阅读说明：本技术 带特定导向槽的螺旋溜槽选矿机 (Spiral chute concentrating machine with specific guide groove ) 是由 刘惠中 宋小军 殷明强 张启忠 于 2019-09-06 设计创作，主要内容包括：本发明公开了一种带特定导向槽的螺旋溜槽选矿机,包括螺旋槽、分矿器、给矿槽、支架、截矿槽、接矿斗,其特征在于,螺旋槽的每圈槽面上配置不同数量的沟槽,第一圈均匀排布12条沟槽,第二圈均匀排布9条沟槽,第三圈均匀排布7条沟槽,第四圈均匀排布8条沟槽,第五圈均匀排布9条沟槽。螺旋槽表面上的沟槽形状为直线形,沟槽长度(A)为螺旋槽直径(D)的1/3,靠圆心端离螺旋槽内缘距离(C)为螺旋槽直径(D)的1/20,沟槽与径向方向呈28-32°夹角,且朝向为由螺旋槽外侧流向螺旋槽内侧,每圈最后一个沟槽的最低端(内侧端)离每圈的末端径线垂直距离(B)为20毫米,螺旋槽的每个沟槽的横截面形状为直角三角形。本发明可以有效提高选矿效率。(the invention discloses a spiral chute concentrating machine with a specific guide groove, which comprises a spiral groove, an ore separator, an ore feeding groove, a support, an ore cutting groove and an ore receiving hopper, and is characterized in that grooves with different numbers are arranged on each circle of groove surface of the spiral groove, 12 grooves are uniformly distributed in the first circle, 9 grooves are uniformly distributed in the second circle, 7 grooves are uniformly distributed in the third circle, 8 grooves are uniformly distributed in the fourth circle, and 9 grooves are uniformly distributed in the fifth circle. The shape of the groove on the surface of the spiral groove is linear, the length (A) of the groove is 1/3 of the diameter (D) of the spiral groove, the distance (C) from the end close to the center of the circle to the inner edge of the spiral groove is 1/20 of the diameter (D) of the spiral groove, the included angle between the groove and the radial direction is 28-32 degrees, the direction of the included angle is from the outer side of the spiral groove to the inner side of the spiral groove, the perpendicular distance (B) from the lowest end (inner side end) of the last groove of each circle to the tail end radial line of each circle is 20 mm, and the cross section shape. The invention can effectively improve the beneficiation efficiency.)

1. a spiral chute concentrating machine with a specific guide groove comprises spiral grooves, a separator, an ore feeding groove, a support, an ore cutting groove and an ore receiving hopper, and is characterized in that each spiral groove of the concentrating machine has 5 circles, grooves with different numbers are configured on the groove surface of each circle, 12 grooves are uniformly distributed in the first circle, 9 grooves are uniformly distributed in the second circle, 7 grooves are uniformly distributed in the third circle, 8 grooves are uniformly distributed in the fourth circle, and 9 grooves are uniformly distributed in the fifth circle; the shape of the groove on the surface of the spiral groove is linear, the length (A) of the groove is 1/3 of the diameter (D) of the spiral groove, the distance (C) from the end close to the center of the circle to the inner edge of the spiral groove is 1/20 of the diameter of the spiral groove, the included angle between the groove and the radial direction is 28-32 degrees, and the perpendicular distance (B) from the inner side end of the lowest end of the last groove of each circle to the tail end radial line of each circle is 20 mm.

2. a concentrator as claimed in claim 1, wherein: the cross section of each groove of the spiral groove is in a right-angled triangle shape, the length (F) of the short right-angle side is 2-3 mm, the length (E) of the long right-angle side is 5-8 mm, and the short right-angle side is in the depth direction of the groove and is upstream.

3. A concentrator as claimed in claim 1, wherein: the grooves of each circle of the spiral groove are uniformly distributed by taking the axis of the spiral groove as the center for 360 degrees.

4. A concentrator as claimed in claim 1, wherein: the concentrator can be provided with 1-4 spiral grooves according to requirements.

Technical Field

the invention relates to the field of gravity separation equipment, in particular to a spiral chute concentrating machine with a specific guide groove.

background

The spiral chute concentrating machine is a gravity concentrating equipment, generally comprising a spiral groove, a separator, an ore feeding groove, a support, an ore cutting groove and an ore receiving bucket, wherein the spiral groove is the most key part, and the rationality of the structural design directly determines the concentrating accuracy and efficiency of the spiral chute concentrating machine. Typically, the helical groove is formed by connecting 5 turns of helical blades in sequence. The inner surface (the surface contacting with the ore pulp) of a spiral groove of a common spiral chute concentrating machine is generally smooth, which is beneficial to ensuring the stability of the flow state of an ore pulp layer flowing on the inner surface on one hand, but has the defect that the material layer in the ore pulp is lack of looseness to cause inclusion on the other hand. Therefore, in order to improve the loosening of the materials in the ore pulp flowing on the spiral groove, some baffle strips (also called as compound strips) are additionally arranged on the surface of the spiral groove, so that the ore pulp is forced to pass over the baffle strips when meeting the baffle strips, and the effect of loosening a material layer is achieved. Also grooves are cut into the surface of the spiral groove, which is expected to produce inward guiding effect on the concentrate to enhance the sorting effect. However, the two enhancement schemes have the defect of damaging the flow state of the ore pulp on the spiral groove, and particularly, the scheme of adding the barrier strips is easy to cause the loss of fine-grained heavy minerals. The scheme of increasing the grooves on the groove surface is not so serious in damage to the pulp separation flow state, but often lacks sufficient optimization design on the number, shape, groove structure size and the like of the grooves, and often damages the pulp separation flow state, moreover, the disclosed groove schemes adopt the same groove number and form from the first circle to the last circle of the spiral groove, the flow rate of the pulp on the spiral groove surface is changed, the speed is high when the pulp just enters the first circle of the spiral groove, then the speed is reduced under the action of the friction force of the spiral groove, the gravity factor gradually plays a leading role after the speed is reduced to a certain speed, the pulp flow rate is gradually increased, the same groove number and structure design are adopted in each circle, when the flow rate is low, the excessive grooves can cause more obvious damage to the pulp separation flow state, even cause the phenomenon that minerals are deposited on the spiral groove surface, therefore, the improvement of the separation effect is not obvious, even the separation efficiency is lower than that of the common spiral chute concentrating machine, so that the spiral chute concentrating machine added with the raised barrier strip or the notch groove is not popularized and applied in the industry all the time for many years.

the invention aims to design grooves with specific quantity, specific shape and specific size on the surface of a spiral groove by utilizing the latest computational fluid mechanics, computer flow state simulation and laboratory verification technology, and configure different quantities of grooves on each circle of the groove surface of the spiral groove, thereby avoiding mineral deposition, better adjusting the flowing speed of ore pulp and improving the flowing stability of the ore pulp. On the other hand, the method can improve the loosening of ore particles in an ore pulp inner material layer and the reinforced separation effect on the guidance of heavy minerals on the basis of not damaging the ore pulp separation flow state on the original spiral groove, thereby achieving the purpose of improving the separation efficiency of the spiral chute concentrating machine.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provide a spiral chute concentrating machine with a specific guide groove.

The above purpose is realized by the following scheme:

A spiral chute concentrating machine with a specific guide groove comprises a spiral groove, a mineral separator, a mineral feeding groove, a support, a mineral cutting groove and a mineral receiving hopper, and is characterized in that grooves with different numbers are arranged on each circle of groove surface of the spiral groove of the concentrating machine, 12 grooves are uniformly distributed in a first circle, 9 grooves are uniformly distributed in a second circle, 7 grooves are uniformly distributed in a third circle, 8 grooves are uniformly distributed in a fourth circle, and 9 grooves are uniformly distributed in a fifth circle; the shape of the groove on the surface of the spiral groove is linear, the length A of the groove is 1/3 of the diameter D of the spiral groove, the distance C between the end of the groove close to the center of the circle and the inner edge of the spiral groove is 1/20 of the diameter D of the spiral groove, the included angle between the groove and the radial direction is 28-32 degrees, the direction of the groove is from the outer side of the spiral groove to the inner side of the spiral groove, and the perpendicular distance B between the lowest end (inner side end) of the last groove of each circle and the tail end radial.

The cross section of each groove of the spiral groove is in a right-angled triangle shape, the length F of the short right-angle side is 2-3 mm, the length E of the long right-angle side is 5-8 mm, and the short right-angle side is in the depth direction of the groove and is the upstream surface;

the grooves of each circle of the spiral groove are uniformly distributed by taking the axis of the spiral groove as the center for 360 degrees.

The invention has the beneficial effects that: by adopting the technical scheme of the invention, the influence of the additionally arranged groove on the ore pulp separation flow state on the spiral groove surface can be avoided, the weak turbulence generated at the groove can be effectively utilized to strengthen the loosening effect of the material ore layer in the ore pulp, the guide effect of moving to the heavy product area at the inner edge of the spiral groove can be provided for the heavy minerals at the bottom of the spiral groove, and the ore dressing efficiency can be effectively improved. In addition, because each circle of the spiral groove is provided with grooves with different numbers, the circle with high flow speed is provided with grooves with large numbers, and the circle with low flow speed is provided with grooves with small numbers, the phenomenon that ore pulp materials are silted due to the fact that the flow speed of the ore pulp is too slow due to the influence of the grooves can be avoided, the stability of the flow speed of the ore pulp on the spiral groove surface can be effectively improved, and the sorting precision and efficiency can be effectively improved. Through verification of a computer simulation separation comparison test and a laboratory mineral separation comparison test, the technical scheme is an optimal scheme, and compared with a common spiral chute concentrating machine (a spiral chute concentrating machine with the diameter of 600 mm) with the same model and specification, by adopting the technical scheme, when the pyrite is separated (the content of S in the raw ore is about 14 percent), the sulfur concentrate grade is averagely higher by 2.92 percent, the sulfur concentrate recovery rate is averagely higher by 3.08 percent, the tailings grade is lower by 1.35 percent, and the separation efficiency is obviously improved.

Drawings

FIG. 1 is a schematic view of the overall structure of a spiral chute concentrator;

FIG. 2 is a structural view of a single-ended spiral groove;

FIG. 3 is a top view of the groove dimension of the groove face of the first turn 7 of the spiral groove;

FIG. 4 is a top view of the groove dimension of the groove face of the second turn 8 of the spiral groove;

FIG. 5 is a top view of the groove dimension of the groove face of the third turn 9 of the spiral groove;

FIG. 6 is a top view of the groove dimension of the groove face of the fourth turn 10 of the spiral groove;

FIG. 7 is a top view of the groove dimension of the groove face of the fifth turn 11 of the spiral groove;

FIG. 8 is a cross-sectional dimension sectional view of all grooves of the groove face of the spiral groove.

Detailed Description

a spiral chute concentrating machine with a specific guide groove comprises a separator 1-positioned at the uppermost part of the whole machine and used for buffering and distributing ore pulp; the bracket 2 supports and fixes other components; each spiral groove 4-is formed by connecting 5 circles of spiral sheets from top to bottom in sequence through a flange, a single whole machine comprises 3 spiral grooves, and the spiral grooves are fixed on a support through bolts; the feeding groove 3-is arranged at the inlet end above the first circle 7 of each spiral groove through bolt connection and is used for buffering ore pulp entering the spiral groove; the ore cutting groove 5 is fixedly connected to the tail end of the fifth ring 11 of each spiral groove through bolts and is used for respectively isolating and connecting out each sorted product; and the ore receiving hopper 6 is arranged below the ore intercepting grooves, is fixedly connected to the bracket through bolts and is used for respectively combining and discharging the products discharged from each ore intercepting groove.

The method is characterized in that: the surface of the spiral groove contacting the ore pulp is designed with grooves with specific shapes, sizes and arrangement, each groove is in a straight line shape, the length A is 200 mm, the distance C from the end close to the center of the circle to the inner edge of the spiral groove is 30 mm, the grooves and the radial direction form an included angle of 30 degrees, the direction of the grooves is from the outer side (high) of the spiral groove to the inner side (low) of the spiral groove, and the vertical distance B from the lowest end (inner side end) of the last groove of each circle to the tail end radial line of each circle is 20 mm.

The cross section of each groove is in a right-angled triangle shape, the length F of the short right-angled side is 2 mm, the length E of the long right-angled side is 5 mm, and the short side is in the depth direction of the groove and faces the flow direction of ore pulp.

The grooves with different quantities are arranged on each circle of the groove surface of the spiral groove, 12 grooves are uniformly distributed in the first circle, 9 grooves are uniformly distributed in the second circle, 7 grooves are uniformly distributed in the third circle, 8 grooves are uniformly distributed in the fourth circle, and 9 grooves are uniformly distributed in the fifth circle.

The grooves of each circle are uniformly distributed by taking the axis of the spiral groove as the center for 360 degrees;

The working process of the concentrating machine is explained by combining with figure 1, firstly, the ore pulp is fed into the separator 1, the ore pulp is uniformly distributed to the feeding groove 3 fixed at the upper end of each spiral groove 4 through a plurality of discharge ports of the separator, after being fed into the spiral grooves 4 through the feeding groove 3, the ore pulp makes spiral motion downwards along the groove surface under the action of gravity, friction force and fluid pressure, and under the action of the specific cross section shape and structure of the spiral grooves 4, the ore pulp is layered and banded according to specific gravity to form concentrate (heavy minerals), middlings, tailings (light minerals) and a slime band, and finally, the concentrate, middlings, tailings and slime are separated through the interception groove 5, are respectively discharged to the product grooves of the ore receiving hopper 6 and are respectively discharged, so that the separation of the minerals is realized. Because the grooves with specific forms and sizes are designed on the surface of the spiral groove 4 contacted with the ore pulp, on the premise of not damaging the separation flow state of the ore pulp, the loosening of material particles in the ore pulp is strengthened through the local weak turbulence formed when the ore pulp flows through the specific grooves, the inclusion phenomenon of the material particles is reduced, the separation and the separation of materials with different specific gravities are facilitated, the grooves with specific angles have a guiding effect on heavy minerals, and the enrichment of concentrate is facilitated. The design of a specific number of grooves also plays a promoting role in the stability of the flowing speed of the ore pulp on the surface of the spiral groove 4, and the fluctuation value of the original ore pulp flow speed is reduced.