CN202610256U

CN202610256U - Device utilizing bauxite or red mud for slag-free production

Info

Publication number: CN202610256U
Application number: CN2012202731648U
Authority: CN
Inventors: 胡长春; 胡晓雪
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-06-02
Filing date: 2012-06-02
Publication date: 2012-12-19
Anticipated expiration: 2022-06-02

Abstract

A device utilizing bauxite or red mud for slag-free production includes a rotary furnace and a smelting furnace, wherein a smoke outlet is arranged at the tail part of the rotary furnace, and the tail part of the smelting furnace is communicated with the head part of the rotary furnace; a hot molten iron outlet is arranged on the lower side of the head part of the smelting furnace, and a high-aluminum chamotte outlet is arranged on the upper side of the head part of the smelting furnace; and an alkali dissolving tank is arranged at the head of the smelting furnace and under the high-aluminum chamotte outlet. The utility model has the advantages that the device overcomes the problem that the blast furnace process of the prior art can't carry out slag discharging; alkali and sodium salt are obtained in the gravity dedusting chamber at the bottom of the waste heat boiler, so that the effect is greatly improved and the production cost is reduced; the red mud is reutilized to obtain the single substance iron, and the problems of land occupation and environmental pollution are solved; the device can separate and extract the alumina and iron in the needle-shaped aluminum and iron ore, which can't be obtained through Bayer process, sintering process and combination process; and as the whole production process achieves zero emission of solid, liquid and gas, the device achieves true low-carbon emission and is environment-friendly.

Description

A kind of bauxite or red mud of utilizing do not have the device that slag is produced

Technical field

The utility model belongs to the Metal smelting technical field, and being specifically related to a kind of bauxite or red mud of utilizing does not have the device that slag is produced.

Background technology

Utilize bauxite to extract aluminum oxide, bayer's process, sintering process, integrated process are conventional in the world at present production technique, though this technology is mature and stable, and the reliable row that is prone to, maximum defective is that it can produce a large amount of pollutents one red mud.The staple of red mud is: aluminum oxide 5%～25%; Red stone 30%～55%; Silicon oxide 5%～25%; Sodium oxide 3%～9%; Loss on ignition 10%～15%; Titanium oxide, Natural manganese dioxide, quicklime etc. 5%～10%.It is bigger that it generally contains the red stone amount, and outward appearance is similar with redness of the skin or complexion earth, thereby gains the name; The contaminative waste residue of discharging when it is Aluminium industry extraction aluminum oxide, its pH value is very high, and the pH value of leach liquor is 12.1～13.0.China is alumina producing big country, and the red mud of annual discharging is up to tens million of tons, and about seven, 80,000,000 tons of the annual red mud that produces in the whole world.Relevant industries are stored up it always, have both taken a large amount of soils, again soil, water source, atmosphere etc. are polluted.The sodium salt content safety range at water source is 30～400mg/L, and the sodium salt degree of wastewater from red mud is up to 26348mg/L, and the wastewater from red mud of high sodium salt degree like this gets into water body, and its pollution is self-evident.For solving this difficult problem; People once attempted to use blast furnace process, magnetic method (comprising the superconducting magnetic separation method) or flotation process; Extract the iron in the red mud, " digestion " red mud of storing up in a large number by this, still; Because the iron in the red mud exists with states such as deep oxidation iron, molysite, so magnetic method (comprising the superconducting magnetic separation method), gravity separation method or flotation process can't be extracted iron wherein at all; And blast furnace process, because wherein contain more a large amount of aluminium, titanium and compound thereof, and since the unusual thickness of these materials, the carrying out that has not only stoped the gas-solid liquid phase reaction in the blast furnace, and make that blast furnace " scum " can not; Though can mix a large amount of calcium containing compounds to solve " thickness " problem, just increased production cost greatly, there has not been benefit basically, lost practicality, so no longer be used.

Moreover the aluminum oxide in the needle-like ferro-aluminum ore deposit all can not be separated, extracted to " Bayer process ", " sintering process ", " integrated process " in the existing process for making alumina; Alumina content in this part raw material is also higher, have up to more than 30%, all be used as waste material and enter in the slag, caused the significant wastage of resource.

The utility model content

The technical problem that the utility model will solve is: overcome the deficiency of prior art, providing a kind of can separate each element in bauxite and the red mud and utilization, running cost is low, economic benefit is high utilizes bauxite or red mud not to have the device that slag is produced fully.

The utility model solves the technical scheme that its technical problem adopted: a kind of bauxite or red mud of utilizing do not have the device that slag is produced; Comprise rotary kiln; Said rotary kiln afterbody is provided with exhanst gas outlet; It is characterized in that: also comprise a molten stove that divides, the stove afterbody was communicated with said rotary kiln head in said molten minute; Said molten minute furnace head downside is provided with heating molten steel outlet, and said molten minute furnace head upside is provided with high alumina outlet; Said heating molten steel outlet is lower than said high alumina outlet;

Below said molten minute furnace head, said high alumina export, be provided with the alkali dissolution groove.

Preferably, said molten minute stove is communicated with said rotary kiln through an enclosed passage.

Preferably, at said molten minute furnace head the gas gun more than is installed, the muzzle of said gas gun was towards said molten minute stove afterbody.

Preferably, above the outlet of said high alumina, be provided with at least one plasma gun, the muzzle of said plasma gun vertically downward, the high alumina of heating.

Preferably, at said molten minute stove afterbody the gas gun more than is installed, the muzzle of said gas gun is towards blanking place of said molten minute stove afterbody.

Preferably, the exhanst gas outlet of said rotary kiln is communicated with a water curtain dedusting alkali absorption tower through a waste heat boiler.

Preferably, said molten minute furnace head, afterbody are respectively installed four gas guns.

Preferably, be provided with three plasma guns above the said high alumina outlet.

Compared with prior art, the beneficial effect of the utility model is: it can solve blast furnace process in the prior art " scum " can not problem; Gravitational dust collection chamber bottom the waste heat boiler of rotary kiln afterbody UNICOM obtains alkali and sodium salt, increases the benefit, reduced production cost greatly; To make deleterious red mud resource utilization, obtain fe, solve red mud occupation of land, problem of environment pollution caused; The utility model can separate, extract aluminum oxide and the iron in the needle-like ferro-aluminum ore deposit, and the institute that has solved " Bayer process ", " sintering process ", " integrated process " can not; Whole process of production reaches the solid zero release, liquid zero emission, gas qualified discharge, real low-carbon emission, environmental protection.Thereby realized separation and utilization, realized the effect that pyrogenic process separates alkali each element in bauxite and the red mud.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment.

Be labeled as among the figure:

1, rotary kiln; 11, exhanst gas outlet; 12, waste heat boiler; 13, water curtain dedusting alkali absorption tower; 2, the molten stove that divides; 21, heating molten steel outlet; 22, high alumina outlet; 23, gas gun; 24, plasma gun; 3, alkali dissolution groove; 4, enclosed passage.

Embodiment

Below in conjunction with accompanying drawing embodiment, the utility model done further describing:

High alumina is the mixture that contains light metals such as aluminum oxide, silicon-dioxide, quicklime, titanium oxide, Natural manganese dioxide; Enclosed passage is built into by refractory materials.

Embodiment

As shown in Figure 1; During installation; Rotary kiln 1, a molten stove 2, the residing position of alkali dissolution groove 3 threes divided reduce successively, and their each own heads or bottom are all low with respect to the height on its afterbody or top, that is: the head of rotary kiln 1 is lower slightly than its afterbody; The molten afterbody of stove 2 that divides is lower than the head of rotary kiln 1, but is higher than the molten head that divides stove 2; The top of alkali dissolution groove 3 is lower than the molten head that divides stove 2, but is higher than the bottom of alkali dissolution groove 3.

Referring to Fig. 1, a kind of bauxite or red mud of utilizing do not have the device that slag is produced, and comprises rotary kiln 1, molten stove 2, the enclosed passage 4 of dividing, and stove 2 was communicated with said rotary kiln 1 through said enclosed passage 4 in said molten minute; Said rotary kiln 1 afterbody is provided with exhanst gas outlet 11, and said molten minute stove 2 head downsides are provided with heating molten steel outlet 21, and said molten minute stove 2 head upsides are provided with high alumina outlet 22; Said heating molten steel outlet 21 is lower than said high alumina outlet 22; Stove 2 heads were equipped with four gas guns 23 in said molten minute, and the muzzle of said gas gun 23 was towards said molten minute stove 2 afterbodys; Stove 2 afterbodys were equipped with four gas guns 23 in said molten minute, and the muzzle of said gas gun 23 is towards blanking place of said molten minute stove 2 afterbodys;

Above said high alumina outlet 22, be provided with three plasma guns 24, the muzzle of said plasma gun 24 vertically downward, the high alumina of heating; Export below 22 at said molten minute stove 2 head, said high alumina, be provided with alkali dissolution groove 3; The exhanst gas outlet 11 of said rotary kiln 1 is communicated with waste heat boiler 12, is communicated with a water curtain dedusting alkali absorption tower 13 again; Waste heat boiler 12 bottoms are provided with the gravitational dust collection chamber, are used to collect alkali, sodium (potassium) salt.

The principle of work and the working process of the utility model are following:

As shown in Figure 1, according to 1: 0.05～0.25: 0.2～0.5 weight percent, get bauxite or red mud, lime, coal, they are mixed, process mixed raw material; Mixed raw material is joined in the rotary kiln 1, and the temperature in the rotary kiln 1 from the afterbody to the head edges up to 1460 degree from 800 degree Celsius; Through 2～10 hours oven dry, prereduction, generate the reducing material that is the semi-melting state; With the discharge port of reducing material, enter into molten the branch in the stove 2 through enclosed passage 4 by rotary kiln 1; Head, afterbody at said molten minute stove 2 are installed the gas gun 23 more than respectively, and the muzzle of all gas guns 23 all divides stove 2 afterbodys or its blanking place towards molten, to reducing material heat, fusion; Melt and divide stove 2 interior temperature at 1450～1700 degree Celsius, reducing material through 1～4 hour hour, carries out fusion in molten branch stove 2, slag iron separates;

The high alumina on upper strata is discharged by high alumina outlet 22, and the heating molten steel of lower floor is flowed out by heating molten steel outlet 21; High alumina exports the plasma gun more than of 22 tops, and the high alumina that is about to discharge is heated; High alumina gets into alkali dissolution groove 3, is provided with a whisking appliance in the alkali dissolution groove 3, and fills an amount of alkaline solution; Through stirring, solid-liquid separation, obtain sodium aluminate solution and solid silicon, calcium, magnesium, titanium light metal oxide compound; Flue gas from the exhanst gas outlet 11 of rotary kiln 1 afterbody gives off obtains hot steam behind waste heat boiler 12, obtain alkali, sodium (potassium) salt by the gravitational dust collection chamber of waste heat boiler 12 bottoms; Again via water curtain dedusting alkali absorption tower 13; Absorb waste gas such as sulfur in smoke, fluorine, arsenic further; Make it to be dissolved in alkali and generate water-soluble sodium potassium) salt, promptly generate the mixing liquid of S-WAT (potassium), Sodium Fluoride (potassium), Sodium Silicofluoride 98min (potassium), sodium arseniate (potassium) and yellow soda ash (potassium).

The above; It only is the preferred embodiment of the utility model; Be not to be the restriction of the utility model being made other form, any professional and technical personnel of being familiar with possibly utilize the technology contents of above-mentioned announcement to change or be modified as the equivalent embodiment of equivalent variations.But every the utility model technical scheme content that do not break away to any simple modification, equivalent variations and remodeling that above embodiment did, still belongs to the protection domain of the utility model technical scheme according to the technical spirit of the utility model.

Claims

1. one kind is utilized bauxite or red mud not to have the device that slag is produced, and comprises rotary kiln, and said rotary kiln afterbody is provided with exhanst gas outlet, it is characterized in that: also comprise a molten stove that divides, the stove afterbody was communicated with said rotary kiln head in said molten minute; Said molten minute furnace head downside is provided with heating molten steel outlet, and said molten minute furnace head upside is provided with high alumina outlet; Said heating molten steel outlet is lower than said high alumina outlet;

2. bauxite or the red mud of utilizing according to claim 1 do not have the device that slag is produced, and it is characterized in that: stove was communicated with said rotary kiln through an enclosed passage in said molten minute.

3. bauxite or the red mud of utilizing according to claim 2 do not have the device that slag is produced, and it is characterized in that: at said molten minute furnace head the gas gun more than is installed, the muzzle of said gas gun was towards said molten minute stove afterbody.

4. there is not the device that slag is produced according to arbitrary described bauxite or the red mud of utilizing of claim 1 to 3; It is characterized in that: above said high alumina outlet; Be provided with at least one plasma gun, the muzzle of said plasma gun vertically downward, the high alumina of heating.

5. bauxite or the red mud of utilizing according to claim 4 do not have the device that slag is produced, and it is characterized in that: at said molten minute stove afterbody the gas gun more than is installed, the muzzle of said gas gun is towards blanking place of said molten minute stove afterbody.

6. bauxite or the red mud of utilizing according to claim 5 do not have the device that slag is produced, and it is characterized in that: the exhanst gas outlet of said rotary kiln is communicated with a water curtain dedusting alkali absorption tower through a waste heat boiler.

7. bauxite or the red mud of utilizing according to claim 6 do not have the device that slag is produced, and it is characterized in that: furnace head, afterbody were respectively installed four gas guns in said molten minute.

8. bauxite or the red mud of utilizing according to claim 7 do not have the device that slag is produced, and it is characterized in that: said high alumina outlet top is provided with three plasma guns.