GB/T 25948-2010 English PDF

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GB/T 25948-2010: Aluminium ores -- Determination of total iron content -- Titanium trichloride reduction method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 25948-2010	194	Add to Cart	3 days	Aluminium ores -- Determination of total iron content -- Titanium trichloride reduction method	Valid

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Basic data

Standard ID: GB/T 25948-2010 (GB/T25948-2010)
Description (Translated English): Aluminium ores -- Determination of total iron content -- Titanium trichloride reduction method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H30
Classification of International Standard: 73.060.40
Word Count Estimation: 10,160
Date of Issue: 2010-12-23
Date of Implementation: 2011-09-01
Quoted Standard: GB/T 6379.2-2004; ISO 8558-1985; GB/T 25945-2010; GB/T 25949-2010
Adopted Standard: ISO 10213-1991, IDT
Regulation (derived from): National Standard Approval Announcement 2010 No.10 (Total No.165)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the amount of iron in the bauxite mercury pollution measurement methods. This standard applies to the determination of total iron to ferric oxide represented bauxite. Measuring range: 2% ~ 50%.

GB/T 25948-2010: Aluminium ores -- Determination of total iron content -- Titanium trichloride reduction method

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Aluminium ores. Determination of total iron content. Titanium trichloride reduction method ICS 73.060.40 H30 National Standards of People's Republic of China Determination of total iron bauxite Titanium trichloride reduction method (ISO 10213.1991, IDT) Issued on. 2010-12-23 2011-09-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard uses the translation method identical with ISO 10213.1991 (E) "Determination of total iron bauxite titanium trichloride reduction method." This standard Annex A, Annex B normative appendix. The standard proposed by China Nonferrous Metals Industry Association. This standard Nonferrous Metals by the National Standardization Technical Committee. This standard by the Aluminum Corporation of China Zhengzhou Research Institute, China Nonferrous Metals Industry Institute of Standards Metrology and Quality is responsible for drafting. This standard was drafted by the Aluminum Corporation of China Zhengzhou Research Institute. The main drafters of this standard. Road Xia, Zhang Aifen, Zhang Yuan grams, Zhao open. Determination of total iron bauxite Titanium trichloride reduction method

1 Scope

This standard specifies the total amount of iron in bauxite mercury pollution measurement method. This standard applies to the determination of total iron to ferric oxide represented bauxite. Measurement range. 2% to 50%.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. (Trueness and precision) - Part 2 Accuracy GB/T 6379.2-2004 measurement methods and results. the standard measurement to determine the party Method repeatability and reproducibility of the basic method (ISO 5725-2.1994) ISO 8558. 1985 Preparation of dry sample pre bauxite GB/T 25945-2010 bauxite sampling procedures (ISO 8685.1992, IDT) GB/T 25949-2010 bauxite sample preparation (ISO 6140.1991, IDT) Principle 3 The use of fusion with sodium peroxide decomposition test material, with hydrochloric acid melt melting block, tin dichloride was added to restore most of the iron (Ⅲ), trichloride The remaining reduction of titanium iron (Ⅲ), with dilute perchloric acid oxidation of excess reducing agent. In diphenyl amine sulfonate as indicator, with drops of potassium dichromate solution Given iron (Ⅱ).

4 Reagents

When analysis using analytical reagent, distilled water or equivalent purity. 4.1 Sodium peroxide. Dry powder. Warning. When sodium peroxide must be stored moisture, can not be used when the lumps. 4.2 hydrochloric acid (ρ20 = 1.16g/mL ~ 1.19g/mL). 4.3 hydrochloric acid (110). was diluted with hydrochloric acid (4.2). 4.4 perchloric acid (11). was diluted with perchloric acid (72%, ρ20 = 1.67g/mL). 4.5 - sulfuric acid phosphoric acid mixed solution. the phosphate 150mL (ρ20 = 1.70g/mL) was added with stirring to about 400mL of water, was added 150mL of sulfuric acid (ρ20 = 1.84g/mL), with water cooled, diluted with water to 1L. 4.6 potassium permanganate solution (25g/L). 4.7 stannous chloride solution (100g/L). 100g of crystalline tin dichloride dihydrate (SnCl2 · 2H2O) were dissolved in 200mL salt Acid (4.2), and the solution was heated in a water bath, diluted to 1L after cooling. This solution should be kept in a small tin particles containing a brown glass Bottle. 4.8 titanium trichloride solution (15g/L), an arbitrary selection of a method of preparation, the time is now equipped with. 4.8.1 diluted with 9 parts of hydrochloric acid (11) parts of a titanium trichloride solution (about 15%, TiCl3). ......

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