Light magnesia ball

1 range

This standard stipulates the technical requirements, test methods, inspection rules, packaging, marking and quality certificate of light burnt magnesia ball.

This standard is applicable to light burned magnesia balls used for converter slag making in converter steelmaking.

2 normative citation

The terms in the following documents are cited by this standard and become the terms of this standard. All subsequent amendments (excluding errors) or revisions to date-referenced documents do not apply to this standard. However, it is encouraged that the parties who have reached an agreement under this standard can use the latest version of these documents. The latest version of any non dated reference document is used in this standard.

Method for chemical analysis of magnesia and magnesia-aluminium (aluminium-magnesium) refractories GB/T 5069.1-2001. Gravimetric method for the determination of ignition loss

Methods for chemical analysis of magnesia and magnesia-aluminium (aluminium-magnesium) refractories GB/T 5069.2-2001 Molybdenum blue photometric method for the determination of silicon dioxide content

Chemical analysis methods for magnesia and magnesia-aluminium (aluminium-magnesium) refractories GB/T 5069.11-2001 Complexometric titration method for the determination of calcium oxide and magnesium oxide content

Test method for compression strength of GB/T 5072-1985 compact shaped refractory products at room temperature

Light magnesia ball

3 technical requirements

3.1 the chemical composition and physical properties of light burned magnesia ball should meet the requirements of the following table:

project

Chemical composition (%) SiO2

MgO S water quality indicators

Less than 3.50

More than 65

Spot check

Less than 1

3.2 particle size requirements: 40 to 60mm, of which less than 5mm is not greater than 5%.

Compressive strength: greater than 1.5 KN/

4 inspection methods and inspection rules

4.1 burn test was conducted according to GB/T 5069.1-2001. 4.2 chemical analysis is based on 2 normative reference documents. 4.3 the test of compression force is carried out according to GB/T 5072-1985. 4.4 particle size test of light burned magnesia ball, 5 inspection rule according to GB/T 2007.

5.1 the quality inspection of light burned magnesia ball is responsible for the quality department. The quality department will report the analysis results to the relevant units as soon as possible after receiving the samples.

5.2 batches: no more than 500 tons per batch.

5.3 each batch shall be sampled not less than 15 kg, and shall be evenly sampled from various bags. The quality inspection and acceptance of 5.3 light magnesia balls should comply with the requirements of YB/T 5142. 6 quality inspection

6.1 the quality judgement of light burned magnesia ball is based on the results of conventional analysis. 6.2 the quality of light burned magnesia balls is based on the chemical analysis results of each batch. 7 storage, transportation and quality certificates

7.1 Light burnt magnesia balls are packed in polypropylene woven bags of 1 ton each, ensuring that the contents are not exposed and leaked, and indicating the name of the product and the name of the supplier; each batch must be accompanied by a quality certificate.

7.3 The chemical analysis report of the quality inspection department shall indicate the product name, inspection serial number, and inspection results, inspection date and inspector.