CN217432584U

CN217432584U - Mineral admixture preparation system

Info

Publication number: CN217432584U
Application number: CN202221128653.4U
Authority: CN
Inventors: 柴娜; 欧阳思蜜; 李玲妮; 胡明; 樊俊迪; 潘文峰; 雷登科
Original assignee: China University of Mining and Technology CUMT
Current assignee: China University of Mining and Technology CUMT
Priority date: 2022-05-11
Filing date: 2022-05-11
Publication date: 2022-09-16
Anticipated expiration: 2032-05-11

Abstract

The utility model discloses a mineral admixture preparation system relates to solid waste reproduction technical field. The system comprises a drying system, a crushing-screening system, an integrated tailing grinding-activating system and a cyclone dust removal collecting system; the integrated tailing grinding-activating system comprises a grinding machine, an activating agent container for storing an activating agent and a dosing metering device; the dosing metering device is connected to the inlet of the mill, and the activating agent in the activating agent container enters the mill through the dosing metering device. The utility model connects the dosing metering device with the inlet of the mill, the activator in the activator container directly enters the mill through the dosing metering device, and the activation is carried out while the grinding is carried out, so that the mineral admixture with higher activity and more proper granularity can be obtained; meanwhile, the production process is simpler and more efficient, the production equipment is more compact in structure, reasonable in design, high in automation degree and convenient to operate, and a large amount of manpower and material resources are saved.

Description

Mineral admixture preparation system

Technical Field

The utility model relates to a solid waste reproduction technical field, concretely relates to mineral admixture preparation system.

Background

The tailings are dangerous solid wastes with the highest output and accumulation in industrial solid wastes in China, and the accumulation of the tailings in China reaches 222.6 hundred million tons at the end of 2020. The most direct treatment mode adopted by the tailings in China at present is a tailings pond treatment method, namely directly discharging the tailings into a tailings pond for stacking. The accumulation of the tailings not only wastes a large amount of land resources, but also brings huge potential safety hazards to surrounding residents, and causes adverse effects on the ecological environment and social stability. On one hand, the country has already gone out relevant policies, most areas are not allowed to build new tailings ponds, and the original tailings ponds which are laid for a long time are also consumed; on the other hand, the country proposes to collect environmental protection tax on solid waste discharge from 2018, and 15-membered ring tax is required to be paid for each ton of tailings, which means that enterprises spend more funds for treating and disposing the tailings solid waste formed in the production process. Therefore, the zero emission of the tailings is imperative no matter from social benefit or economic benefit.

The resource utilization of tailings is an important way for solving the problem of tailings disposal, and particularly, how to reasonably and effectively dispose the tailings solid waste under the current 'double-carbon' background is related to the high-quality development of the mine industry. Research shows that after the tailings are crushed and screened, the components of the tailings are similar to those of cement, and the tailings are used as raw materials for preparing the green building material-mineral admixture, but how to improve the activity of the metal tailings is the key for realizing the conversion from the solid waste-metal tailings to the green building material-mineral admixture.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model discloses a mineral admixture preparation system to solve the problem that solid waste such as a large amount of metal tailings is difficult to utilize.

According to the purpose of the utility model, the mineral admixture preparation system comprises a drying system for drying tailing materials, a crushing-screening system for crushing and screening the dried materials, an integrated tailing grinding-activating system for grinding and activating tailings and a cyclone dust collection system for collecting the mineral admixture reaching the standard; the drying system comprises a dryer for drying the tailings and a fluidized bed furnace for supplying heat to the dryer; the integrated tailing grinding-activating system comprises a grinder for grinding tailings, an activating agent container for storing activating agents and a dosing metering device; the dosing metering device is connected to the inlet of the mill, and the activating agent in the activating agent container enters the mill through the dosing metering device; the cyclone dust collection system comprises a cyclone collector and a dust remover.

Preferably, the system also comprises an airflow separator for separating the ground and activated materials, wherein the airflow separator is arranged at the discharge port of the mill and is also provided with a fine sand outlet, and the fine sand outlet is connected with the feed port of the mill.

Preferably, the mill is a vertical mill, and comprises a feeding pipe, a grinding disc and a separator, wherein the feeding pipe is an inlet of the mill, and an outlet of the dosing metering device is connected with the feeding pipe.

Preferably, the activating agent used in the integrated tailing grinding-activating system is an organic or inorganic activating agent.

Preferably, the mass ratio of the activating agent to the drying material is 2:1000-5: 1000.

Compared with the prior art, the utility model discloses a mineral admixture preparation system's advantage is:

(1) the utility model discloses to add medicine metering device and mill entry phase and be connected, the tailing in the activator container and the steady feed bin of material gets into the mill simultaneously through adding medicine metering device and material metering device respectively, activates when grinding, can obtain the mineral admixture that the activity is higher, the granularity is more suitable.

(2) The utility model discloses to grind and go on in step with the activation for production technology is simpler, high-efficient, and the production facility structure is compacter, reasonable in design, and degree of automation is high, and convenient operation has saved a large amount of manpower and materials.

Drawings

In order to clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a block diagram of a mineral admixture manufacturing system according to the present disclosure.

In the figure: 1-a tailings silo; 2-belt weighing; 3-a rotary dryer; 4-fluidized bed furnace; 5-material stabilizing bin; 6-a material metering device; 7-an activator vessel; 8-dosing metering device; 9-grinding; 10-an air flow separator; 11-a cyclone collector; 12-a dust remover; 13-mineral admixture finished product warehouse; 14-a crusher; 15-drum screen.

Detailed Description

The following description briefly describes embodiments of the present invention with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work based on the embodiments of the present invention belong to the protection scope of the present invention.

Fig. 1 shows a preferred embodiment of the present invention, which is parsed in detail.

A mineral admixture preparation system as shown in fig. 1, comprising a drying system for drying the tailings raw material, a crushing-screening system for crushing and screening the dried material, an integrated tailings grinding-activating system for grinding and activating the tailings, an air flow separator 10 for separating the ground-activated material, and a cyclone dust collection system for collecting the mineral admixture up to the standard.

The drying system comprises a dryer for drying the tailings and a fluidized bed furnace 4 for supplying heat to the dryer, wherein the dryer is a rotary dryer 3. The tailings stored in the tailings storage bin 1 are metered by a belt metering scale 2 and conveyed to a rotary dryer 3, the rotary dryer 3 dries the tailings under the heat supply of a fluidized bed furnace 4, and the dried tailings are input to a crusher 14 for crushing.

The crushing-screening system comprises a crusher 14 for crushing the tailings and a trommel 15 for screening the crushed tailings. The screened fine materials are directly input into a material stabilizing bin 5, and the coarse materials are returned to a crusher 14 for crushing and screening again until the requirement of the particle size is met.

The integrated tailings grinding-activation system comprises a mill 9 for grinding the tailings, an activator vessel 7 for storing the activator, and a dosing device 8. The mill 9 is a vertical mill, and comprises a feeding pipe, a grinding disc and a separator. The blanking pipe is used for feeding materials and activating agents into an inlet of the mill 9 and is directly communicated with the center of the grinding disc, the separator is used for screening the materials according to particle sizes, and large-particle materials directly return to the mill 9 through the separator and are repeatedly ground. The material stabilizing bin 5 is provided with a material metering device 6, the material metering device 6 is connected with a discharging pipe, tailings stored in the material stabilizing bin 5 enter a grinding machine through the material metering device 6 and fall to the center of a grinding disc through the discharging pipe, grinding and crushing are carried out on a plurality of grinding rollers on the grinding disc, and the grinded tailings are output to an air flow separator 10 for separation. The outlet of the dosing metering device 8 is connected with a blanking pipe, and an activating agent in the activating agent container 7 enters a mill through the dosing metering device 8 to be activated. Grinding and activation are carried out synchronously, so that the production process is simpler and more efficient, the production equipment is more compact in structure, reasonable in design, high in automation degree and convenient to operate, and a large amount of manpower and material resources are saved. The activator is organic agent TE activator, is compounded by three chemical products, and the main component of the activator is carbohydrate derivatives. The mass ratio of the addition amount of the TE activating agent to the dried material is 2:1000-5: 1000.

The airflow separator 10 is arranged at a discharge port of the mill 9, tailings ground by the mill 9 are separated by the airflow separator 10, and the mineral admixture which reaches the standard is collected to the mineral admixture finished product warehouse 13 through the cyclone dust removal collection system. The cyclone dust collecting system includes a cyclone collector 11 and a dust collector 12. The air flow separator 10 is also provided with a fine sand outlet which is connected with a feed inlet of the mill 9. And (4) sorting by an airflow sorting machine 10, and inputting the mineral admixture which does not reach the standard into the mill 9 again through a fine sand outlet to grind again until the mineral admixture reaches the standard.

The method for preparing the mineral admixture by using the system comprises the following steps:

the method comprises the following steps: the tailing raw material is input into a tailing bin 1, is measured by a belt weigher 2 and is conveyed to a rotary dryer 3, and a fluidized bed furnace 4 is used as a heat supply system to dry the tailing.

Step two: the dried tailings are input into a crusher 14 to be crushed, the crushed materials are input into a drum screen 15 to be screened, the fine materials are input into a material stabilizing bin 5, and the coarse materials are returned to the crusher 14 to be crushed and screened again until the particle size requirement is met.

Step three: tailings in the material stabilizing bin 5 are weighed by the material metering device 6, enter the grinding mill 9 through a discharging pipe of the grinding mill 9, and are crushed and ground under the rolling action of a plurality of grinding rollers on the grinding disc. Meanwhile, a tailing activating agent is weighed by a chemical adding metering device 8 according to a certain mass ratio and added into a mill 9 for activation.

Step four: after the materials are ground and activated, mineral admixture up to the standard is sorted out by an airflow sorting machine 10, collected by a cyclone collector 11 and a dust remover 12 and input into a mineral admixture finished product warehouse 13; returning the mineral admixture which does not reach the standard to the mill 9 through a fine sand outlet, and repeating the second step until the mineral admixture reaches the standard.

Step five: and D, leaving the mineral admixture in bulk or in bags.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A mineral admixture preparation system is characterized by comprising a drying system for drying tailing raw materials, a crushing-screening system for crushing and screening the dried materials, an integrated tailing grinding-activating system for grinding and activating tailings and a cyclone dust removal collecting system for collecting mineral admixtures reaching the standard; the drying system comprises a dryer for drying the tailings and a fluidized bed furnace (4) for supplying heat to the dryer; the crushing-screening system comprises a crusher (14) and a trommel (15); the integrated tailing grinding-activation system comprises a grinder (9) for grinding tailings, an activator container (7) for storing an activator and a dosing device (8); the dosing metering device (8) is connected to the inlet of the mill (9), and the activating agent in the activating agent container (7) enters the mill (9) through the dosing metering device (8); the cyclone dust collection system comprises a cyclone collector (11) and a dust remover (12).

2. The mineral admixture preparation system according to claim 1, further comprising an air classifier (10) for classifying the ground-activated material, wherein said air classifier (10) is disposed at the outlet of the mill (9) and is further provided with a fine sand outlet, and said fine sand outlet is connected to the inlet of the mill (9).

3. The mineral admixture preparation system according to claim 1, wherein said mill (9) is a vertical mill comprising a discharge pipe, a grinding disc, a separator, said discharge pipe being an inlet of the mill (9), said dosing metering device (8) outlet being connected to the discharge pipe.

4. The system of claim 1, wherein the activator used in the integrated tailings grinding-activation system is an organic or inorganic activator.