CN111495554A

CN111495554A - Intensive short-process bauxite grinding process system

Info

Publication number: CN111495554A
Application number: CN202010337966.XA
Authority: CN
Inventors: 刘吉; 鹿方; 黎娜; 刘利; 邢苗苗; 邱峰
Original assignee: Northeastern University Engineering and Research Institute Co Ltd
Current assignee: Northeastern University Engineering and Research Institute Co Ltd
Priority date: 2020-04-26
Filing date: 2020-04-26
Publication date: 2020-08-07

Abstract

An intensive short-process bauxite grinding process system is characterized in that a receiving hopper is arranged below a material pile, a first belt conveyor is arranged above the material pile, and a rod-type gate valve is arranged at a discharge port of the receiving hopper; heavy plate feeder establishes in the receiving hopper below, heavy plate feeder feed end links to each other with the receiving hopper discharge gate, heavy plate feeder discharge end links to each other with second band conveyer feed end, second band conveyer discharge end links to each other with the breaker feed inlet, the breaker discharge gate links to each other with third band conveyer feed end, third band conveyer discharge end links to each other with vertical mill feed inlet, vertical mill discharge gate links to each other with the cyclone feed inlet, the cyclone discharge gate links to each other with the ground paste preparation system, the cyclone air outlet links to each other with the bag collector feed inlet, the cyclone air intake links to each other with the hot air source, the bag collector discharge gate links to each other with the ground paste preparation system, the bag collector air outlet links to each other with the draught fan air intake, the draught fan air outlet communicates with each other with the atmosphere.

Description

Intensive short-process bauxite grinding process system

Technical Field

The invention belongs to the technical field of alumina production, and particularly relates to an intensive short-process bauxite grinding process system.

Background

With the progress of the process technology, the process technology and equipment of each flow in the production of the aluminum oxide are continuously improved and optimized, and the technical indexes of small occupied area, low investment and operation cost, high automation degree, stable operation and the like become the key focus of attention of production enterprises and design units.

In a traditional slurry preparation process system, a bauxite homogenization storage yard needs to be configured, a material stacking machine or a belt conveyor is generally adopted to distribute materials in the bauxite homogenization storage yard, and the cross section of the material stack is in a herringbone shape; in the ore pulp grinding process, an aluminum ore bin is required to be additionally arranged for temporary storage of aluminum ore, and a quantitative feeder is required to be arranged below the aluminum ore bin and used for conveying the aluminum ore to a grinding machine.

However, the traditional slurry preparation process system not only occupies a large area, but also increases the viscosity of the aluminum ore if the water content of the aluminum ore is high, and the aluminum ore material with high viscosity is easy to adhere to the surface of the silo wall and cannot be discharged from the feed opening, so that the blockage is caused.

Therefore, in order to solve the problem of material blockage at the bin bottom, an air cannon is often required to be added, and the cone angle at the bin bottom needs to be increased, but the method inevitably needs to raise the height of the bin body integrally, so that the difficulty in conveying materials at the bin top is increased, and the investment on civil engineering and equipment is inevitably increased.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides an intensive short-process bauxite grinding process system, wherein conveying equipment is directly arranged below a storage yard, equipment such as a stacker-reclaimer and the like is omitted, a plurality of intermediate transfer links are reduced, the process is simplified, and the occupied area and the investment are saved.

In order to achieve the purpose, the invention adopts the following technical scheme: an intensive short-process bauxite grinding process system comprises a receiving hopper, a rod-type gate valve, a heavy plate feeder, a crusher, a vertical mill, a cyclone dust collector, a bag-type dust collector, an induced draft fan, a first belt conveyor, a second belt conveyor and a third belt conveyor; the receiving hopper is arranged below the material pile, the first belt conveyor is arranged above the material pile, and the rod type gate valve is arranged at a discharge port at the bottom end of the receiving hopper; heavy plate feeder sets up in receiving the material funnel below, heavy plate feeder's feed end links to each other with the bottom discharge gate that receives the material funnel, heavy plate feeder's discharge end links to each other with the feed end of second band conveyer, the discharge end of second band conveyer links to each other with the feed inlet of breaker, the discharge gate of breaker links to each other with the feed end of third band conveyer, the discharge end of third band conveyer links to each other with the feed inlet of vertical mill, the discharge gate of vertical mill links to each other with cyclone's feed inlet, cyclone's discharge gate links to each other with ground paste preparation system, cyclone's air outlet links to each other with bag collector's feed inlet, cyclone's air intake links to each other with hot air source, bag collector's discharge gate links to each other with ground paste preparation system, bag collector's air outlet links to each other with the air intake of draught fan, the air outlet of draught fan communicates with each other with the atmosphere.

The invention has the beneficial effects that:

according to the intensive short-process bauxite grinding process system, the conveying equipment is directly arranged below the material pile, the material piling and taking machine and other equipment are omitted, a plurality of middle transfer links are reduced, the process is simplified, and the occupied area and the investment are saved. Meanwhile, the vertical mill is introduced, the grinding requirement of the vertical mill is low, so that the requirement on a crushing process is reduced, the crushing is reduced, the operating power of the vertical mill is lower than that of a traditional ball mill, and the operating cost of a system is further reduced.

Drawings

FIG. 1 is a schematic structural diagram of an intensive short-run bauxite milling process system according to the present invention;

in the figure, 1-receiving hopper, 2-bar gate valve, 3-heavy plate feeder, 4-crusher, 5-vertical mill, 6-cyclone dust collector, 7-bag dust collector, 8-induced draft fan, 9-first belt conveyor, 10-second belt conveyor, 11-third belt conveyor, and 12-material pile.

Detailed Description

The invention is described in further detail below with reference to the figures and the specific embodiments.

As shown in fig. 1, an intensive short-process bauxite grinding process system comprises a receiving hopper 1, a bar gate valve 2, a heavy duty plate feeder 3, a crusher 4, a vertical mill 5, a cyclone dust collector 6, a bag type dust collector 7, an induced draft fan 8, a first belt conveyor 9, a second belt conveyor 10 and a third belt conveyor 11; the receiving hopper 1 is arranged below the material pile 12, the first belt conveyor 9 is arranged above the material pile 12, and the rod type gate valve 2 is arranged at a discharge port at the bottom end of the receiving hopper 1; the heavy plate feeder 3 is arranged below the receiving hopper 1, the feed end of the heavy plate feeder 3 is connected with the bottom discharge port of the receiving hopper 1, the discharge end of the heavy plate feeder 3 is connected with the feed end of the second belt conveyor 10, the discharge end of the second belt conveyor 10 is connected with the feed port of the crusher 4, the discharge port of the crusher 4 is connected with the feed end of the third belt conveyor 11, the discharge end of the third belt conveyor 11 is connected with the feed port of the vertical mill 5, the discharge port of the vertical mill 5 is connected with the feed port of the cyclone dust collector 6, the discharge port of the cyclone dust collector 6 is connected with the slurry preparation system, the air outlet of the cyclone dust collector 6 is connected with the feed port of the bag-type dust collector 7, the air inlet of the cyclone dust collector 7 is connected with a hot air source, the discharge port of the bag-type dust collector 7 is connected with the slurry preparation system, the air outlet of the bag-type dust collector 7 is connected with the air inlet of, the air outlet of the induced draft fan 8 is communicated with the atmosphere.

The one-time use process of the present invention is described below with reference to the accompanying drawings:

bauxite raw materials are conveyed to a closed storage yard through a first belt conveyor 9 to be stacked and stored, a material pile 12 with a trapezoidal section is formed, materials in the material pile 12 can automatically flow into a receiving hopper 1 under the action of gravity, and after a rod type gate valve 2 is opened, the materials in the receiving hopper 1 can automatically flow out under the action of gravity and directly flow into a heavy plate type feeder 3, so that continuous blanking is formed.

The material discharged from the heavy duty plate feeder 3 is transported into the crusher 4 by the second belt conveyor 10, and the bauxite raw material is crushed into a material with a smaller grain size by the crusher 4. And for the materials with qualified particle size after crushing, the materials are conveyed into the vertical mill 5 through the third belt conveyor 11, and for the materials with unqualified particle size after crushing, the materials are returned to the crusher 4 in a closed loop for re-crushing.

After the materials enter the vertical mill 5, the materials are ground through the vertical mill 5, hot air is introduced into the lower side surface of the vertical mill 5, the introduced hot air can adopt waste heat of flue gas generated by other procedures of an alumina plant, the ground qualified materials directly enter the cyclone dust collector 6 under the carrying of the hot air, and the ground unqualified materials are returned to the vertical mill 5 for grinding again in a closed circuit.

After the materials enter the cyclone dust collector 6, the gas-solid separation of hot air and most of the materials is realized, the separated materials are directly input into the slurry preparation system, the hot air carries a small part of the remaining materials into the bag type dust collector 7, the remaining materials carried in the hot air can be completely separated through the bag type dust collector 7, the separated materials are also directly input into the slurry preparation system, and the hot air after the gas-solid separation is finished is directly discharged into the atmosphere through the induced draft fan 8.

The embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications without departing from the scope of the present invention are intended to be included in the scope of the present invention.

Claims

1. An intensive short-process bauxite grinding process system is characterized in that: the device comprises a receiving hopper, a bar gate valve, a heavy plate feeder, a crusher, a vertical mill, a cyclone dust collector, a bag type dust collector, a draught fan, a first belt conveyor, a second belt conveyor and a third belt conveyor; the receiving hopper is arranged below the material pile, the first belt conveyor is arranged above the material pile, and the rod type gate valve is arranged at a discharge port at the bottom end of the receiving hopper; heavy plate feeder sets up in receiving the material funnel below, heavy plate feeder's feed end links to each other with the bottom discharge gate that receives the material funnel, heavy plate feeder's discharge end links to each other with the feed end of second band conveyer, the discharge end of second band conveyer links to each other with the feed inlet of breaker, the discharge gate of breaker links to each other with the feed end of third band conveyer, the discharge end of third band conveyer links to each other with the feed inlet of vertical mill, the discharge gate of vertical mill links to each other with cyclone's feed inlet, cyclone's discharge gate links to each other with ground paste preparation system, cyclone's air outlet links to each other with bag collector's feed inlet, cyclone's air intake links to each other with hot air source, bag collector's discharge gate links to each other with ground paste preparation system, bag collector's air outlet links to each other with the air intake of draught fan, the air outlet of draught fan communicates with each other with the atmosphere.