CN111974541A - Deslagging process for baking-free brick - Google Patents

Abstract

The invention relates to a baking-free brick deslagging process, a hammer crusher impacts slag to medium or fine crushing; separating out metal substances from the crushed slag by using a magnetic separator; the slag enters a jigger for layering; screening out metal impurities from the lower-layer material of the jigger through a shaking table; and (3) selecting raw garbage in the material by utilizing light material flotation equipment for the upper-layer material of the jigger, and preparing the obtained material and the material separated by the table concentrator for later use in brick making. The invention adopts the slag pretreatment process combining dry separation and wet separation, and the process has important effects on energy conservation, consumption reduction and slag separation and recycling.

Description

Deslagging process for baking-free brick

Technical Field

The invention belongs to the technical field of brick making processes, and particularly relates to a slag removing process for a baking-free brick.

Background

The baking-free brick is a novel wall material which is manufactured by taking any one or more of fly ash, cinder, coal gangue, tailing slag, chemical slag or natural sand and tidal marsh mud as main raw materials without high-temperature calcination, and is widely applied to the building industry.

In the prior art, broken slag is washed by multiple programs in the process of treating the slag, the amount of waste water generated in the washing process is large, the field management is not facilitated, and the problem of field sewage transverse flow is easily caused. The old process utilizes a water filtering pool with a large area to carry out natural water filtering, and has the defects of long time, large surface structure of the water filtering pool and poor environmental sanitation.

Disclosure of Invention

The invention aims to solve the problems and provides a deslagging process for a baking-free brick, which can be used for treating slag generated in the preparation process of the baking-free brick.

In order to solve the problems, the technical scheme adopted by the invention is as follows:

a baking-free brick deslagging process is characterized by comprising the following steps:

(1) the hammer crusher impacts the slag to middle or fine crushing;

(2) separating out metal substances from the crushed slag by using a magnetic separator;

(3) the slag after crushing and magnetic separation enters a jigger, water is added into a trough of the jigger, and a jigging pulse curve of the jigger is in a sawtooth waveform, so that the rising water flow is faster than the falling water flow, the rising time of the water flow is short, and the falling time is long;

(4) upper materials are separated in layers through a jigger, and the upper materials are mixed with water and flow into a light material flotation machine to float out raw garbage;

(5) washing the floated material with water by a sand washer, dewatering by a dewatering screen, and conveying the material to a stacking area by a conveying belt for making bricks for later use;

(6) and (4) screening metal impurities from the lower-layer materials discharged from the jigger through a shaking table, and preparing bricks from the materials with the metal impurities screened out.

Further, the brick making standby material is dehydrated.

The invention has the beneficial effects that:

(1) the invention adopts the slag pretreatment process combining dry separation and wet separation, and the process has important effects on energy conservation, consumption reduction and slag separation and recycling.

(2) Repeated crushing of the slag is reduced, dust is reduced, and energy conservation and environmental protection are facilitated; the obtained slag has low water content and less raw materials, and the slag is beneficial to comprehensive utilization.

Detailed Description

The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more readily understand the advantages and features of the present invention and to clearly and unequivocally define the scope of the present invention.

A deslagging process of a baking-free brick is carried out according to the following steps:

(1) the hammer crusher impacts the slag at a high speed until the slag is crushed or finely crushed;

(2) separating out metal substances from the crushed slag by using a magnetic separator;

(3) the slag after crushing and magnetic separation enters a jigger, water is added into a trough of the jigger, and a jigging pulse curve of the jigger is in a sawtooth waveform, so that the rising water flow is faster than the falling water flow, the rising time of the water flow is short, and the falling time is long;

(4) upper materials are separated in layers through a jigger, and the upper materials are mixed with water and flow into a light material flotation machine to float out raw garbage;

(5) washing the floated material with water by a sand washer, dewatering the material by a dewatering screen, and conveying the dewatered material to a stacking area by a conveyor belt for making bricks for later use;

(6) and (4) screening metal impurities from the lower-layer materials discharged from the jigger through a shaking table, and preparing bricks from the materials with the metal impurities screened out.

The specific functions of the apparatus according to the steps of the present embodiment were analyzed:

1. the hammer head type crusher is adopted, and the hammer head type crusher adopted in the embodiment is purchased from national peak machinery factories and is 800 in model number. The basic working principle is to use the high-speed impact action of the hammer head to carry out medium crushing and fine crushing on the materials. The equipment mainly has the following functions:

(1) the slag is crushed fully without destroying the size of the raw materials of the garbage. The garbage raw materials are more easily sorted out, then grading treatment is carried out, then the large slag is crushed and graded again, the large iron and the raw materials are sorted out by a grader, and then the iron and the raw materials are separated by a magnetic separator;

(2) small volume, simple structure, large crushing ratio, low energy consumption, large production capacity, uniform product granularity and selective crushing function.

2. Adopting a magnetic separator, wherein the type of the magnetic separator is as follows: one is a suspended magnetic separator and the other is a wet magnetic separator.

(1) The suspension type magnetic separator has the following working principle and characteristics: the suspended magnetic separator used in the present embodiment is purchased from Shandong Hengri, and its model is RCYC 8T. An electromagnet is suspended above the garbage conveying belt at a certain height from the sorted materials. When the garbage passes under the garbage fixing magnet, the magnetic substance is adsorbed on the conveyor belt and moves along with the conveyor belt. When the magnetic substance is sent to the small magnetic area, the magnetic substance automatically falls off, thereby realizing the recovery of the ferromagnetic substance. The equipment has the advantages of relatively low noise, no pollution and simple operation, and meets the environmental protection requirement of garbage disposal.

(2) The wet magnetic separator has the following working principle and characteristics: the wet magnetic separator used in this example was purchased from Shandong Hengri and is of the type CTS-50/120. The wet magnetic separator is made of high-quality iron oxide material or is compounded with rare earth magnetic steel, and the average magnetic induction intensity on the cylinder surface is 100-600 mt. The wet magnetic separator can finely crush the slag to be less than 5mm or 3mm, and then the wet magnetic separator carries out magnetic separation and tailing discarding by using a permanent magnetic medium field strong magnetic separator. The process has important effects on energy conservation, consumption reduction and slag separation and recycling.

3. Treating with jigger and shaking table

And feeding the slag after crushing and magnetic separation into a jigger and a shaking table.

(1) The jigger is a fixed sieve type, is purchased from Guangxi Guiyin Xin mineral processing machinery factory, and has the model number of JT 4-2. The main working principle is that according to the theoretical layering rule of a jigging bed, the energy-saving gravity separation equipment is developed and improved on the basis of the traditional jigging machine, and the jigging pulsation curve of the equipment is in a sawtooth waveform, so that the ascending water flow is faster than the descending water flow; the method has the advantages of short rising time and long falling time, overcomes the defects of rising and falling water flow and same action time generated by the sine wave pulsation curve jigger, enhances the looseness of a bed layer, relieves the suction effect, and ensures that heavy mineral grains in minerals are fully settled, thereby achieving the ideal recovery rate.

(2) The shaking table is a reselection mineral processing device widely applied, and is purchased from Guangxi Guiyin Xin mineral processing mechanical factory, and the type number of the shaking table is 6-S hyperbolic wave shaking bed. The sorting process is that the horizontal inclined bed surface is covered with the washing water fed from the water feeding tank of the shaking table, and a uniform inclined thin-layer water flow is formed. When the material flows onto the bed surface from the ore feeding groove, the ore particles are loosened and layered in the bed strip or the notch groove under the action of water flow flushing and bed surface vibration. The upper layer of light mineral particles are impacted greatly, and most of the light mineral particles move downwards along the transverse direction of the bed surface to form tailings, and the side is called a tailing side. While the heavy mineral particles at the bottom of the bed layer move longitudinally by the differential motion of the bed surface and are discharged from the opposite side of the transmission end to be called concentrate, namely the concentrate end. The granules with different densities are subjected to different transverse and longitudinal actions on the bed surface, the final movement direction is different, the bed surface is unfolded in a fan shape, and various products with different qualities can be obtained.

The jigger and the shaking table are applied to the separation of the slag, and the fine nonferrous metals and the slag are separated by wet separation by using water by using the same working principle.

The process has the advantages that: through multiple grading, the amount of slag which needs to be sorted by a wet method can be reduced to the maximum extent, the water consumption for production is reduced, water is controlled more easily, and the wet, messy and dirty production field is avoided; repeated crushing of the slag is reduced, dust is reduced, and energy conservation and environmental protection are facilitated; the obtained slag has low water content and less raw materials, and the slag is more beneficial to comprehensive utilization.

Novel process for flotation of slag light substances

The furnace slag still contains a large amount of light substances after crushing, magnetic separation and gravity separation, and the old process cannot separate and remove the light substances, so that the raw materials of the baking-free brick are more in impurities, and the quality of the furnace slag finished brick is influenced. A process for floating the light substance in slags includes such steps as jigging, gravity separation, pouring water into slag stirrer (800 type), taking out the slag from iron bath, and floating the light substance from iron bath to dewatering roller sieve for separating water from light substance. The process can reduce the light matter content of the separated slag by over 90 percent, and greatly improves the quality of the slag.

Dehydration process after wet separation treatment of furnace slag

The slag is crushed, magnetically separated and gravity separated in water, and the slag is soaked in water to obtain slag in required size. The slag-water separator of the embodiment is a dewatering screen which is purchased from Sichuan Litian and is of the type LTS 2460.

Slag separation wastewater treatment process

The waste water separated from the slag production by adopting a plate-and-frame filter press is subjected to pipeline treatment in time through the filter press, the squeezed mud cakes can be immediately used for manufacturing baking-free bricks, most importantly, after the new process is applied, the water consumption is reduced by half, the water quality is improved, the condition of sewage cross flow in the past is changed, and the quality of the separated slag is greatly improved.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, that the preferred embodiments of the present invention are described above and the present invention is not limited to the preferred embodiments, and that various changes and modifications may be made without departing from the spirit and scope of the present invention and these changes and modifications are within the scope of the invention as claimed.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (2)

1. A baking-free brick deslagging process is characterized by comprising the following steps:

the hammer crusher impacts the slag to middle or fine crushing;

separating out metal substances from the crushed slag by using a magnetic separator;

the slag after crushing and magnetic separation enters a jigger, water is added into a trough of the jigger, and a jigging pulse curve of the jigger is in a sawtooth waveform, so that the rising water flow is faster than the falling water flow, the rising time of the water flow is short, and the falling time is long;

upper materials are separated in layers through the jigger, the upper materials flow into the light material suspension machine, and raw garbage in the materials is separated by utilizing the buoyancy of water;

(5) washing the upper materials by a sand washer, dewatering by a dewatering screen, and conveying the materials to a stacking area by a conveying belt for making bricks for later use;

(6) and (4) screening metal impurities from the lower-layer materials discharged from the jigger through a shaking table, and preparing bricks from the materials with the metal impurities screened out.

2. The process of claim 1, wherein the brick-making stock is dehydrated.