CN109759419B - Dry type automatic separation method for furnace slag - Google Patents

Dry type automatic separation method for furnace slag Download PDF

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Publication number
CN109759419B
CN109759419B CN201811607121.7A CN201811607121A CN109759419B CN 109759419 B CN109759419 B CN 109759419B CN 201811607121 A CN201811607121 A CN 201811607121A CN 109759419 B CN109759419 B CN 109759419B
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materials
slag
substances
screen
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CN109759419A (en
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胡益宝
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Jiangsu Toa Environmental Technology Co ltd
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Jiangsu Toa Environmental Technology Co ltd
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Abstract

The invention relates to a dry type automatic separation method of furnace slag, belonging to the technical field of furnace slag recycling. The dry-type automatic slag sorting method can be used for fully screening returned materials and sand materials in the slag through a bouncing screen and a star-disk screen aiming at the current domestic slag with relatively complex components; screening out iron and nonferrous metals in the slag by using an eddy current separator and a magnetic separator; all the screened materials are reusable materials, so that the waste of resources is avoided, and the operation cost of enterprises is saved. The dry type automatic separation method for the furnace slag can be used for separating the furnace slag, and can efficiently screen the following materials in the furnace slag: returning substances which are not fully burnt to the furnace for burning again; the nonferrous metal is purified and sold on the surface; the sintered blocks and the sand and stone materials can be used for paving and making the rotor, and the magnetic substances are mainly iron and can be directly sold; in a word, the dry-type automatic slag sorting method is simple and reasonable in process design, easy to operate and suitable for popularization and use.

Description

Dry type automatic separation method for furnace slag
Technical Field
The invention relates to a dry type automatic separation method of furnace slag, belonging to the technical field of furnace slag recycling.
Background
At present, 20% -30% of slag is generated after household garbage in a landfill is incinerated, and the slag often contains some metal elements (iron, aluminum, magnesium, potassium, sodium, strontium, titanium, manganese, zinc and the like) and has a certain resource recycling value; in addition, the slag, which contains silica (about 75.5%), calcium oxide and calcium carbonate (about 10.3%), is a common solid waste, and is crushed into fine silt to be used for producing building materials. 2. The main means for treating the slag of the power plant in China at present are heaping, landfill washing and sorting and the like; the method of stacking, burying and the like is adopted, the unburned and sufficient combustible materials in the slag pollute the environment, the sand and stone materials and metals can not be recycled, the environment is polluted, and the resource waste is caused. The traditional washing method can sort and clean the slag surface, but also relates to new water to be treated, and the method has a series of problems of high cost, large occupied area and the like.
In order to solve the technical problems, the invention designs a dry-type automatic separation method for the furnace slag, which can fully screen the returned materials and the sand stones in the furnace slag through a bounce screen and a star-disk screen aiming at the furnace slag with more complex components in China at present; screening out iron and nonferrous metals in the slag by using an eddy current separator and a magnetic separator; all the screened materials are reusable materials, so that the waste of resources is avoided, and the operation cost of enterprises is saved. The dry type automatic separation method for the furnace slag can be used for separating the furnace slag, and can efficiently screen the following materials in the furnace slag: returning substances which are not fully burnt to the furnace for burning again; the nonferrous metal is purified and sold on the surface; the sintered blocks and the sand and stone materials can be used for paving and making the rotor, and the magnetic substances are mainly iron and can be directly sold; in a word, the dry-type automatic slag sorting method is simple and reasonable in process design, easy to operate and suitable for popularization and use.
Disclosure of Invention
In order to overcome the defects in the background art, the technical scheme adopted by the invention for solving the technical problems is as follows: a dry type automatic separation method for furnace slag is characterized by comprising the following steps:
(1) feeding the slag to a plate chain machine through a loader, and then feeding the slag to a first magnetic separator through a belt conveyor, wherein the first magnetic separator performs primary separation on magnetic substances in the slag to separate iron-containing substances;
(2) after the slag primarily selected in the step (1) passes through a crusher, the slag enters a second magnetic separator, and the magnetic separator screens magnetic substances in the slag again to further separate iron-containing substances;
(3) and the material coming out of the second magnetic separator enters the bounce screen, and the material is screened by the bounce screen to obtain three materials: material I, 2D oversize material of 50-200 mm; material II, 3D oversize material of 50-200 mm; material III, 0-50 mm undersize; wherein the material tee bend gets into the astrolabe sieve through the hopper, and the astrolabe sieve is selected separately three kinds of material through the function of supplementary selection by winnowing with material three: material IV, 0-3 mm screen underflow; five materials and 3-50 mm light materials; six materials and 3-50 mm heavy materials;
(4) then forming sandy soil as a material for making and transferring under a sieve with four 0-3 mm of the material; light substances of five 3-50 mm materials and 2D oversize substances of 50-200 mm materials are gathered to a packing machine for packing and sent to a power plant for remelting incineration;
(5) meanwhile, collecting heavy materials with the weight of six 3-50 mm and 3D oversize materials with the weight of two 50-200 mm to a building crusher through a transfer belt conveyor to crush the materials to primary materials with the weight of 0-30 mm;
(6) then, feeding the primary material into a circular vibrating screen to carry out fine screening on the primary material to obtain oversize products larger than 30 mm, primary undersize products of 10-30 mm and secondary undersize products of 0-10 mm; wherein oversize materials larger than 30 mm enter the building crusher again for crushing in a material returning mode; wherein, the first-grade screen underflow of 10-30 mm passes through a vortex separator to recover nonferrous metals and form a crushed stone for paving; wherein the 0-10 mm secondary undersize is processed by a vortex separator to recover nonferrous metals to form a rotary raw material.
Preferably, the loading height of the loader in the step (1) is less than 3.1 meters.
The invention designs a dry-type automatic separation method for furnace slag, which can fully screen returned materials and sand materials in the furnace slag through a bounce screen and a star-disk screen aiming at the furnace slag with relatively complex components in China at present; screening out iron and nonferrous metals in the slag by using an eddy current separator and a magnetic separator; all the screened materials are reusable materials, so that the waste of resources is avoided, and the operation cost of enterprises is saved. The dry type automatic separation method for the furnace slag can be used for separating the furnace slag, and can efficiently screen the following materials in the furnace slag: returning substances which are not fully burnt to the furnace for burning again; the nonferrous metal is purified and sold on the surface; the sintered blocks and the sand and stone materials can be used for paving and making the rotor, and the magnetic substances are mainly iron and can be directly sold; in a word, the dry-type automatic slag sorting method is simple and reasonable in process design, easy to operate and suitable for popularization and use.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a process flow diagram of a dry automatic slag separation method of the present invention.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
In a first embodiment, referring to fig. 1, a dry type automatic slag sorting method is characterized by comprising the following steps:
(1) feeding the slag to a plate chain machine through a loader, and then feeding the slag to a first magnetic separator through a belt conveyor, wherein the first magnetic separator performs primary separation on magnetic substances in the slag to separate iron-containing substances;
(2) after the slag primarily selected in the step (1) passes through a crusher, the slag enters a second magnetic separator, and the magnetic separator screens magnetic substances in the slag again to further separate iron-containing substances;
(3) and the material coming out of the second magnetic separator enters the bounce screen, and the material is screened by the bounce screen to obtain three materials: material I, 2D oversize material of 50-200 mm; material II, 3D oversize material of 50-200 mm; material III, 0-50 mm undersize; wherein the material tee bend gets into the astrolabe sieve through the hopper, and the astrolabe sieve is selected separately three kinds of material through the function of supplementary selection by winnowing with material three: material IV, 0-3 mm screen underflow; five materials and 3-50 mm light materials; six materials and 3-50 mm heavy materials;
(4) then forming sandy soil as a material for making and transferring under a sieve with four 0-3 mm of the material; light substances of five 3-50 mm materials and 2D oversize substances of 50-200 mm materials are gathered to a packing machine for packing and sent to a power plant for remelting incineration;
(5) meanwhile, collecting heavy materials with the weight of six 3-50 mm and 3D oversize materials with the weight of two 50-200 mm to a building crusher through a transfer belt conveyor to crush the materials to primary materials with the weight of 0-30 mm;
(6) then, feeding the primary material into a circular vibrating screen to carry out fine screening on the primary material to obtain oversize products larger than 30 mm, primary undersize products of 10-30 mm and secondary undersize products of 0-10 mm; wherein oversize materials larger than 30 mm enter the building crusher again for crushing in a material returning mode; wherein, the first-grade screen underflow of 10-30 mm passes through a vortex separator to recover nonferrous metals and form a crushed stone for paving; wherein the 0-10 mm secondary undersize is processed by a vortex separator to recover nonferrous metals to form a rotary raw material.
And (2) the loading height of the loader in the step (1) is below 3.1 meters.
The invention designs a dry-type automatic separation method for furnace slag, which can fully screen returned materials and sand materials in the furnace slag through a bounce screen and a star-disk screen aiming at the furnace slag with relatively complex components in China at present; screening out iron and nonferrous metals in the slag by using an eddy current separator and a magnetic separator; all the screened materials are reusable materials, so that the waste of resources is avoided, and the operation cost of enterprises is saved. The dry type automatic separation method for the furnace slag can be used for separating the furnace slag, and can efficiently screen the following materials in the furnace slag: returning substances which are not fully burnt to the furnace for burning again; the nonferrous metal is purified and sold on the surface; the sintered blocks and the sand and stone materials can be used for paving and making the rotor, and the magnetic substances are mainly iron and can be directly sold; in a word, the dry-type automatic slag sorting method is simple and reasonable in process design, easy to operate and suitable for popularization and use.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (2)

1. A dry type automatic separation method for furnace slag is characterized by comprising the following steps:
(1) feeding the slag to a plate chain machine through a loader, and then feeding the slag to a first magnetic separator through a belt conveyor, wherein the first magnetic separator performs primary separation on magnetic substances in the slag to separate iron-containing substances;
(2) after the slag primarily selected in the step (1) passes through a crusher, the slag enters a second magnetic separator, and the magnetic separator screens magnetic substances in the slag again to further separate iron-containing substances;
(3) and the material coming out of the second magnetic separator enters the bounce screen, and the material is screened by the bounce screen to obtain three materials: material I, 2D oversize material of 50-200 mm; material II, 3D oversize material of 50-200 mm; material III, 0-50 mm undersize; wherein the material tee bend gets into the astrolabe sieve through the hopper, and the astrolabe sieve is selected separately three kinds of material through the function of supplementary selection by winnowing with material three: material IV, 0-3 mm screen underflow; five materials and 3-50 mm light materials; six materials and 3-50 mm heavy materials;
(4) then sand is formed under the sieve with the size of four 0-3 mm as a brick making raw material; light substances of five 3-50 mm materials and 2D oversize substances of 50-200 mm materials are gathered to a packing machine for packing and sent to a power plant for remelting incineration;
(5) meanwhile, collecting heavy materials with the weight of six 3-50 mm and 3D oversize materials with the weight of two 50-200 mm to a building crusher through a transfer belt conveyor to crush the materials to primary materials with the weight of 0-30 mm;
(6) then, feeding the primary material into a circular vibrating screen to carry out fine screening on the primary material to obtain oversize products larger than 30 mm, primary undersize products of 10-30 mm and secondary undersize products of 0-10 mm; wherein oversize materials larger than 30 mm enter the building crusher again for crushing in a material returning mode; wherein, the first-grade screen underflow of 10-30 mm passes through a vortex separator to recover nonferrous metals and form a crushed stone for paving; wherein the 0-10 mm secondary screen underflow is subjected to the recovery of nonferrous metals by an eddy current separator to form a brick making raw material.
2. The dry automatic slag separation method according to claim 1, wherein the loading height of the loader in the step (1) is less than 3.1 m.
CN201811607121.7A 2018-12-27 2018-12-27 Dry type automatic separation method for furnace slag Active CN109759419B (en)

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CN112845536A (en) * 2021-01-29 2021-05-28 广东中翔环保建材有限公司 Dry-method resource utilization system for household garbage incineration power generation slag
CN113560323A (en) * 2021-08-04 2021-10-29 中野环保科技(重庆)股份有限公司 Pretreatment method and device for incineration residue of social source dangerous waste

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