A belt roaster and its method for controlling and detecting the over-wet layer in the drum drying section

A technology of belt roasting machine and dry section, which is applied in the direction of furnace control device, furnace material, furnace, etc. It can solve the problems of increasing the pressure loss of the material layer, the flattening of the soft ball, and the high power consumption of the fan, and achieve the effect of eliminating the over-humidity layer

Active Publication Date: 2020-03-17
ZHONGYE-CHANGTIAN INT ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the production process of the belt roaster under the prior art, due to the lack of fast and effective over-humidity layer detection and control measures, there is often a serious over-humidity layer in the material of the belt roaster (especially the drum drying section) during production, so Two problems arise:
[0006] 1. Poor strength of green balls: Due to the existence of the over-humidity layer, some green balls with high moisture content in the roasting machine during production will cause the green balls with a certain compressive strength to become weaker in strength. Even soft balls with no strength will be flattened or even broken into powder when they are squeezed by the upper layer of material, which seriously affects the yield of the belt roaster;
[0007] 2. The power consumption of the fan is high: Same as the first point, because the soft balls in the over-humidity layer are broken into powder, the water and powder will be filled in the gap where the green balls were originally piled up with the roaster, which undoubtedly improves the material layer. Pressure loss greatly increases the power consumption of the fan and causes serious energy waste

Method used

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  • A belt roaster and its method for controlling and detecting the over-wet layer in the drum drying section
  • A belt roaster and its method for controlling and detecting the over-wet layer in the drum drying section
  • A belt roaster and its method for controlling and detecting the over-wet layer in the drum drying section

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] The following equipment is used for processing, with an annual production scale of 4 million tons of oxidized pellets.

[0101] A belt roaster, which includes a belt roaster body 1 and a belt roaster combustion heating system 2, and, according to the process direction, the belt roaster body 1 is sequentially provided with a drum drying section 101, a draining section 102, Preheating section 103, roasting section 104, soaking section 105, first cooling section 106 and second cooling section 107, the combustion heating system 2 includes a combustion chamber, a gas pipeline 201 connected to the combustion chamber, and a combustion system air supply pipeline 202 ;

[0102]Wherein the air outlet 107b of the second cooling section 107 is connected to the air inlet 101a of the drying section 101 via the first pipeline L1, the eleventh pipeline L11 drawn from the air outlet 104b of the roasting section 104 and the air outlet from the soaking section 105 Both the tenth pipeline...

Embodiment 2

[0117] Repeat Example 1, just monitor the temperature detected by the bypass temperature detection device T2 and the flow rate detected by the bypass flow detection device 9, calculate the calorific value that needs to be added to the draining section 102 according to the heat balance, and measure the intake air temperature according to the draining section. The temperature detected by the device T3 adjusts the air intake regulating valve V2 of the draining section. In this embodiment, the value range of k is 1-30Pa.

[0118] The heat balance calculation process is: according to the heat balance, the heat added to the drain section must be equal to the heat lost by the bypass circuit of the dry section, that is:

[0119] Q 抽干 =Q 旁通 =W 旁通 ×T 旁通 ×C 旁通

[0120] Among them: W 旁通 ——The flue gas flow rate of the bypass circuit

[0121] T 旁通 ——The flue gas temperature value of the bypass circuit

[0122] C 旁通 ——The flue gas specific heat capacity of the bypass circuit.

Embodiment 3

[0124] Embodiment 1 is repeated, except that in this embodiment, the value of k ranges from 1 to 20 Pa.

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Abstract

The invention discloses a belt type roasting machine comprising a belt type roasting machine body (1) and a belt type roasting machine combustion heating system (2). The belt type roasting machine body (1) is sequentially provided with a drum drying section (101), a swab-off section (102), a preheating section (103), a roasting section (104), a soaking section (105), a first cooling section (106),and a second cooling section (107) according to a process direction; the belt type roasting machine combustion heating system (2) comprises a combustion chamber, a gas pipeline (201) connected with the combustion chamber, and a combustion system air supply pipeline (202). A production method and device of a novel belt type roasting machine thermal system can timely and effectively detect the generation of an overwetting layer inside the materials in the drum drying section and the overwetting layer is automatically eliminated the first time.

Description

technical field [0001] The invention relates to a sintering machine and a method for using the same, in particular to a Dai's roasting machine and a method for controlling and detecting an over-humidity layer in a drum dry section material, and belongs to the field of sintering equipment and technology. Background technique [0002] Oxidation pellets are one of the important methods of fine ore agglomeration. The concentrate powder is firstly dried in a drying kiln, and then rolled to a suitable particle size, and an appropriate amount of water and binder are added to the pelletizer to make green balls with uniform viscosity and sufficient strength. The green balls are preheated and roasted in an oxidizing atmosphere to make the green balls agglomerate and react chemically to make pellets. The oxidation pellet process is especially suitable for the treatment of fine ore concentrates. The produced pellets have good cold strength, reducibility and particle size composition. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27B21/00F27B21/14C22B1/04
CPCC22B1/04F27B21/00F27D19/00F27D2019/0009F27D2019/0068F27M2003/04
Inventor 周浩宇贺新华
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD
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