JP2003010824A - Heating and processing method and apparatus therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating and processing method capable of obtaining a carbide and an activated carbon which do not contain a harmful material and an organic substance, and to provide a apparatus therefor. SOLUTION: The apparatus introduces the material obtained by the thermal decomposition by the thermal decomposition means into a carbide processing furnace 36 using a conveying means 34, 35. The material is processed depending on its purpose into carbide an activated carbon or an ashed material. The treatment furnace 36 is composed of a rotary furnace 37 and the rotary furnace is provided with a rotary conveyance means 52 therein. A charging jacket 42 and a combustion burner 43 to ignite and burn the carbide are installed at the upstream side of the rotary furnace 37. A discharging jacket 45 is installed at the downstream side of the discharge side of the carbide and the activated carbon. A discharging apparatus 56 employing an on-off valve 55a, 55b is installed at the lower part side of the discharging jacket 45. The carbide and the activated carbon are discharged intermittently by the discharging apparatus 56. Also, the invasion of air to the rotary furnace 37 is controlled by the apparatus, and the carbide or the activated carbon processing is surely conducted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating processing method and a processing apparatus for heating a residue containing a carbide produced by thermal decomposition to obtain a carbide, activated carbon and ash. Is.

[0002]

2. Description of the Related Art As substances to be treated that generate harmful substances by heating, various organic substances containing organic substances (animal type, plant type, fish and shell type, food processing residue, various sludges, etc.) and nitrogen are included. When plastics (nylon, ABS resin, urea resin, aretane, etc.) are burned, various nitrogen compounds are produced depending on the burning conditions.

For example, in the above-mentioned cases, when the combustion temperature is low and incomplete combustion occurs, highly poisonous hydrogen cyanide and carbon monoxide are produced. In addition, since plastics particularly contain a chlorine component, it is generally known that in addition to generating harmful hydrogen chloride, further harmful dioxin is generated due to this.

Recently, attention has been paid to measures against dioxins, but it must be remembered to take measures to remove harmful substances such as heavy metals such as cyanide compounds and organic chlorine compounds, which has been a problem in the past.

Further, in the event of a fire, in addition to the risk of dioxins being produced from plastics, nitrogen-containing plastics (curtains, carpets, mattresses) are incompletely burned, and toxic gases such as hydrogen cyanide are generated. It is also known to die from gas poisoning. Of course, dioxins and cyan compounds also produce various harmful substances.

In view of the above, when heat-treating an object to be treated such as waste, incineration is performed and various proposals as shown below are made regarding combustion conditions at that time. ing.

(1) Japanese Unexamined Patent Publication (Kokai) No. 6-23396 A cyanide-containing sludge is treated at 800 to 900 in an incinerator.
It is necessary to heat the cyan compound to N ₂ and CO ₂ by heating at a temperature of ℃ or more, but this is not easy. Therefore, instead of incineration, a means for detoxifying sludge by adding an oxidizing agent under alkaline conditions to elute the cyanide compound, and performing landfill treatment is used.

(2) When Japanese Patent Laid-Open No. 143510/1992 (waste containing amino acids, such as soy sauce cake) is simply incinerated, partial air shortage (oxygen shortage) occurs. Under such combustion conditions, a toxic cyanide compound is by-produced from the nitrogen (N) content contained in the object to be treated.

Therefore, the incineration temperature is set to a high temperature of 950 ° C. or higher, and an oxygen-rich state is set so that oxygen deficiency does not occur, and complete combustion is performed.

(3) Japanese Unexamined Patent Publication (Kokai) No. 6-193851 A technical idea similar to that in Japanese Unexamined Patent Publication No. 4-143510 (4) Japanese Unexamined Patent Publication No. 54-86976 When burning nitrogen-containing organic matter (various sludges) Occur. The higher the oxygen concentration, the less the amount of cyanide generated, and the cyanide can be removed by secondary combustion at 700 ° C or higher.

[0011]

As described above, various treatments are performed by heating and incinerating an object to be treated such as waste, and regarding the combustion conditions at that time, the treatment amount, the temperature condition, The production of harmful substances is suppressed by combustion by controlling the amount of oxygen and the like.

[0012] For example, although harmful substances in the exhaust gas can be removed by secondary combustion of the exhaust gas generated by incineration at a predetermined temperature and residence time, in the case of incineration, the situation of incomplete combustion can be completely eliminated. It is difficult.

Therefore, it is highly possible that heavy substances such as dioxins and cyan compounds and harmful substances such as organic chlorine compounds remain in the incineration residue (ash, incomplete combustion residue, etc.). The reason is that it is difficult to control combustion, and it is difficult to perform the incineration process as a whole stably.

The present invention has been made in view of the above circumstances, and a residue containing a carbide produced after pyrolysis by indirect heating is further heat-treated to contain a harmful substance or an organic substance. It is an object of the present invention to provide a heat processing method and a processing apparatus capable of obtaining non-carbide, activated carbon and ash.

[0015]

In the present invention, first, an object to be treated is subjected to 450 to 500 by a pretreatment step of a carbide treating method.
After primary carbonization at ℃, depending on the properties of the starting material, the purpose and form of use, multi-purpose treatment, (1) heavy metals (alkyl mercury compounds, mercury or its compounds, cadmium or its compounds, lead or its compounds, If arsenic or its compound, hexavalent chromium compound, organophosphorus compound, cyanide compound, etc.) is above the regulation value, it cannot be used as a carbide, so it should be reduced to ash to be disposed of in landfill (2 ) Although it contains harmful substances (organic chlorine compounds), etc., it is a component that can be removed by heating and wants to be removed, and (3) Hazardous substances are below regulated values, and organic substances must be completely removed and used. , (4) Hazardous substances are below regulated values, and we want to use them as activated carbon.

Therefore, in the present invention, the primary carbide obtained in the pretreatment step is further heated and burned at a higher temperature (600 to 800 ° C.) to be treated to ash instead of the carbide, and further carbonized to carry out organic matter. And harmful substances were removed, and the activated carbon was activated to make it more porous to obtain activated carbon.

As described above, if the object to be treated is directly burned as it is, it is difficult to control temperature, time, etc., so that various harmful substances tend to be easily produced.

However, if the object to be treated is treated by indirect heating, the organic substances and volatile harmful substances (VOC, etc.) contained therein are decomposed and deposited, and the amount of these components remaining decreases. That is, it means that the primary processing is performed.

In the case of thermal decomposition by indirect heating, stable thermal decomposition treatment can be performed because heating control is easy, but some harmful substances tend to remain in the residue.

Therefore, it was noted that the residue containing the carbonized material which was carbonized by the indirect heating can be decomposed and removed by burning the residue in the individual incinerator, that is, by directly heating the organic material and the harmful substance contained in the residue. In addition, it was also found that the activated carbon was further made porous to become activated carbon.

Therefore, in order to achieve the above object, the present invention thermally decomposes an object to be treated containing an organic substance by indirect heating, and further heat-treats the obtained residue containing carbide. In this method, after the residue containing carbides is put into a rotary kiln equipped with a conveying means inside, the residue is ignited by a combustion burner to remove the volatile components contained in the residue. It is characterized in that it is moved while being treated to promote carbonization.

A: The carbonization promoting treatment as described above is performed as follows.

(A) The air necessary for the combustion burner in the rotary kiln is introduced, but the inflow of air into the rotary kiln is restricted so that the residue does not become burnable air. In particular, the discharge part has a discharge structure with a double opening / closing valve to limit air invasion from this part. As a result, although a part of the residue is burned, the combustion of the residue is limited and the organic matter is decomposed and removed.

(B) The combustion temperature of the combustion burner is set to 800 ° C. and heated. A part of the residue is burned by this.
The residue, which is sequentially supplied by the self-combustion of the residue itself by the high temperature atmosphere, is heated and self-combusts.

(C) Since the amount of air in the atmosphere is limited, the entire residue is not burned, but the organic matter contained,
And volatile toxic substances burn. If the residue self-combusts, the combustion burner stops and the introduced air is limited.

B: A method of thermally decomposing an object to be treated containing an organic substance by indirect heating, and further subjecting the residue containing the obtained carbide to heat treatment to process the residue. After the residue is put into a rotary kiln equipped with a transfer means inside, the residue is ignited by a combustion burner to remove the volatile components contained in the residue, and the residue is moved during activation treatment to activate carbonization. It is characterized by processing.

The above-mentioned action of the activated carbonization is carried out as described in the above (a) to (c), and the activated carbon is generated. However, since it is a low-grade activated carbon due to its large specific surface area, it can be activated by introducing steam, for example, to make it a high-grade (high specific surface area) activated carbon. (Various means have been introduced and proposed as activation means) C: Further, the object containing the organic substance is thermally decomposed by indirect heating, and the residue containing the obtained carbide is further heated. A method of treating and processing, in which the residue containing carbide is put into a rotary kiln equipped with a conveying means inside, and then the residue is ignited by a combustion burner and moved while burning to be incinerated. It is characterized by doing.

The residue that has not been ashed in the rotary kiln is burned on the grate. If necessary, on the stove,
Combustion secondary air is introduced from below.

In addition to the above heat processing method, the present invention can configure the following heat processing apparatus in order to achieve the above object.

First of all, a rotary kiln having a conveying means protruding in a spiral shape or a spline shape inside thereof, a treatment object charging means and a combustion means provided on one end side of the rotary kiln, and the other end of the rotary kiln. And a workpiece take-out means provided on the side.

Next, an inclined rotary kiln, a workpiece introducing means and a combustion means provided on the upper inclined side of the rotary kiln, and a workpiece removing means provided on the lower inclined side of the rotary kiln. It is characterized by being equipped.

Further, a rotary kiln having a conveying means projecting in a spiral or spline shape therein, means for obliquely arranging the rotary kiln, and an object to be processed provided on the upper side of the oblique inclination of the obliquely arranged rotary kiln. Charging means and combustion means,
It is characterized in that the rotary kiln is provided with a workpiece take-out means provided on the lower side of the inclination of the rotary kiln.

Further, the inner wall of the rotary kiln is characterized by being covered with a refractory material, and the conveying means is constituted by a protruding refractory material.

[0034]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a conceptual diagram of a thermal decomposition treatment facility showing a first embodiment of the present invention, and is a first embodiment in the case where decomposition containers equipped with screw-type stirring and conveying means are stacked in two stages.

In FIG. 1, reference numeral 10 is a charging means for charging an object to be processed, which comprises a hopper 11 and a conveying means 12 composed of a screw conveyor driven by a motor M.

Reference numeral 20 denotes a thermal decomposition means for heating and thermally decomposing an object to be treated, and the thermal decomposition means 20 is arranged vertically.
It consists of two decomposition containers 21 and 22, and the upper decomposition container 2
The material to be treated is introduced from the supply port 21a at one end of the No. 1 and is transferred to the discharge port 21c while being stirred by the transfer means 21b
The decomposition container 22 is carried into the lower decomposition container 22 through the flexible joint 23 from its supply port 22a, and the conveying means 2 of the decomposition container 22 is introduced.
It is configured to be transferred to the discharge port 22c while being agitated by 2b and to discharge the processed product from the discharge port 22c. The conveying means 21b and 22b are composed of screws or spiral conveyors, and have motors M ₁ and M ₂ respectively.
It is driven to rotate.

The decomposition vessels 21 and 22 are heated by external heating means. This external heating means partitions the heating jacket HJ that covers the entire decomposition vessels 21 and 22 with partition plates 24 and 26 to form hot air gas chambers 21d and 22d that separately surround the decomposition vessels 21 and 22, respectively. Are communicated with each other through a communication port 25 provided on one end side of the partition plate 24.

Further, the combustion furnace 30 provided in the lower part of the decomposition vessel 22 introduces the combustion gas (dry distillation gas) generated during the heat treatment in the decomposition vessels 21 and 22 through the dry distillation gas conduit 27 and burns it.

Reference numeral 31 is a combustion burner for heating the combustion furnace 30, which burns fuel to raise the temperature of the combustion furnace 30 to a predetermined temperature or higher, and burns decomposed gas to render it harmless. To introduce the cracked gas into the combustion furnace 30, the circulating blower 32 is used to draw the cracked gas into the combustion furnace 30 from the nozzle 33.

The treated material (carbide) obtained by the thermal decomposition by the thermal decomposition means 20 is introduced into the carbide processing furnace 36 by using the conveying means 34, 35 such as a pipe conveyor connected to the discharge port 21c of the decomposition container 22. The processed product is processed here according to the purpose (carbonization, activated carbon, ashing). In addition, in the case of ashing (second mode), the moving speed of the residue is made slower than in carbonization and activated carbonization (first mode).

The carbide processing furnace 36 comprises a rotary furnace 37, as shown in detail in FIG. Rotary furnace 37
Is made of a tubular steel material, and a fire resistant / heat resistant layer 38 of castable material is provided inside the tubular steel material. The rotary furnace 37 has rotary rollers 3 on both ends in the axial direction.
It is supported by 9, 40, and is provided at its central portion with a means rotated by a drive source 41 composed of a motor M.

The rotary furnace 37 is constructed so as to be inclined by 2 to 3 degrees in the traveling direction so that it can be naturally conveyed. Inside the rotary furnace 37, as shown in FIGS. 3 (a) and 3 (b), the rotary transfer means 52 extending in the axial direction and projecting in the radial direction.
Is equipped with.

On the upstream side of the rotary furnace 37, that is, on the carbide loading side, a box-shaped loading jacket 42 made of steel is provided, and the carbide transporting means (spiral means) 35 is provided.
And a combustion burner 43 that ignites and burns carbides.

It should be noted that, of the outer cylinder of the chute portion 35a and the screw of the conveying means 35 inside, at least the combustion furnace 36
The site located inside does not contain chromium, such as Fe-N
It is composed of i-Co alloy (commonly known as Kovar).

Further, on the downstream side of the rotary furnace 37, that is, on the carbonized and activated carbon discharge side, there is provided a box-shaped discharge jacket 45 made of steel with a fireproof / heatproof layer 44 made of a fireproof and heatproof castable material inside. ing. Further, on the lower side of the discharge jacket 45, opening / closing valves 55a and 55b are provided.
An ejector 56 with a double damper according to
By this discharge device 56, carbonization and activated carbon are discharged intermittently. Then, by this device, the invasion of air into the rotary furnace 37 is restricted, and the carbonization and the activated carbon treatment are surely performed.

FIG. 4 is a conceptual diagram showing a second embodiment of the case where the unburned carbide in the rotary furnace is burned to incinerate, and in FIG. A grate (lost) 46 is provided to form a zone for burning the unburned carbide in the rotary furnace 37.
The ashed processed material is collected in an ash collection box (not shown).

In the first and second embodiments, a pipe 47 is provided on the upper side of the exhaust jacket 45, and exhaust gas is exhausted from the heat exchanger 48 and the bag filter 49 through the pipe 47. Exhaust via 53. Also,
The exhaust gas may burn the exhaust gas at a temperature of 850 ° C. or higher at the portion of the pipe 47, and may further ventilate the exhaust gas to a combustion gas furnace, a cyclone, a heat exchanger, or the like. 50 is a seal.

Next, a series of heat treatments of the above first and second embodiments will be described. First, before introducing the object to be treated, hot air gas is generated by the combustion burner 31 in the combustion furnace 30 to obtain hot air gas at a predetermined temperature.

The hot air gas is supplied from the hot air gas inlet port 51 to the lower hot air gas chamber 22d to the communication port 25 as shown by the arrow.
The decomposition vessels 22 and 2 pass through the hot air gas chamber 21d in the upper stage.
After heating 1, part of it is introduced into the combustion furnace 30 by the circulation blower 32. In addition, a part of the other part is recovered by a heat exchanger or the like, purified by a bag filter and then discharged.

When the upper decomposition vessel 21 is subjected to the drying / dechlorination treatment and the lower decomposition vessel 22 is subjected to the volume reduction treatment by carbonization, the temperature in the lower decomposition vessel 22 is controlled by hot air gas. For example, the temperature is adjusted to 600 ° C.

After reaching the predetermined temperature (within 1 hour after starting), the material to be treated is charged from the charging means 10 to start thermal decomposition. The decomposed gas generated by the thermal decomposition is introduced into the combustion furnace 30 through the dry distillation gas conduit 27 from the nozzle 33, and is combusted together with the circulating gas by the circulating blower 32. Further, the generated decomposition gas is introduced into the combustion furnace 30 through the dry distillation gas conduit 27 and burned at a predetermined temperature or higher to be rendered harmless.

In the dechlorination treatment in the decomposition vessel 21 in the upper stage, a treatment agent (chemical agent: powder such as sodium hydrogencarbonate) which reacts with an organic halogen compound to produce harmless chloride is mixed with the treatment object. Then, the mixture charged from the charging means 10 is heat-treated. This heat treatment is based on the mixing ratio of the mixed objects, the temperature at which harmful components are deposited, the time,
The treatment conditions such as the amount of precipitation and the amount of chemicals that can be sufficiently removed by reacting with harmful components should be investigated in advance, and the treatment should be performed at a temperature (200 ° C to 350 ° C) and time that can cover this.

The decomposition vessel 21 in the upper stage is dried, and the generated organic halogen compound is brought into contact with the added chemical agent to produce harmless chlorides (sodium chloride, etc.), to be treated and decomposed. Prevent harmful organic halogen compounds (dioxins, etc.) from remaining in the gas.

As the treating agent to be mixed or added to the object to be treated, an alkaline substance which produces a harmless chloride (such as sodium chloride) by catalytically reacting with HCl (hydrogen chloride) which is an organic halogen compound is used. For example, Japanese Patent Application Laid-Open No. 9-155326 and Japanese Patent Application Laid-Open No. 10-43731 filed by the applicant of the present application earlier.
No. 10-235186, 10-235.
No. 187, an alkaline earth metal, an alkaline earth metal compound, an alkali metal, an alkali metal compound,
Specifically, calcium, lime, slaked lime, calcium carbonate, dolomite, silicate (calcium silicate, etc.), sodium hydrogen carbonate, sodium carbonate, sodium sesquicarbonate, natural soda, sodium hydroxide, potassium hydroxide,
Select one type from potassium hydrogen carbonate and potassium carbonate, or mix and use several types. The amount used is 5 to 30% by weight with respect to the material to be treated. In particular, the alkali metal compounds are lithium, sodium, potassium, rubidium, potassium oxides, hydroxides, hydrogen carbonates, carbonates, silicates, phosphates, aluminates, nitrates and sulfates.

Specific treatment agents for alkali metal compounds include sodium hydrogen carbonate, sodium carbonate, sodium sesquicarbonate, natural soda, potassium carbonate, potassium hydrogen carbonate, sodium potassium carbonate, sodium hydroxide,
Using potassium hydroxide, as sodium hydrogen carbonate, sodium acid carbonate, sodium bicarbonate, sodium bicarbonate, as sodium carbonate, sodium carbonate, soda, soda ash, laundry soda, crystalline soda, as sodium sesquicarbonate, Dicarbonic acid-sodium hydrogen carbonate, sodium hydrogencarbonate, sodium sesquicarbonate,
As natural soda, trona is used.

For example, the above sodium hydrogen carbonate (NaHCO 3
_{When 3} ) is used, decomposition gas of HCl component is generated in the dechlorination furnace, which is the first heat treatment furnace, but immediately reacts with sodium hydrogen carbonate to (NaHCO ₃ ) + (HCl) → (NaCl) + (H ₂
It becomes O) + (CO ₂ ), producing harmless sodium chloride (NaCl), and eliminating harmful HCl from the decomposition gas. As a result, detoxification of the HCl component in the decomposition gas and detoxification of the object to be treated are performed simultaneously.

The object to be treated after depositing the harmful components is sent to the decomposition vessel 22 in the lower stage through the flexible joint 23 as described above, where it is carbonized, and the carbide (treated material) is discharged through the discharge port 22c. Is introduced into the rotary furnace 37 of the carbide processing furnace 36 by the transfer means 34, 35.

The carbide introduced into the rotary furnace 37 of the carbide processing furnace 36 is processed according to the purpose of carbonization, activated carbon or ashing. Since the rotary furnace 37 is configured to be inclined by 2 to 3 degrees in the traveling direction, they are naturally transported to the discharge jacket 45 as described above.

[0059]

As described above, according to the present invention,
When the object to be treated is directly burned as it is, it is difficult to control temperature control, time control and the like, and therefore various harmful substances tend to be easily generated. However, if the object to be treated is treated by indirect heating, it will contain organic substances and volatile harmful substances (VOC).
Etc.) and the amount of these components remaining is decreasing. However, in the case of thermal decomposition by indirect heating, stable thermal decomposition treatment can be performed because heating control is easy, but some harmful substances may remain in the residue.

Therefore, the residue containing the carbonized material that has been carbonized by indirect heating is burned in an individual incinerator, that is, directly heated to decompose and remove the organic material containing the residue and the volatile harmful substance.

As a result, there is an advantage that it can be recovered with a more porous activated carbon by recovery with charcoal containing no harmful substances and organic substances and activation treatment, and can be returned to society as a material for effective utilization.

On the other hand, when it cannot be reduced as a material of society because it contains heavy metals, it can be ashed to promote the reduction of the solubility and contribute to the reduction of the buried amount.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of a thermal decomposition treatment facility showing a first embodiment of the present invention.

FIG. 2 is a detailed sectional view of a carbide processing furnace.

FIG. 3A is a cross-sectional view showing a conveying means made of a refractory heat-resistant material, and FIG. 3B is a partially enlarged perspective view of the conveying means.

FIG. 4 is a sectional view of a carbide processing furnace showing a second embodiment of the present invention.

[Explanation of symbols]

10 ... Input means 11 ... Hopper 12 ... Transport means 20 ... Thermal decomposition means 21, 22 ... Decomposition container 24, 26 ... Partition plate 27 ... Dry distillation gas conduit 30 ... Combustion furnace 31 ... Combustion burner 32 ... Circulation blower 34, 35 ... Transporting means 36 ... Carbide processing furnace 37 ... Rotary furnace 38, 44 ... Fireproof heat resistant layer 42 ... Input jacket 45 ... Discharge jacket 46 ... Lostor 52 ... Transporting means 56 ... Ejection device

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) C10B 53/00 C10B 53/02 57/02 53/02 F23G 5/027 Z 57/02 B09B 3/00 ZAB F23G 5/027 303A F term (reference) 3K061 AA08 AB02 AC01 AC12 AC13 AC14 AC17 BA05 FA12 4D004 AA01 AB03 AB06 BB03 CA26 CA27 CA28 CB05 CB09 CB34 CB43 CB45 4H012 HA04 HA06 HB04 HB07 JA03 JA04

Claims (8)

[Claims] 1. A method of thermally decomposing an object to be treated containing an organic substance by indirect heating, and further subjecting the obtained residue containing a carbide to a heat treatment to process the residue containing a carbide. Was put into a rotary kiln equipped with a transfer means inside, and the residue was ignited by a combustion burner.
A heating and processing method characterized in that a volatile component contained in a residue is removed and moved to carry out a carbonization promoting treatment. 2. A method of thermally decomposing an object to be treated containing an organic substance by indirect heating, and further subjecting the obtained residue containing carbide to heat treatment to process the residue containing carbide. Was put into a rotary kiln equipped with a transfer means inside, and the residue was ignited by a combustion burner.
A heat processing method, characterized in that volatile components contained in the residue are removed, and activated carbonization treatment is carried out by moving while activating treatment. 3. A method of thermally decomposing an object to be treated containing an organic substance by indirect heating, and further subjecting the obtained residue containing carbide to heat treatment to obtain a residue containing carbide. Was put into a rotary kiln equipped with a transfer means inside, and the residue was ignited by a combustion burner.
A heat processing method characterized by moving while burning and performing ashing. 4. A rotary kiln equipped with a conveying means that projects in a spiral or spline shape inside, a workpiece feeding means and a combustion means provided on one end side of the rotary kiln, and the other end of the rotary kiln. A heat processing apparatus, characterized in that it is provided with a workpiece take-out means provided on the side. 5. An inclined rotary kiln, a workpiece introducing means and a combustion means provided on the upper inclined side of the rotary kiln, and a workpiece removing means provided on the lower inclined side of the rotary kiln. A heat processing apparatus characterized by being configured as follows. 6. A rotary kiln having a conveying means projecting in a spiral shape or a spline shape inside, means for obliquely arranging the rotary kiln, and an object to be processed provided on an upper side of an inclination of the obliquely arranged rotary kiln. A heating and processing apparatus characterized by comprising a charging means, a combustion means, and a workpiece take-out means provided on the lower side of the tilt of a rotary kiln which is tilted. 7. The heat processing apparatus according to claim 4, wherein the inner wall of the rotary kiln is covered with a refractory material. 8. The heat processing apparatus according to claim 4, 5 or 6, wherein said conveying means is made of a refractory material having a protrusion.