CN1075475C

CN1075475C - Production process of water-less fire-resistant blasting slime

Info

Publication number: CN1075475C
Application number: CN96122370A
Authority: CN
Inventors: 王明贤
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-11-29
Filing date: 1996-11-29
Publication date: 2001-11-28
Anticipated expiration: 2016-11-29
Also published as: CN1158828A

Abstract

The present invention relates to a fire-resistant blasting slime without water, particularly to a fire-resistant material special for an iron blocking mouth of a small and a medium sized ironmaking furnaces. A raw material mainly used by fire-resistant blasting slime without water used by the medium sized ironmaking furnace comprises soft loam, rigid loam, clinker powder, multi-aluminium powder, coking powder, red cinder and tar. The raw material mainly used by fire-resistant blasting slime without water used by the small sized ironmaking furnace comprises the soft loam, the coking powder, the red cinder and the tar. The raw materials are mixed by a mixer, and the iron mouth is not easy to be rigid when blocked by the fire-resistant blasting slime without water, and operation is easy. The diameter of the iron mouth is stable without the brush of large iron flow, and the operation of the furnaces is stable and reliable. Channel iron quantity and black slag quantity are reduced by 50 to 70%, and the dosage of the present invention is reduced by 70 to 80% than that of water blasting slime. The present invention has the advantages of cost reduction and economic benefit enhancement.

Description

The medium blast furnace anhydrous refractory tamping plug

The present invention relates to a kind of refractory materials that is exclusively used in medium-sized iron-smelting blast furnace stifled iron notch.

Be used at present the used stemming of iron-smelting blast furnace stifled iron notch both at home and abroad two kinds of anhydrous refractory tamping plug and hydrous taphole loams are arranged.The anhydrous refractory tamping plug stifled iron notch has many advantages, as: the degree of depth of blocking up is easy to control, blocks up to be difficult for being washed away expansion by molten iron, and the blast-furnace man is easy to operate, and quantity of black slag is few.But its cost is higher, is to be binding agent with the anthracene oil when preparing this anhydrous refractory tamping plug, pitch, grog agent, coke powder and silicon carbide is arranged in raw materials used, equipment used is the expensive pug mill of price, the granularity of raw material is tiny in the process for preparation, processed complex, and its hardness is also bigger when blocking up.This anhydrous refractory tamping plug is mainly used in large blast furnace (heat size 〉=1000m ³).And China mostly is medium and small blast furnace (heat size≤600m greatly ³), with such anhydrous refractory tamping plug, because clay gun thrust is little, mud is difficult for throwing into during stifled iron notch, and it is also harder to block up into back iron gate, push away electric drill iron mouth and be difficult for out, and cost is also higher.So what use at medium and small blast furnace is that the water refractory tamping plug is arranged, its making is to be tackiness agent with water, clay, coke powder, chamotte powder and pitch is reached sequencing in proportion join that the system of grinding forms on the pug mill, with such water refractory tamping plug stifled iron notch arranged, easy care not, the degree of depth of blocking up is neglected shallow deeply suddenly, instability, requirement to the iron mouth degree of depth can not guarantee normally to tap a blast furnace, in going out the molten iron process, block up and easily washed away greatly by slag and molten iron, cause and run big stream, casual slag iron, accident-proneness.Greatly increase with the mud amount in the operating process.To furnace condition anterograde with stablize unfavorablely, influence output and quality.

Purpose of the present invention is made a kind of anhydrous refractory tamping plug with a kind of new proportioning raw materials, is applicable to medium-sized iron-smelting furnace stifled iron notch usefulness, makes the iron mouth easily stifled, and cost is low, and is easy to operate, guarantees that the iron mouth is difficult for washing away when the stream molten iron.

The said anhydrous stemming of the present invention is used for medium-sized iron-smelting furnace, the used raw material of anhydrous refractory tamping plug is: soft clay, flint clay, chamotte powder, high-alumina fly, coke powder, anthracite slag, tar, their weight ratio were followed successively by 1: 0.3～0.5: 0.3～0.5: 0.3～0.5: 1.5～2.5: 0.3～0.5: 1.5～2: 0.Used coke powder is that meal and fine powder mix, and meal accounts for 20%.The granularity of soft clay, flint clay, high-alumina fly is less than 1mm, finely-ground coke, and the granularity of anthracite slag is less than 5mm, and the granularity of chamotte powder is less than 3mm, and the granularity of thick coke powder is at 5-10mm.

Medium-sized iron-smelting blast furnace uses such anhydrous stemming stifled iron notch, and in the process of tapping a blast furnace, iron mouth diameter is big by brush, and flowing molten iron is suitable stable, reduces or has avoided running the stokehold accident that big stream causes.Working of a furnace stable and reliable operation, this mud is high temperature resistant, and anti-washing away do not ruptured, dry slag iron not, sow iron amount and quantity of black slag reduce about 50-70%.The iron mouth stifled with this mud is not hard, can directly bore and appear iron, has alleviated blast-furnace man's labour intensity.Reduce 70-80% than what the water refractory tamping plug arranged with the mud amount, cost reduces, and economic benefit improves.

The present invention is realized by following examples:

The suitable heat size of the anhydrous stemming that above medium blast furnace is used is at 300m ³-600m ³, earlier used solid feed is added stirrer by proportioning, be sprayed into minor amount of water simultaneously, be about the 1.5-3.5% of raw material gross weight, after waiting to stir, added the tar stir about again 5-10 minute, promptly become required anhydrous refractory tamping plug.

Claims

1, a kind of anhydrous refractory tamping plug that is used for medium-sized iron-smelting blast furnace stifled iron notch, it is characterized in that: used raw material is soft soil, flint clay, chamotte powder, high-alumina fly, coke powder, anthracite slag, tar, and their weight ratio is followed successively by 1: 0.3～0.5: 0.3～0.5: 0.3～0.5: 1.5～2.5: 0.3～0.5: 1.5～2.0.

2, anhydrous refractory tamping plug according to claim 1 is characterized in that: used coke powder is that meal and fine powder mix, and meal accounts for 20%.

3, anhydrous refractory tamping plug according to claim 1 and 2, it is characterized in that: the granularity of used soft clay, flint clay and high-alumina fly is less than 1mm, finely-ground coke, and the granularity of anthracite slag is less than 5mm, the granularity of chamotte powder is less than 3mm, and the granularity of thick coke powder is at 5-10mm.