-04-09 | 1992-05-07 | Уральский политехнический институт им.С.М.Кирова | Пневматический классификатор |
RU2354462C1 (ru) * | 2007-12-26 | 2009-05-10 | Алексей Никифорович Зюлин | Пневмосепарирующий канал зерна |
EA022959B1 (ru) * | 2011-12-22 | 2016-03-31 | Андрей Иванович СТЕПАНЕНКО | Способ пневматического обогащения минерального сырья |
Also Published As
Publication number | Publication date |
---|---|
ZA201900870B (en) | 2019-12-18 |
EA201800424A1 (ru) | 2019-11-29 |
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