(2)A few amount of MgO can improve the flow property of 630 stainless steel continuous casting mold slag, but when the content of MgO is more than 3%, the melting point of slag sample rises。 With the increase of the content of Na2O in the continuous casting mold slag, the melting point of the slag decreased significantly。 When the content of CaF2 in continuous casting mold is increasing, the melting point of the continuous casting process is decreased and when the content is 3%, the minimum value is reached。With the content of CaF2 is increased, and the melting point of slag is also increased。 The proper amount of Al2O3 can reduce the melting point of the continuous casting mould slag。 When the content of Al2O3 is 4%, the slag sample melting point can reach the lowest value。When the Al2O3 content is increased, the slag melting point is increased。 With the increase of B2O3 content, the melting point of continuous casting mold slag slag decreased, and its effect on melting point is great。

(3)When melting of low alkalinity, with the increase of basicity of slag, slag samples decreased gradually until reached the lowest point; with further increasing of basicity of slag samples, slag melting point by point to increase, and the rising rate of increase gradually。

(4)With the increase of the amount of soot, the melting speed of 630 stainless steel continuous casting mould fluxes is decreased。

(5)In this paper, the optimal ratio of the mold flux of 630 stainless steel continuous casting mold is determined: basicity（CaO/SiO2）:1。1; B2O3:5%; Na2O:12%;CaF2:3%;MgO:6%;Al2O3:4%; Cr2O3:4%;Tm:1110℃。

Key words：Stainless steel, Continuous casting mold slag,Melting temperature, Melting rate

目 录

第一章 绪论 1

1。1 概述 1

1。2 国内外对连铸保护渣的研究 1

1。2。1 连铸保护渣的研究现状 1

1。2。2 连铸保护渣研究中面临的问题 2

1。3 本文的研究内容及意义 3

1。3。1 本文的研究意义 3

1。3。2 本文的研究内容 3

第二章 不锈钢连铸保护渣渣系的研究 4

2。1 连铸保护渣的作用 4

2。2  保护渣组分与物理性能的关系 6

2。2。1 保护渣各组分与熔化温度的关系 6

2。2。2 保护渣各组分与熔化速度的关系 7

2。3  不锈钢连铸保护渣渣系选择 7

2。3。1 不锈钢连铸保护渣的碱度选择原则 7

2。3。2 原料配比的选择原则 8

2。3。3 碳质材料的选择 9

2。4  保护渣熔化温度及熔速的测量 9

2。4。1 实验设备 9

2。4。2 实验方法 10

2。4。3 实验步骤 11

第三章 实验结果及分析 13

3。1 630 不锈钢保护渣熔点熔速的实验结果 13

3。2 不同组分对保护渣熔点和熔速的影响规律 14

3。2。1 不同组分对熔化温度的影响规律 14

3。2。2 连铸保护渣组分最优组合的选择