CN215628218U

CN215628218U - Production line for producing silicon-manganese alloy from manganese carbonate ore

Info

Publication number: CN215628218U
Application number: CN202121491340.0U
Authority: CN
Inventors: 贾天将; 段锋; 张武生; 徐建功; 宋正平
Original assignee: Ningxia Tianyuan Manganese Material Research Institute Co ltd
Current assignee: Ningxia Tianyuan Manganese Material Research Institute Co ltd
Priority date: 2021-07-02
Filing date: 2021-07-02
Publication date: 2022-01-25
Anticipated expiration: 2031-07-02

Abstract

The utility model belongs to the technical field of metallurgical processing, and relates to a production line for producing a silicon-manganese alloy from manganese carbonate ore. The production line comprises a manganese carbonate pit, a first crusher, a second crusher, a first screening machine, a second screening machine, an ore powder tank, a slag tank, a dust removal ash tank, a fuel tank, a first proportioning machine, a second proportioning machine, a belt type sintering machine, a sintering ore tank, a silica tank, an ore tank, a high manganese slag tank, a coke tank, a submerged arc furnace and a silicon-manganese alloy tank. The production line takes low-grade manganese carbonate ore with low price as a main raw material, so that the cost of the raw material and the power consumption of smelting are effectively reduced, and the yield of the silicon-manganese alloy is improved.

Description

Production line for producing silicon-manganese alloy from manganese carbonate ore

Technical Field

The utility model belongs to the technical field of metallurgical processing, and relates to a production line for producing a silicon-manganese alloy from manganese carbonate ore.

Background

The manganese-silicon alloy is an alloy consisting of manganese, silicon, iron, a small amount of carbon and other elements, and has wide application and high yield.

The raw materials for producing the manganese-silicon alloy comprise manganese ore, manganese-rich slag, silica, coke, dolomite (or limestone) and fluorite; the manganese-silicon alloy can be produced by using one manganese ore or a mixed ore of several manganese ores (including manganese-rich slag). Because the manganese-silicon alloy requires that the contents of iron and phosphorus are lower than that of high-carbon ferromanganese, the manganese ore for smelting the manganese-silicon alloy is required to have higher manganese-iron ratio and manganese-phosphorus ratio; therefore, the higher the manganese content of the manganese ore, the better the indexes.

The general grade of manganese ore in China is low, and some high-grade manganese ore is needed to be matched to ensure the content of manganese element in manganese-silicon alloy products and the smooth production; meanwhile, in order to balance the cost and the product quality, manganese-silicon alloy smelting is usually carried out by matching various manganese ores. The feeding granularity of manganese ore is generally 10-80 mm; meanwhile, in order to reduce the ore cost, some manganese powder and coke powder under the sieve, dust collected by a dust removal system, lime powder and the like in the production can also be used for producing manganese sinter, and the manganese sinter is finally sent into an electric furnace for smelting.

Because manganese carbonate ore has lower grade and low price compared with manganese oxide ore, manganese carbonate ore is mostly used for reducing ore cost; however, in the conventional manganese-silicon alloy production process, manganese carbonate lump ore is usually directly fed into a furnace, and at the moment, because the carbon dioxide generated by decomposition of manganese carbonate ore during smelting is large, furnace turnover accidents easily occur when the air permeability of furnace charge is poor, and heat loss is large, the usage amount of manganese carbonate ore is limited, so that the addition amount of manganese carbonate ore is generally 20-30%.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a production line for producing silicon-manganese alloy from manganese carbonate ore, which effectively reduces the cost of raw materials and the power consumption of smelting and improves the yield of the silicon-manganese alloy.

The technical scheme of the utility model for solving the technical problems is as follows.

A production line for producing silicomanganese alloy from manganese carbonate ore comprises a manganese carbonate ore pit, a first crusher, a second crusher, a first screening machine, a second screening machine, an ore powder tank, a slag tank, a dedusting ash tank, a fuel tank, a first batching machine, a second batching machine, a belt sintering machine, a sintering ore tank, a silica tank, an ore tank, a high manganese slag tank, a coke tank, an ore heating furnace and a silicomanganese alloy tank; the manganese carbonate pit is connected with a feed inlet of a first crusher through a lifter, a discharge port of the first crusher is connected with a feed inlet of a first sieving machine, a qualified material outlet of the first sieving machine is connected with a feed inlet of an ore powder tank, discharge ports of the ore powder tank, a slag tank, a dedusting ash tank and a fuel tank are all connected with a feed inlet of a first proportioning machine, a discharge port of the first proportioning machine is connected with a feed inlet of a belt sintering machine, a discharge port of the belt sintering machine is connected with a feed inlet of a second crusher, a discharge port of the second crusher is connected with a feed inlet of a second sieving machine, a qualified material outlet of the second sieving machine is connected with a feed inlet of a sintering ore tank, the sintering ore tank and a silica tank, the discharge ports of the ore tank, the high manganese slag tank and the coke tank are connected with the feed port of the second proportioning machine, the discharge port of the second proportioning machine is connected with the feed port of the submerged arc furnace, and the discharge port of the submerged arc furnace is connected with the feed port of the silicon-manganese alloy tank. According to the technical scheme, the low-grade manganese carbonate ore with low price is used as the main raw material, so that the process that high-price and high-grade manganese oxide ore and manganese-rich slag need to be matched in the traditional process is reduced, and the cost of the raw material is effectively reduced; the manganese carbonate ore after crushing and screening is produced into high-grade manganese carbonate sinter ore together with other materials by a belt type sintering machine, so that the power consumption in the smelting process is reduced, and the yield of silicon-manganese alloy is improved; the manganese carbonate ore processed by sintering effectively reduces the generation amount of tail gas in the submerged arc furnace and improves the operation safety of the submerged arc furnace.

Furthermore, in the production line, one of sulfuric acid residue, electrolytic manganese fine filter residue or iron fine powder is stored in the residue tank; effectively utilizes industrial waste, reduces the cost of raw materials and the storage site of the industrial waste, and effectively recycles the industrial waste.

Furthermore, in the production line, dolomite or fluorite is stored in the ore tank.

Further, the production line also comprises a first temporary storage tank; an unqualified material outlet of the first screening machine is connected with a feed inlet of a first temporary storage tank, and a discharge outlet of the first temporary storage tank is connected with a feed inlet of a first crusher; the device also comprises a second temporary storage tank; an unqualified material outlet of the second screening machine is connected with a feed inlet of a second temporary storage tank, and a discharge outlet of the second temporary storage tank is connected with a feed inlet of a second crusher; unqualified materials after screening can be crushed and screened again, and the utilization rate of the materials is improved.

Furthermore, in the production line, stirring mechanisms are arranged inside the first batching machine and the second batching machine; the materials can be mixed more uniformly.

Furthermore, in the production line, the tank bodies of the first batching machine and the second batching machine are both provided with gravity sensing devices; the materials can be mixed according to the weight requirement.

Furthermore, in the production line, the pit body of the manganese carbonate pit is arranged underground; the space on the ground is saved more, and the investment of manganese carbonate ore is more convenient and faster.

Further, the production line also comprises a belt conveyor; the first screening machine and the mineral powder tank, the first proportioning machine and the strand sintering machine, the strand sintering machine and the second crusher, the second screening machine and the sintering ore tank, the second proportioning machine and the submerged arc furnace, and the submerged arc furnace and the silicon-manganese alloy tank are connected through belt conveyors; the material is carried more smoothly.

The production line for producing the silicon-manganese alloy by using the manganese carbonate ore has the beneficial effects that:

(1) the low-cost low-grade manganese carbonate ore is used as a main raw material, and high-cost high-grade manganese oxide ore and manganese-rich slag which need to be matched in the traditional process are omitted, so that the raw material cost is effectively reduced;

(2) the manganese-iron ratio of the raw materials entering the furnace is adjusted by adopting solid waste sulfuric acid slag generated by producing sulfuric acid or solid waste fine filter slag or iron fine powder generated by producing electrolytic manganese, and the traditional process of adjusting the manganese-iron ratio of the raw materials entering the furnace by matching various ores is replaced, so that the types of the raw materials and the raw material storage field are reduced, and the raw material purchasing cost is reduced; meanwhile, an effective way is found for recycling the solid waste sulfuric acid residue generated in the production of sulfuric acid and the solid waste fine filter residue generated in the production of electrolytic manganese;

(3) after crushing, screening and sintering, the grade of manganese carbonate ore can be improved to about 38 percent, the smelting power consumption is effectively reduced, and the yield of silicon-manganese alloy is improved;

(4) the manganese carbonate ore is sintered, so that a large amount of carbon dioxide is discharged in a sintering section, the content of the tail gas of the submerged arc furnace is reduced, the yield of the tail gas of the submerged arc furnace is reduced, the operation of the submerged arc furnace is safer and more stable, the content of carbon monoxide in the tail gas of the submerged arc furnace and the heat value of coal gas are improved, and the additional value of the tail gas is improved; meanwhile, the equipment investment and the operation cost of the tail gas dust removal system of the submerged arc furnace are reduced.

Drawings

FIG. 1 is a schematic structural diagram of a production line for producing a silicomanganese alloy from manganese carbonate ore according to the present invention.

The codes in the figures are respectively: 1. manganese carbonate pits; 2-1, a first crusher; 2-2, a second crusher; 3-1, a first screening machine; 3-2, a second screening machine; 4-1, a mineral powder tank; 4-2, a slag pot; 4-3, a dust removal ash tank; 4-4, a fuel tank; 5-1, a first dosing machine; 5-2, a second dosing machine; 6. a strand sintering machine; 7-1, sintering ore tanks; 7-2, silica pots; 7-3, a mineral tank; 7-4, a high manganese slag tank; 7-5, a coke drum; 8. a submerged arc furnace; 9. a silicon-manganese alloy tank; 10-1, a first temporary storage tank; 10-2, a second temporary storage tank; 11. a belt conveyor.

Detailed Description

As shown in figure 1, the production line for producing silicomanganese alloy from manganese carbonate ore comprises a manganese carbonate ore pit 1, a first crusher 2-1, a second crusher 2-2, a first screening machine 3-1, a second screening machine 3-2, an ore powder tank 4-1, a slag tank 4-2, a dedusting ash tank 4-3, a fuel tank 4-4, a first proportioning machine 5-1, a second proportioning machine 5-2, a belt type sintering machine 6, a sintering ore tank 7-1, a silica tank 7-2, an ore tank 7-3, a high manganese slag tank 7-4, a coke tank 7-5, an ore heating furnace 8, a silicomanganese alloy tank 9, a first temporary storage tank 10-1, a second temporary storage tank 10-2 and a belt conveyor 11; the pit body of the manganese carbonate pit 1 is arranged underground, the first proportioning machine 5-1 and the second proportioning machine 5-2 are both internally provided with stirring mechanisms, and the tank body is provided with gravity sensing devices.

The manganese carbonate pit 1 is connected with a feeding hole of a first crusher 2-1 through a hoisting machine, a discharging hole of the first crusher 2-1 is connected with a feeding hole of a first screening machine 3-1, a qualified material outlet of the first screening machine 3-1 is connected with a feeding hole of a mineral powder tank 4-1 through a belt conveyer 11, discharging holes of the mineral powder tank 4-1, a slag tank 4-2, a dust removal ash tank 4-3 and a fuel tank 4-4 are all connected with a feeding hole of a first proportioning machine 5-1, a discharging hole of the first proportioning machine 5-1 is connected with a feeding hole of a belt sintering machine 6 through the belt conveyer 11, a discharging hole of the belt sintering machine 6 is connected with a feeding hole of a second crusher 2-2 through the belt conveyer 11, a discharging hole of the second crusher 2-2 is connected with a feeding hole of the second screening machine 3-2, a qualified material outlet of the second screening machine 3-2 is connected with a feed inlet of a sintering ore tank 7-1 through a belt conveyor 11, discharge outlets of the sintering ore tank 7-1, a silica tank 7-2, an ore tank 7-3, a high manganese slag tank 7-4 and a coke tank 7-5 are all connected with a feed inlet of a second proportioning machine 5-2, a discharge outlet of the second proportioning machine 5-2 is connected with a feed inlet of a submerged arc furnace 8 through the belt conveyor 11, and a discharge outlet of the submerged arc furnace 8 is connected with a feed inlet of a silicon-manganese alloy tank 9 through the belt conveyor 11; in addition, an unqualified material outlet of the first screening machine 3-1 is connected with a feed inlet of the first temporary storage tank 10-1, and a discharge outlet of the first temporary storage tank 10-1 is connected with a feed inlet of the first crusher 2-1; an unqualified material outlet of the second screening machine 3-2 is connected with a feed inlet of a second temporary storage tank 10-2, and a discharge outlet of the second temporary storage tank 10-2 is connected with a feed inlet of a second crusher 2-2.

Blocky manganese carbonate ores are stored in the manganese carbonate pit 1; solid waste sulfuric acid slag generated in sulfuric acid production or solid waste electrolytic manganese fine filter residue or iron fine powder generated in the electrolytic manganese process is stored in the slag tank 4-2; dust collected by a dust removal system is stored in the dust removal tank 4-3; the storage tank in the fuel tank 4-4 is filled with coke powder or blue carbon powder; silica is stored in the silica tank 7-2; dolomite or fluorite is stored in the ore tank 7-3; high manganese slag generated in the manganese electrolysis process is stored in the high manganese slag tank 7-4; coke is stored in the coke tank 7-5.

The production line for producing the silicon-manganese alloy by using the manganese carbonate ore comprises the following process steps: (1) crushing manganese carbonate ores (with the grade of about 26% and the granularity of 0-200 mm) stored in a manganese carbonate pit 1 by a first crusher 2-1 and screening by a first screening machine 3-1 to obtain small-granularity manganese carbonate ores with the granularity of 0-10 mm, and storing the small-granularity manganese carbonate ores in an ore powder tank 4-1; (2) feeding small-particle-size manganese carbonate ore in an ore powder tank 4-1, a slag tank 4-2, a dedusting ash tank 4-3 and a fuel tank 4-4 into a first proportioning machine 5-1 according to certain weight, stirring, mixing and proportioning, feeding into a belt type sintering machine 6 to produce high-grade manganese carbonate sinter, crushing by a second crusher 2-2, screening by a second screening machine 3-2, and feeding the obtained manganese carbonate sinter with qualified particle size into a sinter tank 7-1; wherein the proportion of the sulfuric acid slag, the fine filter slag or the iron concentrate powder is determined according to the manganese-silicon alloy variety produced by smelting, the recovery rate of active ingredients and the manganese-iron ratio of manganese carbonate ore, the proportion of the dedusting ash is determined according to the collection amount and is generally 3-5%, and the proportion of the fuel is generally 6-10%; (3) putting the manganese carbonate sinter in a sinter pot 7-1, the silica pot 7-2, the ore pot 7-3, the high manganese slag pot 7-4 and the coke pot 7-5 into a second proportioning machine 5-2 according to certain weight, stirring, mixing and proportioning, then sending into an ore heating furnace 8 for smelting, and sending the obtained silicon-manganese alloy into a silicon-manganese alloy pot 9; (4) the manganese carbonate ore with unqualified particle size screened by the first screening machine 3-1 can be sent to the first crusher 2-1 again for crushing, and the manganese carbonate sinter with unqualified particle size screened by the second screening machine 3-2 can also be sent to the second crusher 2-2 again for crushing, so that the waste of materials is reduced, and the utilization rate of resources is improved.

Claims

1. A production line for producing silicomanganese alloy from manganese carbonate ore is characterized by comprising a manganese carbonate ore pit (1), a first crusher (2-1), a second crusher (2-2), a first screening machine (3-1), a second screening machine (3-2), an ore powder tank (4-1), a slag tank (4-2), a dust removal ash tank (4-3), a fuel tank (4-4), a first proportioning machine (5-1), a second proportioning machine (5-2), a belt type sintering machine (6), a sintering ore tank (7-1), a silica ore tank (7-2), an ore tank (7-3), a high manganese slag tank (7-4), a coke tank (7-5), an ore heating furnace (8) and a silicomanganese alloy tank (9);

the manganese carbonate pit (1) is connected with a feed inlet of a first crusher (2-1) through a hoister, a discharge port of the first crusher (2-1) is connected with a feed inlet of a first screening machine (3-1), a qualified material outlet of the first screening machine (3-1) is connected with a feed inlet of a mineral powder tank (4-1), discharge ports of the mineral powder tank (4-1), a slag tank (4-2), a dust removal ash tank (4-3) and a fuel tank (4-4) are all connected with a feed inlet of a first proportioning machine (5-1), a discharge port of the first proportioning machine (5-1) is connected with a feed inlet of a belt sintering machine (6), a discharge port of the belt sintering machine (6) is connected with a feed inlet of a second crusher (2-2), a discharge port of the second crusher (2-2) is connected with a feed inlet of the second screening machine (3-2), the qualified material outlet of the second screening machine (3-2) is connected with the feed inlet of a sintering ore tank (7-1), the discharge outlets of the sintering ore tank (7-1), a silica stone tank (7-2), an ore stone tank (7-3), a high manganese slag tank (7-4) and a coke tank (7-5) are connected with the feed inlet of a second proportioning machine (5-2), the discharge outlet of the second proportioning machine (5-2) is connected with the feed inlet of an ore heating furnace (8), and the discharge outlet of the ore heating furnace (8) is connected with the feed inlet of a silicon manganese alloy tank (9).

2. The production line of claim 1, wherein the slag pot (4-2) stores therein one of sulfuric acid slag, electrolytic manganese fine filter residue or iron fine powder.

3. A production line according to claim 1, characterized in that the ore tanks (7-3) have stored therein dolomite or fluorite.

4. A production line as claimed in claim 1, further comprising a first holding tank (10-1); the unqualified material outlet of the first screening machine (3-1) is connected with the feed inlet of the first temporary storage tank (10-1), and the discharge outlet of the first temporary storage tank (10-1) is connected with the feed inlet of the first crusher (2-1).

5. A production line as claimed in claim 1, characterized by further comprising a second holding tank (10-2); an unqualified material outlet of the second screening machine (3-2) is connected with a feed inlet of a second temporary storage tank (10-2), and a discharge outlet of the second temporary storage tank (10-2) is connected with a feed inlet of a second crusher (2-2).

6. The production line according to claim 1, characterized in that both the first batching machine (5-1) and the second batching machine (5-2) are internally provided with stirring means.

7. The production line of claim 1, characterized in that the tanks of said first dosing machine (5-1) and of said second dosing machine (5-2) are provided with gravity sensing means.

8. The production line according to claim 1, characterized in that the bodies of the manganese carbonate pits (1) are arranged underground.

9. A production line as claimed in claim 1, characterized by further comprising a belt conveyor (11); the first screening machine (3-1) is connected with the ore powder tank (4-1), the first proportioning machine (5-1) is connected with the strand sintering machine (6), the strand sintering machine (6) is connected with the second crusher (2-2), the second screening machine (3-2) is connected with the sinter ore tank (7-1), the second proportioning machine (5-2) is connected with the submerged arc furnace (8), and the submerged arc furnace (8) is connected with the silicon-manganese alloy tank (9) through belt conveyors (11).