CN214095497U

CN214095497U - Rotary negative pressure roasting furnace for producing basic zinc carbonate

Info

Publication number: CN214095497U
Application number: CN202022956054.9U
Authority: CN
Inventors: 季人杰; 苏燕; 季闻华
Original assignee: Taicang Hengze Technology Co Ltd
Current assignee: Taicang Hengze Technology Co Ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-08-31
Anticipated expiration: 2030-12-09

Abstract

The utility model belongs to the field of chemical raw material processing, and particularly discloses a rotary negative pressure roasting furnace for producing basic zinc carbonate, which comprises a furnace chamber, a feeding port, a discharging port, a finished product chamber, an electric heating rod, a middle reaction chamber, an air inlet, a fan, a furnace door, a side reaction chamber and a furnace wall; the feeding port is arranged above the furnace chamber, and the discharging port is arranged in the finished product cavity below the furnace chamber; the gas inlet is used for blowing nitrogen to prevent the oxidation reaction of the internal zinc compound; the electric heating rod can drive the middle reaction cavity to rotate around the shaft; the fan continuously discharges gas when the furnace body runs, the internal air pressure is kept slightly lower than one atmospheric pressure, so that the stable air flow can be kept in the furnace body for a long time, gas impurities in the product are discharged, and the purity of the finished product is improved; the utility model discloses two kinds of reaction positions in well reaction chamber and the side reaction chamber still are equipped with: the middle reaction cavity is separated by a clapboard provided with holes, and the temperature at the position is higher; the side reaction cavity has low temperature and low rotating speed, and is suitable for surface roasting or drying.

Description

Rotary negative pressure roasting furnace for producing basic zinc carbonate

Technical Field

The utility model belongs to the chemical industry raw materials processing field specifically discloses a rotation negative pressure roasting furnace for production of basic zinc carbonate.

Background

In the prior art, the primary purification method of various ore raw materials is to add a proper catalyst for roasting; in the preparation of basic zinc carbonate, either zinc carbonate or zinc hydroxide is prepared by a roasting step.

The basic zinc carbonate in the present stage is prepared by the following steps:

1. adding sulfuric acid and ammonium bicarbonate into zinc-containing raw ore to prepare zinc sulfate;

2. introducing hydrogen peroxide and air to oxidize ferrous iron into ferric iron;

3. adding excessive sulfuric acid again to prepare ferric sulfate;

4. adding zinc for replacement;

5. filtering;

6. adding potassium permanganate for oxidation;

7. carbon dioxide double decomposition and carbonization are blown in.

Roasting has several purposes including mineral oxidation, unnecessary moisture removal, lump change of powdery material, etc. depending on the material properties and the differences of subsequent processing methods, in the preparation of basic zinc carbonate, roasting is mainly used for oxidizing zinc raw ore into zinc oxide to prepare intermediate products of zinc carbonate and zinc hydroxide; sulfating roasting, i.e. a roasting process using sulfur dioxide as a reactant, and alkaline roasting, i.e. a roasting process using alkaline substances such as soda ash, caustic soda or limestone as a reactant, are usually adopted; the conventional roasting furnace has a single function, namely, the interior of the furnace body is fumigated at a constant temperature lower than the melting point of a substance by burning the furnace body for a long time, the air in the furnace body is not easy to exhaust, the reactant is easy to oxidize in a high-temperature atmosphere, and a semi-finished product is inconvenient to collect.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model discloses a rotary negative pressure roasting furnace for producing basic zinc carbonate;

the technical scheme of the utility model as follows:

a rotary negative pressure roasting furnace for producing basic zinc carbonate is characterized in that: comprises a furnace chamber, a feeding port, a discharging port, a finished product chamber, an electric heating rod, a middle reaction chamber, an air inlet, a fan, a furnace door, a side rod rotating shaft, a side rod, a side reaction chamber and a furnace wall; the feeding port is arranged above the furnace chamber; the discharge port is arranged in the finished product cavity below the furnace cavity; the upper part of the electric heating rod is connected with the upper part of the furnace chamber and can rotate around a shaft; the middle reaction cavity is fixedly connected around the electric heating rod; the air inlet is arranged below one side of the furnace chamber; the fan is arranged above one side of the furnace chamber and forms an angle with the air inlet; a furnace door is arranged on one side of the furnace wall and can be opened outwards along the side axis; two side rods are arranged at the non-central position in the furnace cavity; the side rods are connected with the lower part of the furnace chamber through side rod rotating shafts; and a plurality of side reaction cavities are arranged on the side rods.

Further, a screening device is arranged above the feeding port, and the screening particle size of the screening device is not more than 4 cm; as the utility model discloses a preferred, too big granule can lead to the calcination to make the inside and outside difference in temperature too big, and inside still moist outside is then heated excessively, influences the product quality.

Furthermore, the middle reaction cavity is pentagonal and comprises five material placing barrels and partition plates arranged among the material placing barrels; the partition board is provided with a hole of 0.5 cm; as one optimization of the utility model, for the zinc compound with larger particles, the roasting efficiency is higher at high temperature; for smaller particle zinc compounds, the zinc compounds can be placed in a side reaction cavity for roasting due to quick drying; for the small particles formed after roasting, the small particles can pass through the holes and are thrown to the outermost periphery of the middle reaction cavity under the action of centrifugal force, so that the heated temperature of the small particles is lower.

Further, the gas inlet is connected with a nitrogen valve, and nitrogen is continuously blown in when the furnace body runs; as the utility model discloses a preferred, begin to bubble nitrogen gas before the furnace body starts, continuously bubble nitrogen gas after the furnace body reaction to the inside air of evacuation prevents zinc compound oxidation.

Further, the wind direction of the fan is outward; as a preference of the utility model, the internal air pressure is kept lower than one atmosphere when the machine body operates, and a large amount of data shows that the reaction rate of the zinc compound is higher under the negative pressure condition.

Further, the side lever rotating shaft is connected with two ends of the discharge hole; an annular rotating shaft is arranged below the furnace chamber; the side lever rotating shaft is connected to the annular rotating shaft; as an optimization of the utility model, the side lever keeps rotating around the annular rotating shaft when the machine body operates, which is beneficial to improving the roasting efficiency.

Further, the side reaction cavity is a ceramic solid bowl-shaped vessel; as the utility model discloses an it is preferred, to the zinc raw ore or the powdered semi-finished product material of less granule, it keeps away from the electric heat pole, is heated less both can accomplish the calcination, has both improved the work efficiency of furnace body, also can prevent that powdered material from reacting for a long time.

Above-mentioned technical scheme can find out, the utility model discloses following beneficial effect has:

the utility model discloses a rotary negative pressure roasting furnace for producing basic zinc carbonate, which adopts a rotary furnace body to keep inner coils, so that the roasting of each surface is uniform, and the roasting efficiency is improved;

the utility model discloses a rotary negative pressure roasting furnace for basic zinc carbonate production, which adopts a negative pressure nitrogen environment according to the existing basic zinc carbonate production experience, and can effectively improve the yield;

a rotation negative pressure roasting furnace for production of basic zinc carbonate, set up different reaction position to the raw ore or the semi-manufactured goods material of different particle diameters to adapt to its required reaction temperature, make full use of inside heat.

Drawings

FIG. 1 is a schematic view of a rotary negative pressure roasting furnace for producing basic zinc carbonate according to

embodiments

1 and 2 of the present invention;

FIG. 2 is a schematic view of a reaction chamber in a rotary negative pressure roasting furnace for producing basic zinc carbonate according to embodiment 2 of the present invention;

in the figure: 1. the furnace comprises a furnace chamber, a material inlet 2, a material outlet 3, a finished product chamber 4, an electric heating rod 5, a middle reaction chamber 6, a material placing barrel 61, a clapboard 62, a gas inlet 7, a fan 8, a furnace door 9, a side rod rotating shaft 10, a side rod 11, a side reaction chamber 12 and a furnace wall 13.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example 1

As shown in fig. 1, the rotary negative pressure roasting furnace for producing basic zinc carbonate comprises a furnace chamber 1, a feeding port 2, a discharging port 3, a finished product chamber 4, an electric heating rod 5, a middle reaction chamber 6, an air inlet 7, a fan 8, a furnace door 9, a side rod rotating shaft 10, a side rod 11, a side reaction chamber 12 and a furnace wall 13; the feeding port 2 is arranged above the furnace chamber 1; the discharge port 3 is arranged in the finished product cavity 4 below the furnace cavity 2; the upper part of the electric heating rod 5 is connected with the upper part of the furnace chamber 1 and can rotate around a shaft; the middle reaction cavity 6 is fixedly connected around the electric heating rod 5; the air inlet 7 is arranged below one side of the furnace chamber 1; the fan 8 is arranged above one side of the furnace chamber 1 and forms an angle of 180 degrees with the air inlet 7; one side of the furnace wall 13 is provided with a furnace door 9, and the furnace door 9 can be opened outwards along a side shaft; two side rods 11 are further arranged at non-central positions in the furnace chamber 1; the side bar 11 is connected with the lower part of the furnace chamber 1 through a side bar rotating shaft 10; a plurality of side reaction cavities 12 are arranged on the side rods 11.

In use, the zinc containing mixture to be calcined is placed in a furnace chamber 1, wherein: the large particles are placed in the middle reaction cavity 6, and the small particles are placed in the side reaction cavity 12; blowing nitrogen from an air inlet 7; after nitrogen is fully blown in, the roasting furnace is started to enable the middle reaction cavity 6 and the side reaction cavity 12 to rotate around the shaft; after heating for a short time, starting the fan 8 to keep the internal negative pressure; and taking out the finished product from the discharge port 3 after roasting.

Example 2

As shown in fig. 1 and 2, a rotary negative pressure roasting furnace for producing basic zinc carbonate comprises a furnace chamber 1, a feeding port 2, a discharging port 3, a finished product chamber 4, an electric heating rod 5, a middle reaction chamber 6, an air inlet 7, a fan 8, a furnace door 9, a side rod rotating shaft 10, a side rod 11, a side reaction chamber 12 and a furnace wall 13; the feeding port 2 is arranged above the furnace chamber 1; the discharge port 3 is arranged in the finished product cavity 4 below the furnace cavity 1; the upper part of the electric heating rod 5 is connected with the upper part of the furnace chamber 1 and can rotate around a shaft; the middle reaction cavity 6 is fixedly connected around the electric heating rod 5; the air inlet 7 is arranged below one side of the furnace chamber 1; the fan 8 is arranged above one side of the furnace chamber 1 and forms an angle of 180 degrees with the air inlet 7; one side of the furnace wall 13 is provided with a furnace door 9, and the furnace door 9 can be opened outwards along a side shaft; two side rods 11 are further arranged at non-central positions in the furnace chamber 1; the side bar 11 is connected with the lower part of the furnace chamber 1 through a side bar rotating shaft 10; a plurality of side reaction cavities 12 are arranged on the side rods 11.

Preferably, a screening device is arranged above the feeding port 2, and the screening particle size of the screening device is not more than 4 cm.

Preferably, the middle reaction chamber 6 is pentagonal and comprises five material placing cylinders 61 and partition plates 62 arranged among the material placing cylinders 61; the partition plate 62 is provided with a hole of 0.5 cm.

Preferably, the gas inlet 7 is connected with a nitrogen gas valve, and nitrogen gas is continuously blown in when the furnace body runs.

Preferably, the wind direction of the fan 8 is outward.

Preferably, the side rod rotating shaft 10 is connected with two ends of the discharge hole 3; an annular rotating shaft is arranged below the furnace chamber 1; the side bar rotating shafts 10 are connected to the annular rotating shaft.

Preferably, the side reaction chamber 12 is a ceramic solid bowl.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention can not be limited thereby, and the simple equivalent changes and modifications made according to the claims and the utility model also belong to the protection scope of the present invention.

Claims

1. A rotary negative pressure roasting furnace for producing basic zinc carbonate is characterized in that: comprises a furnace chamber (1), a feeding port (2), a discharging port (3), a finished product chamber (4), an electric heating rod (5), a middle reaction chamber (6), an air inlet (7), a fan (8), a furnace door (9), a side lever rotating shaft (10), a side lever (11), a side reaction chamber (12) and a furnace wall (13); the feeding port (2) is arranged above the furnace chamber (1); the discharge hole (3) is arranged in a finished product cavity (4) below the furnace cavity (1); the upper part of the electric heating rod (5) is connected with the upper part of the furnace chamber (1) and can rotate around a shaft; the middle reaction cavity (6) is fixedly connected around the electric heating rod (5); the air inlet (7) is arranged below one side of the furnace chamber (1); the fan (8) is arranged above one side of the furnace chamber (1) and forms an angle of 180 degrees with the air inlet (7); one side of the furnace wall (13) is provided with a furnace door (9), and the furnace door (9) can be opened outwards along the side shaft; two side rods (11) are arranged at non-central positions in the furnace chamber (1); the side rod (11) is connected with the lower part of the furnace chamber (1) through a side rod rotating shaft (10); a plurality of side reaction cavities (12) are arranged on the side rods (11).

2. The rotary negative pressure roasting furnace for producing basic zinc carbonate according to claim 1, characterized in that: and a screening device is arranged above the feeding port (2), and the screening particle size of the screening device is not more than 4 cm.

3. The rotary negative pressure roasting furnace for producing basic zinc carbonate according to claim 1, characterized in that: the middle reaction cavity (6) is pentagonal and comprises five material placing barrels (61) and partition plates (62) arranged among the material placing barrels (61); and a hole of 0.5cm is formed in the partition plate (62).

4. The rotary negative pressure roasting furnace for producing basic zinc carbonate according to claim 1, characterized in that: and the gas inlet (7) is connected with a nitrogen valve, and nitrogen is continuously blown in when the furnace body runs.

5. The rotary negative pressure roasting furnace for producing basic zinc carbonate according to claim 1, characterized in that: the wind direction of the fan (8) is outward.

6. The rotary negative pressure roasting furnace for producing basic zinc carbonate according to claim 1, characterized in that: the side rod rotating shaft (10) is connected with two ends of the discharge hole (3); an annular rotating shaft is arranged below the furnace chamber (1); the side bar rotating shaft (10) is connected to the annular rotating shaft.

7. The rotary negative pressure roasting furnace for producing basic zinc carbonate according to claim 1, characterized in that: the side reaction cavity (12) is a ceramic solid bowl-shaped vessel.