CN1052069A - Composite metering water hole shaped by vibration and pressurization - Google Patents

Abstract

The present invention is the compound metering nozzle of a kind of continuous small-billet casting, and it is made of high alumina matter matrix (1), zirconium matter complex (2).The salic height of matrix material, complex directly uses unformed zirconium dioxide raw material, vibration extrusion forming, easy fired.So metering nozzle intensity height of the present invention, the life-span is long, and production technology is simple, and cost is low, and good integrity is safe and reliable.

Description

Composite metering water hole shaped by vibration and pressurization

What the present invention relates to is the auxiliary device that is used for supplying melting metal, is a kind of little square billet continuous casting steel metering nozzle.

On the continuous casting installation for casting of the little square billet of many casting, do not adopt chock plug and slide gate nozzle to cast at present.So just lost and regulated the function of blowhole diameter, thus require must keep almost constant aperture in the whole process of metering nozzle in extremely long casting time, to guarantee the stable casting speed of continuous casting steel machine.

Because zirconium dioxide and zircon sand have the anti-corrosion damage of high temperature and resistance to abrasion, thus the requirement that the metering nozzle aperture is constant can be guaranteed, but because zirconium dioxide material price costliness all is small-sized and composite construction.

General little square billet continuous casting steel metering nozzle has three types: (1) whole metering nozzle (perhaps being full homogeneous metering nozzle), and its chemical composition is even, good integrity, safe and reliable, mechanical pressing, high temperature burns till, but because of the zirconium dioxide consumption is big, so the production cost height.(2) inserted metering nozzle (perhaps being the combined type metering nozzle), it is made up of matrix and two parts of mosaics, two respectively moulding of part, high temperature burns till.Burn till and with adhesive the two is bonded together afterwards.Cost of material is low, but the production process complexity, mosaics is easily eccentric, easily comes off when watering steel, and security reliability is poor.(3) direct combination formula metering nozzle (perhaps being the convolution metering nozzle), it is made up of matrix and complex two parts, and complex is the waste base of inner tube made from high zirconium material, and the matrix material adopts low zirconium material.The waste base of inner tube is put into mould, and skin adds the common extrusion forming of matrix material for whole; Or the high-pressure molding that feeds in raw material respectively, again use after high temperature burns till.The use of this kind metering nozzle is dangerous easily to be burst, but its good integrity, cost is low.

Luoyang refractory material research institute has applied for " vibration moulding direct combination metering nozzle " patent on April 10th, 1985, and application number is 85102743, and this patent is owing to use Al ₂O ₃＞46% bauxite clinker is as the matrix material of metering nozzle, Al ₂O ₃Content is lower, so serviceability is relatively poor.Zirconium matter complex uses stabilized zirconia to make raw material (ZrO ₂＞95%), could obtain stable zirconium dioxide after must processing processing to unformed zirconium dioxide, process complications like this, cost has also improved.Simultaneously because the stabilizing agents such as interpolation CaO have also descended fire resistance.In addition, this metering nozzle outside is surrounded by iron sheet, also makes processed complex, and cost improves.

In view of the problem of above-mentioned existence, the objective of the invention is to design the compound metering nozzle of a kind of novel vibrating extrusion forming, improve its serviceability, life-saving, and technology is simple, and cost is low, and is safe and reliable.

For realizing this purpose, the good effect of Adopts measure of the present invention and generation is: the matrix material of this metering nozzle adopts one-level bauxite chamotte (Al ₂O ₃〉=80%), flint clay grog (Al ₂O ₃〉=44%), multiple state semisoft clay (Al ₂O ₃〉=35%) as raw material, make the matrix of metering nozzle contain Al ₂O ₃Up to 72～74%, improved the serviceability of metering nozzle.Zirconium matter complex is except using zircon sand (ZrO ₂〉=60%) outside, also directly uses amorphous zirconium dioxide (ZrO ₂〉=99.5%) as raw material, need not process and be processed into stable zirconium dioxide, reduce like this technical process and reduced cost.Simultaneously, because of the adverse effect of the stabilizing agents such as no CaO, so improved fire resistance.This metering nozzle outside is not surrounded by iron sheet, adopts the vibration extrusion forming, has improved the intensity at the mouth of a river.

Below in conjunction with drawings and Examples the present invention is described in detail:

Accompanying drawing is the structure chart of composite metering water hole shaped by vibration and pressurization.

As shown in drawings, composite metering water hole shaped by vibration and pressurization is made up of (1) matrix, (2) complex.

Complex (2) is with zircon sand (ZrO ₂〉=60%) and amorphous zirconium dioxide (ZrO ₂〉=99.5%) is raw material; Grain size proportion for＞0.045mm and＜0.045mm respectively accounts for 50～55% and 50～45% respectively; Wherein＜0.045mm person with arbitrary proportion with addition of unformed zirconium dioxide; Bond uses phosphoric acid solution, outer dosage 2.5～4%; After the hydraulic press moulding, under 1550～1650 ℃, burn till the pipe body.

Matrix (1) is by one-level bauxite chamotte (Al ₂O ₃〉=80%), flint clay grog (Al ₂O ₃〉=44%), multiple state semisoft clay material (Al ₂O ₃〉=35%), adds that matrix material that 10～14% phosphoric acid solution bonds form makes; Its grain size proportion is:＜3mm person accounts for 60%, and wherein bauxite chamotte is 75: 25 with the ratio of flint clay grog, and＜0.088mm person accounts for 40%, wherein bauxite chamotte: the flint clay grog: multiple state semisoft clay is 75: 12.5: 12.5.

The manufacture process of composite metering water hole shaped by vibration and pressurization is: prefabricated tubulose zirconium matter complex is placed mould, add the matrix material then, moulding on the vibration pressure forming machine that our company develops voluntarily gets final product the demoulding behind the failure of oscillation, and makes goods behind 350～550 ℃ of following easy fireds.

The present invention vibrates the composite metering nozzle of extrusion forming, and its matrix material is formulated by three kinds of raw materials, makes the Al of matrix (1) ₂O ₃Content is up to 72-74%, and complex directly uses unformed zirconium dioxide raw material in addition, on the one hand need not process processing, makes that technology is simple, cost is low, in addition because of the harmful effect of the stabilizing agents such as no CaO, so that performance improved.Its service life was above 7 hours.

Owing to use the special vibration pressure forming machine moulding of our company, greatly improved the intensity of metering nozzle.

Embodiment

Use ZrO ₂Content is 62% zircon sand and ZrO ₂Content is 99.5% amorphous zirconium dioxide raw material; Grain size proportion is:＞0.045mm and＜0.045mm person respectively accounts for 50%, wherein＜0.045mm person in amorphous zirconium dioxide account for 70%; Add 4% concentration and be 60% phosphoric acid solution bond, under 1550～1650 ℃, burning till pipe shape complex (2) after the moulding on the hydraulic press.

The matrix material is selected Al ₂O ₃Content is 80% one-level bauxite chamotte, Al ₂O ₃Content is 45% flint clay grog, Al ₂O ₃Content is that 35% multiple state semisoft clay is raw material; Grain size proportion is:＜3mm person accounts for 60%, wherein the one-level bauxite chamotte accounts for 75%, the flint clay grog accounts for 25%,＜0.088mm person accounts for 40%, wherein the one-level bauxite chamotte accounts for 75%, flint clay grog and multiple state semisoft clay respectively account for 12.5%, add 14% concentration and be 60% phosphoric acid solution bond.

Place mould fixing prefabricated complex (2), add the matrix material that mixes again, on the vibration pressure forming machine, apply fixation pressure and vibration moulding, after the failure of oscillation demoulding, be goods with 350 ℃ of heat treated.

This composite metering water hole shaped by vibration and pressurization uses at Anshan Iron and Steel Works II six stream billet casters, and being recorded to the longest casting time is 7 hours 17 minutes and 7 hours 5 minutes.

Claims (3)

1, a kind of compound metering nozzle that is made of high alumina matter matrix (1) and zirconium matter complex (2) is characterized in that:

A) this compound metering nozzle is the vibration extrusion forming,

B) High-Alumina matrix (1) adopts one-level bauxite chamotte, flint clay grog, multiple state semisoft clay to make raw material, makes Al in the matrix ₂O ₃Content up to 72～74%,

C) zirconium matter complex (2) directly uses amorphous zirconium dioxide to make raw material.

2, composite metering nozzle according to claim 1 is characterized in that High-Alumina matrix (1) is by containing Al ₂O ₃〉=80% one-level alumine, contain Al ₂O ₃〉=44% flint clay grog, contain Al ₂O ₃〉=35% multiple state semisoft clay adds that matrix material that 10～14% phosphoric acid solution bonds form makes.

3, compound metering nozzle according to claim 1 and 2 is characterized in that zirconium matter complex (2) is to contain ZrO ₂〉=60% zircon sand and contain ZrO ₂〉=99.5% amorphous zirconium dioxide is a raw material, adds 2.5～4% phosphoric acid solution bonds, mechanical pressing and the pipe body that burns till in 1550～1650 ℃ of high temperature.