CN113941508B

CN113941508B - Ore screening machine

Info

Publication number: CN113941508B
Application number: CN202111203847.6A
Authority: CN
Inventors: 刘龙海; 张成立; 陆财天; 童敏; 赵小聪
Original assignee: Sichuan Desheng Group Vanadium Titanium Co Ltd
Current assignee: Sichuan Desheng Group Vanadium Titanium Co Ltd
Priority date: 2021-10-15
Filing date: 2021-10-15
Publication date: 2023-06-02
Anticipated expiration: 2041-10-15
Also published as: CN113941508A

Abstract

The invention discloses an ore screening machine which comprises a screening box, a rotating column, a rotating motor, a primary screening disc, a fine screening box and a guide plate, wherein the rotating column is arranged at the top of the screening box and penetrates through the screening box, the rotating motor is arranged at the top of the rotating column in a connecting mode, the primary screening disc is arranged at the bottom of the rotating column in a connecting mode, the fine screening box is arranged at the bottom of the primary screening disc, and the guide plate is arranged along the inner wall of the screening box in a spiral mode. The ore screening machine is provided with multiple powder screening devices, and can be used for screening multiple kinds of powder.

Description

Ore screening machine

Technical Field

The invention relates to the field of ore screening devices, in particular to an ore screening machine.

Background

In the steel production process, a sintering process is first performed. Sintering is the process in which a powder or powder compact is heated to a temperature below the melting point of the essential components therein and then cooled to room temperature in a certain way and at a certain speed. As a result of sintering, bonding occurs between the powder particles, and the strength of the sintered body increases, turning the aggregates of powder particles into agglomerates of grains, thereby obtaining the desired physical, mechanical properties of the article or material.

Before sintering, the ore is crushed into powder, so that various powdered iron-containing materials are mixed with proper amount of fuel and flux, proper amount of water is added, and after mixing and pelletizing, the materials are subjected to a series of physical and chemical changes on sintering equipment to bond the powder particles into blocks.

The existing ore powder is screened after being crushed, and redundant screening is not carried out on coarse ores, so that a plurality of coarse ores are crushed again, an original stone crushing device is adopted in the re-crushing process, if a small-strength stone crusher is used, the device is damaged by a large-size coarse ore, but the power consumption of the coarse ore is high by the large-size stone crusher, and the energy consumption is high.

Disclosure of Invention

The invention provides an ore screening machine capable of screening ores with various stone diameters in one device to simultaneously screen various mineral powder.

The invention firstly provides an ore screening machine which comprises a screening box, a rotating column, a rotating motor, a primary screening disc, a fine screening box and a guide plate, wherein the rotating column is arranged at the top of the screening box and penetrates through the screening box; the primary screening disc comprises a conical plate, a fine powder baffle plate annularly arranged on the conical plate and inclined strips circumferentially arranged on the fine powder baffle plate; the top of the screening box is provided with a feed inlet, the bottom of the screening box is provided with a discharge outlet, and the discharge outlet is arranged in the fine screening box.

The invention also provides the following optimization scheme:

preferably, the discharge hole is arranged in an inverted cone shape.

Preferably, the fine powder baffle plate is annularly provided with a plurality of layers.

Preferably, the diagonal strips extend obliquely in the radial direction of the primary screening tray.

Preferably, the primary screening tray is provided with primary screening tray holes.

Preferably, the guide plate is provided with a guide plate hole.

Preferably, the feed inlet is disposed directly above the topmost fines baffle of the primary screen tray.

Preferably, the side surface of the screening box is provided with a stone outlet.

Preferably, a fine screen box breather pipe is arranged on the side surface of the bottom of the fine screen box.

Preferably, a discharge port air inlet pipe is arranged on the side face of the discharge port.

The beneficial effects of the invention are as follows:

1. the ore screening machine is provided with multiple powder screening devices, so that multiple screening of powder can be performed;

2. the ore screening machine of the invention utilizes gravity to carry out multiple screening of the powder, and the screening of other powder is not influenced in the powder screening process;

3. in the multiple powder screening process of the ore screening machine, large-size ores can be transferred by utilizing the rotation force, so that the possibility of blockage is reduced;

4. the ore screening machine disclosed by the invention reduces the impact of ores on the inner wall of the screening box in the process as much as possible during screening, guides the ores to roll through the inner wall and further performs powder screening in the process.

Drawings

FIG. 1 is a front view of an ore screening machine of the present invention;

FIG. 2 is a perspective view of the mineral separation screening machine of the present invention;

FIG. 3 is a cross-sectional view of the mineral separation screen machine of the present invention;

FIG. 4 is a front perspective view of the mineral separation screen machine of the present invention;

FIG. 5 is a top perspective view of the mineral separation screen machine of the present invention;

FIG. 6 is a perspective view of the mineral separation screen machine of the present invention;

specific reference numerals are as follows:

1, screening a box; 2, rotating the column; 3, rotating the motor; 4, a primary screening disc; 5 fine screen boxes; 6, guiding plates; 11 feed inlets; 12 discharge ports; 13 stone outlet; 14, a discharge port air inlet pipe; a 41 conical plate; 42 fine powder baffles; 43 diagonal stripes; 44 primary screen tray apertures; 51 fine screen box vent pipe; 61 guide plate holes.

Detailed Description

The present invention will be described in further detail with reference to specific embodiments thereof in order to enable those skilled in the art to better understand the technical aspects of the invention.

As shown in fig. 1 to 6, the ore screening machine provided by the invention comprises a screening box 1, a rotary column 2 arranged at the top of the screening box 1 and penetrating through the screening box 1, a rotary motor 3 connected with the top of the rotary column 2, a primary screening disc 4 connected with the bottom of the rotary column 2, a fine screening box 5 arranged at the bottom of the primary screening disc 4, and a guide plate 6 spirally arranged along the inner wall of the screening box 1; the primary screening disc 4 comprises a conical plate 41, a fine powder baffle plate 42 annularly arranged on the conical plate 41, and inclined strips 43 circumferentially arranged on the fine powder baffle plate 42; the top of the screening box 1 is provided with a feed inlet 11, the bottom of the screening box 1 is provided with a discharge outlet 12, and the discharge outlet 12 is arranged in the fine screening box 5.

As shown in fig. 1, the screening box 1 is preferably arranged in a circular shape, and the screening box 1 comprises an inner cavity and an outer cavity, wherein qualified fine powder is screened into the inner cavity, and ore with a slightly larger size is screened into the outer cavity through a primary screening disc 4. The inner cavity part is enclosed into an inner space through the primary screening disc 4, the fine screening box 5 and the discharge hole 12 for filtering fine powder. The primary screening tray 4 is arranged in a conical shape, and the conical plate 41 is enclosed at the top of the fine screening box 5 and covers the top of the fine screening box 5. The conical plate 41 is in rotary connection with the fine screen box 5. The fine screen box 5 is preferably arranged in a round shape, the fine screen box 5 is fixedly connected with the bottom of the screening box 1, the fine screen box 5 divides the screening box 1 into an inner cavity and an outer cavity, and the discharge port 12 is preferably arranged at the bottom of the fine screen box 5 and isolated from the outer cavity of the screening box 1. The center of the top of the sub-screen box 1 is provided with a rotating column 2, and the rotating column 2 penetrates through the top of the sub-screen box 1 and rotates relative to the sub-screen box 1. The top of the rotary column 2 is connected with a rotary motor 3, and the rotary motor 3 drives the rotary column 2 to horizontally and circumferentially rotate around the center point of the screening box 1. The top center of the primary screening disc 4 is fixedly connected with the rotary column 2. And the radius of the rotating column 2 is preferably smaller than the radius of the fine powder baffle 42, and the feed port 11 is preferably provided outside the rotating column 2. The fine powder baffle 42 is annularly provided on the upper surface of the conical plate 41 and slightly higher than the conical plate 41, and the height of the fine powder baffle 42 depends on the powder particle diameter of the fine powder to be screened and the magnitude of the rotational force. The fines baffle 42 is preferably positioned to a height of 2-10 cm. The fine powder baffle 42 is provided with inclined ribs 43 which are inclined slightly outwardly, and the extending direction of the inclined ribs 43 is the radial extending direction of the fine screen box 5. The diagonal strips 43 are preferably circumferentially equidistant a plurality and the length of the diagonal strips 43 is set to be approximately the same as the radius length of the largest stone block. The guide plate 6 is provided on the inner wall of the screening box 1 and extends helically downwards to the bottom position of the screening box 1.

The discharge opening 12 is arranged in an inverted cone shape. The discharge opening 12 is arranged in an inverted cone shape to facilitate the falling and collection of the fine powder.

The fine powder baffle 42 is annularly provided with a plurality of layers. The fine powder baffle plate 42 is provided with a plurality of layers of fine sieves capable of carrying out a plurality of times on ore powder, and after the innermost fine powder baffle plate 42 can collect enough fine powder in a short time, the sieve holes can be blocked by a plurality of coarse ores, and the fine powder in the fine powder baffle plate 42 can slide into the fine powder baffle plate 42 at the outer side under the action of gravity under the condition that the powder in the inner fine powder baffle plate 42 is enough. When the powder screening efficiency in the plurality of fine powder baffles 42 is lowered, the rotating electric machine 3 may be started to perform the ore removal operation in the fine powder baffles 42.

As shown in fig. 6, the diagonal members 43 extend obliquely in the radial direction of the primary screening tray 4. The diagonal strips 43 may extend in the radial direction of the primary screening tray 4 or in other directions, but preferably extend in a direction coinciding with the direction of rotation.

The primary screening tray 4 is provided with primary screening tray holes 44. The radius of the primary screen disc apertures 44 is preferably greater than the appropriate radius for the greatest fines, more preferably, the primary screen disc apertures 44 may be configured as circular apertures or as arcuate apertures, and more preferably, the circular apertures and arcuate apertures may be configured simultaneously.

The guide plate 6 is provided with a guide plate hole 61. The purpose of the guide plate holes 61 is to slide some slightly smaller ore that is thrown onto the guide plate 6 under the force of rotation through the guide plate holes 61 to directly under the guide plate 6, the guide plate holes 61 being preferably arranged at a position away from the lowest part of the guide plate 6. This allows large ore and small ore sliding to the bottom of the guide plate 6 to be separated into a falling zone.

The inlet 11 is arranged directly above the top-most fines baffle 42 of the primary screen tray 4. The feed opening 11 is provided at a position directly above the primary screening tray 4, and the feed opening 11 may be provided in plural, and the feed opening 11 is preferably provided at an outer position of the rotary column 2.

The side of the screening box 1 is provided with a stone outlet 13. The stone outlet 13 is preferably arranged at a position at the bottom of the guide plate 6, which facilitates the sliding out of large stones. More preferably, the stone outlet 13 coincides with the direction of extension of the bottom of the guide plate 6, which enables large stone to roll directly from the guide plate 6 to the stone outlet 13.

The side surface of the bottom of the fine screen box 5 is provided with a fine screen box vent pipe 51. The fine screen bin vent tube 51 is preferably positioned in an inclined downward and outward orientation that reduces the flow of external cavity powder into the internal cavity.

A discharge port air inlet pipe 14 is arranged on the side face of the discharge port 12. The outlet air intake pipe 14 is provided to extend obliquely upward and outward.

Examples

As shown in fig. 1 to 6, the ore screening machine of the present embodiment comprises a screening box 1, a rotary column 2 arranged at the top of the screening box 1 and penetrating through the screening box 1, a rotary motor 3 connected with the top of the rotary column 2, a primary screening tray 4 connected with the bottom of the rotary column 2, a fine screening box 5 arranged at the bottom of the primary screening tray 4, and a guide plate 6 spirally arranged along the inner wall of the screening box 1; the primary screening disc 4 comprises a conical plate 41, a fine powder baffle plate 42 annularly arranged on the conical plate 41, and inclined strips 43 circumferentially arranged on the fine powder baffle plate 42; the top of the screening box 1 is provided with a feed inlet 11, the bottom of the screening box 1 is provided with a discharge outlet 12, and the discharge outlet 12 is arranged in the fine screening box 5. The discharge opening 12 is arranged in an inverted cone shape. The fine powder baffle 42 is annularly provided with a plurality of layers. The diagonal strips 43 extend obliquely in the radial direction of the primary screening tray 4. The primary screening tray 4 is provided with primary screening tray holes 44. The guide plate 6 is provided with a guide plate hole 61. The inlet 11 is arranged directly above the top-most fines baffle 42 of the primary screen tray 4. The side of the screening box 1 is provided with a stone outlet 13. The side surface of the bottom of the fine screen box 5 is provided with a fine screen box vent pipe 51. A discharge port air inlet pipe 14 is arranged on the side face of the discharge port 12.

The use method of the ore screening machine of the embodiment comprises the following steps:

coarse ore powder to be screened after crushing is poured into the screening box 1 from the feed inlet 11, and the low-speed gear of the rotating motor 3 is started, and the rotating motor 3 rotates at a low speed to drive the rotating column 2 to rotate at a low speed. The coarse mineral powder falls onto the primary screen tray 4, and the large mineral tends to roll outward when falling onto the primary screen tray 4 under the action of gravity. At this time, due to the length of the diagonal members 43, the large ore cannot be stabilized on the primary screen tray 4, and the excessively large stone blocks directly slide out of the diagonal members 43 from the primary screen tray 4 and fall onto the guide plate 6. The small stones are retained in the primary screen pan 4 by the diagonal members 43, which primary screen pan 4 rotates to rotate the stones in the primary screen pan 4, thereby causing fines to slide from the primary screen pan apertures 44 in the primary screen pan 4 into the fine screen box 5. After coarse ore powder is subjected to one-wave screening, the speed of the rotating motor 3 is increased, so that medium-sized ore is thrown out of the primary screening disc 4, and as the arc-shaped screen holes of the primary screening disc holes 44 are formed in the innermost side of the fine powder baffle 42, fine powder can be rotated to the arc-shaped screen hole positions under the action of rotating force, the powder on the primary screening disc 4 can be cleaned, qualified fine powder can be screened into the fine screening box 5, and unqualified coarse ore can be screened into the outer cavity of the screening box 1 through the guide plate 6. Proper amount of drying or cooling gas can be introduced into the discharge port air inlet pipe 14 so as to prevent excessive moisture or excessive temperature in the box, and the gas sequentially passes through the inner cavity and the outer cavity to form circulating air flow through the discharge port air inlet pipe 14 and the fine screen box air pipe 51 respectively.

The foregoing is merely a preferred embodiment of the present invention, and it should be noted that the above-mentioned preferred embodiment should not be construed as limiting the invention, and the scope of the invention should be defined by the appended claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.

Claims

1. An ore screening machine, characterized in that: the device comprises a screening box, a rotating column arranged at the top of the screening box and penetrating through the screening box, a rotating motor connected with the top of the rotating column, a primary screening disc connected with the bottom of the rotating column, a fine screening box arranged at the bottom of the primary screening disc, and a guide plate spirally arranged along the inner wall of the screening box; the primary screening disc comprises a conical plate, a fine powder baffle plate annularly arranged on the conical plate and inclined strips circumferentially arranged on the fine powder baffle plate; the top of the screening box is provided with a feed inlet, the bottom of the screening box is provided with a discharge outlet, and the discharge outlet is arranged in the fine screening box;

the fine powder baffle plate is annularly provided with a plurality of layers;

the primary screening disc is provided with primary screening disc holes;

the primary screening disc is simultaneously provided with two primary screening disc holes, namely a circular hole and an arc hole.

2. The ore screening machine of claim 1, wherein: the discharge hole is arranged in an inverted cone shape.

3. The ore screening machine of claim 1, wherein: the diagonal strips extend obliquely along the radial direction of the primary screening disc.

4. The ore screening machine of claim 1, wherein: the guide plate is provided with a guide plate hole.

5. The ore screening machine of claim 1, wherein: the feed inlet is arranged right above the fine powder baffle plate on the topmost layer of the primary screening disc.

6. The ore screening machine of claim 1, wherein: the side of the screening box is provided with a stone outlet.

7. The ore screening machine of claim 1, wherein: the side surface of the bottom of the fine screen box is provided with a fine screen box vent pipe.

8. The ore screening machine of claim 1, wherein: the side of the discharge hole is provided with a discharge hole air inlet pipe.