JPS5814941A - Apparatus for preparing aggregate material from dust - Google Patents

Apparatus for preparing aggregate material from dust

Info

Publication number
JPS5814941A
JPS5814941A JP56112603A JP11260381A JPS5814941A JP S5814941 A JPS5814941 A JP S5814941A JP 56112603 A JP56112603 A JP 56112603A JP 11260381 A JP11260381 A JP 11260381A JP S5814941 A JPS5814941 A JP S5814941A
Authority
JP
Japan
Prior art keywords
kiln
dust
preheater
temperature
exhaust gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP56112603A
Other languages
Japanese (ja)
Other versions
JPS6129897B2 (en
Inventor
Teruo Matsuno
真津野 輝雄
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Zosen Corp
Original Assignee
Hitachi Zosen Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Zosen Corp filed Critical Hitachi Zosen Corp
Priority to JP56112603A priority Critical patent/JPS5814941A/en
Publication of JPS5814941A publication Critical patent/JPS5814941A/en
Publication of JPS6129897B2 publication Critical patent/JPS6129897B2/ja
Granted legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J6/00Heat treatments such as Calcining; Fusing ; Pyrolysis

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Processing Of Solid Wastes (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)

Abstract

PURPOSE:To make it possible to prepare an aggregate material from dust always availably in rapid temp. control, by a method wherein a bypass duct is connected to the throw-in chamber of a kiln to spray cooling water into the kiln when the temp. therein is raised and sintering exhaust gas is returned to a preheater. CONSTITUTION:In an apparatus for preparing an aggregate material from dust, a bypass duct is connected to the throw-in chamber of a kiln and a humidifying machine is attached to the throw-in chamber of the kiln or the bypass duct. When the temp. in the rotary kiln is raised by combustion of the uncombustion component in dust pellets, cooling water is sprayed from said humidifying machine. In addition, the baking exhaust gas from the rotary kiln is passed through the throw-in chamber of the kiln and the part thereof is introduced into a preheater from the bypass duct and the residual part thereof is introduced into a dust collector along with the exhaust gas of the preheater. By this mechanism, regardless of the content of the uncombustion component in dust, the aggregate material can be prepared by treating dust.

Description

【発明の詳細な説明】 この発明は、ダストからの骨材製造装置に関する。[Detailed description of the invention] The present invention relates to an apparatus for producing aggregate from dust.

一般に、ロータリキルン式骨材製造装若においては、ダ
ストの主成分がシリカ(Si02)、アルミナ[A12
03)およびその他の酸化物(FeQ 、Cab。
Generally, in rotary kiln aggregate manufacturing equipment, the main components of dust are silica (Si02) and alumina [A12].
03) and other oxides (FeQ, Cab.

MgO等]よりなる場合には、焼成温度と、酸化物中の
アルカリ成分の融液生t?J温度(軟化温度)とが共存
する。したがってダストを造粒したペレットの強度を大
きくするために、ロータリキルン内の焼成温度を上げす
ぎると、ペレット同志あるいはペレットとロータリキル
ンの壁とが溶、着し、つぎのような問題が生じる。
[MgO, etc.], the firing temperature and the melt raw temperature of the alkali component in the oxide. J temperature (softening temperature) coexists. Therefore, if the firing temperature in the rotary kiln is raised too much in order to increase the strength of the pellets made of dust, the pellets may melt or adhere to each other or the wall of the rotary kiln, causing the following problems.

(1)ペレットが溶着し粗大化して骨材とならない。(1) Pellets are welded and coarsened and do not become aggregate.

(2)  ロータリキルンの壁に溶着したペレットが粗
大化し、剥nるときにキルンの壁を損傷する。
(2) The pellets welded to the rotary kiln wall become coarse and damage the kiln wall when peeled off.

(3)  出口シュートなどに詰まる。(3) It gets clogged in the exit chute, etc.

また逆に、ロータリキルン内の焼成温度を下げると1焼
成ベレツトの強度が低下し、つぎのような問題が生じる
Conversely, if the firing temperature in the rotary kiln is lowered, the strength of the single-fired beret will decrease, causing the following problems.

(4)骨材として強度が不足し、製品とならない。(4) It lacks strength as an aggregate and cannot be used as a product.

歩留りが低下する。Yield decreases.

したがって、上記のような問題が生じないようにロータ
リキルン内のダスト・ペレットの焼成温度は常に一定範
囲内にあるように調節する必要がある。
Therefore, it is necessary to adjust the firing temperature of the dust pellets in the rotary kiln so that it always falls within a certain range so that the above-mentioned problems do not occur.

ところで、都市ごみの焼滓や石炭火力発電所の集塵機の
フライアッシュ等のダストには未燃成分が含まnてぃて
1その量は変動□するが、この未燃成分から生じる燃焼
熱量によってロータリキルン内の焼成温度も変動するこ
とになる。
By the way, dust such as urban waste incineration slag and fly ash from coal-fired power plant dust collectors contains unburned components, and the amount varies, but the amount of combustion heat generated from these unburned components causes the rotor to burn. Firing temperatures within the kiln will also vary.

このため従来は、バーナの燃焼熱量を調整し、焼成温度
を調節しているが、この場合バーナの燃料、!=1,7
重油等0液体燃料または天燃”ス′31の気体燃料を使
用すれば、燃料費が高くつき、また微粉炭を使用すわば
安価ではあるが、応答速度が遅く、その間に焼成温度が
変動するという問題がある。さらに未燃成分の燃焼熱量
が、未燃成分が無い場合のバーナの燃焼熱量すなわちダ
スト・ペレットの焼成に必要な熱量よりも多いときには
、バーナの燃料の種類に関係なく、焼成温度が上昇して
しまい、調節が不可能となる。したがってこのような燃
焼熱量の多い未燃成分を含むダストを処理し、骨材を製
造することは好ましくなかった。
For this reason, conventionally, the combustion heat of the burner is adjusted to adjust the firing temperature, but in this case, the burner fuel! =1,7
If liquid fuel such as heavy oil or gaseous fuel such as natural gas is used, the fuel cost will be high, and if pulverized coal is used, it will be cheaper, but the response speed will be slow and the firing temperature will fluctuate during that time. Furthermore, if the amount of combustion heat of the unburned components is greater than the amount of combustion heat of the burner in the absence of unburned components, that is, the amount of heat required to sinter the dust pellets, regardless of the type of fuel in the burner, sintering will not be possible. The temperature rises and cannot be adjusted. Therefore, it is not desirable to process dust containing unburned components with a large amount of combustion heat to produce aggregate.

この発明は、上記の点に鑑みなされたもので、ダスト中
に含まれる未燃成分の燃焼熱量が多い場合であっても迅
速な温度制御が可能であり、このようなダスト中の未燃
成分の含有量にか\わらず、常にダストから骨材を有利
に製造し得る装置を提供しようとするものである。
This invention was made in view of the above points, and it is possible to quickly control the temperature even when the amount of combustion heat of unburned components contained in dust is large. The object of the present invention is to provide an apparatus that can always advantageously produce aggregate from dust, regardless of the content of dust.

この発明は、ダスト・ペレットを予熱して乾燥するプレ
ヒータと、プレヒータからの乾燥ペレットを燃焼カスに
よって焼成するロータリキルンとを備えたダストからの
骨材製造装置において、ロータリキルンの燃焼ガス導入
側に加湿機が取り付けられ、プレヒータの乾燥ペレット
排出側に乾燥ペレットのキルン投入室が設けらnlこの
キルン投入室にバイパスダクトが接続され、キルン投入
室またはバイパスダクYに加湿機が取り付けられており
、ダスト・ペレットに含まわる未燃成分の燃焼によりロ
ータリキルン内の温度が上昇したさいに加湿機より冷却
用水が噴霧されるように、なされるとともに、このロー
多すキルンからの焼成排ガスが乾燥ペレットのキルン投
入室を通過して、その一部がバイパスダクトよりプレヒ
ータに導入さn1残部がプレヒータ排ガスと共に集塵機
等に導かれるようになされ、上記焼成排ガスの温度が高
い場合に加湿機よりキルン投入室またはバイパスダクト
内に冷却用水が噴霧されるようになさnたことを特徴と
するものである。
The present invention provides an apparatus for producing aggregate from dust, which is equipped with a preheater that preheats and dries dust pellets, and a rotary kiln that burns the dried pellets from the preheater using combustion residue. A humidifier is installed, and a kiln input chamber for dry pellets is provided on the dried pellet discharge side of the preheater. A bypass duct is connected to this kiln input chamber, and a humidifier is installed in the kiln input chamber or bypass duct Y.・When the temperature inside the rotary kiln rises due to the combustion of unburned components contained in the pellets, cooling water is sprayed from the humidifier, and the burning exhaust gas from the rotary kiln is used to cool the dry pellets. After passing through the kiln charging chamber, a part of it is introduced into the preheater through a bypass duct, and the remaining part is led together with the preheater exhaust gas to a dust collector, etc., and when the temperature of the firing exhaust gas is high, it is introduced into the kiln charging chamber or It is characterized in that cooling water is sprayed into the bypass duct.

この発明を、以7図面を参照しながら詳シく説明する。This invention will be explained in detail below with reference to seven drawings.

なお図面には各部における最適温度が例示されている。Note that the drawings illustrate the optimum temperatures for each part.

図面において、造粒機によりたとえば直径5〜20鵡の
球状に造粒されたダスト・ペレットはまずプレヒータに
投入され、そこで予熱され乾燥される。ついで約600
℃の乾燥ペレットはプレヒータの一端部に設けられたキ
ルン投入室よりロータリキルン内に投入され、そこでバ
ーナの燃焼ガスにより焼成基nる。焼成後の約1200
℃のペレットはクーラに導かれて、常温の大気により冷
却され、約100℃のペレットとして排出される。この
冷却後のにレットをその粒径により分別して骨材製品と
なさnる。
In the drawing, dust pellets granulated by a granulator into a spherical shape with a diameter of, for example, 5 to 20 mm are first fed into a preheater, where they are preheated and dried. Then about 600
The dried pellets at a temperature of .degree. C. are charged into a rotary kiln from a kiln charging chamber provided at one end of a preheater, where they are fired by combustion gas from a burner. Approximately 1200 after firing
The pellets at temperature of 100°C are led to a cooler, cooled by the atmosphere at room temperature, and discharged as pellets at about 100°C. After cooling, the pellets are separated into aggregate products by particle size.

一方、クーラからの約600℃の冷却排ガスはロータリ
キルンに導かれ、ロータリキルンからの約800℃の焼
成排ガスはプレヒータに導かれる。さらにプレヒータか
らの約100℃の排ガスは集塵機を経て煙突より排出さ
れるものである。
On the other hand, the approximately 600° C. cooling exhaust gas from the cooler is led to the rotary kiln, and the approximately 800° C. firing exhaust gas from the rotary kiln is led to the preheater. Furthermore, the exhaust gas at about 100° C. from the preheater passes through a dust collector and is discharged from the chimney.

ところで、上記装置の各部の温度は、ダストの未燃成分
の平均値に基づく最適温度制御パター−ンにおける温度
に設定されている。ここで、ダストの未燃成分が設定値
の範囲を越えるようなものである場合には、その燃焼(
赤熱反応)により、ペレットの温度が上昇するとともに
゛、焼成ガス温度も上昇する。すると、ロータリキルン
に取り付けられた温度センサにより、この温゛   度
が検出さnlこの検出温度と制御温度とを比較して、必
要ならばロータリキルンの一端部に設けられた加湿機に
信号を送り、冷却用水なキルン内に噴霧し、て、この水
の蒸発熱によりキルン内の雰囲気温度を下げ、ペビット
の焼成温度を下げる。その結果、ペレットの焼成温度が
設定値に戻れば、加湿機による水の噴霧な停止する。
Incidentally, the temperature of each part of the device is set to a temperature in an optimum temperature control pattern based on the average value of unburned components of dust. Here, if the unburned components of the dust exceed the set value range, the combustion (
Due to the red heat reaction), the temperature of the pellet increases and the temperature of the firing gas also increases. Then, this temperature is detected by a temperature sensor attached to the rotary kiln, and this detected temperature is compared with the control temperature, and if necessary, a signal is sent to a humidifier installed at one end of the rotary kiln. Cooling water is sprayed into the kiln, and the heat of evaporation of this water lowers the atmospheric temperature inside the kiln, thereby lowering the firing temperature of the pevit. As a result, when the pellet firing temperature returns to the set value, the humidifier stops spraying water.

このように噴霧氷量が増大すれば、これに相当する水蒸
気量が増し、全体として焼成□ガス量が増えるとともに
、その熱量も増加している。
If the amount of sprayed ice increases in this way, the amount of water vapor corresponding to this increases, and the amount of firing gas increases as a whole, and the amount of heat also increases.

ペレットがキルン投入温度より焼成温度まで上昇するの
に必要な熱量は一定であるから、ロータリキルンより排
出さnてプレヒータの一端部のキルン投入室に到達する
焼成排ガスは、その量が増大しかつ温度が高くなってい
る。
Since the amount of heat required to raise the pellets from the kiln charging temperature to the firing temperature is constant, the amount of firing exhaust gas discharged from the rotary kiln and reaching the kiln charging chamber at one end of the preheater increases and The temperature is high.

このような焼成排ガスをそのま\でプレヒーりに送れば
、プレヒータが損傷を受け、またペレットの乾燥および
昇温パターンが変化し、ペレットが破裂する゛などの問
題が生じる。そこで、まずキルン投入室あるいはバイパ
スダクトの始端部に取り付けられた温度センサにより焼
成排ガス温度が検出され1こnを設定値と比較して、必
要ならばキルン投入室あるいはバイパスダクトの始端部
に取り付けられた加湿機に信号を送り、冷却用水を噴霧
して、この水の蒸発熱により焼成排ガス温度を下げる。
If such firing exhaust gas is directly sent to the preheater, the preheater will be damaged, and the drying and temperature increase pattern of the pellets will change, causing problems such as pellet bursting. Therefore, first, the temperature of the firing exhaust gas is detected by a temperature sensor installed in the kiln charging chamber or the starting end of the bypass duct, and the temperature is compared with the set value. A signal is sent to the humidifier, which sprays cooling water, and the heat of evaporation of this water lowers the temperature of the firing exhaust gas.

その結果、焼成排ガス温度が設定値になれば水の噴霧な
停止する。
As a result, when the firing exhaust gas temperature reaches the set value, water spraying stops.

このように焼成排ガスは設定温度に保持されるが、プレ
ヒータにおいてペレットが投入温度より乾燥温度まで上
昇するのに必要な熱量は一定であるから、この焼成・排
ガスの全量をプレヒ−タに送れば1これより排出される
ガスの温度が高くなり、またプレヒータを損傷する問題
が生じる。そこで、プレヒータのたとえば排ガス最終ダ
クト等に取り付けらnた温度センサにより乾燥・昇温排
ガス温度が検出され、これを設定値と比較して、必要な
らばバイパスダクトに設けられたダンパ(開閉バルブ)
を開放する信号を送り)ダンパを開放して、バイパス風
量を増大し、プレヒ、−夕に送らnる排ガス量を減少し
て1こnの乾燥・昇温排ガス温度を下げる。
In this way, the firing exhaust gas is maintained at the set temperature, but since the amount of heat required for the preheater to raise the temperature of the pellets from the input temperature to the drying temperature is constant, if the entire amount of this firing exhaust gas is sent to the preheater, 1 The temperature of the discharged gas becomes higher than this, and there is a problem of damaging the preheater. Therefore, the temperature of the dry/heated exhaust gas is detected by a temperature sensor installed in the final exhaust duct of the preheater, and this is compared with a set value, and if necessary, a damper (opening/closing valve) installed in the bypass duct is detected.
(sends a signal to open the damper), increases the bypass air volume, reduces the amount of exhaust gas sent to the preheating and evening, and lowers the temperature of the dry and heated exhaust gas.

その結果1排ガス温度が設定値になれば、ダンパを閉じ
るものである。
As a result, if the exhaust gas temperature reaches the set value, the damper is closed.

バイパス風量が増大した場合、これをそのま\集塵機や
排風機に送ると、高温のためこれら□ の機器が損傷を受ける。そこで、プレヒータへの焼成排
ガス導入分岐点より後のバイパスダクトの部分に取り付
けられた温度センサによりバイパスガスの湿度が検出さ
れ、これを設定値と比較して、必要ならば上記分岐点よ
り後のバイパスダクトに取り付けられた加湿機に信号を
送り、冷却用水を噴霧してバイパスガスの温度を下げる
。その結果、バイパスガスの温度がプレヒータからの乾
燥・昇温排ガス温度と同一の設定温度となわば、加湿機
による水の噴霧を停止するものである。
When the bypass air volume increases, if it is directly sent to the dust collector or exhaust fan, the high temperature will damage these devices. Therefore, the humidity of the bypass gas is detected by a temperature sensor attached to the part of the bypass duct after the branch point where the firing exhaust gas is introduced to the preheater, and this is compared with the set value. A signal is sent to the humidifier attached to the bypass duct, which sprays cooling water to lower the temperature of the bypass gas. As a result, when the temperature of the bypass gas reaches the same set temperature as the temperature of the dry and heated exhaust gas from the preheater, the humidifier stops spraying water.

この発明によるダストからの骨材製造装着は、上述の次
第で、被処理ダスト中に含まれる未燃成分が増加した場
合であって01所期の1温度制御により骨材を製造する
ことができ、また逆に被処理ダス(中の未燃成分が減少
した場合には、上記増加の場合の動作と反対の信号で各
部の温度を制御して骨材を製造することができるもので
ある。したがってこの発明によれ4f、タ°スト中・の
未燃成分の含有量にか−わらず、これらを処理すること
ができ、骨材を製造すること力5てきるという効果を奏
する。
As described above, the method of producing aggregate from dust according to the present invention is possible when the unburned components contained in the dust to be treated increase and it is possible to produce aggregate by controlling the temperature as expected. Conversely, when the unburned components in the waste to be treated decrease, aggregate can be manufactured by controlling the temperature of each part with a signal opposite to the operation in the case of increase. Therefore, according to the present invention, irrespective of the content of unburned components in the taste, these can be treated, and it is possible to produce an aggregate with an effect of increasing the efficiency.

【図面の簡単な説明】[Brief explanation of the drawing]

図面はこの発明の実施例を示す概略説IJJ [Jであ
る。 以  上 特許出願人  日立造船株式会社 外4名
The drawings are a schematic illustration of an embodiment of the invention. Patent applicants: 4 people other than Hitachi Zosen Corporation

Claims (1)

【特許請求の範囲】[Claims] ダスト・ペレットを予熱して乾燥するプレヒータと、プ
レヒータからの乾燥ペレットを燃焼ガスによって焼成す
るロータリキルンとを備えたダストからの骨材製造装置
において、ロータリキルンの燃焼ガス導入側に加湿機が
取り付けらn1プレヒータの乾燥ペレット排出側に乾燥
ペレットのキルン投入室が設けられ、このキルン投入室
にバイパスダクトが接続され、キルン投入室またはバイ
パスダクトに加湿機が取り付けられて、おり、ダスト・
ペレットに含まわる未燃成分の燃焼によりロータリキル
ン内の温度が上昇したさいに加湿機より冷却用水が噴霧
されるようになされるとともに、このロータリキルンか
らの焼成排ガスが乾燥ペレットのキルン投入室を通過し
て、その一部がバイパスダクトよりプレヒータに導入さ
れ1残部がプレヒータ排ガスメ共に集塵機等に導かれる
ようになさn1上記焼成排ガスの温度が高い場合に加湿
機よりキルン投入室またはバイパスダクト内に冷却用水
が噴霧されるようになされたことを特徴とするダストか
らの骨材製造装置。
In an apparatus for producing aggregate from dust, which is equipped with a preheater that preheats and dries dust pellets and a rotary kiln that uses combustion gas to sinter the dried pellets from the preheater, a humidifier is installed on the combustion gas introduction side of the rotary kiln. A kiln input chamber for dry pellets is provided on the dried pellet discharge side of the n1 preheater, a bypass duct is connected to this kiln input chamber, and a humidifier is attached to the kiln input chamber or the bypass duct.
When the temperature inside the rotary kiln rises due to the combustion of unburned components contained in the pellets, cooling water is sprayed from the humidifier, and the combustion exhaust gas from the rotary kiln flows into the kiln input chamber for dry pellets. A part of it is introduced into the preheater through the bypass duct, and the remaining part is introduced together with the preheater exhaust gas into a dust collector, etc. n1 When the temperature of the above firing exhaust gas is high, it is introduced into the kiln charging chamber or bypass duct from the humidifier. An apparatus for producing aggregate from dust, characterized in that cooling water is sprayed onto the aggregate.
JP56112603A 1981-07-17 1981-07-17 Apparatus for preparing aggregate material from dust Granted JPS5814941A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56112603A JPS5814941A (en) 1981-07-17 1981-07-17 Apparatus for preparing aggregate material from dust

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56112603A JPS5814941A (en) 1981-07-17 1981-07-17 Apparatus for preparing aggregate material from dust

Publications (2)

Publication Number Publication Date
JPS5814941A true JPS5814941A (en) 1983-01-28
JPS6129897B2 JPS6129897B2 (en) 1986-07-10

Family

ID=14590857

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56112603A Granted JPS5814941A (en) 1981-07-17 1981-07-17 Apparatus for preparing aggregate material from dust

Country Status (1)

Country Link
JP (1) JPS5814941A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6199743A (en) * 1984-10-19 1986-05-17 Ishikawajima Shibaura Kikai Kk Speed change gear
JPS61103038A (en) * 1984-10-23 1986-05-21 Ishikawajima Shibaura Kikai Kk Speed changer
JPS62195746U (en) * 1986-05-31 1987-12-12

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6199743A (en) * 1984-10-19 1986-05-17 Ishikawajima Shibaura Kikai Kk Speed change gear
JPS61103038A (en) * 1984-10-23 1986-05-21 Ishikawajima Shibaura Kikai Kk Speed changer
JPH0571820B2 (en) * 1984-10-23 1993-10-08 Ishikawajima Shibaura Mach
JPS62195746U (en) * 1986-05-31 1987-12-12

Also Published As

Publication number Publication date
JPS6129897B2 (en) 1986-07-10

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