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Method for circulating hot water though furnace body water jacket of blast furnace, drying to reduce water of briquetted furnace charge and automatically charging

A blast furnace and water jacket technology, which is applied to furnaces, drying machines, dryers, etc., can solve the problems of not being able to use immediately, increasing production costs and labor safety burdens, and consuming labor for feeding materials.

Inactive Publication Date: 2018-06-08
YAN XIN ENVIRONMENTAL PROTECTION & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technological process is widely used, but it has obvious disadvantages. One is that the raw materials used in the blast furnace have a water content of 11-13%, and the strength is not enough to be used immediately. The raw materials are naturally air-dried to increase the strength, so that a large backlog of raw material liquidity is accumulated; the second is that the manual feeding process consumes a lot of labor, which increases the production cost and labor safety burden of the enterprise
Usually, the feeding capacity of a worker per shift is about 5T / person per shift, for a hearth area of ​​8m2 2 For large and medium-sized furnaces, based on 250T material / day, the number of labor required for feeding is 50 people / day, and the cost of feeding alone is as high as 30 yuan / ton

Method used

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  • Method for circulating hot water though furnace body water jacket of blast furnace, drying to reduce water of briquetted furnace charge and automatically charging
  • Method for circulating hot water though furnace body water jacket of blast furnace, drying to reduce water of briquetted furnace charge and automatically charging

Examples

Experimental program
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Effect test

Embodiment 1

[0025] according to figure 1 The layout is set, the blast furnace is set on the lower floor,

[0026] upper layer:

[0027] High hot water tank: volume 1.8×2×2=7.2m 3 , 12 DN150 hot-dip galvanized pipes with a length of 6m are installed on the upper part, which are directly connected to the atmosphere as a steam condenser, and high-temperature hot water outlets are installed on both sides of the lower part, with a diameter of DN150;

[0028] Low water tank: volume 5.76m3 , arranged at the lower part of the hydraulic press, the diameter of the outlet pipe and the low-temperature inlet pipe is arranged according to DN150×2;

[0029] Hot water circulating pump: select flow rate 100 m 3 / h, head 25m, power 11kw, water pipe diameter DN150mm;

[0030] Long-chain row conveyor: set under the high-level hot water tank, the chain link pitch is 66.75mm, the chain row width is 1500mm, the grid is made of 30×30×3 square tubes, the diameter of the sprocket is φ800 mm, and the center dis...

Embodiment 2

[0037] Type selection of hot water circulation pump, flow rate 150 m 3 / h, lift 25m, and motor 18.5kw are different, the rest of the equipment is the same as embodiment 1, and the implementation effect is basically the same as embodiment 1, but the power consumption is higher and the cost increases.

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Abstract

The invention discloses a method for circulating hot water through a furnace body water jacket of a blast furnace, drying to reduce water of briquetted furnace charge and automatically charging. A high-position hot water tank is arranged above the blast furnace for receiving high-temperature hot water circulated out from the furnace body water jacket of the blast furnace; high-temperature hot water flows to a low-position water tank after passing through a hot water tube arranged in the a long-chain-row conveyor; cold air outside a hot water tube wall is heated to form ascending hot air flow for continuously heating conveying wet briquetting materials, so that water is dried and reduced, and then is conveyed to a storage hopper arranged under the long-chain-row conveyor; heat-exchanged andcooled hot water in a hot water tube enters the low-position water tank to store and is pumped to the furnace body water jacket of the blast furnace for circulatory heating; and a charging system isarranged between the storage hopper and the blast furnace, so that automatic conveying and charging of the blast furnace is realized. In this way, natural circulating air is heated by the furnace bodywater jacket of the blast furnace, and water of briquetted furnace charge is reduced by drying, strength of briquetted furnace charge is improved, long-distance conveying is directly realized, the blast furnace is automatically charged, and production cost is reduced.

Description

technical field [0001] The invention relates to the non-ferrous smelting industry and smelting furnace material making and feeding equipment technology, in particular to a method of using the hot water circulating in the water jacket of the blast furnace body to heat the natural circulating air, drying and decompressing the moisture content of the furnace material of the block, increasing the strength of the material block, and realizing a relatively high temperature at the same time. A method for long-distance transportation and automatic charging of blast furnaces. Background technique [0002] In the non-ferrous smelting industry, enterprises specializing in the recycling of secondary resources such as dust and leaching slag generally adopt the conventional process of batching, pressing, storage and air-drying, manual feeding, and blast furnace smelting for raw materials used in blast furnaces. This technological process is widely used, but it has obvious disadvantages. O...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D17/00F27D3/12F26B21/00C22B7/00
CPCC22B7/001F26B21/002F27D3/12F27D17/004F27D2003/121F27D2003/125Y02P10/20Y02P10/25
Inventor 石仁章石宏娇梁金凤石俊阳王小明汪琴梁智芳石宇梁生武梁瑞勇
Owner YAN XIN ENVIRONMENTAL PROTECTION & TECH CO LTD
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