Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation of Binder for Chromite Oxidized Pellets

A technology for oxidizing pellets and chromite, which is applied in the field of preparation of binders for chromite oxidizing pellets, can solve the problem of long curing time, unsuitable for large-scale and fast-paced production, and cold-pressed pellet green strength. Insufficient and other problems, to achieve the effect of increasing labor intensity, improving falling strength and compressive strength, and improving spheroidization

Active Publication Date: 2020-09-25
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A method for preparing powdered chrome ore pellets of the invention has a simple process and reduces the amount of ferrochrome auxiliary materials used, but the strength of cold-pressed pellets is not enough and the curing time is long, so it is not suitable for large-scale and fast-paced production. Production

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation of Binder for Chromite Oxidized Pellets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1 Preparation of chromite oxide pellets of the present invention

[0041] a. Batching system: the raw material chromite concentrate (containing the following mass percentage components: Cr 2 o 3 20~56%, FeO 5~25%, Al 2 o 3 5~20%, MgO 5~20% and SiO 2 0.5% to 5%) and binder (a mixture of sodium bentonite: sodium humate with a mass ratio of 1:1) and mixed evenly, the amount of binder added accounts for 2% of the dry mass of chromite concentrate ;

[0042] b. Pelletizing system: moisten and grind the mixture, and then add water to the mixture in a disc pelletizer to make green pellets with a diameter of 10-16mm;

[0043] c. Set the drying, preheating and roasting system: the drying temperature is 300°C, the drying time is 6min, the preheating temperature is 950°C, the preheating time is 10min, the roasting temperature is 1250°C, and the roasting time is 20min.

[0044] After testing, the water content of the green balls obtained is 7.3%, the drop strengt...

Embodiment 2

[0045] Embodiment 2 Preparation of chromite oxide pellets of the present invention

[0046] a. Batching system: the raw material chromite concentrate (containing the following mass percentage components: Cr 2 o 3 20~56%, FeO 5~25%, Al2 o 3 5~20%, MgO 5~20% and SiO 2 0.5-5%) and binder (a mixture of calcium-based bentonite: sodium humate with a mass ratio of 1:1) and mixed evenly, the amount of binder added accounts for 2% of the dry mass of chromite concentrate ;

[0047] b. Pelletizing system: moisten and grind the mixture, and then add water to the mixture in a disc pelletizer to make green pellets with a diameter of 10-16mm;

[0048] c. Set the drying, preheating and roasting system: the drying temperature is 300°C, the drying time is 6min, the preheating temperature is 950°C, the preheating time is 10min, the roasting temperature is 1250°C, and the roasting time is 20min.

[0049] After testing, the water content of the green balls obtained is 7.3%, the drop streng...

Embodiment 3

[0050] Embodiment 3 Preparation of chromite oxide pellets of the present invention

[0051] a. Batching system: the raw material chromite concentrate (containing the following mass percentage components: Cr 2 o 3 20~56%, FeO 5~25%, Al 2 o 3 5~20%, MgO 5~20% and SiO 2 0.5~5%) and binder (a mixture of sodium bentonite: sodium humate with a mass ratio of 1:4) and mixed evenly, the amount of binder added accounts for 2% of the dry mass of chromite concentrate ;

[0052] b. Pelletizing system: moisten and grind the mixture, and then add water to the mixture in a disc pelletizer to make green pellets with a diameter of 10-16mm;

[0053] c. Set the drying, preheating and roasting system: the drying temperature is 300°C, the drying time is 6min, the preheating temperature is 950°C, the preheating time is 10min, the roasting temperature is 1250°C, and the roasting time is 20min.

[0054] After testing, the water content of the obtained green balls is 8.0%, the drop strength of...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
burst temperatureaaaaaaaaaa
burst temperatureaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the field of agglomeration of ferrochrome smelting raw materials, relates to an adhesive agent for preparation of chromite oxidized pellets and provides application of a composition serving as the adhesive agent for preparation of the chromite oxidized pellets. The composition comprises, by weight, 1-4 parts of bentonite and 1-4 parts of sodium humate. Ferrochrome concentrate difficult in pelletizing is strengthened by the adhesive agent prepared from bentonite and sodium humate in a specific ratio, the pelletizing performance of chromite is effectively improved, and raw pellet drop strength and compressive strength are improved. In addition, the invention provides a preparation method of the chromite oxidized pellets. The method is high in operability, avoids increasing of labor intensity and is suitable for popularization and utilization in industrial production.

Description

technical field [0001] The invention relates to a binder for preparing chromite oxidized pellets, and belongs to the field of agglomerating raw materials for ferrochrome alloy smelting. Background technique [0002] In the metallurgical industry, chromite is mainly used to produce ferrochrome alloy. Ferrochromium is an alloy mainly composed of chromium and iron, which can improve the physical, chemical and mechanical properties of steel and castings, and improve the quality of steel and castings. Ferrochrome alloy is an "industrial monosodium glutamate" for smelting special steel and smelting cast iron to regulate the composition of molten metal. It is widely used to produce a variety of high-strength, corrosion-resistant, wear-resistant and serviceable special steel and castings for unconventional purposes. . Common chromium-containing steel products include stainless steel, tool steel, high-chromium cast iron, medium-chromium cast iron, and low-chromium cast iron. The m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/242
CPCC22B1/2406C22B1/242
Inventor 叶明峰潘成余彬尹丹凤
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP