CN116618169A - A kind of ball mill slag water recycling method - Google Patents

Abstract

The invention discloses a method for recycling ball mill slag slurry water. The method comprises: firstly setting a washing ball mill to grind and wash steel slag to obtain ball mill steel slag water; then, using a drum sieve to screen the ball mill steel slag water to obtain soybean steel, Slag water; then, set up a magnetic separator and a spiral classifier to separate the slurry water to obtain iron concentrate powder and tailings, and the rest of the liquid flows into the sedimentation tank for sedimentation; finally, use a slurry pump to remove the sludge at the bottom of the sedimentation tank The slurry is transported to the plate and frame press for extrusion to obtain tailings and extrusion water. The extrusion water and the overflow water overflowing from the top of the sedimentation tank are transported to the sedimentation tank, and then the water in the sedimentation tank is transported by a liquid pump Go to the water-washing ball mill to carry out the water-washing ball milling process. The ball mill slag slurry water recycling method of the present invention belongs to the technical field of steel slag treatment, solves the problems of serious waste of water resources and water pollution in the production process of water washing ball mills, solves the problem of difficult treatment of mud at the bottom of sedimentation tanks, and effectively improves Ball mill slurry water recycling rate, reduce waste.

Description

A water recycling method for ball mill slag slurry

technical field

The invention relates to steel slag treatment technology, more specifically, it relates to a ball mill slag slurry water recycling method.

Background technique

At present, the slag slurry treatment of the iron and steel waste slag ball mill water washing mineral processing process usually adopts the classification and natural sedimentation method of the sedimentation tank. For example, the patent No. CN2666529Y discloses a slag slurry treatment device for iron and steel waste slag ball mill water washing ore dressing process, which can process tailing slag liquid, but when the steel slag ball abrasive is sorted, it needs to use a large amount of water. In the sorting treatment of steel slag ball abrasive, it plays the role of washing, dilution and flow. Provides a guarantee for smooth transportation among various equipment such as pumps. During the processing of the existing equipment, the slurry water produced is heavy in mud and cannot be recycled directly. The method of natural sedimentation in multi-stage sedimentation tanks is adopted, which takes up a large area, and it is very difficult to treat the mud that sinks to the bottom of the tank. , pollute the factory environment. On the other hand, if the slurry water cannot be effectively treated, first, it will cause a large amount of waste of water resources, which is not in line with the original intention of energy conservation and environmental protection; second, direct discharge will cause water pollution.

Contents of the invention

The technical problem to be solved by the present invention is aimed at the above-mentioned deficiencies of the prior art, and the purpose of the present invention is to provide a method for recycling ball mill slag water.

In order to achieve the above object, the present invention provides a method for recycling ball mill slag slurry water, the method comprising: first setting a water-washing ball mill to perform a grinding and washing process on steel slag to obtain ball mill steel slag water; then, using a drum screen to screen the ball mill steel slag water , to obtain soybean steel and slag water; then, set up a magnetic separator and a spiral classifier to sort the slag water to obtain iron concentrate powder and tailings, and the rest of the liquid flows into the sedimentation tank for precipitation; finally, use the slurry pump The slurry at the bottom of the sedimentation tank is sent to the plate and frame press for extrusion to obtain tailings and extrusion water. The extrusion water and the overflow water overflowing from the top of the sedimentation tank are sent to the sedimentation tank, and then the sedimentation is carried out by a liquid pump. The water in the pool is transported to the water-washing ball mill for the water-washing ball milling process.

Further, when performing the grinding and washing process, add water to the washing ball mill to rinse and dilute the ball abrasive, and the water washing ball mill balls the steel slag water, and the liquid from the washing ball mill first passes through the drum sieve, and the soybean steel and slag in the ball mill are sorted out. water.

Further, the spiral classifier includes a 1# spiral classifier and a 2# spiral classifier, and the magnetic separator performs magnetic separation on the slurry water to obtain an upper magnetic mixture and a non-magnetic mixture, and the upper magnetic mixture is classified by a 1# spiral The machine sorts out the fine iron powder in the ball abrasive, and the non-magnetic mixture passes through the 2# spiral classifier to sort out the tail sand in the ball abrasive.

Furthermore, the settling tank is a sloping plate settling tank, and the liquid output by the 1# spiral classifier and the 2# spiral classifier is transported to the sloping plate settling tank for precipitation, and the overflow water filtered by the sloping plate settling tank directly enters the settling tank , the bottom slurry is transported to the plate and frame press through the slurry pump.

Furthermore, the plate and frame press sorts out the tailings in the slurry, and the remaining squeezed water enters the sedimentation tank together with the overflow water of the inclined plate sedimentation tank for natural sedimentation;

Furthermore, a filter interlayer is set in the settling tank, and the liquid pump is installed at the filter interlayer, and the filtered water is directly supplied to the water-washing ball mill, so as to realize recycling of ball mill slurry water.

Beneficial effect

Compared with the prior art, the beneficial effects of the method for recycling ball mill slag water of the present invention are as follows:

The ball mill slag slurry water recycling method of the present invention solves the problems of serious waste of water resources and water pollution in the production process of water-washed ball mills; solves the problems of difficult treatment of mud at the bottom of the sedimentation tank and pollutes the environment of the factory area; and effectively improves the efficiency of the ball mill. The recycling rate of slurry water reduces waste; the labor intensity of mud cleaning in sedimentation tanks is reduced, and the production environment is improved; water pollution is avoided.

Description of drawings

Fig. 1 is a structural block diagram of the water recycling method for ball mill slag slurry of the present invention.

In the figure: 1. Washing ball mill; 2. Trommel screen; 3. Magnetic separator; 4. Sedimentation tank; 5. Slurry pump; 6. Plate and frame press; 7. Sedimentation tank; 8. 1# Spiral classifier; 9. 2# spiral classifier; 10. Liquid pump.

Detailed ways

The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

The specific embodiment of the present invention is as follows: as shown in Figure 1, a method for recycling ball mill slag water, the method includes: firstly, a water-washing ball mill 1 is set to perform a grinding and washing process on steel slag to obtain ball mill steel slag water; then, use a drum Sieve 2 screens the ball mill steel slag water to obtain soybean steel and slag water; then, set up magnetic separator 3 and spiral classifier to separate the slag water to obtain iron concentrate powder and tailings, and the rest of the liquid flows into the sedimentation The tank 4 is sedimented; finally, the slurry pump 5 is used to transport the slurry at the bottom of the sedimentation tank 4 to the plate and frame press 6 for extrusion to obtain tailings and extrusion water, and the extrusion water and thus the overflow of the top of the sedimentation tank 4 The overflow water coming out is transported to the settling tank 7, and then the water in the settling tank 7 is transported to the water-washing ball mill 1 by the liquid pump 10 to carry out the water-washing ball milling process.

In this ball mill slag slurry water recycling method, the steel slag is ground, washed and screened by setting a water-washing ball mill 1, a drum screen 2, a magnetic separator 3, and a spiral classifier. Slurry extrusion, recovering the water used for washing in the washing ball mill 1, and then repeatedly conveying to the washing ball mill 1 for washing, which solves the problem that the existing slag water cannot be directly recycled and recycled due to the heavy mud content, which leads to the loss of water resources. Severe waste and very difficult mud treatment, polluting the plant environment; the technical solution in the present invention also solves the problems of serious waste of water resources and water pollution in the production process of the water-washing ball mill; solves the difficulty of mud treatment at the bottom of the sedimentation tank, The problem of polluting the environment of the plant area; and effectively improving the water recycling rate of the ball mill slag slurry, reducing waste; reducing the labor intensity of mud cleaning in the sedimentation tank, improving the production environment; avoiding water pollution.

In this embodiment, during the grinding and washing process, water is added to the water-washing ball mill 1 to rinse and dilute the ball abrasive, and the water-washing ball mill 1 grinds steel slag water, and the liquid from the water-washing ball mill 1 first passes through the trommel 2, and the trommel 2 is a common The drum screening machine is used to separate the soybean steel and slag water in the ball abrasive.

In this embodiment, the spiral classifier includes 1# spiral classifier 8 and 2# spiral classifier 9, and the magnetic separator 3 magnetically separates the slurry water to obtain the upper magnetic mixture and the non-magnetic mixture, and the upper magnetic mixture passes through 1 #Spiral classifier 8 sorts out the fine iron powder in the ball abrasive, and the non-magnetic mixture passes through the 2# spiral classifier to sort out the tail sand in the ball abrasive.

In this embodiment, the settling tank 4 is a sloping plate settling tank, and the liquid output from the 1# spiral classifier 8 and 2# spiral classifier is transported to the sloping plate settling tank for precipitation, and the overflow water filtered by the sloping plate settling tank directly enters the Settling tank 7, the bottom slurry is transported to the plate and frame press 6 through the slurry pump 5.

In this embodiment, the plate and frame press 6 sorts out the tailings in the slurry, and the remaining squeezed water enters the sedimentation tank 7 together with the overflow water of the inclined plate sedimentation tank for natural sedimentation;

In this embodiment, a filter interlayer is set in the settling tank 7, and the liquid pump 10 is installed at the filter interlayer, and the filtered water is directly provided to the water washing ball mill 1 to realize recycling of ball mill slurry water; The slurry water passes through the multi-layer filtration of the spiral classifier, the inclined plate sedimentation tank and the plate and frame press 6, and the slurry water reaching the sedimentation tank 7 basically does not contain sediment, so the sedimentation tank 7 does not need to be cleaned frequently, which reduces the impact on the sedimentation tank. 7. The labor intensity of mud cleaning is improved, which improves the production environment.

The above are only preferred embodiments of the present invention, and it should be pointed out that for those skilled in the art, some deformations and improvements can be made without departing from the structure of the present invention, and these will not affect the effect and implementation of the present invention. Utility of patents.

Claims (6)

1. The ball mill slurry water recycling method is characterized by comprising the following steps: firstly, arranging a water-washing ball mill (1) to carry out a grinding and washing process on steel slag to obtain ball-milling steel slag water; then, screening the ball-milling steel slag water by using a rotary screen (2) to obtain bean steel and slag slurry water; then, a magnetic separator (3) and a spiral classifier are arranged to separate the slag slurry water to obtain iron concentrate powder and tailings, and the rest liquid flows into a sedimentation tank (4) to be sedimentated; and finally, conveying the slurry at the bottom of the sedimentation tank (4) to a plate frame press (6) for extrusion by using a slurry pump (5) to obtain tail mud and extrusion water, conveying the extrusion water and overflow water overflowed from the top of the sedimentation tank (4) to a sedimentation tank (7), and conveying the water in the sedimentation tank (7) to a washing ball mill (1) through a liquid pump (10) for washing ball milling.

2. The recycling method of ball mill slag slurry water according to claim 1, wherein during the grinding and washing process, water is added into the water-washed ball mill (1) to wash and dilute ball grinding materials, the water-washed ball mill (1) is used for ball milling of steel slag water, and liquid from the water-washed ball mill (1) firstly passes through a rotary screen (2) to separate out bean steel and slag slurry water in the ball grinding materials.

3. The ball milling slurry water recycling method according to claim 1 or 2, wherein the spiral classifier comprises a No. 1 spiral classifier (8) and a No. 2 spiral classifier (9), the magnetic separator (3) magnetically separates slurry water to obtain a top magnetic mixture and a non-top magnetic mixture, the top magnetic mixture is separated into fine iron powder in the ball grinding material through the No. 1 spiral classifier (8), and the non-top magnetic mixture is separated into tail sand in the ball grinding material through the No. 2 spiral classifier.

4. The ball mill slurry water recycling method according to claim 3, wherein the sedimentation tank (4) is an inclined plate sedimentation tank, the liquid output by the No. 1 spiral classifier (8) and the No. 2 spiral classifier is conveyed to the inclined plate sedimentation tank for sedimentation, overflow water filtered by the inclined plate sedimentation tank directly enters the sedimentation tank (7), and bottom slurry is conveyed to the plate frame press (6) through the slurry pump (5).

5. The recycling method of ball mill slurry water according to claim 4, wherein the plate frame press (6) sorts tail mud in the slurry, and the remaining extrusion water and overflow water of the inclined plate sedimentation tank enter the sedimentation tank (7) together for natural sedimentation.

6. The ball mill residue slurry water recycling method according to claim 5, wherein a filtering interlayer is arranged in the sedimentation tank (7), the liquid pump (10) is arranged at the filtering interlayer, and the filtered water is directly supplied to the water washing ball mill (1) to realize the recycling of the ball mill residue slurry water.