CN203174177U - Circulating water recovery device used in magnesium smelting process - Google Patents

Abstract

Circulating water recovery device in the magnesium smelting process, a high temperature pool (12) is installed above the low temperature pool (11), a water pump station (8) is installed next to the low temperature pool (11), and the high temperature drain pipe (6) is connected by the reduction workshop (10) Enter the high temperature pool (12), the high temperature pump water pipe (7) is connected to the water pump station (8) by the high temperature pool (12), the low temperature pump water pipe (13) is connected to the water pump station (8) by the low temperature pool (11), and the low temperature water supply pipe (9) The water pumping station (8) is connected to the reduction workshop (10), and the heating pipe outlet pipe (1) is led out from the water pumping station (8) to connect to the main heating pipe (4), and then connected to the heating pipe return pipe (5) to be connected back Cryogenic pool (11). Effectively use the waste heat of the high-temperature circulating water in the reduction workshop for external heating or bathing, realize the recovery and regulation of the waste heat of the circulating water, reduce the investment and construction of heating and bathing heating equipment, save energy and reduce emissions, environmental protection and safety, improve production management level and economy benefit.

Description

Circulating water recovery device in magnesium smelting process

technical field

The utility model relates to the technical field of the magnesium smelting industry, in particular to a circulating water recovery device in the magnesium smelting process.

Background technique

Magnesium smelting methods are mainly divided into two types: one is the silicon thermal reduction method, and the other is the electrolysis method; at present, most domestic magnesium smelting manufacturers use the Pidgeon method in the silicon thermal reduction method, which is relatively mature. The production of metal magnesium is based on calcined dolomite or magnesite ore as raw material, ferrosilicon as reducing agent, fluorite as catalyst, metering and batching, after grinding, pressing into balls, called pellets, and putting the balls into the reduction tank , heated to about 1200°C, and the interior is vacuumed to 13.3Pa or higher, then magnesium vapor will be generated, and the magnesium vapor will form crystalline magnesium in the condenser at the front end of the reduction tank, also known as crude magnesium, and then refined with a fluxing agent to produce commercial products Magnesium ingot, that is, refined magnesium. Specifically, the Pidgeon method magnesium smelting production process includes: (1) dolomite calcination: heating dolomite to 1100-1200°C in a rotary kiln or a shaft kiln, and firing calcined white MgO+CaO; (2) batching and making balls : Calcined white, ferrosilicon powder and fluorite powder are measured, batched, and ground, and then pressed into balls; (3) Reduction: Heat the balls to about 1200°C in a reduction tank, and vacuum them at 13.3Pa or higher Keep it for 8 to 10 hours, the magnesium oxide will be reduced to magnesium vapor, which will become rough magnesium after condensation; (4) Refining and casting: heat and melt the rough magnesium, refine it with a flux at a high temperature of about 710°C, and cast it into a magnesium ingot , also known as refined magnesium; (5) Pickling: Clean the surface of magnesium ingots with sulfuric acid or nitric acid to remove surface inclusions and make the surface beautiful. Pidgeon method production of magnesium production equipment includes direct-fired reduction furnaces with 26-51 reduction tanks per furnace, direct-fired refining furnaces, and rotary kilns. The energy consumption of magnesium production process by Pidgeon method is as follows: calcining 1 ton of magnesium consumes 2.8 tons of raw coal, reducing 1 ton of magnesium consumes 3 tons of raw coal, and refining 1 ton of magnesium consumes 0.5 ton of raw coal.

During the magnesium smelting process, the crystallizer needs to be cooled by water circulation. After water circulation, the water temperature has been greatly improved. In the past, natural cooling was adopted, and the resource of circulating water waste heat was not well utilized.

Contents of the invention

The purpose of the invention of the utility model is to provide a circulating water recovery device in the magnesium smelting process.

The measures to realize the invention purpose of the present utility model are: install a high-temperature pool above the low-temperature pool, install a water pump station next to the low-temperature pool, connect the high-temperature drain pipe to the high-temperature pool by the reduction workshop, and connect the high-temperature pump water pipe to the water pump station by connecting the high-temperature pool, and the low-temperature pump The water pipe is connected to the water pumping station from the low-temperature pool, the low-temperature water supply pipe is connected to the reduction workshop by the water pumping station, the outlet pipe of the heating pipe is led out from the water pumping station to connect to the main heating pipe, and then connected to the return pipe of the heating pipe to return to the low-temperature pool.

The utility model has the advantage that by setting the low-temperature pool, the high-temperature pool and the pump pipe system, the waste heat of the high-temperature circulating water in the reduction workshop can be effectively used for external heating or bathing, and the recovery and regulation of the waste heat of the circulating water can be realized, and the heating and bathing heat supply can be reduced. The equipment investment and construction link, energy saving and emission reduction, environmental protection and safety, improve production management level and economic benefits.

Description of drawings

Fig. 1 is the structure of the utility model and installation schematic diagram

Reference signs include:

Heating pipe outlet pipe 1, bath water branch pipe 2, filtration system 3, heating main pipe 4, heating pipe return pipe 5, high temperature drain pipe 6, high temperature pump water pipe 7, water pump station 8, low temperature water supply pipe 9, restoration workshop 10, Low temperature pool 11, high temperature pool 12, cryopump water pipe 13.

Detailed ways

The utility model transports the high-temperature circulating water used for the crude magnesium crystallizer to the bathroom through the pipeline, and then provides hot water through the heat exchanger; at the same time, the high-temperature circulating water of the crude magnesium crystallizer is transported to the production and living areas through the pipeline. for heating.

Further description will be given below in conjunction with the accompanying drawings and embodiments.

As shown in Figure 1, a high-temperature pool 12 is installed above the low-temperature pool 11, and a water pump station 8 is installed next to the low-temperature pool 11. Enter the water pumping station 8, the low-temperature pump water pipe 13 is connected to the water pumping station 8 by the low-temperature pool 11, the low-temperature water supply pipe 9 is connected to the reduction workshop 10 by the water pumping station 8, and the heating pipe outlet pipe 1 is connected to the main heating pipe 4 by the water pumping station 8, and then Connect the heating pipeline return pipe 5 to take back the low temperature pool 11.

In the foregoing, the main heating pipe 4 or the water pumping station 8 is connected to the water branch pipe 2 for bathing and bathing, and the water branch pipe 2 for bathing and bathing is connected to the filtration system 3 . Part of the hot water at a higher temperature after being processed by the filter system 3 is sent to the bathing area for use.

In the foregoing, valves are installed on each relevant pipeline for effective control.

In the foregoing, the low-temperature pool 11 and the high-temperature pool 12 are directly connected through regulating pumps and pipelines. Quickly adjust the water temperature when needed.

When the utility model is working, the high-temperature water drawn from the reduction workshop 10 is discharged into the high-temperature pool 12 through the high-temperature drain pipe 6, then pumped into the water pump station 8 through the high-temperature pump water pipe 7, and then connected to the heating trunk by the heating pipe outlet pipe 1 The heating cycle of the pipeline 4 is used to effectively utilize waste heat. The low-temperature water in the main heating pipeline 4 after exchange and cooling is connected to the low-temperature pool 11 through the return pipe 5 of the heating pipeline; then, the water pump station 8 draws low-temperature water from the low-temperature pool 11 through the low-temperature pump water pipe 13 It is transported to the reduction workshop 10 for work through the low-temperature water supply pipe 9 .

The utility model transports the high-temperature circulating water used for the crude magnesium crystallizer to production and living heating equipment and bathing equipment through pipelines, and realizes the recovery and utilization of the waste heat of the high-temperature circulating water.

In the above embodiments, other necessary technologies related to implementation that are not mentioned in the description are based on existing technologies, and will not be listed in detail in sequence.

Claims (3)

1. recirculated water retrieving arrangement in the magnesium smelting technology, it is characterized in that: in low temperature cell (11) top high temperature pond (12) is installed, at the other pump works (8) of installing of low temperature cell (11), high temperature water shoot (6) connects into high temperature pond (12) by reduction plant (10), high-temperature pump water pipe (7) connects into pump works (8) by high temperature pond (12), cryopump water pipe (13) connects into pump works (8) by low temperature cell (11), low temperature water-supply pipe (9) is connected to reduction plant (10) by pump works (8), hot duct rising pipe (1) is drawn by pump works (8) and is connected heating main conduit (4), connects hot duct return water pipe (5) then and takes back low temperature cell (11).

2. recirculated water retrieving arrangement in the magnesium smelting technology as claimed in claim 1 is characterized in that, is connected for bath water arm (2) by heating main conduit (4) or pump works (8), and this connects filtering system (3) for bath water arm (2).

3. recirculated water retrieving arrangement in the magnesium smelting technology as claimed in claim 1 is characterized in that, directly is connected with pipeline by regulating pump between low temperature cell (11) and high temperature pond (12).

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